422
ACUS45 KWBC 250247
SCCNS5
STORM SUMMARY NUMBER 8 FOR CALIFORNIA ATMOSPHERIC RIVER
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
700 PM PST WED DEC 24 2025
...PERIODIC HEAVY RAINFALL CONTINUES TO STREAM INTO CALIFORNIA,
BRINGING DANGEROUS FLASH FLOODING HAZARDS, HIGH WINDS, AND HIGH
ELEVATION WINTER STORM CONDITIONS THROUGH FRIDAY...
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, AND
NORTHWESTERN ARIZONA.
FOR A DETAILED GRAPHICAL DEPICTION OF THE LATEST WATCHES, WARNINGS
AND ADVISORIES, PLEASE SEE WWW.WEATHER.GOV
AT 700 PM PST...NATIONAL RADAR AND SURFACE OBSERVATIONS SHOW A
1000 MB (29.53 IN HG) SURFACE LOW HAS MOVED INTO SOUTHERN
WASHINGTON, PUSHING THE COLD FRONT INTO PARTS OF WASHINGTON,
OREGON, AND EASTERN CALIFORNIA INTO PARTS OF NEVADA. ROUNDS OF
HEAVY RAINFALL HAS STREAMED INTO SOUTHERN CALIFORNIA AND PARTS OF
THE CALIFORNIA COAST, DUE TO SURGES OF MOISTURE FROM THE
ATMOSPHERIC RIVER THAT HAS COME ASHORE. WIDESPREAD RAIN AND GUSTY
WINDS HAS MOVED ACROSS EASTERN CALIFORNIA INTO PARTS OF NEVADA AND
OREGON, AHEAD OF THE COLD FRONT.
...SELECTED PRELIMINARY STORM TOTAL SNOWFALL IN INCHES FROM 400 PM
PST SAT DEC 20 THROUGH 700 PM PST WED DEC 24...
..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 700 PM PST WED DEC 24...
..CALIFORNIA
HONEYDEW 3.2 SSE 11.46
STORRIE 7.2 S 11.16
HILLCREST 1.3 E 10.68
BLUE CANYON 10.61
MIDDLE FK LYTLE CREEK 10.57
WHITETHORN 1.7 NNW 10.45
CAZADERO 1.3 SSE 10.05
JARBO GAP 9.88
COGSWELL DAM 9.65
CHILAO SOUTH 9.45
OLD MAN MOUNTAIN 9.45
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
WRIGHTWOOD FS 8.46
DUTCH FLAT 0.7 S 8.01
LAYTONVILLE 1 SW 7.72
ORTEGA HILL 7.71
ETTERSBURG 2.8 N 7.52
MORMON ROCK 7.25
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
DINKEY CREEK 4.65
YOSEMITE NP 4.54
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
TEHACHAPI 3.63
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
MATTOLE ROAD 109
PABLO POINT 108
MAGIC MOUNTAIN TRUCK 96
PINE MOUNTAIN FIRE ROAD 95
LONE TREE TOWERS 93
HIGH GLADE LOOKOUT 91
OLD COAST TOWER 91
WALKER 4 SSW 90
MINES TOWER 89
OAT MOUNTAIN 89
MONO 84
NORTH RANCH 82
SANTA CRUZ ISLAND 81
INYO 80
ROUND VALLEY 2 SSW 80
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
PURISIMA HILLS 60
KENTUCKY SPRINGS 58
GRAPEVINE 4 SSW 57
EMIGRANT GAP 51
REDDING 51
RED BLUFF 48
..NEVADA
WASHOE 87
DOUGLAS 66
PERIODIC RAINFALL AND GUSTY WINDS ARE EXPECTED TO CONTINUE ACROSS
PARTS OF CALIFORNIA INTO CHRISTMAS DAY, ESPECIALLY OVER SOUTHERN
CALIFORNIA WHERE MULTIPLE ROUNDS OF HEAVY RAINFALL ARE EXPECTED
THROUGH FRIDAY. FLASH FLOODING IS ONGOING AND IS LIKELY TO PERSIST
AS RAINFALL CONTINUES. VULNERABLE AREAS INCLUDE URBAN AREAS, HIGH
ELEVATIONS INTO THE FOOTHILLS, AND BURN SCARS. THE LINE OF HEAVY
RAINFALL CONTINUES TO MOVE EAST OF CENTRAL CALIFORNIA INTO NEVADA
AND PARTS OF WESTERN IDAHO. MEANWHILE, VERY HEAVY SNOW MEASURED IN
FEET WILL IMPACT THE HIGHER ELEVATIONS OF THE SIERRA NEVADA OVER
THE NEXT FEW DAYS. ANOTHER ROUND OF HEAVY RAINFALL AND GUSTY WINDS
WILL BE REINFORCED 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 AM PST. PLEASE REFER TO YOUR LOCAL NATIONAL WEATHER
SERVICE OFFICE FOR ADDITIONAL INFORMATION ON THIS EVENT.
OUDIT
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