039
ACUS45 KWBC 241444
SCCNS5
STORM SUMMARY NUMBER 7 FOR CALIFORNIA ATMOSPHERIC RIVER
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
700 AM PST WED DEC 24 2025
... HEAVY RAINFALL IS STREAMING INTO CALIFORNIA, BRINGING
DANGEROUS FLASH FLOODING HAZARDS, HIGH WINDS, AND HIGH ELEVATION
WINTER STORM CONDITIONS ...
FLASH FLOOD WARNINGS ARE ONGOING ACROSS SOUTHERN CALIFORNIA.
FLOOD WATCHES REMAIN IN EFFECT FOR MUCH OF CALIFORNIA INTO
SOUTHERN NEVADA AND NORTHWESTERN ARIZONA.
WINTER STORM WARNINGS ARE IN EFFECT FOR THE SIERRA NEVADA AND INTO
THE INTERIOR HIGHER ELEVATIONS OF NORTHERN CALIFORNIA.
HIGH WIND WARNINGS AND ADVISORIES ARE IN EFFECT FOR THE WEST COAST
INCLUDING MUCH OF CALIFORNIA AND NEVADA, PORTIONS OF OREGON,
WESTERN WASHINGTON, AND NORTHWESTERN ARIZONA.
FOR A DETAILED GRAPHICAL DEPICTION OF THE LATEST WATCHES, WARNINGS
AND ADVISORIES, PLEASE SEE WWW.WEATHER.GOV
AT 600 AM PST...NATIONAL RADAR AND SURFACE OBSERVATIONS SHOW A 989
MB (29.21 IN HG) SURFACE LOW IN EXTREME SOUTHERN OREGON WITH AN
ATTENDANT COLD FRONT MOVING THROUGH CENTRAL AND NORTHERN
CALIFORNIA. ROUNDS OF HEAVY RAINFALL ARE STREAMING INTO SOUTHERN
CALIFORNIA AS THE SURGE OF MOISTURE WITH THE ATMOSPHERIC RIVER HAS
COME ASHORE. A LINE OF HEAVY RAIN CONTAINING GUSTY WINDS IS MOVING
ACROSS CENTRAL CALIFORNIA IN THE SACRAMENTO VALLEY AHEAD OF THE
COLD FRONT.
...SELECTED PRELIMINARY STORM TOTAL SNOWFALL IN INCHES FROM 400 PM
PST SAT DEC 20 THROUGH 600 AM PST TUE DEC 23...
..CALIFORNIA
CARPENTER RIDGE 10.7
BEAR VALLEY 1.1 S 8.7
HEAVENLY SKI BASE 7.0
NORTHSTAR SKI BASE 7.0
PALISADES TAHOE SKI BASE 4.0
..NEVADA
MT. ROSE SKI BASE 14.0
DIAMON PEAK SNOW BASE 6.0
...SELECTED PRELIMINARY STORM TOTAL RAINFALL IN INCHES FROM 400 PM
PST SAT DEC 20 THROUGH 600 AM PST TUE DEC 23...
..CALIFORNIA
HONEYDEW 3.2 SSE 11.46
STORRIE 7.2 S 11.16
HILLCREST 1.3 E 10.68
BLUE CANYON 10.61
WHITETHORN 1.7 NNW 10.45
CAZADERO 1.3 SSE 10.05
JARBO GAP 9.88
MEADOW VALLEY 5.6 WSW 8.93
WHITETHORN 1.4 NW 8.71
POTTER VALLEY 8.4 ENE 8.65
CASTELLA 1.8 E 8.64
DUTCH FLAT 0.7 S 8.01
LAYTONVILLE 1 SW 7.72
ETTERSBURG 2.8 N 7.52
GRASS VALLEY 5.5 SSE 7.23
MAD RIVER 7 SE 6.62
REDDING 2.1 NNW 5.93
BENBOW 3.8 SSE 5.90
EMIGRANT GAP 5.85
GARBERVILLE 0.8 NW 5.63
UKIAH 8 NW 5.20
DOS RIOS 3 SSE 5.15
BLUE LAKE 2 WNW 5.03
CRESCENT CITY 16.0 ESE 4.26
SANTA ROSA 2.5 SE 4.08
RICHARDSON GROVE 5 E 4.00
DINSMORE 2.3 W 3.88
EUREKA 2.2 S 3.56
TRINITY CENTER 3.27
SANTA CRUZ 8.9 NW 2.66
SAN RAFAEL 1.4 NW 2.65
SAN FRANCISCO 1.6 SE 1.92
...SELECTED PRELIMINARY PEAK WIND GUSTS IN MILES PER HOUR EARLIER
IN THE EVENT...
..CALIFORNIA
WALKER 4 SSW 90
MONO 84
INYO 80
ROUND VALLEY 2 SSW 80
MAGIC MOUNTAIN TRUCK 79
MILL CREEK 78
DE LA CONCEPCION 74
MAMMOTH LAKES 70
TV TOWERS RD 2 70
BARLEY FLATS RD 67
CAT CANYON ROAD 64
DANGEMOND 61
SANTA CRUZ ISLAND 61
PURISIMA HILLS 60
KENTUCKY SPRINGS 58
GRAPEVINE 4 SSW 57
EMIGRANT GAP 51
REDDING 51
RED BLUFF 48
..NEVADA
WASHOE 87
DOUGLAS 66
SOUTHERN CALIFORNIA CAN EXPECT BANDS AND MULTIPLE ROUNDS OF HEAVY
RAINFALL THROUGH LATE AFTERNOON INTO EARLY EVENING. FLASH FLOODING
IS ONGOING AND IS LIKELY TO PERSIST THIS AFTERNOON. VULNERABLE
AREAS INCLUDE URBAN AREAS, HIGH ELEVATIONS INTO THE FOOTHILLS, AND
BURN SCARS. THE INITIAL LINE OF HEAVY RAINFALL HAS MOVED EAST OF
COASTAL NORTHERN CALIFORNIA, INCLUDING THE BAY AREA, BUT BLUSTERY
AND SHOWERY CONDITIONS ARE LIKELY TO CONTINUE. MEANWHILE, VERY
HEAVY SNOW MEASURED IN FEET WILL IMPACT THE HIGHER ELEVATIONS OF
THE SIERRA NEVADA OVER THE NEXT FEW DAYS. A COUPLE MORE ROUNDS OF
HEAVY RAINFALL AND GUSTY WINDS WILL BE POSSIBLE FOR CALIFORNIA ON
CHRISTMAS DAY AND THEN AGAIN ON FRIDAY AS ANOTHER LOW PRESSURE AND
SURFACE FRONT APPROACH THE REGION. THE THREAT OF FLASH FLOODING,
GUSTY WINDS, A POSSIBLE TORNADO OR WATER SPOUT, POWER OUTAGES,
LANDSLIDES, AND MUDSLIDES WILL PERSIST INTO FRIDAY AS THE VERY
ACTIVE PATTERN CONTINUES.
THE NEXT STORM SUMMARY WILL BE ISSUED BY THE WEATHER PREDICTION
CENTER AT 700 PM PST. PLEASE REFER TO YOUR LOCAL NATIONAL WEATHER
SERVICE OFFICE FOR ADDITIONAL INFORMATION ON THIS EVENT.
WILDER
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