Alert archive / California / Areal Flood Warnings in 2012
Areal Flood Warning 4, NWS Sacramento, CA
NWS Sacramento, CA issued this areal flood warning at Dec 2, 2012, 10:01 AM PST for 13 counties in California. It was in force for 21 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, 10:01 AM PST (18:01 UTC)
- Expired
- Dec 3, 2012, 7:04 AM PST
- In force
- 21 hr
- Issued by
- NWS Sacramento, CA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Butte County, CA, Colusa County, CA, Glenn County, CA, Lake County, CA, Nevada County, CA, Placer County, CA, Plumas County, CA, Shasta County, CA, Sierra County, CA, Sutter County, CA, Tehama County, CA, Yolo County, CA, Yuba County, CA
The radar
The Beale AFB radar (KBBX), 1 km from the middle of the area, began a volume at 18:02 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
Reno, NV (KREV), launched 12:00Z, 6.0 hours before the alert went out and 293 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
- 1424 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 121 m²/s²
- 0-3 km storm-relative helicity
- 216 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 2, 8:16 AM PST, 1 hour 45 minutes earlier.
Area forecast discussion, Dec 2, 8:16 AM PST, 1 hour 45 minutes before
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</html>Hazardous weather outlook, Dec 2, 7:00 AM PST, 3 hours 1 minute before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SACRAMENTO CA 700 AM PST SUN DEC 2 2012 CAZ013>019-063-064-066>069-031500- 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 SUN DEC 2 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR INTERIOR NORTHERN CALIFORNIA. .DAY ONE...TODAY A STRONG PACIFIC FRONTAL SYSTEM DROPPING THROUGH NORTHERN CALIFORNIA IS BRINGING STRONG WINDS AND HEAVY RAIN. URBAN AND SMALL STREAM FLOODING WILL OCCUR IN MANY AREAS TODAY AS THE SYSTEM DROPS SOUTHWARD. IN ADDITION...THE SYSTEM WILL BRING PERIODS OF STRONG SOUTH WINDS. THIS WEATHER SYSTEM WILL SHIFT EAST OF THE AREA DURING THE NIGHT WITH CLEARING BY MONDAY MORNING. * FLOOD WARNING..............SEE WGUS46 KSTO - FLWSTO 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... MONDAY THROUGH SATURDAY FLOOD WATCHES CONTINUE FOR THE NORTHERN AND CENTRAL SACRAMENTO VALLEY AS LOCAL CREEKS DRAIN. OTHERWISE...NO SIGNIFICANT WEATHER IS EXPECTED. .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, Dec 2, 8:11 AM PST, 1 hour 50 minutes before
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</html>Local storm report, Dec 2, 8:17 AM PST, 1 hour 44 minutes before
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</html>Local storm report, Dec 2, 8:28 AM PST, 1 hour 33 minutes before
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</html>Local storm report, Dec 2, 8:34 AM PST, 1 hour 27 minutes before
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</html>Local storm report, Dec 2, 9:17 AM PST, 44 minutes before
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</html>Local storm report, Dec 2, 10:01 AM PST, 0 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 |
|---|---|---|---|---|
| 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, 4:23 AM PST | Areal Flood Warning | STO | Shasta, Tehama | 6 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 |
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.