fire weather 5/23/20

DAILY FIRE WEATHER & FIRE INFO
ALL UNITS From: EMAIL: pdupree@bdcecs.org
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RADIO:(HAM) KG6ZHW
COUNTY F.D RADIO: #733784 CALL SIGN: COM-330 Date: 5/22/20
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.: 41

National Preparedness Level (PL 1 )

Southern California Area Preparedness Level: (PL 1 )

Northern California Area Preparedness Level (PL 1 )

GREEN = PL: 1 BLUE – PL:2 YELLOW = PL:3 ORANGE = PL:4 RED = PL: 5
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SOUTH OPS WX:
Mild conditions will continue today with the passage of an upper-level trough currently over the Great Basin. Above average temperatures and dry weather will accompany a strengthening ridge aloft for much of the upcoming week. Winds will be generally light Tuesday through Thursday with temperatures soaring 10 to 15 degrees above normal. A cut-off low pressure system will approach the state from the southwest at the end of next week, lowering temperatures and intensifying onshore winds.

ꞏ The marine layer has reached a depth between 3000 to 4000 feet this morning and will recede to the coast with diurnal heating.

ꞏ High temperatures will be slightly below normal today with the mountains reaching the mid-50’s to 60’s, valleys in the mid 70’s to mid 80’s, and lower elevation deserts in the 80’s to mid 90’s.

ꞏ Temperatures will begin to increase tomorrow as the major warming trend initiates. Highs will be 10 to 15 degrees above average by Tuesday with a few locations in the Inland Empire touching the century mark.

ꞏ Generally dry conditions below 30% will persist from the mountains east into adjacent valleys and deserts. Widespread minimum RH of 15 to 30% will accompany light offshore winds Monday and last through Thursday.

ꞏ Northerly winds of 20 to 30 mph, gusting to 50 mph, will exist through the Mojave and eastern deserts this afternoon and evening. Gusty northerly winds will also develop through Santa Barbara County the next couple of evenings with maximum speeds between 10 to 20 mph.

ꞏ Strong northeasterly winds will surface through LA and Ventura County for a few hours Monday morning. Winds will reach 20 to 30 mph with occasional gusts exceeding 50 mph before subsiding in the afternoon.

ꞏ Temperatures will decrease Friday and into next weekend with the presence of a low-pressure center just off the California coast.

SYNOP: (NWS SAN DIEGO)
Stronger onshore flow will bring cooling trend today. The marine layer is near 3500 feet today and will gradually lower through the week, likely becoming less than 1000 ft deep by midweek. High pressure will strengthen over CA next week, bringing considerable warming and drying. The heat is expected to peak for inland Tuesday through Thursday with high temperatures 10 to 15 degrees above normal.

KEY POINTS

. Gusty west winds will develop over the mountains, passes, and into the deserts this afternoon through tonight, with peak gusts of 30 to 40 mph.

. A long-duration heat event will occur Monday through at least Friday of next week in the valleys and deserts. The hottest days will be Tuesday through Thursday.

. An Excessive Heat Watch is in effect from Monday morning (May 25) through Friday evening (May 29) for all deserts.

_____

CONFIDENCE AND DETAILS

Gusty West Winds in Mountains, Passes, and Deserts through Tonight

High Confidence

Hazardous driving conditions, especially for high-profile vehicles

Forecast Details

. What: West winds with gusts of 30 to 40 mph, locally higher in wind prone locations.

. Where: Desert-facing mountain slopes, passes, and deserts. Strongest winds expected along I-10 through San Gorgonio Pass, and I-8 east of Boulevard.

. When: Through Tonight

Hot Weather in the Valleys and Deserts Next Week

Moderate Confidence

Hot temperatures will result in elevated heat risk, especially to vulnerable populations and those without adequate cooling.

Forecast Details

. What: High temperatures 10 to 15 degrees above seasonal normals. High temperatures in the valleys will be in the mid to upper 90s, perhaps hitting 100 in a few locations in the Inland Empire. Hottest days will be Tuesday and Wednesday for the valleys.

High temperatures in the lower deserts will climb to 100-105 degrees on Monday, 104-109 degrees on Tuesday and 108-113 degrees on Wednesday and Thursday.

High temperatures in the High Desert will be in the upper 90s to near 100 degrees on Monday and Tuesday, and 100-108 degrees Wednesday and Thursday.

An Excessive Heat Watch is in effect from Monday morning through Friday evening for all deserts.

. Where: Valleys and deserts

. When: Monday through at least Friday of next week. Hottest days will be Tuesday/Wednesday for the valleys and Wednesday/Thursday for the deserts

SUMMARY

A low pressure system to the north will result in cooler weather west of the mountains, increased onshore flow, and more widespread night and morning low cloud cover through Saturday. Gusty west winds will develop over the mountains and deserts this afternoon and evening, with peak gusts of 35-45 mph. Some locally higher gusts are possible in wind-prone locations.

As the low moves east on Sunday, an area of high pressure will begin to build over California. This will begin a warming trend that will last through most of next week. High temperatures are expected to be 10 to 15
degrees above normal by Tuesday and will continue through at least Friday. Most of the warming will be confined to the valleys and the deserts. Coastal areas will not be as hot, remaining at or slightly above normal, due to marine layer influences. Highs in the High Desert will range from 95-108 degrees and highs in the lower deserts will range from 100-113 degrees, with the hottest days on Wednesday and Thursday. Valley areas will be in the mid to upper 90s, perhaps some locations in the Inland Empire will reach 100
degrees. The hottest days in the valleys will be Tuesday and Wednesday.

NWS LAS VEGAS SYNOP– (NORTH & EAST OF COUNTY)
Gusty north winds will stick around through about noon today before starting to relax. Temperatures will be
around 5 degree cooler than Friday. Over the rest of the long holiday weekend, less wind and seasonal temperatures are expected, resulting in lower fire concerns. Temperatures will warm rapidly Tuesday-Friday likely resulting in the hottest conditions of the year thus far.

SPECIAL NOTES:
N/A

DAILY FUELS/FIRE POTENTIAL:
The upcoming hot and dry period will increase initial attack activity next week as favorable conditions for new ignitions exist. However, large fire potential will remain low throughout the forecast period as winds will be generally weak. Dead fuel moisture will rapidly decrease across the forecast area due to the excessive heat and poor nighttime recovery. Some relief is expected late next week as stronger onshore winds guide moisture further inland and temperatures decrease.

SANTA ANA WILDFIRE THREAT INDEX: TODAY: GREY-NO RATING

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APPLE VALLEY / HESPERIA-VICTOR VALLEY (CAZ260):
EXCESSIVE HEAT WATCH NOW IN EFFECT FROM TUESDAY AFTERNOON
THROUGH FRIDAY EVENING

TODAY… Sky/weather………Sunny.
Max temperature…..77 to 83. 24 HR TREND……Down 1 degree.
Min humidity……..10 percent. 24 HR TREND……Down 10 percent.
WIND (20 FT)……..Winds north 6 to 11 mph with gusts to 25 mph.
CWR (>0.10 IN)……0 percent. LAL……………..1.

.TONIGHT… Sky/weather………Clear.
Min temperature…..49 to 56. 24 HR TREND……Little change.
Max humidity……..30 to 40 percent. 24 HR TREND……Down 20 percent.
WIND (20 FT)……..Winds west 6 to 11 mph with gusts to 20 mph.
CWR (>0.10 IN)……0 percent. LAL……………..1.

.SUNDAY… Sky/weather………Sunny.
Max temperature…..84 to 90. 24 HR TREND……Up 7 degrees.
Min humidity……..10 percent. 24 HR TREND……Little change
WIND (20 FT)……..Winds west 6 to 9 mph with gusts to 20 mph becoming north around 6 mph in the afternoon.
CWR (>0.10 IN)……0 percent. LAL……………..1.

*WRIGHTWOOD:
Today
Sunny, with a high near 65. North wind 5 to 10 mph.
Tonight
Clear, with a low around 46. Northwest wind 5 to 10 mph.
Sunday
Sunny, with a high near 72. Northwest wind 5 to 10 mph becoming northeast in the afternoon.

*BIG PINES / WEST WRIGHTWOOD AREA
Today
Sunny, with a high near 63. North wind 10 to 15 mph, with gusts as high as 20 mph.
Tonight
Clear, with a low around 46. North wind 10 to 15 mph becoming light and variable after midnight. Winds could gust as high as 20 mph.
Sunday
Sunny, with a high near 70. Light and variable wind becoming north northeast 5 to 10 mph in the afternoon. Winds could gust as high as 15 mph.

*PHELAN:
EXCESSIVE HEAT WATCH NOW IN EFFECT FROM TUESDAY AFTERNOON
THROUGH FRIDAY EVENING
Today
Sunny, with a high near 73. West wind 5 to 10 mph becoming north in the morning.
Tonight
Clear, with a low around 52. North wind 5 to 10 mph becoming west in the evening. Winds could gust as high as 20 mph.
Sunday
Sunny, with a high near 79. West wind 5 to 10 mph becoming northeast in the afternoon.

TRONA (INDIAN WELLS) (CAZ298):
EXCESSIVE HEAT WATCH REMAINS IN EFFECT FROM WEDNESDAY MORNING
THROUGH FRIDAY EVENING
TODAY… Sky/weather………Mostly sunny.
Max Temperature…..78-83. 24 HR Trend……Little change.
Min Humidity……..7-16 percent. 24 HR Trend……Down 7-9 percent.
20-Foot Winds…….North 9-11 mph this morning shifting to east by afternoon.
LAL……………..1.
Ventilation………Excellent.
Mixing height…….8700 ft AGL.
Transport Winds…..North around 20 mph this morning decreasing to around 10 mph this afternoon.
Chc Wetting Rain….0 percent.

.TONIGHT… Sky/weather………Clear.
Min Temperature…..53-58. 24 HR Trend……Up 2-4 degrees.
Max Humidity……..38-48 percent. 24 HR Trend……Up 6-8 percent.
20-Foot Winds…….West 10-12 mph.
LAL……………..1. Chc Wetting Rain….0 percent.

.SUNDAY… Sky/weather………Sunny.
Max Temperature…..84-89. 24 HR Trend……Up 5-7 degrees.
Min Humidity……..7-13 percent. 24 HR Trend……Little change.
20-Foot Winds…….East 5-7 mph.
LAL……………..1.
Ventilation………Very good.
Mixing height…….8900 ft AGL.
Transport Winds…..North 5 to 10 mph.
Chc Wetting Rain….0 percent.

BARSTOW / DAGGETT / BAKER / FT. IRWIN (CAZ228):
EXCESSIVE HEAT WATCH REMAINS IN EFFECT FROM WEDNESDAY MORNING
THROUGH FRIDAY EVENING
TODAY… * Sky/Weather………Sunny.
* Max temperature: * Valley floor….86-91. * 24 hr trend…..On average down 6 degrees.
* Min humidity: * Valley floor….6-10 percent. * 24 hr trend…..On average down 3 percent.
* Wind (Slope/valley=20 ft, 10 min avg):
* Valley floor….North wind 10 to 15 mph with gusts to around 30 mph.
* 10000 ft msl….Northwest 10 to 15 mph.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..4.

.TONIGHT… * Sky/Weather………Mostly clear.
* Min temperature: * Valley floor….53-58. * 24 hr trend…..On average up 2 degrees.
* Max humidity: * Valley floor….22-27 percent. * 24 hr trend…..On average down 16 percent.
* Wind (Slope/valley=20 ft, 10 min avg):
* Valley floor….Northwest wind 10 to 15 mph.
* 10000 ft msl….North 10 to 15 mph.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..4.

.SUNDAY… * Sky/Weather………Sunny.
* Max temperature: * Valley floor….90-95. * 24 hr trend…..On average up 4 degrees.
* Min humidity: * Valley floor….6-9 percent. * 24 hr trend…..Little change.
* Wind (Slope/valley=20 ft, 10 min avg):
* Valley floor….North wind 10 to 15 mph.
* 10000 ft msl….Northwest 10 to 15 mph.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..4.

*BAKER:
EXCESSIVE HEAT WATCH REMAINS IN EFFECT FROM WEDNESDAY MORNING
THROUGH FRIDAY EVENING
Today
Sunny, with a high near 88. Breezy, with a north northwest wind 10 to 15 mph increasing to 18 to 23 mph in the morning. Winds could gust as high as 32 mph.
Tonight
Clear, with a low around 59. West northwest wind 5 to 9 mph becoming east after midnight.
Sunday
Sunny, with a high near 94. South wind 5 to 11 mph becoming north northwest in the morning.

SOUTHERN OWENS VALLEY / EAST SIERRA FOOTHILLS (CAZ226):
TODAY… * Sky/Weather………Sunny.
* Max temperature: * Valley floor….79-84. * 7000 feet…….63-68. * 24 hr trend…..On average down 5 degrees.
* Min humidity: * Valley floor….7-10 percent. * 7000 feet…….13-23 percent. * 24 hr trend…..On average down 3 percent.
* Wind (slope/valley=20 ft, 10 min avg):
* Slope/valley….North winds 10 to 15 mph.
* Upper slopes….North winds 10 to 15 mph.
* 10000 ft msl….North up to 10 mph.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..4.

.TONIGHT… * Sky/Weather………Mostly clear.
* Min temperature: * Valley floor….48-53. * 7000 feet…….23-28. * 24 hr trend…..On average up 6 degrees.
* Max humidity: * Valley floor….25-30 percent. * 7000 feet…….35-40 percent. * 24 hr trend…..On average down 8 percent.
* Wind (slope/valley=20 ft, 10 min avg):
* Slope/valley….North winds 10 to 15 mph.
* Upper slopes….North winds up to 10 mph shifting to the
northwest around 10 mph after midnight.
* 10000 ft msl….North around 10 mph.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..4.

.SUNDAY…
* Sky/Weather………Sunny.
* Max temperature: * Valley floor….85-90. * 7000 feet…….70-75. * 24 hr trend…..On average up 7 degrees.
* Min humidity: * Valley floor….8-11 percent. * 7000 feet…….15-25 percent. * 24 hr trend…..Little change.
* Wind (slope/valley=20 ft, 10 min avg):
* Slope/valley….North winds 10 to 15 mph.
* Upper slopes….Northeast winds 10 to 15 mph.
* 10000 ft msl….North around 10 mph.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..3.

KERN CO. DESERTS (CAZ299):
TODAY… Sky/weather………Mostly sunny.
Max Temperature…..75-80. 24 HR Trend……Little change.
Min Humidity……..16-26 percent. 24 HR Trend……Down 7-9 percent.
20-Foot Winds…….Northeast 10-12 mph this morning shifting to northwest by afternoon.
LAL……………..1.
Ventilation………Very good.
Mixing height…….8400 ft AGL.
Transport Winds…..North 10 to 15 mph.
Chc Wetting Rain….0 percent.

.TONIGHT… Sky/weather………Clear.
Min Temperature…..50-55. 24 HR Trend……Up 1-3 degrees.
Max Humidity……..43-53 percent. 24 HR Trend……Little change.
20-Foot Winds…….Northwest 8-10 mph.
LAL……………..1.
Chc Wetting Rain….0 percent.

.SUNDAY… Sky/weather………Sunny.
Max Temperature…..82-87. 24 HR Trend……Up 6-8 degrees.
Min Humidity……..11-21 percent. 24 HR Trend……Down 3-5 percent.
20-Foot Winds…….Northeast 7-9 mph in the morning shifting to southeast by afternoon.
LAL……………..1.
Ventilation………Good.
Mixing height…….9400 ft AGL.
Transport Winds…..North around 5 mph.
Chc Wetting Rain….0 percent.

INLAND EMPIRE (CAZ248):
TODAY… Sky/weather………Mostly cloudy…becoming mostly sunny. Patchy fog in the morning.
Max temperature…..74 to 82. 24 HR TREND……Down 2 degrees.
Min humidity……..30 to 40 percent. 24 HR TREND……Up 10 percent.
WIND (20 FT)……..Winds south around 6 mph becoming west 6 to 12 mph with gusts to 25 mph in the afternoon.
CWR (>0.10 IN)……0 percent. LAL……………..1.

.TONIGHT… Sky/weather………Mostly clear.
Min temperature…..51 to 57. 24 HR TREND……Up 1 degree.
Max humidity……..80 to 90 percent. 24 HR TREND……Down 10 percent.
WIND (20 FT)……..Winds west 6 to 11 mph with gusts to 25 mph in the evening becoming variable 2 to 5 mph.
CWR (>0.10 IN)……0 percent. LAL……………..1.

.SUNDAY… Sky/weather………Mostly sunny.
Max temperature…..83 to 90. 24 HR TREND……Up 8 degrees.
Min humidity……..15 to 25 percent. 24 HR TREND……Down 20 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:
Today
Sunny, with a high near 79. Light and variable wind becoming north 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Tonight
Clear, with a low around 57. Southwest wind 5 to 10 mph becoming light and variable.
Sunday
Sunny, with a high near 86. North wind 5 to 15 mph becoming southwest in the afternoon. Winds could gust as high as 20 mph.

*CHINO HILLS:
Today
Mostly cloudy, then gradually becoming sunny, with a high near 76. Light and variable wind becoming southwest 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
Tonight
Mostly clear, with a low around 54. Southwest wind 10 to 15 mph decreasing to 5 to 10 mph after midnight. Winds could gust as high as 25 mph.
Sunday
Sunny, with a high near 84. Light south wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.

*COLTON:
Today
Mostly sunny, with a high near 81. Light southwest wind becoming west 10 to 15 mph in the morning. Winds could gust as high as 25 mph.
Tonight
Mostly clear, with a low around 58. West wind 10 to 15 mph becoming light southwest in the evening. Winds could gust as high as 20 mph.
Sunday
Sunny, with a high near 89. Light southwest wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.

SAN BERNARDINO N.F. (CAZ255):
TODAY… Sky/weather………Mostly sunny.
Max temperature…..57 to 67 above 6000 feet to 65 to 75 below 6000 feet. 24 HR TREND……Up 1 degree.
Min humidity……..15 to 20 percent on desert slopes to 25 to 35 percent on coastal slopes. 24 HR TREND……Little change.
WIND (20 FT)……..
SLOPES………..Winds north 6 to 14 mph becoming west 6 to 11 mph in the afternoon. Gusts to 30 mph.
RIDGETOP………Winds north 6 to 10 mph with gusts to 20 mph.
CWR (>0.10 IN)……0 percent. LAL……………..1.

.TONIGHT… Sky/weather………Clear.
Min temperature…..35 to 45 above 6000 feet to 43 to 53 below 6000 feet. 24 HR TREND……Up 4 degrees.
Max humidity……..20 to 30 percent on desert slopes to 70 to 80 percent on coastal slopes. 24 HR TREND……Down 40 percent.
WIND (20 FT)……..
SLOPES………..Winds north 6 to 12 mph with gusts to 25 mph.
RIDGETOP………Winds north 6 to 11 mph with gusts to 25 mph.
CWR (>0.10 IN)……0 percent. LAL……………..1.

.SUNDAY… Sky/weather………Sunny.
Max temperature…..65 to 75 above 6000 feet to 72 to 82 below 6000 feet. 24 HR TREND……Up 7 degrees.
Min humidity……..10 to 15 percent. 24 HR TREND……Little change.
WIND (20 FT)……..
SLOPES………..Winds north 6 to 11 mph becoming west 6 to 10 mph in the afternoon. Gusts to 25 mph.
RIDGETOP………Winds north 6 to 10 mph with gusts to 20 mph.
CWR (>0.10 IN)……0 percent. LAL……………..1.

*LAKE ARROWHEAD SCHOOL- AREA:
Today
Sunny, with a high near 65. North wind 10 to 15 mph decreasing to 5 to 10 mph in the afternoon. Winds could gust as high as 25 mph.
Tonight
Clear, with a low around 48. Light and variable wind becoming north 10 to 15 mph after midnight. Winds could gust as high as 20 mph.
Sunday
Sunny, with a high near 71. North wind 5 to 15 mph becoming southwest in the afternoon. Winds could gust as high as 20 mph.

*BIG BEAR SCHOOL AREA:
Today
Sunny, with a high near 62. North wind 5 to 10 mph, with gusts as high as 20 mph.
Tonight
Clear, with a low around 39. Northwest wind around 5 mph becoming northeast after midnight.
Sunday
Sunny, with a high near 69. Northeast wind 5 to 10 mph becoming light and variable.

BANNING PASS (CAZ265):
EXCESSIVE HEAT WATCH NOW IN EFFECT FROM TUESDAY AFTERNOON
THROUGH FRIDAY EVENING
TODAY… Sky/weather………Sunny.
Max temperature…..90 to 95. 24 HR TREND……Down 1 degree.
Min humidity……..15 percent. 24 HR TREND……Up 5 percent.
WIND (20 FT)……..Winds west 6 to 16 mph with gusts to 30 mph.
CWR (>0.10 IN)……0 percent. LAL……………..1.

.TONIGHT… Sky/weather………Clear.
Min temperature…..61 to 69. 24 HR TREND……Up 2 degrees.
Max humidity……..30 to 40 percent. 24 HR TREND……Down 5 percent.
WIND (20 FT)……..Winds northwest 6 to 16 mph with gusts to 35 mph.
CWR (>0.10 IN)……0 percent. LAL……………..1.

.SUNDAY… Sky/weather………Sunny.
Max temperature…..95 to 100. 24 HR TREND……Up 7 degrees.
Min humidity……..5 to 10 percent. 24 HR TREND……Down 5 percent.
WIND (20 FT)……..Winds northwest 6 to 10 mph becoming east 6 to 9 mph in the afternoon. Gusts to 20 mph.
CWR (>0.10 IN)……0 percent. LAL……………..1.

JOSHUA TREE AREA (CAZ230):
EXCESSIVE HEAT WATCH REMAINS IN EFFECT FROM WEDNESDAY MORNING
THROUGH FRIDAY EVENING
TODAY… * Sky/weather…………………Sunny.
* Max Temperature……………..74-87. * 24 hr trend………………3 degrees cooler.
* Min Humidity………………..9-15 pct. * 24 hr trend………………Little RH change.
* Winds – 20 foot…Slope/Valley..Northwest 10 to 20 mph.
* Winds…10000 FT MSL…………West 10 to 20 mph.
* Chance of Precip…………….0 percent. * CWR (>= 0.10 IN)…………….0 percent. * LAL………………………..1.
* Haines High Level Index………3 very low potential for large plume dominated fire growth.

.TONIGHT… * Sky/weather…………………Clear.
* Min Temperature……………..52-62. * 24 hr trend………………Little change.
* Max Humidity………………..21-28 pct. * 24 hr trend………………17 pct drier.
* Winds – 20 foot…Slope/Valley..Northwest 5 to 15 mph.
* Winds…10000 FT MSL…………North 10 to 20 mph.
* Chance of Precip…………….0 percent. * CWR (>= 0.10 IN)…………….0 percent. * LAL………………………..1.

.SUNDAY… * Sky/weather…………………Sunny.
* Max Temperature……………..80-93. * 24 hr trend………………6 degrees warmer.
* Min Humidity………………..7-12 pct. * 24 hr trend………………3 pct drier.
* Winds – 20 foot…Slope/Valley..Northwest 5 to 15 mph.
* Winds…10000 FT MSL…………Northwest 10 to 15 mph.
* Chance of Precip…………….0 percent. * CWR (>= 0.10 IN)…………….0 percent. * LAL………………………..1.
* Haines High Level Index………4 low potential for large plume dominated fire growth.

NEEDLES, RIVER BAT. (CAZ229):
EXCESSIVE HEAT WATCH REMAINS IN EFFECT FROM WEDNESDAY MORNING
THROUGH FRIDAY EVENING
TODAY… * Sky/Weather………Sunny.
* Max temperature: * Valley floor….91-96. * 24 hr trend…..On average down 4 degrees.
* Min humidity: * Valley floor….5-13 percent. * 24 hr trend…..Little change.
* Wind (Slope/valley=20 ft, 10 min avg):
* Valley floor….Northwest wind 10 to 20 mph.
* 10000 ft msl….West 10 to 20 mph.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..4.
* Mixing height…….10100 ft agl.
* Transport winds…..North 10 to 15 knots.
* Ventilation………Excellent.

.TONIGHT… * Sky/Weather………Mostly clear.
* Min temperature: * Valley floor….57-62. * 24 hr trend…..On average down 3 degrees.
* Max humidity: * Valley floor….20-25 percent. * 24 hr trend…..On average down 13 percent.
* Wind (Slope/valley=20 ft, 10 min avg):
* Valley floor….North wind 10 to 15 mph.
* 10000 ft msl….Northwest 15 to 25 mph.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..4.

.SUNDAY… * Sky/Weather………Sunny.
* Max temperature: * Valley floor….94-99. * 24 hr trend…..On average up 3 degrees.
* Min humidity: * Valley floor….3-11 percent. * 24 hr trend…..On average down 2 percent.
* Wind (Slope/valley=20 ft, 10 min avg):
* Valley floor….North wind 10 to 15 mph.
* 10000 ft msl….Northwest 20 to 30 mph decreasing to 15 to 25 mph in the afternoon.
* CWR (>= 0.10 in)….0 percent.
* LAL……………..1. * Haines Index……..4.
* Mixing height…….11500 ft agl.
* Transport winds…..North 10 to 15 knots.
* Ventilation………Excellent.

STATELINE – CLARK COUNTY BORDER (NVZ465):
TODAY… * Sky/Weather………Sunny.
* Max temperature: * 4000 feet…….81-86. * 24 hr trend…..On average down 7 degrees.
* Min humidity: * 4000 feet…….7-10 percent. * 24 hr trend…..Little change.
* Wind (slope/valley=20 ft, 10 min avg):
* Slope/valley….North winds 10 to 15 mph. Gusts up to 30 mph in the morning.
* 10000 ft msl….Northwest 10 to 20 mph becoming 10 to 15 mph in the afternoon.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..4.
* Mixing height…….10000 ft agl.
* Transport winds…..North 10 to 15 knots.
* Ventilation………Very good.

.TONIGHT… * Sky/Weather………Mostly clear.
* Min temperature: * 4000 feet…….51-56. * 24 hr trend…..Little change.
* Max humidity: * 4000 feet…….22-27 percent. * 24 hr trend…..On average down 11 percent.
* Wind (slope/valley=20 ft, 10 min avg):
* Slope/valley….North winds 10 to 15 mph.
* 10000 ft msl….North 10 to 20 mph shifting to the northwest 15 to 20 mph after midnight.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..4.

.SUNDAY… * Sky/Weather………Sunny.
* Max temperature: * 4000 feet…….85-90. * 24 hr trend…..On average up 4 degrees.
* Min humidity: * 4000 feet…….8-11 percent. * 24 hr trend…..Little change.
* Wind (slope/valley=20 ft, 10 min avg):
* Slope/valley….North winds 10 to 15 mph.
* 10000 ft msl….Northwest 15 to 25 mph becoming 15 to 20 mph in the afternoon.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..4.
* Mixing height…….11300 ft agl.
* Transport winds…..North around 10 knots.
* Ventilation………Very good.

*La Jolla Ca
Today
Cloudy, then gradually becoming mostly sunny, with a high near 66. Southwest wind 5 to 10 mph.
Tonight
Mostly cloudy, with a low around 58. West wind around 5 mph becoming calm in the evening.
Sunday
Mostly cloudy, then gradually becoming sunny, with a high near 69. Calm wind becoming southwest around 5 mph in the afternoon.

*Poway Ca
Today
Partly sunny, with a high near 74. Southeast wind 5 to 10 mph becoming west in the afternoon.
Tonight
Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 56. West wind around 5 mph becoming calm in the evening.
Sunday
Patchy fog before 11am. Otherwise, sunny, with a high near 81. Light and variable wind becoming west 5 to 10 mph in the afternoon.

*Cedar City Ut.
Today and Tonight

The low pressure system over far northern Utah early this morning will track northeast in Wyoming today. Light rain and snow showers will linger across northern portions of the outlook area through early this evening.

Gradual clearing skies overnight along with light winds could lead to areas of below freezing temperatures across the northern agricultural areas late tonight. Valley locations near the Idaho border along with the Wasatch Mountain valleys could see a hard freeze with temperatures dropping into the mid to upper 20s.

.DAYS TWO THROUGH SEVEN…Sunday through Friday

Temperatures will begin to rebound after a cold morning Sunday. Temperatures Sunday afternoon will generally come in at readings near to a little below normal for late May.

A more substantial warming trend will begin early in the week. Temperatures across the outlook area will be well above late May norms, with high temperatures feeling more summer-like by the end of the week.
Today
Mostly sunny, with a high near 60. North wind around 10 mph.
Tonight
Mostly clear, with a low around 35. East northeast wind 7 to 10 mph.
Sunday
Sunny, with a high near 65. East northeast wind 7 to 11 mph becoming north in the afternoon.

*************************** L.A COUNTY ********************************
LOS ANGELS CO. SAN GABRIEL VALLEY (CAZ548):
Today
Cloudy through mid morning, then gradual clearing, with a high near 77. South southeast wind 5 to 10 mph becoming west southwest in the morning. Winds could gust as high as 15 mph.
Tonight
Increasing clouds, with a low around 56. West southwest wind 5 to 10 mph becoming light and variable after midnight. Winds could gust as high as 15 mph.
Sunday
Patchy fog before 11am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 84. Calm wind becoming west southwest around 5 mph in the afternoon.

LOS ANGELES COUNTY SAN FERNANDO VALLEY (CAZ547):
Today
Cloudy through mid morning, then gradual clearing, with a high near 76. Southeast wind 5 to 10 mph.
Tonight
Increasing clouds, with a low around 56. South wind 5 to 10 mph becoming light and variable after midnight.
Sunday
Patchy fog before 11am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 82. Light east southeast wind becoming south 5 to 10 mph in the afternoon.

SANTA CLARITA VALLEY (CAZ288):
Today
Patchy fog before noon. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 81. Light west northwest wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
Tonight
Clear, with a low around 55. West wind 10 to 15 mph becoming light and variable after midnight. Winds could gust as high as 20 mph.
Sunday
Sunny, with a high near 88. Breezy, with a light and variable wind becoming east northeast 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph.

SANTA MONICA MOUNTAINS RECREATIONAL AREA (CAZ246):
Today
Cloudy through mid morning, then gradual clearing, with a high near 73. East wind 5 to 15 mph becoming west in the afternoon. Winds could gust as high as 20 mph.
Tonight
Mostly clear, with a low around 56. West wind 5 to 15 mph becoming east after midnight. Winds could gust as high as 20 mph.
Sunday
Sunny, with a high near 79. East wind 5 to 10 mph becoming west in the afternoon.

ANGELES NATIONAL FOREST (CAZ254):
Today
Sunny, with a high near 73. Northeast wind around 10 mph becoming west northwest in the afternoon. Winds could gust as high as 15 mph.
Tonight
Clear, with a low around 52. West northwest wind 5 to 10 mph becoming light and variable. Winds could gust as high as 15 mph.
Sunday
Sunny, with a high near 80. East southeast wind 5 to 10 mph becoming northeast 10 to 15 mph in the morning. Winds could gust as high as 25 mph.

ANTELOPE VALLEY (CAZ259):
EXCESSIVE HEAT WATCH IN EFFECT FROM TUESDAY AFTERNOON THROUGH
THURSDAY EVENING
Today
Sunny, with a high near 81. Light and variable wind becoming northwest 5 to 10 mph in the afternoon.
Tonight
Clear, with a low around 49. Northwest wind 5 to 10 mph becoming south southwest after midnight.
Sunday
Sunny, with a high near 89. South southwest wind 5 to 15 mph becoming northeast in the morning. Winds could gust as high as 20 mph.

============================================================
THIS DAY IN WEATHER HISTORY:
2014: Thunderstorms over the mountains of San Diego County drifted over the adjacent deserts. Flash flooding occurred along and north of Highway 78, south of Borrego Springs.

2001: It was 116° in Palm Springs, the highest temperature on record for May. This also occurred on 5/28/2003 and 5/28/1983.

1960: An 8.5 magnitude earthquake hit Chile. Waves eight feet above normal hit San Diego. Tide currents were estimated at 20 to 25 knots. Docks near Pt. Loma were destroyed and extensive damage occurred to docks throughout San Diego harbor. A barge broke in half in Quivira Basin of Mission Bay. Ferry service to Coronado was disrupted. In LA a scuba diver drowned, there was major damage ($1 million) to small craft.

1932: Strong winds and low humidity hit San Diego County. 12 serious brush fires resulted, blackening nearly 2,000 acres in San Diego County. The biggest fire was in Spring Valley.
==================================================================
TROPICAL EAST PACIFIC REPORT:
Tropical cyclone formation is not expected during the next 5 days.

======================================================================
CURRENT WEATHER @ HESP. @ 0800 Hrs. TEMP: 610 RH: 44% WIND: CALM
7.20” RF @ HESP. STA.SINCE OCT. 1st/20 Yr Avg: 7.12” : MONTH: 0.00” YTD S/F: 4.50”
=================================================================
FIRES: UPDATED

National Preparedness Level (PL 1 )
National Fire Activity:
Initial attack activity: Light (94 new fires)
New large incidents: 1
Large fires contained: 2
Uncontained large fires:*** 8
Area Command teams committed: 0
NIMOs committed: 1
Type 1 IMTs committed: 0
Type 2 IMTs committed: 1

Active Incident Resource Summary
GACC Incidents Cumulative Acres Crews Engines Helicopters Total Personnel
AICC 0 0 0 0 0 0
NWCC 0 0 0 0 0 0
ONCC 0 0 0 0 0 0
OSCC 0 0 0 0 0 0
NRCC 0 0 0 0 0 0
GBCC 5 41,541 0 4 3 41
SWCC 1 1,492 6 12 3 220
RMCC 2 9,565 2 12 0 66
EACC 1 2,107 0 5 0 10
SACC 14 41,137 3 25 3 278
Total 23 95,842 11 58 9 615

CDF FIRES TO DATE (STATE LANDS SRA)
Number of Fires and Acres:
Interval Fires Acres
January 1, 2020 through May 17, 2020 1,321 1,542
January 1, 2019 through May 17, 2019 916 4,094
5-Year Average (same interval) 1,098 5,818
2020 Combined YTD (CALFIRE & US Forest Service) 1,486 2,201

Southern California Area (PL 1 )
No Reportable Incidents

Northern California Area (PL 1 )
No Reportable Incidents

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