Alert archive / California / Flash Flood Warnings in 2016
Flash Flood Warning 5, NWS San Francisco Bay Area, CA
NWS San Francisco Bay Area, CA issued this flash flood warning at Mar 5, 2016, 10:50 PM PST for Sonoma 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, 10:50 PM PST (06:50 UTC)
- Expired
- Mar 6, 2016, 2:45 AM PST
- In force
- 4 hr
- Issued by
- NWS San Francisco Bay Area, CA
- Area
- Storm-based polygon
- Flood severity
- None
County Sonoma County, CA
The radar
The Sacramento radar (KDAX), 87 km from the middle of the area, began a volume at 06:50 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, 6.8 hours before the alert went out and 74 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.
036
WGUS56 KMTR 060650
FFWMTR
CAC097-061045-
/O.NEW.KMTR.FF.W.0005.160306T0650Z-160306T1045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN FRANCISCO CA
1050 PM PST SAT MAR 5 2016
THE NATIONAL WEATHER SERVICE IN THE SAN FRANCISCO BAY AREA HAS ISSUED
A
* FLASH FLOOD WARNING FOR...
SOUTHEASTERN SONOMA COUNTY IN NORTHERN CALIFORNIA...
* UNTIL 245 AM PST
* AT 1046 PM PST...RIVER GAUGE REPORTS INDICATED THE WILLOW BROOK AT
PENNGROVE PARK HAD EXCEEDED FLOOD STAGE. FLASH FLOODING IS
EXPECTED TO CONTINUE ALONG THE WILLOW BROOK IN NORTHERN PETALUMA
FOR THE NEXT TWO TO FOUR HOURS.
* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
NORTHERN PETALUMA.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MOVE TO HIGHER GROUND NOW. DO NOT ATTEMPT TO CROSS FLOODED ROADWAYS
WITH YOUR AUTOMOBILE. TURN AROUND...DON'T DROWN.
&&
LAT...LON 3832 12263 3827 12261 3826 12266 3830 12269
$$
DYKEMA1 follow-up statement
772 WGUS76 KMTR 061025 FFSMTR FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SAN FRANCISCO CA 225 AM PST SUN MAR 6 2016 CAC097-061033- /O.CAN.KMTR.FF.W.0005.000000T0000Z-160306T1045Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SONOMA CA- 225 AM PST SUN MAR 6 2016 ...THE FLASH FLOOD WARNING FOR SOUTHEASTERN SONOMA COUNTY IS CANCELLED... THE WILLOW BROOK AT PENNGROVE PARK IN SONOMA COUNTY HAS FALLEN BELOW FLOOD STAGE. HEAVY RAIN IS NO LONGER EXPECTED. THEREFORE...THE FLASH FLOOD WARNING HAS BEEN CANCELLED. PLEASE CONTINUE TO HEED ALL ROAD CLOSURES. LAT...LON 3832 12263 3827 12261 3826 12266 3830 12269 $$
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, 10:41 PM PST | Flash Flood Warning | MTR | Alameda | 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.