Alert archive / California / Areal Flood Warnings in 2012
Areal Flood Warning 2, NWS Sacramento, CA
NWS Sacramento, CA issued this areal flood warning at Nov 30, 2012, 9:54 AM PST for Shasta 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
- Nov 30, 2012, 9:54 AM PST (17:54 UTC)
- Expired
- Nov 30, 2012, 3:45 PM PST
- In force
- 6 hr
- Issued by
- NWS Sacramento, CA
- Area
- Storm-based polygon
- Flood severity
- None
County Shasta County, CA
The radar
The Beale AFB radar (KBBX), 145 km from the middle of the area, began a volume at 17:54 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, 5.9 hours before the alert went out and 189 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 754 m above ground
- 0-6 km bulk shear
- 83 kt
- 0-1 km storm-relative helicity
- 196 m²/s²
- 0-3 km storm-relative helicity
- 255 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 Nov 30, 5:09 AM PST, 4 hours 45 minutes earlier.
Area forecast discussion, Nov 30, 5:09 AM PST, 4 hours 45 minutes before
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</html>Hazardous weather outlook, Nov 30, 7:00 AM PST, 2 hours 54 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SACRAMENTO CA 700 AM PST FRI NOV 30 2012 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 FRI NOV 30 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR INTERIOR NORTHERN CALIFORNIA. .DAY ONE...TODAY A STRONG PACIFIC FRONTAL SYSTEM MOVING THROUGH NORTHERN CALIFORNIA WILL BRING PERIODS OF HEAVY RAIN...WIND AND HIGH ELEVATION SNOW. THE FRONT WILL MOVE INTO THE SIERRA CASCADE RANGE LATER THIS MORNING WITH SHOWERS CONTINUING ELSEWHERE THROUGH TODAY. MORE RAINFALL IS EXPECTED OVER SHASTA COUNTY TONIGHT. * WINTER STORM WARNING.......SEE WWUS46 KSTO - WSWSTO FOR DETAILS * * FLOOD WATCH................SEE WGUS66 KSTO - FFASTO FOR DETAILS * * FLOOD STATEMENT............SEE WGUS86 KSTO - FLSSTO FOR DETAILS * * WIND ADVISORY..............SEE WWUS76 KSTO - NPWSTO FOR DETAILS * .DAYS TWO THROUGH SEVEN... SATURDAY THROUGH THURSDAY THE THIRD AND MOST POWERFUL FRONTAL SYSTEM IN THE CURRENT SERIES IS EXPECTED TO MOVE INTO NORTHERN CALIFORNIA SATURDAY AFTERNOON AND NIGHT. THIS SYSTEM WILL BRING PERIODS OF HEAVY RAIN AND STRONG WINDS THROUGH SUNDAY AFTERNOON. DRIER WEATHER IS EXPECTED MOST AREAS MONDAY WITH ANOTHER ROUND OF RAINFALL EXPECTED TUESDAY AND WEDNESDAY. * FLOOD WATCH................SEE WGUS66 KSTO - FFASTO FOR DETAILS * * WIND ADVISORY..............SEE WWUS76 KSTO - NPWSTO 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
In the hours before
Local storm report, Nov 30, 7:49 AM PST, 2 hours 5 minutes before
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</html>Local storm report, Nov 30, 7:50 AM PST, 2 hours 4 minutes before
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</html>Local storm report, Nov 30, 7:52 AM PST, 2 hours 2 minutes before
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</html>Local storm report, Nov 30, 8:26 AM PST, 1 hour 28 minutes before
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</html>Local storm report, Nov 30, 8:27 AM PST, 1 hour 27 minutes before
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</html>Local storm report, Nov 30, 8:29 AM PST, 1 hour 25 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 |
|---|---|---|---|---|
| Nov 30, 5:29 AM PST | Areal Flood Advisory | STO | Alpine, Amador, Butte, Calaveras, Colusa, El Dorado and 14 more | 12 hr |
| Nov 30, 7:06 AM PST | Areal Flood Advisory | STO | Shasta | 6 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.