Alert archive / California / Flash Flood Warnings in 2012
Flash Flood Warning 5, NWS San Francisco Bay Area, CA
NWS San Francisco Bay Area, CA issued this flash flood warning at Nov 30, 2012, 11:59 AM PST for Monterey County, California. It was in force for 3 hr. 2 reports 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
- Nov 30, 2012, 11:59 AM PST (19:59 UTC)
- Expired
- Nov 30, 2012, 2:30 PM PST
- In force
- 3 hr
- Issued by
- NWS San Francisco Bay Area, CA
- Area
- Storm-based polygon
- Flood severity
- None
County Monterey County, CA
The radar
The San Francisco radar (KMUX), 109 km from the middle of the area, began a volume at 20:00 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 |
|---|---|---|---|
| Nov 30, 11:59 AM PST | FLASH FLOOD | 6 Nw Pico Blanco Campgr, CA | SPOTTER REPORTS RAIN INTENSITY INCREASING AGAIN AND FLASH FLOODING CONTINUING TO IMPACT DRAINAGE CULVERTS. |
| Nov 30, 12:10 PM PST | HEAVY RAIN 8.03 | 5 Nnw Lucia, CA | 8.03 INCHES MEASURED AT MINING RIDGE RAWS SITE AT 3288 FT ELEVATION. 3.42 INCHES HAVE FALLEN IN THE PAST 3 HOURS. |
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, 8.0 hours before the alert went out and 177 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
- 60 J/kg
- Mixed-layer CIN
- -60 J/kg
- Mixed-layer LCL
- 551 m above ground
- 0-6 km bulk shear
- 67 kt
- 0-1 km storm-relative helicity
- 462 m²/s²
- 0-3 km storm-relative helicity
- 616 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
The text
As transmitted, in the capitals the NWS used until 2016.
548
WGUS56 KMTR 301959
FFWMTR
CAC053-302130-
/O.NEW.KMTR.FF.W.0005.121130T1959Z-121130T2130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN FRANCISCO CA
1159 AM PST FRI NOV 30 2012
THE NATIONAL WEATHER SERVICE IN THE SAN FRANCISCO BAY AREA HAS
ISSUED A
* FLASH FLOOD WARNING FOR...
MONTEREY COUNTY IN WESTERN CALIFORNIA...
THIS INCLUDES THE CITIES OF...TASSAJARA HOT SPRINGS...JAMESBURG...
BIG SUR VILLAGE...
* UNTIL 130 PM PST.
* AT 1154 AM PST...NWS DOPPLER RADAR AND AUTOMATED RAIN GAGES
INDICATED THAT HOURLY RAINFALL RATES OF 1 INCHES OR MORE ARE
CONTINUING OVER THE HIGH TERRAIN OF MONTEREY COUNTY. STORM TOTALS OF
5 TO 7 INCHES HAVE OCCURRED AND SPOTTERS INDICATE CONTINUED FLASH
FLOODING IN THE AREA.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO PICO BLANCO
CAMPGROUND AND ANDREW MOLERA STATE PARK
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.
IT IS IMPORTANT FOR CAMPERS AND HIKERS TO KNOW WHERE THEY ARE
RELATIVE TO CREEKS...STREAMS...OR RIVERS WHICH CAN BECOME DANGEROUS
IN HEAVY RAINS. BE PARTICULARLY AWARE IN HILLY TERRAIN WHERE MANY LOW
WATER CROSSINGS CAN QUICKLY BECOME KILLERS.
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 3601 12158 3614 12166 3620 12175 3623 12182
3632 12191 3634 12190 3636 12192 3648 12184
3629 12155 3603 12138 3602 12151 3601 12151
$$
JOHNSON2 follow-up statements
565
WGUS56 KMTR 302127
FFWMTR
CAC053-302230-
/O.EXT.KMTR.FF.W.0005.000000T0000Z-121130T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN FRANCISCO CA
127 PM PST FRI NOV 30 2012
THE NATIONAL WEATHER SERVICE IN THE SAN FRANCISCO BAY AREA HAS
EXTENDED THE
* FLASH FLOOD WARNING FOR...
MONTEREY COUNTY IN WESTERN CALIFORNIA...
THIS INCLUDES THE CITIES OF...TASSAJARA HOT SPRINGS...JAMESBURG...
BIG SUR VILLAGE...
* UNTIL 230 PM PST.
* AT 118 PM PST...NWS DOPPLER RADAR AND AUTOMATED RAIN GAGES
INDICATED THAT HOURLY RAINFALL RATES OF 1 INCHES OR MORE ARE
CONTINUING OVER THE HIGH TERRAIN OF MONTEREY COUNTY. STORM TOTALS OF
5 TO NEARLY 9 INCHES HAVE OCCURRED AND SPOTTERS INDICATE CONTINUED
FLASH FLOODING IN THE AREA. MORE RAINFALL IS EXPECTED THIS AFTERNOON.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO PICO BLANCO
CAMPGROUND AND ANDREW MOLERA STATE PARK
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.
IT IS IMPORTANT FOR CAMPERS AND HIKERS TO KNOW WHERE THEY ARE
RELATIVE TO CREEKS...STREAMS...OR RIVERS WHICH CAN BECOME DANGEROUS
IN HEAVY RAINS. BE PARTICULARLY AWARE IN HILLY TERRAIN WHERE MANY LOW
WATER CROSSINGS CAN QUICKLY BECOME KILLERS.
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 3601 12158 3614 12166 3620 12175 3623 12182
3632 12191 3634 12190 3636 12192 3648 12184
3629 12155 3603 12138 3602 12151 3601 12151
$$
BELL373
WGUS76 KMTR 302224
FFSMTR
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN FRANCISCO CA
224 PM PST FRI NOV 30 2012
CAC053-302232-
/O.EXP.KMTR.FF.W.0005.000000T0000Z-121130T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MONTEREY CA-
224 PM PST FRI NOV 30 2012
...THE FLASH FLOOD WARNING WILL EXPIRE AT 230 PM PST FOR MONTEREY
COUNTY...
DOPPLER RADAR INDICATES THAT RAINFALL HAS GREATLY DIMINISHED ACROSS
THE AREA. ADDITIONAL RISES IN CREEKS AND STREAMS ARE NO LONGER
EXPECTED TODAY. PEOPLE NEAR STREAMS ARE STILL URGED TO USE CAUTION
AS THEY MAY BE MUCH HIGHER THAN NORMAL FOR THIS AFTERNOON.
LAT...LON 3601 12158 3614 12166 3620 12175 3623 12182
3632 12191 3634 12190 3636 12192 3648 12184
3629 12155 3603 12138 3602 12151 3601 12151
$$
BELLThe office that day
Everything else NWS San Francisco Bay Area, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 30, 4:16 AM PST | Flash Flood Warning | MTR | Sonoma | 119 min |
| Nov 30, 5:38 AM PST | Areal Flood Advisory | MTR | Santa Cruz | 6 hr |
| Nov 30, 6:22 AM PST | Flash Flood Warning | MTR | Sonoma | 3 hr |
| Nov 30, 8:27 AM PST | Areal Flood Advisory | MTR | Alameda, Contra Costa, Marin, Monterey, San Benito, City and County of San Francisco and 3 more | 3 hr |
| Nov 30, 9:02 AM PST | Areal Flood Advisory | MTR | Marin, Napa, Sonoma | 118 min |
| Nov 30, 9:29 AM PST | Flash Flood Warning | MTR | Monterey | 61 min |
| Nov 30, 10:38 AM PST | Flash Flood Warning | MTR | Monterey | 82 min |
| Nov 30, 11:03 AM PST | River Flood Watch | MTR | Sonoma | 26 days |
| Nov 30, 11:25 AM PST | Areal Flood Advisory | MTR | Alameda, Contra Costa, Marin, Monterey, San Benito, City and County of San Francisco and 3 more | 3 hr |
| Nov 30, 2:56 PM PST | Small Craft Advisory | MTR | 47 hr |
Nearby
Flash Flood Warnings in California, 2012Every flash 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.