HAZARDS TODAY

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WARNINGS AND HAZARDS

Active Weather Alerts HIGH WIND WATCH ISSUED: 4:42 AM MAR. 12, 2024 – NATIONAL WEATHER SERVICE

..HIGH WIND WATCH IN EFFECT FROM LATE WEDNESDAY NIGHT THROUGH THURSDAY AFTERNOON…

* WHAT…Northeast winds 30 to 40 mph with gusts to 75 mph possible. Isolated gusts to around 100 mph near the lower coastal foothills of the Santa Ana Mountains and for the lower coastal foothills near the Cajon Pass.

* WHERE…San Bernardino and Riverside County Valleys-The Inland Empire, San Bernardino County Mountains, Santa Ana Mountains
and Foothills, Orange County Coastal Areas and Orange County Inland Areas.

* WHEN…From late Wednesday night through Thursday afternoon.  IMPACTS…Damaging winds could blow down trees. Travel could be
difficult, especially for high profile vehicles.  ADDITIONAL DETAILS…Depending on location, the strongest winds
are expected some time from before dawn on Thursday morning into Thursday morning.

AR  AND SNOW LEVELS

 TEMPERATURE AND PRECIPITATION

SEVERE WEATHER OUTLOOK

 FIRE WEATHER FORECAST

DISCUSSION…
..Into this morning, there will be scattered light showers for the coast into portions of the valleys, mainly for San Diego County with a slight chance of light showers for those areas again late tonight. There will be gusty west winds in the mountains and deserts, strongest for this afternoon and evening with gusts to 40 to 50 mph and isolated gusts to 60 mph. Warmer with weaker winds for Wednesday. Cooler inland on Thursday with a potentially damaging northerly Santa Ana wind event for late Wednesday night through Thursday afternoon for Orange County, the Inland Empire,
and adjacent portions of the San Bernardino County mountains. A closed low pressure system over the southwest states will bring chances for showers and a slight chance for afternoon thunderstorms for Thursday night into Saturday with the greatest chances for the mountains. Then drier and warmer for Sunday and Monday.

Fire Weather Forecast for San Bernardino County Mountains Tuesday, Mar 12 2024

.TODAY…Sky/weather………Partly cloudy.
Max temperature…..41 to 51 above 6000 feet to 52 to 62 below 6000 feet. 24 HR TREND……Up 3 degrees.
Min humidity……..30 to 40 percent on desert slopes to 55 to 65 percent on coastal slopes. 24 HR TREND……Up 15 percent.
WIND (20 FT)……..SLOPES………..Winds west 15 to 25 mph. Gusts to 30 mph…becoming 40 mph in the afternoon.
RIDGETOP………Winds west 15 to 25 mph. Gusts to 35 mph…becoming 45 mph in the afternoon.

.TONIGHT…Sky/weather………Mostly cloudy…becoming partly cloudy.
Min temperature…..24 to 34 above 6000 feet to 32 to 41 below 6000 feet. 24 HR TREND……Up 3 degrees.
Max humidity……..50 to 60 percent on desert slopes to 85 to 95 percent on coastal slopes. 24 HR TREND……Little change.
WIND (20 FT)…….. SLOPES………..Winds west 19 to 29 mph with gusts to 40 mph.
RIDGETOP………Winds west 21 to 31 mph with gusts to 55 mph.
.WEDNESDAY…Sky/weather………Partly cloudy…becoming mostly sunny.
Max temperature…..43 to 53 above 6000 feet to 50 to 60 below 6000 feet. 24 HR TREND……Up 1 degree.
Min humidity……..20 to 30 percent on desert slopes to 30 to 40 percent on coastal slopes. 24 HR TREND……Down 15 percent.
WIND (20 FT)…….. SLOPES………..Winds northwest 9 to 19 mph with gusts to 30 mph.
RIDGETOP………Winds northwest 11 to 21 mph with gusts to 40 mph…becoming 6 to 11 mph with gusts to 20 mph in the afternoon.

FORECAST DAYS 3 THROUGH 7…SUSTAINED WINDS LESS THAN 20 MPH EXCEPT WHEN SPECIFIED

.WEDNESDAY NIGHT…Mostly clear. Lows in the lower 30s. North winds around 11 mph.
.THURSDAY…Cooler, sunny. Highs in the mid 40s. North winds around 20 mph.

THURSDAY NIGHT…Partly cloudy with slight chance of showers. Lows in the mid 30s. North winds around 11 mph.
.FRIDAY…Partly cloudy. Slight chance of showers in the morning, then chance of showers and slight chance of thunderstorms in the
afternoon. Highs in the upper 40s. North winds around 9 mph.
.FRIDAY NIGHT…Mostly clear. Slight chance of showers in the evening. Lows in the mid 30s. North winds around 6 mph.
.SATURDAY…Mostly sunny. Slight chance of showers in the morning, then slight chance of showers and thunderstorms in the
afternoon. Highs in the lower 50s. North winds around 10 mph.
.SATURDAY NIGHT…Mostly clear. Lows in the upper 30s.
.SUNDAY…Mostly sunny. Highs in the upper 50s.
.SUNDAY NIGHT…Mostly clear. Lows in the lower 40s.
.MONDAY…Mostly sunny. Highs in the lower 60s.