Alert archive / California / Flash Flood Warnings in 2016
Flash Flood Warning 4, NWS San Francisco Bay Area, CA
NWS San Francisco Bay Area, CA issued this flash flood warning at Mar 5, 2016, 10:41 PM PST for Alameda County, California. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Mar 5, 2016, 10:41 PM PST (06:41 UTC)
- Expired
- Mar 6, 2016, 2:30 AM PST
- In force
- 4 hr
- Issued by
- NWS San Francisco Bay Area, CA
- Area
- Storm-based polygon
- Flood severity
- None
County Alameda County, CA
The radar
The San Francisco radar (KMUX), 55 km from the middle of the area, began a volume at 06:42 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
Oakland, CA (KOAK), launched 00:00Z, 6.7 hours before the alert went out and 15 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
- 31 J/kg
- Mixed-layer CIN
- -28 J/kg
- Mixed-layer LCL
- 748 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- 198 m²/s²
- 0-3 km storm-relative helicity
- 207 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
850
WGUS56 KMTR 060641
FFWMTR
CAC001-061030-
/O.NEW.KMTR.FF.W.0004.160306T0641Z-160306T1030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN FRANCISCO CA
1041 PM PST SAT MAR 5 2016
THE NATIONAL WEATHER SERVICE IN THE SAN FRANCISCO BAY AREA HAS ISSUED
A
* FLASH FLOOD WARNING FOR...
CENTRAL ALAMEDA COUNTY IN NORTHERN CALIFORNIA...
* UNTIL 230 AM PST
* AT 1037 PM PST...RIVER GAUGE REPORTS INDICATED THAT THE CASTRO
VALLEY CREEK AT HAYWARD HAD REACHED FLOOD STAGE AND WAS
CONTINUING TO RISE. FLASH FLOODING IS EXPECTED ALONG THE CREEK.
* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
AREAS NEAR CASTRO VALLEY CREEK IN HAYWARD.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MOVE TO HIGHER GROUND NOW. DO NOT ATTEMPT TO CROSS FLOODED ROADWAYS
IN YOUR AUTOMOBILE. TURN AROUND...DON'T DROWN.
&&
LAT...LON 3765 12207 3761 12205 3759 12211 3765 12213
$$
DYKEMA1 follow-up statement
309 WGUS76 KMTR 060726 FFSMTR FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SAN FRANCISCO CA 1126 PM PST SAT MAR 5 2016 CAC001-060735- /O.CAN.KMTR.FF.W.0004.000000T0000Z-160306T1030Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ ALAMEDA CA- 1126 PM PST SAT MAR 5 2016 ...THE FLASH FLOOD WARNING FOR CENTRAL ALAMEDA COUNTY IS CANCELLED... THE STREAM GAUGE ON CASTRO VALLEY CREEK AT HAYWARD HAS RECENTLY FALLEN BELOW FLOOD STAGE. IN ADDITION...HEAVY RAIN HAS ENDED. FLOODING IS NO LONGER EXPECTED TO POSE A THREAT. PLEASE CONTINUE TO HEED ALL ROAD CLOSURES. LAT...LON 3765 12207 3761 12205 3759 12211 3765 12213 $$
The office that day
Everything else NWS San Francisco Bay Area, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 5, 4:17 PM PST | Areal Flood Advisory | MTR | Alameda, Contra Costa, Marin, Monterey, Napa, San Benito and 5 more | 6 hr |
| Mar 5, 9:07 PM PST | Small Craft Advisory | MTR | 54 hr | |
| Mar 5, 9:59 PM PST | Flash Flood Warning | MTR | Napa | 3 hr |
| Mar 5, 10:14 PM PST | Flash Flood Watch | MTR | Alameda, Contra Costa, Marin, Monterey, Napa, San Benito and 4 more | 5 hr |
| Mar 5, 10:27 PM PST | Flash Flood Warning | MTR | Santa Cruz | 4 hr |
| Mar 5, 10:50 PM PST | Flash Flood Warning | MTR | Sonoma | 4 hr |
| Mar 5, 11:46 PM PST | Flash Flood Warning | MTR | Santa Cruz | 3 hr |
| Mar 6, 12:12 AM PST | Flash Flood Warning | MTR | Santa Cruz | 108 min |
| Mar 6, 2:24 AM PST | Gale Warning | MTR | 23 hr | |
| Mar 6, 2:24 AM PST | Small Craft Advisory | MTR | 13 hr | |
| Mar 6, 4:57 AM PST | Wind Advisory | MTR | Alameda, Contra Costa, Marin, Monterey, Napa, San Benito and 5 more | 23 hr |
| Mar 6, 5:16 AM PST | Flash Flood Watch | MTR | Alameda, Contra Costa, Marin, Monterey, Napa, San Benito and 5 more | 23 hr |
Nearby
Flash Flood Warnings in California, 2016Every flash flood warning in 2016
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.