Alert archive / California / Flash Flood Warnings in 2014
Flash Flood Warning 2, NWS San Francisco Bay Area, CA
NWS San Francisco Bay Area, CA issued this flash flood warning at Feb 8, 2014, 1:51 PM PST for Sonoma County, California. It was in force for 6 hr. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Feb 8, 2014, 1:51 PM PST (21:51 UTC)
- Expired
- Feb 8, 2014, 7:45 PM PST
- In force
- 6 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 21:51 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Feb 8, 2:31 PM PST | FLASH FLOOD | Rohnert Park, CA | VEHICLE STUCK IN MUD AND WATER. PARTY UNABLE TO EXIT VEHICLE. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Oakland, CA (KOAK), launched 12:00Z, 9.9 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 577 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- 344 m²/s²
- 0-3 km storm-relative helicity
- 368 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
610
WGUS56 KMTR 082151
FFWMTR
CAC097-090345-
/O.NEW.KMTR.FF.W.0002.140208T2151Z-140209T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN FRANCISCO CA
151 PM PST SAT FEB 8 2014
THE NATIONAL WEATHER SERVICE IN THE SAN FRANCISCO BAY AREA HAS
ISSUED A
* FLASH FLOOD WARNING FOR...
SONOMA COUNTY IN WESTERN CALIFORNIA...
THIS INCLUDES THE CITIES OF...ROHNERT PARK...PETALUMA...
* UNTIL 745 PM PST.
* AT 140 PM PST...NWS DOPPLER RADAR AND AUTOMATED RAIN GAGES
INDICATED LOCALLY MODERATE TO HEAVY RAIN...AND SOME STREAM GAGES
INDICATED LOCALIZED FLOODING.
* LOCATIONS IN THE WARNING INCLUDE THE WESTERN PORTION OF THE LAGUNA
DE SANTA ROSA AND WESTERN ROHNERT PARK...LOWERMOST MARK WEST AND
WINDSOR CREEKS...AND THE PETALUMA AREA...PARTICULARLY ON THE EAST
SIDE ON PETALUMA AND THE PENNGROVE PARK AREA.
A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS
IMMINENT.
RUNOFF FROM HEAVY RAINFALL WILL CAUSE LOCALIZED FLOODING OF SMALL
CREEKS AND STREAMS AS WELL AS ROADWAYS...UNDERPASSES AND OTHER LOW
LYING SPOTS. DO NOT ATTEMPT TO CROSS SWIFTLY FLOWING WATER OR WATER
OF UNKNOWN DEPTH. TURN AROUND...DONT DROWN.
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.
TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE.
LAT...LON 3819 12255 3838 12283 3850 12287 3853 12279
3834 12266 3813 12242 3812 12248
$$
SIMS/STRUDLEY1 follow-up statement
954
WGUS76 KMTR 090231
FFSMTR
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN FRANCISCO CA
631 PM PST SAT FEB 8 2014
CAC097-090330-
/O.CAN.KMTR.FF.W.0002.000000T0000Z-140209T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SONOMA CA-
631 PM PST SAT FEB 8 2014
...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR SONOMA COUNTY...
RAIN RATES HAD DECREASED ACROSS THE NORTH BAY BY EARLY SATURDAY
EVENING. MAINLY LIGHT...TO LOCALLY MODERATE...RAINFALL WAS BEING
OBSERVED. IN ADDITION...STREAM GAGES HAD INDICATED THAT STREAMS HAD
FALLEN BELOW FLOOD STAGE AND WERE CONTINUING TO RECEDE.
THEREFORE...THE FLASH FLOOD WARNING FOR PORTIONS OF SONOMA COUNTY
HAS BEEN CANCELLED.
SATELLITE IMAGERY SHOWS AN AREA OF ENHANCED RAINFALL
OFFSHORE...APPROACHING THE NORTHERN CALIFORNIA COAST. AS THIS AREA
OF ENHANCED RAINFALL MOVES INLAND LATER THIS EVENING...RAIN RATES
WILL ONCE AGAIN INCREASE ACROSS THE NORTH BAY. PERIODS OF HEAVY RAIN
ARE POSSIBLE FROM LATE SATURDAY EVENING THROUGH SUNDAY MORNING.
HEAVY RAIN WILL RESULT IN RENEWED RISES ON SMALL STREAMS AND CREEKS
BEGINNING LATER TONIGHT. IF HEAVY RAIN OCCURS...ADDITIONAL URBAN AND
SMALL STREAM FLOODING IS POSSIBLE LATER TONIGHT AND INTO SUNDAY
MORNING. NORTH BAY RESIDENTS SHOULD CONTINUE TO MONITOR THE LATEST
WEATHER REPORTS AND BE PREPARED FOR MORE HEAVY RAIN AND POSSIBLE
FLOODING LATER TONIGHT AND INTO SUNDAY MORNING.
LAT...LON 3819 12255 3838 12283 3850 12287 3853 12279
3834 12266 3813 12242 3812 12248
$$
DYKEMAThe office that day
Everything else NWS San Francisco Bay Area, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 8, 4:53 AM PST | Areal Flood Advisory | MTR | Marin | 3 hr |
| Feb 8, 7:45 AM PST | Areal Flood Advisory | MTR | Marin, Sonoma | 4 hr |
| Feb 8, 11:43 AM PST | Areal Flood Advisory | MTR | Marin, Sonoma | 4 hr |
| Feb 8, 1:40 PM PST | Flash Flood Warning | MTR | Sonoma | 6 hr |
| Feb 8, 2:34 PM PST | Small Craft Advisory | MTR | 10 hr |
Nearby
Flash Flood Warnings in California, 2014Every flash flood warning in 2014
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.