FIRE WEATHER 8/15/19

DAILY FIRE WEATHER & FIRE INFO
To: ALL UNITS From:
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Date: 8/15/19

SKYWARN: NORMAL
NETS ON WED NIGHT @1900 HEAPS PK./WX
SKYWARN NET TUESDAY @ 1900 HRS TABLE Mt.
BRIEFS TABLE MT. ON SUN @ 1800 HRS

DAYS NO R.F. @ STA.:85

National Preparedness Level (PL 2 )

Southern California Area Preparedness Level: (PL 2 )

Northern California Area Preparedness Level (PL 2 )

GREEN = PL: 1 BLUE – PL:2 YELLOW = PL:3 ORANGE = PL:4 RED = PL: 5
==============================================================================
SYNOP: (NWS SAN DIEGO)
The heat will continue today with high temperatures similar to those of Wednesday. Low inland humidity combined with gusty southwest to west winds will produce near critical fire weather conditions for the desert slopes of the mountains into the deserts during the afternoon and early evening through Friday with a gradual recovery in humidity during the weekend. A trough of low pressure moving into the western states will bring a cooling trend for Friday into the weekend with weekend high temperatures near to slightly below average. Another warming trend is expected for the early to middle part of next week with midweek high temperatures similar to those during the peak of the heat this week. A shallow marine layer will deepen slightly during the weekend, then become shallower again next week. This will keep areas near the coast cooler with higher humidity.

Temperatures will remain 5 to 10 degrees above normal today, with 80s to low 90s across the mountains and mid 90s to 108 in the valleys.

· Temperatures will cool a few degrees Friday.

· Minimum humidity will be mainly in the single digits and teens away from the coastal areas through Friday.

· Temperatures will cool to near normal this weekend.

· Minimum humidity will increase to 15% to 25% away from the coastal areas this weekend, except widespread single digit humidity will continue across the deserts.

· Southwest to west afternoon and evening winds of 15 to 25 mph with gusts to 40 mph will surface across the desert passes Friday through this weekend.

· Temperatures will warm Monday through the middle of next week, with triple digit heat expected over most valley and foothill locations by Tuesday.

· Minimum humidity will drop back into the single digits and teens away from the coastal areas starting Tuesday.

· There will be no shower or thunderstorm activity across the region through the middle of next week.

Heatwave – Inland, Hottest Conditions Across the Lower Deserts
High Confidence
Excessive heat lower deserts and hot conditions over the inland valleys.Heat-related illness possible if precautions are not taken.
Details
– What: Dangerous heat inland.
● An Excessive Heat Warning is in effect for the lower deserts through Thursday evening
● A Heat Advisory is in effect for the Inland Empire and inland San Diego County through Thursday evening.
– Where: Inland. High temperatures:
● Lower Deserts: 112-118
● Inland Empire and High Deserts: 100 to 105
● Inland San Diego: 95-100, isolated foothill locales 100-105
– When: through Thursday evening

NWS LAS VEGAS SYNOP– (NORTH & EAST OF COUNTY)
Dangerous heat will continue across the Mojave Desert and portions of Lincoln County through Friday. A few weak weather systems to the north will bring some afternoon breezes and drop temperatures to near normal over the weekend, providing some much needed relief. Wind gusts should generally be below 30 mph through the weekend. Critical RH values will be present each afternoon at 10 percent or less. Dry conditions and mostly sunny skies expected through the middle of next week.

FLASH FLOOD POTENTIAL INDEX FOR EXTREME SOUTHWESTERN CALIFORNIA

DRY WEATHER WILL CONTINUE THROUGH AT LEAST THE MIDDLE OF NEXT WEEK.

Inland Empire
NONE NONE
San Bernardino County Mountains
NONE NONE
High Desert Including Apple and Lucerne Valleys NONE NONE
San Gorgonio Pass Near Banning NONE NONE

Flash Flood Codes: GREEN: NONE YELLOW: LOW ORANGE: MODERATE RED: HIGH

SPECIAL NOTES:

DAILY FUELS/FIRE POTENTIAL:
The potential for large fire will be slightly elevated away from the coastal areas through Friday due to above normal temperatures and very low humidity. The large fire threat will become low this weekend as temperatures cool and humidity increases. Hot and dry conditions will cause the potential for large fire to increase once again next week. Fuels will continue to dry away from the coastal areas over the next week due to the absence of the monsoon. Expect light to moderate initial attack activity across the area through the middle of next week.

• Fire Danger / Dispatch Levels / Burn Status

• VALLEY: HIGH HIGH SRA: SUSPENDED LOCAL: NO

• DESERT: HIGH HIGH SRA: SUSPENDED LOCAL: YES

• MOUNTAINS: HIGH HIGH SRA: SUSPENDED LOCAL: NO

• OWENS VALLEY: HIGH HIGH SRA: SUSPENDED LOCAL: NO

• Burn Index and Ignition Component:

• OWENS VALLEY: BI: 76 IC: 70

• OAK CREEK: BI: 81 IC: 75

• FAWNSKIN: BI: 00 IC:00

• BDF MILL CREEK: BI: 175 IC: 100

• YUCCA VALLEY: BI: 82 IC: 76

• DEVORE: BI: 130 IC: 80

• MORMON ROCK: BI: 168 IC: 95

• HEAPS PEAK: BI: 30 IC: 47

APPLE VALLEY: BI: 74 IC: 68

SANTA ANA WILDFIRE THREAT INDEX: TODAY: GREY-NO RATING
—————————————————————————-
APPLE VALLEY / HESPERIA-VICTOR VALLEY (CAZ260):
.THURSDAY… Sky/weather………Sunny.
Max temperature…..100 to 107. 24 HR TREND……Up 1 degree.
Min humidity……..5 percent. 24 HR TREND……Little change.
WIND (20 FT)……..Winds west 6 to 13 mph. Gusts to 25 mph in the afternoon.
CWR (>0.10 IN)……0 percent. LAL……………..1.

.THURSDAY NIGHT… Sky/weather………Clear.
Min temperature…..65 to 75. 24 HR TREND……Up 2 degrees.
Max humidity……..15 to 25 percent. 24 HR TREND……Little change.
WIND (20 FT)……..Winds southwest 6 to 13 mph with gusts to 30 mph.
CWR (>0.10 IN)……0 percent. LAL……………..1.

.FRIDAY… Sky/weather………Sunny.
Max temperature…..97 to 104. 24 HR TREND……Down 1 degree.
Min humidity……..5 to 10 percent. 24 HR TREND……Up 5 percent.
WIND (20 FT)……..Winds west 8 to 18 mph. Gusts to 35 mph.
CWR (>0.10 IN)……0 percent. LAL……………..1.

*WRIGHTWOOD:
Thursday
Sunny, with a high near 84. Light and variable wind becoming east 5 to 10 mph in the morning.
Thursday Night
Clear, with a low around 65. West wind 10 to 15 mph, with gusts as high as 20 mph.
Friday
Sunny, with a high near 83. Southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Friday Night
Mostly clear, with a low around 61. Southwest wind 5 to 15 mph, with gusts as high as 20 mph.

*BIG PINES / WEST WRIGHTWOOD AREA
HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM PDT THURSDAY
Thursday
Sunny, with a high near 82. Light west northwest wind becoming southwest 5 to 10 mph in the afternoon. Winds could gust as high as 15 mph.
Thursday Night
Clear, with a low around 59. Southwest wind around 10 mph becoming west northwest in the evening. Winds could gust as high as 15 mph.
Friday
Sunny, with a high near 78. West southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Friday Night
Clear, with a low around 56

*PHELAN:
Thursday
Sunny, with a high near 96. Light and variable wind becoming south 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
Thursday Night
Clear, with a low around 70. Southwest wind around 10 mph, with gusts as high as 20 mph.
Friday
Sunny, with a high near 93. West wind 5 to 15 mph becoming south in the afternoon. Winds could gust as high as 20 mph.
Friday Night
Mostly clear, with a low around 65. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.

*TRONA:
.THURSDAY… Sky/weather………Sunny.
Max Temperature…..101-106. 24 HR Trend……Little change.
Min Humidity……..6 percent. 24 HR Trend……Little change.
20-Foot Winds…….Southwest 3-6 mph in the early morning shifting to the south 3-9 mph by afternoon.
LAL……………..1. Ventilation………Excellent. Mixing height…….14700 ft AGL.
Transport Winds…..Northwest around 5 mph in the morning shifting to the south in the afternoon.
Chc Wetting Rain….0 percent.

.THURSDAY NIGHT… Sky/weather………Clear.
Min Temperature…..72-77. 24 HR Trend……Little change.
Max Humidity……..17-27 percent. 24 HR Trend……Little change.
20-Foot Winds…….West 3-14 mph.
LAL……………..1. Chc Wetting Rain….0 percent.

.FRIDAY… Sky/weather………Sunny.
Max Temperature…..101-106. 24 HR Trend……Little change.
Min Humidity……..6-11 percent. 24 HR Trend……Up 1-3 percent.
20-Foot Winds…….Southwest 3-10 mph.
LAL……………..1.
Ventilation………Excellent.
Mixing height…….14800 ft AGL.
Transport Winds…..North around 5 mph in the morning shifting to the southwest in the afternoon.
Chc Wetting Rain….0 percent.

BARSTOW / DAGGETT / BAKER / FT. IRWIN (CAZ228):
.THURSDAY… * Sky/Weather………Sunny.
* Max temperature: * Valley floor….111-116. * 24 hr trend…..On average up 2 degrees.
* Min humidity: * Valley floor….4-6 percent. * 24 hr trend…..Little change.
* Wind (Slope/valley=20 ft, 10 min avg):
* Valley floor….Southwest wind up to 10 mph.
* 10000 ft msl….South 10 to 15 mph.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..6.

.THURSDAY NIGHT… * Sky/Weather………Clear.
* Min temperature: * Valley floor….71-76. * 24 hr trend…..Little change.
* Max humidity: * Valley floor….16-21 percent. * 24 hr trend…..Little change.
* Wind (Slope/valley=20 ft, 10 min avg):
* Valley floor….Southwest wind 10 to 15 mph.
* 10000 ft msl….Southwest 10 to 15 mph.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..6.

.FRIDAY… * Sky/Weather………Sunny.
* Max temperature: * Valley floor….108-113. * 24 hr trend…..On average down 3 degrees.
* Min humidity: * Valley floor….4-7 percent. * 24 hr trend…..Little change.
* Wind (Slope/valley=20 ft, 10 min avg):
* Valley floor….Southwest wind up to 10 mph increasing to 10 to 15 mph in the afternoon. Gusts up to 25 mph.
* 10000 ft msl….South 15 to 20 mph becoming southwest 10 to 15 mph in the afternoon.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..5.

*BAKER:
Thursday
Sunny and hot, with a high near 113. Southeast wind 5 to 8 mph becoming southwest in the afternoon.
Thursday Night
Clear, with a low around 81. Southwest wind 7 to 9 mph becoming southeast after midnight.
Friday
Sunny and hot, with a high near 112. Southwest wind 6 to 9 mph.
Friday Night
Clear, with a low around 78. Southwest wind 6 to 14 mph, with gusts as high as 20 mph.

SOUTHERN OWENS VALLEY / EAST SIERRA FOOTHILLS:
.THURSDAY… * Sky/Weather………Mostly sunny.
* Max temperature: * Valley floor….102-107. * 7000 feet…….87-92. * 24 hr trend…..Little change.
* Min humidity: * Valley floor….5-7 percent. * 7000 feet…….7-17 percent. * 24 hr trend…..Little change.
* Wind (slope/valley=20 ft, 10 min avg):
* Slope/valley….Northwest winds up to 10 mph shifting to the south around 10 mph in the afternoon.
* Upper slopes….Upslope/upvalley 4 to 8 mph becoming south around 10 mph in the afternoon.
* 10000 ft msl….Southeast up to 10 mph.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..6.

.THURSDAY NIGHT… * Sky/Weather………Mostly clear.
* Min temperature: * Valley floor….65-70. * 7000 feet…….37-42. * 24 hr trend…..Little change.
* Max humidity: * Valley floor….24-29 percent. * 7000 feet…33-38 percent. * 24 hr trend…On average up 2 percent.
* Wind (slope/valley=20 ft, 10 min avg):
* Slope/valley….West winds up to 10 mph.
* Upper slopes….West winds up to 10 mph.
* 10000 ft msl….Southwest up to 10 mph in the evening becoming light and variable.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..6.

.FRIDAY… * Sky/Weather………Sunny.
* Max temperature: * Valley floor….101-106. * 7000 feet…….85-90. * 24 hr trend…..Little change.
* Min humidity: * Valley floor….7-9 percent. * 7000 feet…….9-19 percent. * 24 hr trend…On average up 2 percent.
* Wind (slope/valley=20 ft, 10 min avg):
* Slope/valley….West winds up to 10 mph shifting to the south around 10 mph in the afternoon.
* Upper slopes….Southwest winds up to 10 mph.
* 10000 ft msl….Light and variable becoming southwest up to 10 mph in the afternoon.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..6.

KERN CO. DESERTS (CAZ298):
THURSDAY… Sky/weather………Sunny.
Max Temperature…..99-104. 24 HR Trend……Little change.
Min Humidity……..8-18 percent. 24 HR Trend……Little change.
20-Foot Winds…….West 3-7 mph in the early morning shifting to the southwest 3-12 mph by afternoon.
LAL……………..1.
Ventilation………Excellent.
Mixing height…….14500 ft AGL.
Transport Winds…..Southwest 5 to 10 mph.
Chc Wetting Rain….0 percent.

.THURSDAY NIGHT… Sky/weather………Clear.
Min Temperature…..68-73. 24 HR Trend……Little change.
Max Humidity……..29-39 percent. 24 HR Trend……Little change.
20-Foot Winds…….West 3-13 mph.
LAL……………..1. Chc Wetting Rain….0 percent.

.FRIDAY… Sky/weather………Sunny.
Max Temperature…..97-102. 24 HR Trend……Down 1-3 degrees.
Min Humidity……..9-19 percent. 24 HR Trend……Up 1-3 percent.
20-Foot Winds…….Southwest 3-8 mph in the early morning increasing to 5-12 mph by afternoon.
LAL……………..1.
Ventilation………Excellent.
Mixing height…….14700 ft AGL.
Transport Winds…..West 5 to 10 mph.
Chc Wetting Rain….0 percent.

INLAND EMPIRE (CAZ248):
HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM PDT THURSDAY…
THURSDAY… Sky/weather………Sunny.
Max temperature…..96 to 104. 24 HR TREND……Little change.
Min humidity……..10 to 15 percent. 24 HR TREND……Little change.
WIND (20 FT)……..Variable 2 to 5 mph becoming west 6 to 11 mph with gusts to 25 mph in the afternoon.
CWR (>0.10 IN)……0 percent. LAL……………..1.

.THURSDAY NIGHT… Sky/weather………Clear.
Min temperature…..63 to 70. 24 HR TREND……Down 1 degree.
Max humidity……..45 to 55 percent. 24 HR TREND……Up 5 percent.
WIND (20 FT)……..Winds west 6 to 11 mph with gusts to 20 mph in the evening becoming variable 2 to 5 mph.
CWR (>0.10 IN)……0 percent. LAL……………..1.

.FRIDAY… Sky/weather………Sunny.
Max temperature…..93 to 101. 24 HR TREND……Down 4 degrees.
Min humidity……..10 to 15 percent. 24 HR TREND……Up 5 percent.
WIND (20 FT)……..Winds west 6 to 11 mph. Gusts to 25 mph in the afternoon.
CWR (>0.10 IN)……0 percent. LAL……………..1.

*DEVORE:
HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM PDT THURSDAY…
. Thursday
Sunny, with a high near 99. Light and variable wind becoming southwest 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
Thursday Night
Clear, with a low around 66. Southwest wind 5 to 10 mph becoming light and variable in the evening. Winds could gust as high as 20 mph.
Friday
Sunny, with a high near 95. Light and variable wind becoming southwest 10 to 15 mph in the morning. Winds could gust as high as 25 mph.
Friday Night
Clear, with a low around 61.

*CHINO HILLS:
HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM PDT THURSDAY…
Thursday
Sunny, with a high near 92. Light and variable wind becoming southwest 10 to 15 mph in the morning. Winds could gust as high as 25 mph.
Thursday Night
Clear, with a low around 63. West wind 10 to 15 mph decreasing to 5 to 10 mph after midnight. Winds could gust as high as 25 mph.
Friday
Sunny, with a high near 88. Light and variable wind becoming southwest 10 to 15 mph in the morning. Winds could gust as high as 25 mph.
Friday Night
Clear, with a low around 60

*COLTON:
HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM PDT THURSDAY…
Thursday
Sunny, with a high near 102. Light west wind increasing to 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Thursday Night
Clear, with a low around 69. Southwest wind 5 to 10 mph becoming light after midnight.
Friday
Sunny, with a high near 99. Light southwest wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
Friday Night
Clear, with a low around 66.

SAN BERNARDINO N.F. (CAZ255/CAZ256):
.THURSDAY… Sky/weather………Sunny.
Max temperature…..77 to 87 above 6000 feet to 85 to 95 below 6000 feet. 24 HR TREND……Down 4 degrees.
Min humidity……..5 to 10 percent. 24 HR TREND……Down 5 percent.
WIND (20 FT)……..
SLOPES………..Winds west 6 to 13 mph. Gusts to 30 mph in the afternoon.
RIDGETOP………Winds southeast 6 to 8 mph becoming southwest 6 to 13 mph with gusts to 30 mph in the afternoon.
CWR (>0.10 IN)……0 percent. LAL……………..1.

.THURSDAY NIGHT… Sky/weather………Clear.
Min temperature…..49 to 59 above 6000 feet to 57 to 67 below 6000 feet. 24 HR TREND……Up 2 degrees.
Max humidity…10 to 15 percent on desert slopes to 20 to 30 percent on coastal slopes. 24 HR TREND…Little change.
WIND (20 FT)……..
SLOPES………..Winds west 6 to 13 mph with gusts to 30 mph.
RIDGETOP………Winds southwest 6 to 12 mph with gusts to 25 mph.
CWR (>0.10 IN)……0 percent. LAL……………..1.

.FRIDAY… Sky/weather………Sunny.
Max temperature…..75 to 85 above 6000 feet to 82 to 92 below 6000 feet. 24 HR TREND……Down 1 degree.
Min humidity…..5 to 10 percent on desert slopes to 10 to 15 percent on coastal slopes. 24 HR TREND…Up 10 percent.
WIND (20 FT)……..
SLOPES………..Winds west 6 to 16 mph. Gusts to 30 mph.
RIDGETOP………Winds west 7 to 14 mph. Gusts to 30 mph.
CWR (>0.10 IN)……0 percent. LAL……………..1.

*LAKE ARROWHEAD SCHOOL- AREA:
Thursday
Sunny, with a high near 86. Southeast wind 5 to 10 mph becoming southwest 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.
Thursday Night
Clear, with a low around 66. South wind 5 to 10 mph.
Friday
Sunny, with a high near 82. South wind 5 to 15 mph, with gusts as high as 25 mph.
Friday Night
Clear, with a low around 62. Southeast wind 5 to 10 mph, with gusts as high as 20 mph

*BIG BEAR SCHOOL AREA:
Thursday
Sunny, with a high near 83. Southeast wind 5 to 15 mph becoming north in the afternoon. Winds could gust as high as 20 mph.
Thursday Night
Clear, with a low around 49. Southwest wind around 10 mph, with gusts as high as 20 mph.
Friday
Sunny, with a high near 81. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Friday Night
Mostly clear, with a low around 45. Southwest wind 5 to 15 mph, with gusts as high as 20 mph.

BANNING PASS:
.THURSDAY… Sky/weather………Sunny.
Max temperature…..113 to 118. 24 HR TREND……Up 2 degrees.
Min humidity……..5 percent. 24 HR TREND……Little change.
WIND (20 FT)……..Winds west 6 to 15 mph with gusts to 30 mph.
CWR (>0.10 IN)……0 percent. LAL……………..1.

.THURSDAY NIGHT… Sky/weather………Clear.
Min temperature…..77 to 86. 24 HR TREND……Down 2 degrees.
Max humidity……..10 to 15 percent. 24 HR TREND……Little change.
WIND (20 FT)……..Winds west 9 to 19 mph with gusts to 35 mph.
CWR (>0.10 IN)……0 percent. LAL……………..1.

.FRIDAY… Sky/weather………Sunny.
Max temperature…..109 to 114. 24 HR TREND……Down 4 degrees.
Min humidity……..5 percent. 24 HR TREND……Little change.
WIND (20 FT)……..Winds west 8 to 18 mph. Gusts to 25 mph…becoming 35 mph in the afternoon.
CWR (>0.10 IN)……0 percent. LAL……………..1.

JOSHUA TREE AREA (CAZ261):
.THURSDAY… * Sky/weather…………………Sunny.
* Max Temperature……………..97-111. * 24 hr trend………………Little change.
* Min Humidity………………..3-8 pct. * 24 hr trend………………3 pct drier.
* Winds – 20 foot…Slope/Valley..Northwest 5 to 10 mph in the morning becoming southwest 5 to 15 mph in the afternoon.
* Winds…10000 FT MSL…………Southwest 10 to 15 mph.
* Chance of Precip…………….0 percent. * CWR (>= 0.10 IN)…………….0 percent. * LAL………………………..1.
* Haines High Level Index………5 or moderate potential for large plume dominated fire growth.

.THURSDAY NIGHT… * Sky/weather…………………Clear.
* Min Temperature……………..67-80. * 24 hr trend………………Little change.
* Max Humidity………………..12-17 pct. * 24 hr trend………………Little RH change.
* Winds – 20 foot…Slope/Valley..West 5 to 15 mph.
* Winds…10000 FT MSL…………Light and variable in the evening becoming south 5 to 15 mph after midnight.
* Chance of Precip…………….0 percent. * CWR (>= 0.10 IN)…………….0 percent. * LAL………………………..1.

.FRIDAY… * Sky/weather…………………Sunny.
* Max Temperature……………..94-109. * 24 hr trend………………3 degrees cooler.
* Min Humidity………………..5-10 pct. * 24 hr trend………………Little RH change.
* Winds – 20 foot…Slope/Valley..Southwest 5 to 15 mph.
* Winds…10000 FT MSL…………Southwest 10 to 20 mph.
* Chance of Precip…………….0 percent. * CWR (>= 0.10 IN)…………….0 percent. * LAL………………………..1.
* Haines High Level Index………5 or moderate potential for large plume dominated fire growth.

NEEDLES, RIVER BAT. (CAZ229):
THURSDAY… * Sky/Weather………Sunny.
* Max temperature: * Valley floor….115-120. * 24 hr trend…..Little change.
* Min humidity: * Valley floor….2-7 percent. * 24 hr trend…..On average down 2 percent.
* Wind (Slope/valley=20 ft, 10 min avg):
* Valley floor….Upslope/upvalley 4 to 8 mph becoming south around 10 mph in the afternoon.
* 10000 ft msl….South 10 to 15 mph.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..6.
* Mixing height…….15200 ft agl.
* Transport winds…..Light winds becoming south around 10 knots in the afternoon.
* Ventilation………Excellent.

.THURSDAY NIGHT… * Sky/Weather………Clear.
* Min temperature: * Valley floor….79-84. * 24 hr trend…..Little change.
* Max humidity: * Valley floor….11-16 percent. * 24 hr trend…..Little change.
* Wind (Slope/valley=20 ft, 10 min avg):
* Valley floor….South wind around 10 mph in the evening becoming downslope/downvalley 2 to 5 mph.
* 10000 ft msl….Southwest 10 to 15 mph.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..6.

.FRIDAY… * Sky/Weather………Sunny.
* Max temperature: * Valley floor….113-118. * 24 hr trend…..On average down 2 degrees.
* Min humidity: * Valley floor….2-7 percent. * 24 hr trend…..Little change.
* Wind (Slope/valley=20 ft, 10 min avg):
* Valley floor….South wind up to 10 mph increasing to 10 to 15 mph in the afternoon.
* 10000 ft msl….Southwest 15 to 25 mph.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..6.
* Mixing height…….13900 ft agl. * Transport winds…..South 10 to 15 knots. * Ventilation………Excellent.

STATELINE – CLARK COUNTY BORDER:
.THURSDAY… * Sky/Weather………Sunny.
* Max temperature: * 4000 feet…….108-113. * 24 hr trend…..On average up 2 degrees.
* Min humidity: * 4000 feet…….5-7 percent. * 24 hr trend…..Little change.
* Wind (slope/valley=20 ft, 10 min avg):
* Slope/valley….Upslope/upvalley 4 to 8 mph becoming south around 10 mph in the afternoon.
* 10000 ft msl….South 10 to 15 mph.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..6.
* Mixing height…….15900 ft agl.
* Transport winds…..Light winds becoming south around 10 knots in the afternoon. * Ventilation………Excellent.

.THURSDAY NIGHT… * Sky/Weather………Mostly clear.
* Min temperature: * 4000 feet…….71-76. * 24 hr trend…..Little change.
* Max humidity: * 4000 feet…….11-16 percent. * 24 hr trend…..Little change.
* Wind (slope/valley=20 ft, 10 min avg):
* Slope/valley….Southwest winds up to 10 mph in the evening becoming downslope/downvalley 2 to 5 mph.
* 10000 ft msl….South 10 to 15 mph.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..6.

.FRIDAY… * Sky/Weather………Sunny.
* Max temperature: * 4000 feet…….106-111. * 24 hr trend…..On average down 2 degrees.
* Min humidity: * 4000 feet…….4-6 percent. * 24 hr trend…..Little change.
* Wind (slope/valley=20 ft, 10 min avg):
* Slope/valley….South winds up to 10 mph increasing to 10 to 15 mph in the afternoon. Gusts up to 25 mph.
* 10000 ft msl….Southwest 10 to 15 mph.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..6.
* Mixing height…….14800 ft agl. * Transport winds…..Light winds becoming southwest around 10 knots in the afternoon.
* Ventilation………Excellent.

*La Jolla CA
Thursday
Patchy fog before noon. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 71. Northwest wind 5 to 10 mph.
Thursday Night
Patchy fog after midnight. Otherwise, partly cloudy, with a low around 64. Northwest wind around 5 mph becoming calm after midnight.
Friday
Patchy fog before noon. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 70. Light and variable wind becoming west 5 to 10 mph in the afternoon.
Friday Night
Patchy fog after midnight. Otherwise, increasing clouds, with a low around 62. West wind around 5 mph becoming calm in the evening.

*Poway CA
HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM PDT THURSDAY
Thursday
Sunny, with a high near 91. Light north wind becoming west 5 to 10 mph in the morning.
Thursday Night
Mostly clear, with a low around 64. Northwest wind around 5 mph becoming calm in the evening.
Friday
Sunny, with a high near 88. Light west wind increasing to 5 to 10 mph in the afternoon.
Friday Night
Mostly clear, with a low around 62.

*CEDAR CITY Ut.
Thursday
Sunny, with a high near 95. Light and variable wind becoming west southwest 6 to 11 mph in the afternoon.
Thursday Night
Clear, with a low around 55. South wind 8 to 11 mph.
Friday
Sunny, with a high near 93. South wind 6 to 14 mph.
Friday Night
Clear, with a low around 54. South wind 10 to 13 mph.

*************************** L.A COUNTY ********************************
ELEVATED TO BRIEF CRITICAL FIRE DANGER ACROSS INTERIOR VALLEYS,
MOUNTAINS, AND DESERTS DUE TO VERY WARM AND DRY CONDITIONS,
COMBINED WITH GUSTY ONSHORE WINDS THROUGH FRIDAY

LOS ANGELS CO. SAN GABRIEL VALLEY (CAZ247/CAZ249):
THURSDAY… Sky/weather………Mostly sunny except patchy morning low clouds and fog.
Max temperature…..91-101. 24 hr trend……Down 3.
Min humidity……..15-35 percent. 24 hr trend……Little change.
20-foot winds…….Variable 3-6 mph becoming south to southwest 6-12 mph in the afternoon.
Marine layer……..800 ft asl. LAL……………..1. CWR (>0.10 IN)……0 percent.

.THURSDAY NIGHT… Sky/weather………Mostly clear except patchy low clouds and fog after midnight.
Min temperature…..62-69.
Max humidity……..75-100 percent except 50-65 percent in the hills.
20-foot winds…….South 6-12 mph with local gusts to 20 mph in the evening becoming variable 3-6 mph.
LAL……………..1. CWR (>0.10 IN)……0 percent.

.FRIDAY… Sky/weather………Mostly sunny except patchy morning low clouds and fog.
Max temperature…..86-96.
Min humidity……..25-40 percent.
20-foot winds…….Variable 3-6 mph becoming south to southwest 6-12 mph with local gusts to 20 mph in the afternoon.
LAL……………..1. CWR (>0.10 IN)……0 percent.

ANGELES NATIONAL FOREST (CAZ253):
HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM PDT THURSDAY
.THURSDAY… Sky/weather………Sunny.
Max temperature…..93-101 low elevations to 83-91 higher elevations. 24 hr trend……Little change.
Min humidity……..8-15 percent. 24 hr trend……Little change.
20-foot winds…….
Valleys/lwr slopes…Northwest 6-12 mph becoming southwest 10-20 mph with gusts to 25 mph in the afternoon.
Ridges/upr slopes….West to northwest 6-12 mph becoming southwest 10-20 mph with gusts to 25 mph in the afternoon.
Marine layer……..None. LAL……………..1. CWR (>0.10 IN)……0 percent.

.THURSDAY NIGHT… Sky/weather………Clear.
Min temperature…..69-75 low elevations to 61-67 colder valleys and peaks.
Max humidity……..20-35 percent except 40-50 percent colder valleys.
20-foot winds…….
Valleys/lwr slopes…West to southwest 10-20 mph with gusts to 25 mph in the evening becoming west to northwest 6-12 mph.
Ridges/upr slopes….Southwest 10-20 mph with gusts to 25 mph in the evening becoming west to northwest 6-12 mph.
LAL……………..1. CWR (>0.10 IN)……0 percent.

.FRIDAY… Sky/weather………Sunny.
Max temperature…..90-98 low elevations to 80-88 higher elevations.
Min humidity……..15-25 percent.
20-foot winds…….
Valleys/lwr slopes…West to northwest 6-12 mph becoming southwest 15-25 mph with gusts to 30 mph in the afternoon.
Ridges/upr slopes….West to northwest 6-12 mph becoming southwest 15-25 mph with gusts to 30 mph in the afternoon.
LAL……………..1. CWR (>0.10 IN)……0 percent.

ANTELOPE VALLEY (CAZ259):
.THURSDAY… Sky/weather………Sunny.
Max temperature…..95-105. 24 hr trend……Little change.
Min humidity……..5-11 percent. 24 hr trend……Little change.
20-foot winds…….West to southwest 6-12 mph becoming 10-20 mph with local gusts to 35 mph late in the afternoon. Isolated gusts to 45 mph near Lake Palmdale.
Marine layer……..None. LAL……………..1. CWR (>0.10 IN)……0 percent.

.THURSDAY NIGHT… Sky/weather………Clear.
Min temperature…..66-75.
Max humidity……..25-35 percent.
20-foot winds…….Southwest 15-25 mph with gusts to 35 mph in the evening becoming west 8-15 mph with gusts to 25 mph. Isolated gusts to 45 mph near Lake Palmdale.
LAL……………..1. CWR (>0.10 IN)……0 percent.

.FRIDAY… Sky/weather………Sunny.
Max temperature…..93-103.
Min humidity……..9-15 percent.
20-foot winds…….West 8-15 mph with local gusts to 25 mph becoming southwest 20-30 mph with gusts to 40 mph late in the afternoon.
Isolated gusts to 45 mph near Lake Palmdale.
LAL……………..1. CWR (>0.10 IN)……0 percent.

============================================================
THIS DAY IN WEATHER HISTORY:
2004: A thunderstorm dropped one to two inches of rain on Death Valley in a short time. Flash flooding and debris flows along Hwy 190 killed two in a pickup truck that was washed off the highway. About three miles of road was totally washed away and the National Park was closed for 10 days. 13 miles of Hwy 190 was closed nearly nine months for repairs to 13 miles of damaged roads.

2001: A strong dust devil in Menifee took down a shed.

1977: Hurricane Doreen tracked north northwestward along the west coast of Baja California, dissipating over the coastal waters. Most areas received at least two inches of rainfall with up to eight inches in the mountains starting on this day to 8/17. This occurred during the El Niño of 1977-78. 4.9 inches fell at Mt. Laguna, 4.5 inches at Borrego Palm Canyon, four inches at Palomar Mountain and Lake Henshaw, 3.26 inches at Borrego Springs (2.53 inches in six hours on 8/16, a 100 year event), and more than two inches in Palm Springs and in Riverside. 4.5 inches fell at the Salton Sea in just a few hours. Four died and $25 million in damage resulted in Southern California. Debris flows and flooding from Henderson Canyon into the Borrego Springs De Anza neighborhood damaged 100 homes. Mud flows grew to five feet deep. Flooded roads resulted in desert areas. Floods and crop damage was incurred at the Salton Sea.

1971: Heavy thunderstorms strike the Joshua Tree region. Flash flooding put debris and mud up to three feet deep on several highways around and west of Joshua Tree city.

1970: Heavy thunderstorms hit the desert. Flash flooding wiped out highway 95 north and south of Needles, as well as highway 66 in Helendale

1961: Early morning thunderstorms struck the entire Morongo Basin with up to 2.23 inches of rain between 1 and 3 am. Debris and water were observed at 12 feet deep in some places. Extensive flash flooding washed out roads, homes, businesses, railroads and communications lines. The flooded roads isolated Joshua Tree National Monument. Ten homes in southeast Joshua Tree city were flooded.

1958: A severe thunderstorm dropped heavy rain and hail two inches in diameter in the Oak Glen area. Tons of mud flowed from a burn area from a fire one month previous. The mud covered orchards, Oak Glen Road and left mud up to three feet deep across a 500 foot length below Ford Canyon. The hail caused extensive damage to the apple crop.

1918: An unseasonable cold front went through the region, producing some of the lowest maximum temperatures on record.
==================================================================
TROPICAL EAST PACIFIC REPORT:
For the eastern North Pacific…east of 140 degrees west longitude:

A weak area of low pressure located about 1400 miles west-southwest of the southern tip of the Baja California peninsula continues to produce limited showers and thunderstorms. Recent satellite-based wind data indicates that the circulation of the system is elongated and poorly defined. Environmental conditions are expected to be
marginally conducive for development for the next couple of days and a tropical depression could still form before the system reaches cooler waters and upper-level winds become unfavorable over the central Pacific. This disturbance is forecast to movewest-northwestward at 10 to 15 mph during the next couple of days.

* Formation chance through 48 hours…low…30 percent.

* Formation chance through 5 days…medium…40 percent.

An area of low pressure is forecast to form south or southeast of the southeastern coast of Mexico over the weekend. Environmental conditions are expected to be conducive for gradual development of the system early next week while it moves generally westward.

* Formation chance through 48 hours…low…near 0 percent.

* Formation chance through 5 days…low…30 percent.

======================================================================
CURRENT WEATHER @ HESP. @ 0830 Hrs. TEMP: 790 RH: 22% WIND: CALM
7.63” RF @ HESP. STA.SINCE OCT. 1st/20 Yr Avg: 7.12” : MONTH: 0.00” YTD S/F: 1.00” /
=================================================================
FIRES: UPDATED

National Preparedness Level (PL 2)
National Preparedness Level to PL 2 at 1300 PST WEDESDAY due to decreased significant fire activity across multiple Geographic Areas and an increase is resource capability nationally

Initial attack activity: Light (155 new fires)
New large incidents: 6
Large fires contained: 2
Uncontained large fires:*** 18
Area Command teams committed: 0
NIMOs committed: 0
Type 1 IMTs committed: 1
Type 2 IMTs committed: 3

Active Incident Resource Summary
GACC Incidents Cumulative Acres Crews Engines Helicopters Total Personnel
AICC 6 750,973 3 0 2 133
NWCC 13 69,067 33 64 18 1,562
ONCC 2 1,245 26 22 3 555
OSCC 3 2,609 7 12 1 217
NRCC 12 14,856 26 25 6 973
GBCC 19 127,371 35 69 14 1,438
SWCC 11 34,049 6 27 3 373
RMCC 2 220 0 0 0 4
EACC 0 0 0 0 0 0
SACC 10 19,837 0 17 0 98
Total 78 1,020,228 136 236 47 5,353

CDF FIRES TO DATE (STATE LANDS SRA)
Number of Fires and Acres:
Interval Fires Acres
January 1, 2019 through August 11, 2019 3,198 23,748
January 1, 2018 through August 11, 2018 3,834 618,996
5-Year Average (same interval) 3,753 254,395
2019 Combined YTD (CALFIRE & US Forest Service) 3,824 47,476

Southern California Area (PL 2 )
New fires: 29
New large incidents: 0
Uncontained large fires:

WEST FIRE 1
Last Updated 8/14/2019
Date Started 8/13/2019
Location Information off of 120th Street West and Coppermill Road, Lancaster
Lat/Long [34.675542, -118.342239]
Status Inactive
Percentage Contained 100%
Acres Burned 105
Fuel Type
Administrative Unit CAL FIRE Los Angeles County Fire Department
Command Team
Cause Under Investigation
Counties Los Angeles

Northern California Area (PL 2 )
CA-MEU Moose Fire: 225 acres grass and oak woodland, 65% contained

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