Alert archive / California / Flash Flood Warnings in 2012
Flash Flood Warning 65, NWS Phoenix, AZ
NWS Phoenix, AZ issued this flash flood warning at Sep 4, 2012, 4:09 PM PDT for Imperial County, California. It was in force for 92 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Sep 4, 2012, 4:09 PM PDT (23:09 UTC)
- Expired
- Sep 4, 2012, 5:41 PM PDT
- In force
- 92 min
- Issued by
- NWS Phoenix, AZ
- Area
- Storm-based polygon
- Flood severity
- None
County Imperial County, CA
The radar
The Yuma radar (KYUX), 69 km from the middle of the area, began a volume at 23:10 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
Yuma Intl Airpor, AZ (KYUM), launched 12:00Z, 11.2 hours before the alert went out and 59 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
- 907 J/kg
- Mixed-layer CIN
- -175 J/kg
- Mixed-layer LCL
- 1469 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- 2 m²/s²
- 0-3 km storm-relative helicity
- 12 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
849
WGUS55 KPSR 042309
FFWPSR
CAC025-050115-
/O.NEW.KPSR.FF.W.0065.120904T2309Z-120905T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PHOENIX AZ
409 PM PDT TUE SEP 4 2012
THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A
* FLASH FLOOD WARNING FOR...
CENTRAL IMPERIAL COUNTY IN SOUTHEAST CALIFORNIA...
* UNTIL 615 PM PDT
* AT 405 PM PDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED
VERY HEAVY RAIN THAT WILL CAUSE FLASH FLOODING.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO GLAMIS
AND TRAVELERS ALONG STATE 78.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A FLASH FLOOD WARNING MEANS THAT PEOPLE ALONG THE BANKS OF WASHES AND
CREEKS SHOULD MOVE TO HIGHER GROUND IMMEDIATELY. NORMALLY DRY WASHES
AND STREAMS WILL SUDDENLY HAVE RUNNING WATER AND MAKE UNBRIDGED
CROSSINGS IMPASSABLE. STREETS...UNDERPASSES...AND LOW SPOTS WILL
BECOME INUNDATED MAKING DRIVING HAZARDOUS IN THE WARNED AREA.
MOST FLOOD DEATHS OCCUR IN MOTORIZED VEHICLES. WHEN ENCOUNTERING
FLOODED ROADS...MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.
&&
LAT...LON 3299 11525 3308 11502 3313 11493 3313 11485
3298 11486 3298 11493 3294 11525
$$
NOLTE2 follow-up statements
265
WGUS75 KPSR 042326
FFSPSR
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PHOENIX AZ
426 PM PDT TUE SEP 4 2012
CAC025-050115-
/O.CON.KPSR.FF.W.0065.000000T0000Z-120905T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
IMPERIAL CA-
426 PM PDT TUE SEP 4 2012
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 615 PM PDT FOR
CENTRAL IMPERIAL COUNTY...
AT 419 PM PDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
LARGE AREA OF THUNDERSTORM ACTIVITY PRODUCING VERY HEAVY RAIN
THAT WILL CAUSE FLASH FLOODING.
RADAR ESTIMATES THAT THREE QUARTERS TO OVER ONE INCH OF RAIN HAS
FALLEN IN THE LAST HALF HOUR RIGHT OVER THE STATE ROUTE 78
CORRIDOR.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A FLASH FLOOD WARNING MEANS THAT PEOPLE ALONG THE BANKS OF WASHES AND
CREEKS SHOULD MOVE TO HIGHER GROUND IMMEDIATELY. NORMALLY DRY WASHES
AND STREAMS WILL SUDDENLY HAVE RUNNING WATER AND MAKE UNBRIDGED
CROSSINGS IMPASSABLE. STREETS...UNDERPASSES...AND LOW SPOTS WILL
BECOME INUNDATED MAKING DRIVING HAZARDOUS IN THE WARNED AREA.
MOST FLOOD DEATHS OCCUR IN MOTORIZED VEHICLES. WHEN ENCOUNTERING
FLOODED ROADS...MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.
&&
LAT...LON 3299 11525 3308 11502 3313 11493 3313 11485
3298 11486 3298 11493 3294 11525
$$
NOLTE666
WGUS75 KPSR 050041
FFSPSR
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PHOENIX AZ
541 PM PDT TUE SEP 4 2012
CAC025-050050-
/O.CAN.KPSR.FF.W.0065.000000T0000Z-120905T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
IMPERIAL CA-
541 PM PDT TUE SEP 4 2012
...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR CENTRAL IMPERIAL
COUNTY...
STORMS PRODUCING HEAVY RAINFALL HAVE ENDED ALONG THE STATE ROUTE 78
CORRIDOR IN EAST CENTRAL IMPERIAL COUNTY. IMPACTS ARE EXPECTED TO
LINGER AS RUNOFF CONTINUES TO MOVE THROUGH THE AREA FROM EARLIER
STORMS. NORMALLY DRY WASHES MAY BE RUNNING AND EXPECT PONDING OF
WATER ON ROAD SURFACES...PARTICULARLY LOW LYING PORTIONS.
LAT...LON 3299 11525 3308 11502 3313 11493 3313 11485
3298 11486 3298 11493 3294 11525
$$
NOLTEThe office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 3, 6:41 PM PDT | Areal Flood Advisory | PSR | Riverside | 3 hr |
| Sep 4, 1:45 PM PDT | Special Weather Statement | PSR | Riverside | 45 min |
| Sep 4, 1:55 PM PDT | Flash Flood Warning | PSR | Riverside, San Bernardino | 95 min |
| Sep 4, 2:42 PM PDT | Areal Flood Advisory | PSR | Riverside | 94 min |
| Sep 4, 2:54 PM PDT | Special Weather Statement | PSR | Riverside | 66 min |
| Sep 4, 3:18 PM PDT | Areal Flood Advisory | PSR | Riverside, San Bernardino | 80 min |
| Sep 4, 3:33 PM PDT | Special Weather Statement | PSR | Imperial | 57 min |
| Sep 4, 3:56 PM PDT | Blowing Dust Advisory | PSR | 2 hr | |
| Sep 4, 3:57 PM PDT | Special Weather Statement | PSR | Riverside | 78 min |
| Sep 4, 4:57 PM PDT | Special Weather Statement | PSR | Riverside | 48 min |
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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.