Alert archive / California / Flash Flood Warnings in 2012

Flash Flood Warning 5, NWS Phoenix, AZ

July 13, 2012Imperial County, California

NWS Phoenix, AZ issued this flash flood warning at Jul 13, 2012, 2:30 PM PDT for Imperial County, California. It was in force for 2 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: Jul 13, 2012, 2:30 PM PDT (21:30 UTC)
Expired: Jul 13, 2012, 4:30 PM PDT
In force: 2 hr
Issued by: NWS Phoenix, AZ
Area: Storm-based polygon
Flood severity: None

County Imperial County, CA

What was reported inside it

Time	Report	Where	Remark
Jul 13, 4:27 PM PDT	FLASH FLOOD	11 Ssw Salton City, CA	CHP REPORTED CLOSURE OF CA SR 78 W OF JUNCTION WITH 86 DUE TO FLOODING. REPORTS OF SEVERAL VEHICLES IN WASHES AND ADDITIONAL ROADWAY FLOODING.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

San Diego, CA (KNKX), launched 12:00Z, 9.5 hours before the alert went out and 118 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1005 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: -3 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

018 
WGUS55 KPSR 132130
FFWPSR
CAC025-132330-
/O.NEW.KPSR.FF.W.0005.120713T2130Z-120713T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PHOENIX AZ
230 PM PDT FRI JUL 13 2012

THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHWESTERN IMPERIAL COUNTY IN SOUTHEAST CALIFORNIA...
  THIS INCLUDES SALTON CITY...

* UNTIL 430 PM PDT

* AT 228 PM PDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED
  THUNDERSTORMS WITH VERY HEAVY RAIN FROM SOUTH OF DESERT SHORES...
  TO NEAR SALTON CITY...TO EAST OF OCOTILLO WELLS. MOVEMENT WAS
  SLOWLY NORTH.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO DESERT
  SHORES. FLOODING WILL ALSO AFFECT SAN FELIPE CREEK...ARROYO SALADA
  WASH...PALM WASH...AND GRAVE WASH.

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.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS 
SAFELY. REMEMBER...TURN AROUND DONT DROWN.

&&

LAT...LON 3308 11610 3308 11609 3342 11608 3342 11586
      3314 11576 3293 11610

$$

WOODALL

1 follow-up statement

616 
WGUS75 KPSR 132154
FFSPSR

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PHOENIX AZ
254 PM PDT FRI JUL 13 2012

CAC025-132330-
/O.CON.KPSR.FF.W.0005.000000T0000Z-120713T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
IMPERIAL CA-
254 PM PDT FRI JUL 13 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 430 PM PDT FOR
NORTHWESTERN IMPERIAL COUNTY...

AT 250 PM PDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED 
THUNDERSTORMS WITH VERY HEAVY RAIN SOUTH OF SALTON CITY. OTHER 
THUNDERSTORMS AND RAIN SHOWERS EXTENDED FROM NEAR DESERT SHORES TO 
EAST OF OCOTILLO WELLS.

FLOODING WILL AFFECT SALTON CITY...HIGHWAYS 78 AND 86...SAN FELIPE 
CREEK...ARROYO SALADA WASH...PALM WASH...AND GRAVE WASH.

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.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS 
SAFELY. REMEMBER...TURN AROUND DONT DROWN.
&&

LAT...LON 3308 11610 3308 11609 3342 11608 3342 11586
      3314 11576 3293 11610

$$

WOODALL

The office that day

Everything else NWS Phoenix, AZ issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 13, 1:18 PM PDT	Flash Flood Watch	PSR		11 hr
Jul 13, 1:32 PM PDT	Areal Flood Advisory	PSR	Riverside, San Bernardino	118 min
Jul 13, 2:01 PM PDT	Areal Flood Advisory	PSR	Imperial	119 min
Jul 13, 2:51 PM PDT	Areal Flood Advisory	PSR	Riverside	114 min
Jul 13, 3:09 PM PDT	Severe Thunderstorm Warning	PSR	Imperial	66 min
Jul 13, 3:21 PM PDT	Flash Flood Warning	PSR	Imperial	114 min
Jul 13, 3:53 PM PDT	Special Weather Statement	PSR	Imperial	37 min
Jul 13, 4:09 PM PDT	Severe Thunderstorm Warning	PSR	Imperial	51 min
Jul 13, 4:27 PM PDT	Flash Flood Warning	PSR	Imperial	2 hr

Nearby

Flash Flood Warnings in California, 2012 Every 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.