Alert archive / California / Severe Thunderstorm Warnings in 2006
Severe Thunderstorm Warning 4, NWS Sacramento, CA
NWS Sacramento, CA issued this severe thunderstorm warning at Feb 28, 2006, 3:47 PM PST for San Joaquin County, California. It was in force for 36 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Feb 28, 2006, 3:47 PM PST (23:47 UTC)
- Expired
- Feb 28, 2006, 4:23 PM PST
- In force
- 36 min
- Issued by
- NWS Sacramento, CA
- Area
- Counties, with a storm outline in the text
County San Joaquin County, CA
The radar
The Sacramento radar (KDAX), 72 km from the middle of the area, began a volume at 23:50 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Oakland, CA (KOAK), launched 12:00Z, 11.8 hours before the alert went out and 85 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 92 J/kg
- Mixed-layer CIN
- -5 J/kg
- Mixed-layer LCL
- 763 m above ground
- 0-6 km bulk shear
- 79 kt
- 0-1 km storm-relative helicity
- -109 m²/s²
- 0-3 km storm-relative helicity
- -39 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.4
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, 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 this severe thunderstorm warning went out at Feb 28, 3:30 PM PST, 17 minutes earlier.
Area forecast discussion, Feb 28, 3:30 PM PST, 17 minutes before
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HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SACRAMENTO CA 700 AM PST TUE FEB 28 2006 CAZ013>019-063-064-066>069-011500- 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 TUE FEB 28 2006 THIS HAZARDOUS WEATHER OUTLOOK IS FOR INTERIOR NORTHERN CALIFORNIA. .DAY ONE...TODAY A COLD AND UNSTABLE AIR MASS WILL MOVE OVER THE INTERIOR OF NORTHERN CALIFORNIA TODAY. THIS WILL CAUSE NUMEROUS SHOWERS AND SCATTERED THUNDERSTORMS...BUT PRECIPITATION AMOUNTS WILL GENERALLY BE MUCH LESS THAN YESTERDAY...AND THERE WILL BE LESS RUNOFF. SNOW LEVELS WILL LOWER TO AROUND 3000 FEET WHICH WILL ALSO REDUCE RUNOFF. * WINTER STORM WARNING.......SEE WWUS46 KSTO - WSWSTO FOR DETAILS * * WINTER WEATHER ADVISORY....SEE WWUS46 KSTO - WSWSTO FOR DETAILS * .DAYS TWO THROUGH SEVEN... WEDNESDAY THROUGH MONDAY A COLD AND UNSETTLED WEATHER PATTERN WILL CONTINUE OVER THE INTERIOR OF NORTHERN CALIFORNIA. THERE MAY BE SEVERAL PERIODS OF SIGNIFICANT SNOWFALL OVER THE MOUNTAINS WEDNESDAY NIGHT AND INTO FRIDAY...AND AGAIN SUNDAY AND MONDAY. STRONG GUSTY WINDS ARE POSSIBLE WEDNESDAY NIGHT IN THE CENTRAL VALLEY AND OVER THE MOUNTAINS. .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
In the hours before
Local storm report, Feb 28, 12:39 PM PST, 3 hours 8 minutes before
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</html>The office that day
Everything else NWS Sacramento, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 27, 8:38 PM PST | Severe Thunderstorm Warning | STO | El Dorado, Nevada, Placer, Sacramento, San Joaquin, Solano and 3 more | 49 min |
| Feb 28, 9:15 AM PST | Winter Weather Advisory | STO | 11 hr | |
| Feb 28, 9:30 AM PST | Tornado Warning | STO | Solano | 30 min |
| Feb 28, 9:58 AM PST | Tornado Warning | STO | Sacramento, Solano, Yolo | 30 min |
| Feb 28, 11:21 AM PST | Severe Thunderstorm Warning | STO | Sacramento | 23 min |
| Feb 28, 2:17 PM PST | Winter Storm Watch | STO | 13 hr | |
| Feb 28, 3:46 PM PST | Severe Thunderstorm Warning | STO | El Dorado, Sacramento | 29 min |
Nearby
Severe Thunderstorm Warnings in California, 2006Every severe thunderstorm warning in 2006
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.