Alert archive / California / Severe Thunderstorm Warnings in 2005
Severe Thunderstorm Warning 8, NWS Sacramento, CA
NWS Sacramento, CA issued this severe thunderstorm warning at Feb 21, 2005, 4:08 PM PST for Solano County, California. It was in force for 44 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 21, 2005, 4:08 PM PST (00:08 UTC)
- Expired
- Feb 21, 2005, 4:52 PM PST
- In force
- 44 min
- Issued by
- NWS Sacramento, CA
- Area
- Counties, with a storm outline in the text
County Solano County, CA
The nearest sounding before it
Oakland, CA (KOAK), launched 00:00Z, 0.1 hours before the alert went out and 64 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
- 1 J/kg
- Mixed-layer CIN
- -15 J/kg
- Mixed-layer LCL
- 1418 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 243 m²/s²
- 0-3 km storm-relative helicity
- 284 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 21, 9:40 AM PST, 6 hours 28 minutes earlier.
Area forecast discussion, Feb 21, 9:40 AM PST, 6 hours 28 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SACRAMENTO CA 940 AM PST MON FEB 21 2005 .DISCUSSION... IR AND WATER VAPOR IMAGERY SHOW OCCLUDED FRONT AND MID LEVEL DRY SLOT ROTATING INLAND ROUGHLY FROM SFO SWD. MAIN PROBLEM TODAY WILL BE CONVECTION/THUNDER DEVELOPING IN THE MOIST AND UNSTABLE AIR MASS...ESPECIALLY WITH DRY SLOT PROVIDING BREAKS IN THE CLOUDS RESULTING IN SURFACE HEATING. 12Z MON ETA20 SHOWS INSTABILITY AXIS FROM THE SAN JOAQUIN VLY NWD INTO THE CENTRAL SAC VLY. BULLS-EYE OF CAPE AND LI FORECAST TO BE OVER OUR NRN SAN JOAQUIN VLY WITH VALUES OVER 900 J/KG AND -4 LI THIS AFTN. REX BLOCK OFF THE CA COAST FORECAST TO MOVE INLAND LATE TUE/WED... BUT VORT MAX NEAR 33N/125W SHOULD ROTATE INLAND OVER CENTRAL CA COAST THIS AFTN AND OVER THE SAN JOAQUIN VLY THIS EVENING. WILL LIKELY KEEP HIGHEST POPS OVER OUR SRN ZONES DUE TO THESE FEATURES. FOR THE SIERNEV...PCPN WILL BE MORE IN THE FORM OF SCATTERED SHOWERS WITH MAINLY LIGHT ACCUMULATIONS PER WS-ETA QPF FORECAST...AND WILL DROP SNOW ADVSRY THIS MORNING. TUE AFTN STILL FORECAST TO BE UNSTABLE OVER OUR SRN ZONES AS WELL...ALTHO NOT QUITE AS UNSTABLE AS THIS AFTN. WILL LIKELY ADD CONVECTIVE CHANCES TO THE SRN PORTION OF OUR CWA FOR TUE AFTN IN THE THIS AFTERNOONS FORECAST PACKAGE. OMEGA-REX BLOCK PATTERN IS FORECAST TO DEVELOP OVER THE WRN STATES ON WED...AND CONTINUE INTO FRI. THIS WILL MEAN KEEPING SOME WRAP AROUND PCPN CHANCES GOING OVER THE SIERNEV. ON FRI AND SAT...WEAK WESTERLIES ARE FORECAST TO DEVELOP AS A WEAK TROF APPROACHES THE PAC NW. MOIST UPSLOPE FLOW FORECAST FOR THE SIERNEV WARRANTS KEEPING AT LEAST A CHANCE OF LIGHT PCPN GOING...AND MAY ADD SOME POPS TO THE FORECASTS FOR THE AFTN PACKAGE. && .STO WATCHES/WARNINGS/ADVISORIES...NONE. &&
Hazardous weather outlook, Feb 21, 7:00 AM PST, 9 hours 8 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SACRAMENTO CA 700 AM PST MON FEB 21 2005 CAZ013>019-063-064-066>069-221500- 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 MON FEB 21 2005 THIS HAZARDOUS WEATHER OUTLOOK IS FOR INTERIOR NORTHERN CALIFORNIA. .DAY ONE...TODAY SHOWERS WITH BRIEF MODERATE TO HEAVY PRECIPITATION WILL CONTINUE THROUGHOUT THE DAY. SNOW LEVELS ARE AROUND 6000 FEET TODAY. A SNOW ADVISORY CONTINUES FOR THE NORTHERN SIERRA NEVADA. ISOLATED THUNDERSTORMS ARE POSSIBLE THIS AFTERNOON FROM CHICO SOUTH. * SNOW ADVISORY..............SEE WWUS46 KSTO - WSWSTO FOR DETAILS * .DAYS TWO THROUGH SEVEN... TUESDAY THROUGH SUNDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME EXCEPT FOR A SLIGHT CHANCE OF THUNDERSTORMS ON WEDNESDAY. .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 HS
Nearby
Severe Thunderstorm Warnings in California, 2005Every severe thunderstorm warning in 2005
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.