135
WWUS46 KSTO 202111
WSWSTO
URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE SACRAMENTO CA
211 PM PDT MON APR 20 2026
CAZ128-130-133-136-139-220015-
/O.CON.KSTO.WS.W.0004.260421T0900Z-260423T0000Z/
LASSEN VOLCANIC NP-SIERRA (TEHAMA-PLUMAS) ABOVE 3000 FT-SIERRA
(SIERRA-PLACER) ABOVE 5000 FT-SIERRA (EL DORADO-AMADOR) ABOVE
5000 FT-SIERRA (CAL-TUO) ABOVE 5000 FT-
INCLUDING THE CITIES OF LASSEN NATIONAL PARK, BLUE CANYON,
KINGVALE, DONNER PEAK, MINERAL, QUINCY, TWAIN HARTE, ARNOLD, AND
CARSON PASS
211 PM PDT MON APR 20 2026
...WINTER STORM WARNING REMAINS IN EFFECT FROM 2 AM TUESDAY TO 5 PM
PDT WEDNESDAY...
* WHAT...HEAVY SNOW LIKELY ABOVE 5000 FEET. TOTAL SNOW ACCUMULATIONS
OF UP TO 12 TO 18 INCHES, WITH UP TO 2 FEET AT THE HIGHEST PEAKS.
MINOR ACCUMULATIONS OF UP TO 2 INCHES POSSIBLE DOWN TO 4500 FEET.
SOUTHWEST WINDS COULD GUST AS HIGH AS 50 MPH.
* WHERE...SIERRA (EL DORADO-AMADOR) ABOVE 5000 FT, LASSEN VOLCANIC
NP, SIERRA (CAL-TUO) ABOVE 5000 FT, SIERRA (SIERRA-PLACER) ABOVE
5000 FT, AND SIERRA (TEHAMA-PLUMAS) ABOVE 3000 FT COUNTIES.
* WHEN...FROM 2 AM TUESDAY TO 5 PM PDT WEDNESDAY.
* IMPACTS...TRAVEL COULD BE VERY DIFFICULT. THE HAZARDOUS CONDITIONS
COULD IMPACT THE TUESDAY AND WEDNESDAY COMMUTES.
* ADDITIONAL DETAILS...SNOW LEVELS INITIALLY 6000 TO 7000 FEET
TONIGHT, LOWERING TO 5500 TO 6500 FEET TUESDAY, AND DOWN TO 4500
TO 5500 FEET WEDNESDAY. HEAVIEST SNOWFALL EXPECTED TUESDAY
AFTERNOON AND EVENING WITH SNOWFALL RATES OF 1 TO 2 INCHES PER
HOUR.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
CHECK THE LATEST ROAD CONDITIONS FROM CALTRANS ONLINE AT
QUICKMAP.DOT.CA.GOV OR DIAL 5 1 1.
FOR MORE INFORMATION, VISIT US AT WWW.WEATHER.GOV/STO/
FORREST
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