Alert archive / California / Areal Flood Advisories in 2012
Areal Flood Advisory 14, NWS Eureka, CA
NWS Eureka, CA issued this areal flood advisory at Dec 2, 2012, 10:45 AM PST for 4 counties in California. It was in force for 4 hr.
The area
The counties it named.
The facts
- Issued
- Dec 2, 2012, 10:45 AM PST (18:45 UTC)
- Expired
- Dec 2, 2012, 2:45 PM PST
- In force
- 4 hr
- Issued by
- NWS Eureka, CA
- Area
- Storm-based polygon
Counties Del Norte County, CA, Humboldt County, CA, Mendocino County, CA, Trinity County, CA
The radar
The Eureka (Bunker Hill) radar (KBHX), 60 km from the middle of the area, began a volume at 18:45 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, 6.8 hours before the alert went out and 204 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 advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Eureka, CA wrote its last area forecast discussion before this areal flood advisory went out at Dec 2, 10:00 AM PST, 45 minutes earlier.
Area forecast discussion, Dec 2, 10:00 AM PST, 45 minutes before
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</html>Hazardous weather outlook, Dec 2, 5:36 AM PST, 5 hours 9 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE EUREKA CA 536 AM PST SUN DEC 2 2012 CAZ001>004-076-031345- REDWOOD COAST-MENDOCINO COAST-NORTH COAST INTERIOR- UPPER TRINITY RIVER-MENDOCINO INTERIOR- 536 AM PST SUN DEC 2 2012 ...FLOOD WATCH IN EFFECT UNTIL NOON PST TODAY... THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHWEST CALIFORNIA. HEAVY RAIN WILL TAPER OFF FROM NORTHWEST TO SOUTHEAST THIS MORNING WITH SUBSIDING WINDS. FLOODING PROBLEMS WILL PERSIST ON MANY AREA ROADS TODAY WITH CRESTING ON THE LARGER RIVERS NOT EXPECTED UNTIL LATER TODAY OR TONIGHT. ROADWAYS ACROSS HIGHER TERRAIN HAVE BEEN IMPACTED BY MUD AND ROCK SLIDES IN SOME AREAS. FOR INFORMATION ABOUT ROAD CONDITIONS CALL 1 800 GAS ROAD. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY. ANOTHER WET STORM SYSTEM WILL ARRIVE MONDAY NIGHT WITH A PERIOD OF MODERATE TO HEAVY RAIN TUESDAY. 1 TO 3 INCHES OF RAINFALL IS LIKELY BUT THE HEAVIER AMOUNTS WILL BE CONFINED TO MAINLY NORTHERN HUMBOLDT AND DEL NORTE COUNTIES. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. FOR FURTHER DETAILS PLEASE REFER TO NOAA WEATHER RADIO OR WEATHER.GOV/EUREKA.
The office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 1, 7:11 PM PST | Areal Flood Warning | EKA | Del Norte, Humboldt | 12 hr |
| Dec 1, 8:44 PM PST | Areal Flood Warning | EKA | Mendocino | 10 hr |
| Dec 1, 8:49 PM PST | Areal Flood Warning | EKA | Mendocino | 10 hr |
| Dec 1, 11:42 PM PST | Areal Flood Advisory | EKA | Del Norte, Humboldt, Trinity | 8 hr |
| Dec 1, 11:47 PM PST | Areal Flood Advisory | EKA | Mendocino | 12 hr |
| Dec 2, 3:04 AM PST | Gale Watch | EKA | 24 hr | |
| Dec 2, 3:04 AM PST | Small Craft Advisory | EKA | 12 hr | |
| Dec 2, 6:52 AM PST | Areal Flood Warning | EKA | Del Norte, Humboldt | 3 hr |
| Dec 2, 6:56 AM PST | Areal Flood Warning | EKA | Mendocino | 3 hr |
| Dec 2, 6:58 AM PST | Areal Flood Warning | EKA | Mendocino | 3 hr |
| Dec 2, 9:40 AM PST | River Flood Warning | EKA | Humboldt | 5 hr |
| Dec 2, 2:46 PM PST | Areal Flood Advisory | EKA | Del Norte, Humboldt, Mendocino, Trinity | 3 hr |
Nearby
Areal Flood Advisories in California, 2012Every areal flood advisory 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.