Clearing skies over an unstable airmass left in the wake of a moderately cold winter storm resulted in an environment favorable for convective activity.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS STO wrote it up.
Clearing skies over an unstable airmass left in the wake of a moderately cold winter storm resulted in an environment favorable for convective activity.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Sacramento, CA wrote its last area forecast discussion before the first event at Feb 22, 4:30 PM PST, 0 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SACRAMENTO CA 430 PM PST THU FEB 22 2007 .DISCUSSION... PACIFIC FRONTAL SYSTEM NOW HUNG UP IN THE SIERRA AND CONTINUING SLOWLY EASTWARD. WEATHER ALONG THE FRONT HAS BEEN MAINLY STRATIFIED PRECIP WITH SNOW LEVELS AS LOW AS 1500 FEET THIS MORNING. BEHIND THE FRONT HAS BEEN A DIFFERENT STORY. THUNDERSTORMS HAVE DEVELOPED AS ANTICIPATED IN THE UNSTABLE AIRMASS BEHIND THE FRONT. BUFKIT SHOWED LI BETWEEN -0.7 AND -1.5 AND CAPES OF 325 IN THE SAC VALLEY. WE HAVE HAD MANY REPORTS OF SMALL HAIL ACROSS THE SACRAMENTO VALLEY...EVEN INTO THE NRN SAN JOAQUIN VALLEY. THE HEAVIEST SNOWFALL WILL CONTINUE IN THE MOUNTAINS AND FOOTHILLS TONIGHT UNTIL THE UPPER LEVEL TROUGH PASSES NRN CAL BETWEEN 00Z AND 03Z. THEN EXPECT ONLY LIGHT SNOW WITH MINIMAL ACCUMULATIONS. WINTER WEATHER ADVISORIES AND WARNINGS ARE EXTENDED OUT UNTIL MIDNIGHT...EXCEPT SIERRA FOOTHILLS EXPIRE AT 1000 PM. GFS 18Z MODEL SHOWS 500MB TEMPS DROPPING TO MINUS 33 DEGREES C BEHIND THIS VORT...2 DEGREES COLDER THAN THE 12Z RUN. WINDS HAVE BEEN GUSTING INTO THE UPPER 20S MOST OF THE DAY...STAYING BELOW ADVISORY CRITERIA. SHOULD EXPECT THE WINDS TO GUST TO 50 MPH IN THE HIGHER TERRAIN TONIGHT. WINDS WILL WEAKEN TOMORROW AS THE FRONTAL SYSTEMS MAKES ITS WAY EASTWARD. FRIDAY AFTERNOON AND INTO SATURDAY...TRANSITORY RIDGING WILL GIVE US A BRIEF BREAK IN PRECIP BEFORE THE NEXT SYSTEM PROGRESSES EAST INTO NRN CAL SATURDAY AFTERNOON. THIS SYSTEM AGAIN ORIGINATES FROM THE GULF OF ALASKA. HOWEVER...THE LONG WAVE PATTERN BECOMES MORE ZONAL AND KEEPS THE FRONTAL TRACK OVER NRN CAL UNTIL TUESDAY WHEN THE NEXT VORT MAX PUSHES THROUGH OUR CWA. THE RIDGE IS NOT VERY AMPLIFIED BEHIND THIS TROUGH...CLOUDS AND SHOWERY PRECIP WILL LINGER OVER NRN PORTION OF CWA AND SIERRA THROUGH WEDNESDAY NIGHT. THEN WE FINALLY SEE A DECANT BREAK IN PRECIP AND CLOUDINESS. JCLAPP && .AVIATION... SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS WITH SMALL HAIL FORMED IN THE POST-FRONTAL COLD AIR THIS AFTERNOON. VFR WITH CIG BKN040-060 AND ISOLATED IFR CIG IN SHRA AND LIFR CIG/VSBY SHSN ABV 2000 FEET. SFC WND SLY 10-15 KTS STRONGER NRN SAC VLY AND DELTA GUSTS 25-30 KTS EXPECTED TO DIMINISH BY 06Z. && .STO WATCHES/WARNINGS/ADVISORIES... WINTER STORM WARNING UNTIL MIDNIGHT PST TONIGHT FOR WEST SLOPE NORTHERN SIERRA NEVADA-WESTERN PLUMAS COUNTY/LASSEN PARK. WINTER WEATHER ADVISORY UNTIL MIDNIGHT PST TONIGHT FOR BURNEY BASIN / EASTERN SHASTA COUNTY-MOUNTAINS SOUTHWESTERN SHASTA COUNTY TO NORTHERN LAKE COUNTY-SHASTA LAKE AREA / NORTHERN SHASTA COUNTY. WINTER WEATHER ADVISORY UNTIL 10 PM PST THIS EVENING FOR MOTHERLODE-NORTHEAST FOOTHILLS/SACRAMENTO VALLEY. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SACRAMENTO CA 700 AM PST THU FEB 22 2007 CAZ013>019-063-064-066>069-231500- SHASTA LAKE AREA/NORTHERN SHASTA COUNTY- BURNEY BASIN/EASTERN SHASTA COUNTY-NORTHERN SACRAMENTO VALLEY- CENTRAL SACRAMENTO VALLEY-SOUTHERN SACRAMENTO VALLEY- CARQUINEZ STRAIT AND DELTA-NORTHERN SAN JOAQUIN VALLEY- MOUNTAINS SOUTHWESTERN SHASTA TO NORTHERN LAKE COUNTIES- CLEAR LAKE/SOUTHERN LAKE COUNTY-MOTHERLODE- EAST FOOTHILLS/NORTH SACRAMENTO VALLEY- WESTERN PLUMAS COUNTY/LASSEN PARK-WEST SLOPE NORTHERN SIERRA NEVADA- 700 AM PST THU FEB 22 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR INTERIOR NORTHERN CALIFORNIA. .DAY ONE...TODAY A PACIFIC STORM SYSTEM MOVING THROUGH NORTHERN CALIFORNIA IS BRINGING SNOW AND STRONG WINDS TO THE HIGHER ELEVATIONS TODAY. OVER A FOOT OF NEW SNOW IS POSSIBLE OVER THE HIGHER ELEVATIONS OF THE SIERRA NEVADA. THE SYSTEM WILL MOVE EAST OF THE AREA BY LATE TONIGHT. * WINTER STORM WARNING.......SEE WWUS46 KSTO - WSWSTO FOR DETAILS * * SNOW ADVISORY..............SEE WWUS46 KSTO - WSWSTO FOR DETAILS * .DAYS TWO THROUGH SEVEN... FRIDAY THROUGH WEDNESDAY SEVERAL WEATHER SYSTEMS ARE FORECAST TO MOVE THROUGH NORTHERN CALIFORNIA BETWEEN SATURDAY AND THE MIDDLE OF NEXT WEEK BRINGING RAIN AND MOUNTAIN SNOW. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS TO THEIR LOCAL NATIONAL WEATHER SERVICE OFFICE. THE LATEST WEATHER INFORMATION IS AVAILABLE ON THE INTERNET AT (LOWER CASE): HTTP://WWW.WRH.NOAA.GOV/STO
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SACRAMENTO CA 1137 AM PST THU FEB 22 2007 CAZ013>019-063-064-066>069-222145- SHASTA LAKE AREA / NORTHERN SHASTA COUNTY- BURNEY BASIN / EASTERN SHASTA COUNTY-NORTHERN SACRAMENTO VALLEY- CENTRAL SACRAMENTO VALLEY-SOUTHERN SACRAMENTO VALLEY- CARQUINEZ STRAIT AND DELTA-NORTHERN SAN JOAQUIN VALLEY- MOUNTAINS SOUTHWESTERN SHASTA COUNTY TO NORTHERN LAKE COUNTY- CLEAR LAKE/SOUTHERN LAKE COUNTY- NORTHEAST FOOTHILLS/SACRAMENTO VALLEY-MOTHERLODE- WESTERN PLUMAS COUNTY/LASSEN PARK- WEST SLOPE NORTHERN SIERRA NEVADA- 1137 AM PST THU FEB 22 2007 ...ISOLATED THUNDERSTORMS LIKELY THIS AFTERNOON AND EVENING... A STRONG PACIFIC STORM WILL MOVE THROUGH THE NORTHERN CALIFORNIA INTERIOR TODAY AND TONIGHT...BRINGING LOCALLY HEAVY RAIN AND MOUNTAIN SNOW. AFTER THE COLD FRONT MOVES THROUGH THE REGION...THE AIRMASS OVER THE AREA WILL BE VERY COLD AND UNSTABLE. THIS WILL CREATE THE POTENTIAL FOR ISOLATED THUNDERSTORMS TO DEVELOP AS BREAKS IN THE CLOUD COVER ALLOWS WARMING NEAR THE SURFACE. THUNDERSTORMS MAY DEVELOP OVER THE SACRAMENTO AND NORTHERN SAN JOAQUIN VALLEY...COASTAL MOUNTAINS...AND THE SIERRA FOOTHILLS...BY BY NOON AND PERSIST INTO THE EVENING HOURS. SOME OF THESE STORMS MAY MOVE INTO THE HIGHER TERRAIN OF THE SIERRA NEVADA MOUNTAINS AS THE CLOUDINESS CLEARS FROM THE WEST BEHIND THE FRONT. WINDS WILL SHIFT FROM THE SOUTH TO THE WEST WITH THE STRONGEST WINDS ALOFT. THESE THUNDERSTORMS MAY PRODUCE LOCALLY HEAVY RAIN...HAIL...GUSTY WINDS AND LIGHTNING. LOCAL ROAD FLOODING WILL BE POSSIBLE IN AREAS OF HEAVY RAIN...ESPECIALLY UNDER OVERPASSES AND IN LOW SPOTS WITH POOR DRAINAGE. STAY TUNED TO NOAA WEATHER RADIO...OR YOUR FAVORITE LOCAL NEWS SOURCE...FOR UPDATES ON THIS SITUATION. JCLAPP
The Beale AFB radar (KBBX), 63 km away, was scanning. The volume nearest the first event began at 00:30 UTC.
1 thunderstorm wind. Local standard time, as filed.
Moderately strong downdraft winds from a diminishing thunderstorm caused damage to a rural neighborhood of mobile homes. Damage to occupied homes included torn roofing and skirting material and loss of some small backyard items.|
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in California in 2007Every state in 2007This day in weather historyWarnings in California, February 2007
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 9809.