Alert archive / California / Areal Flood Warnings in 2012
Areal Flood Warning 3, NWS Sacramento, CA
NWS Sacramento, CA issued this areal flood warning at Dec 2, 2012, 4:23 AM PST for Shasta County, Tehama County, California. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Dec 2, 2012, 4:23 AM PST (12:23 UTC)
- Expired
- Dec 2, 2012, 10:06 AM PST
- In force
- 6 hr
- Issued by
- NWS Sacramento, CA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Shasta County, CA, Tehama County, CA
The radar
The Beale AFB radar (KBBX), 114 km from the middle of the area, began a volume at 12:24 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
Medford/Jackson, OR (KMFR), launched 12:00Z, 0.4 hours before the alert went out and 221 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
- 8 J/kg
- Mixed-layer CIN
- -20 J/kg
- Mixed-layer LCL
- 838 m above ground
- 0-6 km bulk shear
- 85 kt
- 0-1 km storm-relative helicity
- 65 m²/s²
- 0-3 km storm-relative helicity
- 110 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this areal flood 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 areal flood warning went out at Dec 1, 10:58 PM PST, 5 hours 25 minutes earlier.
Area forecast discussion, Dec 1, 10:58 PM PST, 5 hours 25 minutes before
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</html>Hazardous weather outlook, Dec 1, 7:00 AM PST, 21 hours 23 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SACRAMENTO CA 700 AM PST SAT DEC 1 2012 CAZ013>019-063-064-066>069-021500- 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 SAT DEC 1 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR INTERIOR NORTHERN CALIFORNIA. .DAY ONE...TODAY A POWERFUL FRONTAL SYSTEM IS EXPECTED TO MOVE INTO NORTHERN CALIFORNIA LATE THIS AFTERNOON AND NIGHT. THIS SYSTEM WILL BRING PERIODS OF HEAVY RAIN AND STRONG WINDS THROUGH SUNDAY AFTERNOON. * FLOOD WATCH................SEE WGUS66 KSTO - FFASTO FOR DETAILS * * WIND ADVISORY..............SEE WWUS76 KSTO - NPWSTO FOR DETAILS * .DAYS TWO THROUGH SEVEN... SUNDAY THROUGH FRIDAY THE STRONG FRONTAL SYSTEM SHOULD BE EXITING NORTHERN CALIFORNIA BY SUNDAY AFTERNOON. RAINFALL SHOULD DECREASE BY AFTERNOON WITH LIGHTER WINDS. WITH LOWERING SNOW LEVELS SUNDAY AFTERNOON...SIERRA CASCADE PASS LEVELS MAY START TO PICK UP SOME SNOWFALL. A FEW TO SEVERAL INCHES OF SNOWFALL WILL BE POSSIBLE AT PASS LEVELS SUNDAY EVENING BEFORE THE PRECIPITATION ENDS. * FLOOD WATCH................SEE WGUS66 KSTO - FFASTO FOR DETAILS * * WIND ADVISORY..............SEE WWUS76 KSTO - NPWSTO FOR DETAILS * * SPECIAL WEATHER STATEMENT..SEE WWUS86 KSTO - SPSSTO FOR DETAILS * .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
The office that day
Everything else NWS Sacramento, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 1, 5:39 PM PST | Special Weather Statement | STO | Sutter | 51 min |
| Dec 1, 10:38 PM PST | Areal Flood Advisory | STO | Butte, Colusa, Glenn, Lake, Lassen, Nevada and 8 more | 12 hr |
| Dec 1, 10:46 PM PST | Areal Flood Advisory | STO | Butte, Colusa, Glenn, Lake, Lassen, Nevada and 8 more | 12 hr |
| Dec 2, 6:22 AM PST | Areal Flood Advisory | STO | Alpine, Amador, Calaveras, El Dorado, Lake, Nevada and 9 more | 25 hr |
| Dec 2, 6:46 AM PST | Flood Watch | STO | 4 hr | |
| Dec 2, 9:06 AM PST | River Flood Warning | STO | Tehama | 18 hr |
| Dec 2, 10:01 AM PST | Areal Flood Warning | STO | Butte, Colusa, Glenn, Lake, Nevada, Placer and 7 more | 21 hr |
Nearby
Areal Flood Warnings in California, 2012Every areal flood warning in 2012
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.