Alert archive / California / Flash Flood Warnings in 2012
Flash Flood Warning 28, NWS Phoenix, AZ
NWS Phoenix, AZ issued this flash flood warning at Jul 31, 2012, 10:16 AM PDT for Imperial County, Riverside County, San Bernardino County, California; La Paz County, Arizona. It was in force for 3 hr. 5 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
- Jul 31, 2012, 10:16 AM PDT (17:16 UTC)
- Expired
- Jul 31, 2012, 1:15 PM PDT
- In force
- 3 hr
- Issued by
- NWS Phoenix, AZ
- Area
- Storm-based polygon
- Flood severity
- None
Counties La Paz County, AZ, Imperial County, CA, Riverside County, CA, San Bernardino County, CA
The radar
The Yuma radar (KYUX), 152 km from the middle of the area, began a volume at 17:20 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 |
|---|---|---|---|
| Jul 31, 10:27 AM PDT | FLASH FLOOD | 2 N Desert Center, CA | KAISER ROAD UNDERWATER. WATER IS THREATENING INTERSTATE 10 IN THE AREA. SPOTTER ID RIE009. |
| Jul 31, 11:15 AM PDT | FLASH FLOOD | 2 Wsw Ehrenberg, AZ | PARKER SO REPORTS FLOODED HIGHWAY IN EHRENBERG |
| Jul 31, 12:30 PM PDT | FLASH FLOOD | 13 Ne Desert Center, CA | REPORTED BY CAL TRANS. HIGHWAY 177 CLOSED DUE TO FLOODING. |
| Jul 31, 12:30 PM PDT | FLASH FLOOD | 8 E Mecca, CA | BOX CANYON FLOODED. ROAD CLOSED. PER CAL TRANS. |
| Jul 31, 12:40 PM PDT | FLASH FLOOD | 21 Ne Eagle Mtn, CA | ROAD FLOODED FROM 29 PALMS TO US95. CLOSED ENTIRE LENGTH. PER CALTRANS |
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, 5.3 hours before the alert went out and 207 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
- 1285 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- -27 m²/s²
- 0-3 km storm-relative helicity
- 72 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
241
WGUS55 KPSR 311716
FFWPSR
AZC012-CAC025-065-071-312015-
/O.NEW.KPSR.FF.W.0028.120731T1716Z-120731T2015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PHOENIX AZ
1016 AM PDT TUE JUL 31 2012
THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A
* FLASH FLOOD WARNING FOR...
NORTH CENTRAL IMPERIAL COUNTY IN SOUTHEAST CALIFORNIA...
EASTERN RIVERSIDE COUNTY IN SOUTHERN CALIFORNIA...
THIS INCLUDES DESERT CENTER...CHIRIACO SUMMIT...
SOUTH CENTRAL SAN BERNARDINO COUNTY IN SOUTHERN CALIFORNIA...
WEST CENTRAL LA PAZ COUNTY IN WEST CENTRAL ARIZONA...
* UNTIL 115 PM PDT/115 PM MST/
* AT 1010 AM PDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED
VERY HEAVY RAIN THAT WILL CAUSE FLASH FLOODING.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
MIDLAND...EAGLE MTN...CHIRIACO SUMMIT...DESERT CENTER...COTTONWOOD
VISITOR CENTER...JOSHUA TREE NATIONAL PARK...STATE ROUTE 177...STATE
ROUTE 111...BOX CANYON ROAD
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.
&&
LAT...LON 3408 11454 3389 11447 3344 11455 3335 11562
3350 11596 3373 11595 3374 11597 3403 11598
$$
DEWEY3 follow-up statements
692
WGUS75 KPSR 311735
FFSPSR
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PHOENIX AZ
1035 AM MST TUE JUL 31 2012
AZC012-311745-
/O.CAN.KPSR.FF.W.0028.000000T0000Z-120731T2015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LA PAZ AZ-
1035 AM MST TUE JUL 31 2012
...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR WEST CENTRAL LA PAZ
COUNTY...
LAT...LON 3408 11454 3388 11455 3344 11465 3335 11562
3350 11596 3373 11595 3374 11597 3403 11598
$$
CAC025-065-071-312015-
/O.CON.KPSR.FF.W.0028.000000T0000Z-120731T2015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
RIVERSIDE CA-IMPERIAL CA-SAN BERNARDINO CA-
1035 AM PDT TUE JUL 31 2012
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 115 PM PDT FOR SOUTH
CENTRAL SAN BERNARDINO...NORTH CENTRAL IMPERIAL AND EASTERN RIVERSIDE
COUNTIES...
AT 1029 AM PDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
THUNDERSTORM PRODUCING VERY HEAVY RAIN THAT WILL CAUSE FLASH
FLOODING.
LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO MIDLAND...
EAGLE MTN AND COTTONWOOD VISITOR CENTER
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.
&&
LAT...LON 3408 11454 3388 11455 3344 11465 3335 11562
3350 11596 3373 11595 3374 11597 3403 11598
$$
DEWEY269
WGUS75 KPSR 311820
FFSPSR
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PHOENIX AZ
1120 AM PDT TUE JUL 31 2012
CAC025-065-071-312015-
/O.CON.KPSR.FF.W.0028.000000T0000Z-120731T2015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
RIVERSIDE CA-IMPERIAL CA-SAN BERNARDINO CA-
1120 AM PDT TUE JUL 31 2012
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 115 PM PDT FOR SOUTH
CENTRAL SAN BERNARDINO...NORTH CENTRAL IMPERIAL AND EASTERN RIVERSIDE
COUNTIES...
AT 1116 AM PDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED
TO MONITOR THUNDERSTORMS PRODUCING VERY HEAVY RAIN THAT WILL CAUSE
FLASH FLOODING. TRAINED SPOTTERS REPORTED WATER ON ROADWAYS AND
STREET FLOODING.
LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
MIDLAND...EAGLE MTN...COTTONWOOD VISITOR CENTER...STATE ROUTE
177...STATE ROUTE 111...BOX CANYON ROAD...AND INTERSTATE 10...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A FLASH FLOOD WARNING MEANS THAT PEOPLE ALONG THE BANKS OF WASHES AND
CREEKS SHOULD MOVE TO HIGHER GROUND IMMEDIATELY. NORMALLY DRY WASHES
AND STREAMS WILL SUDDENLY HAVE RUNNING WATER AND MAKE UNBRIDGED
CROSSINGS IMPASSABLE. STREETS...UNDERPASSES...AND LOW SPOTS WILL
BECOME INUNDATED MAKING DRIVING HAZARDOUS IN THE WARNED AREA.
&&
LAT...LON 3408 11454 3388 11455 3360 11491 3335 11562
3350 11596 3373 11595 3374 11597 3403 11598
$$
DEWEY976
WGUS75 KPSR 312015
FFSPSR
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PHOENIX AZ
115 PM PDT TUE JUL 31 2012
CAC025-065-071-312024-
/O.EXP.KPSR.FF.W.0028.000000T0000Z-120731T2015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
RIVERSIDE CA-IMPERIAL CA-SAN BERNARDINO CA-
115 PM PDT TUE JUL 31 2012
...THE FLASH FLOOD WARNING WILL EXPIRE AT 115 PM PDT FOR SOUTH
CENTRAL SAN BERNARDINO...NORTH CENTRAL IMPERIAL AND EASTERN RIVERSIDE
COUNTIES...
HEAVY RAINFALL HAS DECREASED GRADUALLY...HOWEVER THE THREAT FOR
RUNNING WASHES CONTINUES FOR SEVERAL HOURS.
LAT...LON 3408 11454 3388 11455 3360 11491 3335 11562
3350 11596 3373 11595 3374 11597 3403 11598
$$
DEWEYThe office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 30, 6:15 PM PDT | Areal Flood Advisory | PSR | Imperial | 2 hr |
| Jul 30, 7:31 PM PDT | Areal Flood Warning | PSR | Imperial | 15 hr |
| Jul 31, 3:42 AM PDT | Flash Flood Watch | PSR | 15 hr | |
| Jul 31, 4:49 AM PDT | Areal Flood Advisory | PSR | Imperial | 116 min |
| Jul 31, 4:58 AM PDT | Flash Flood Warning | PSR | Imperial | 3 hr |
| Jul 31, 9:02 AM PDT | Areal Flood Advisory | PSR | Riverside, San Bernardino | 3 hr |
| Jul 31, 12:12 PM PDT | Severe Thunderstorm Warning | PSR | Riverside, San Bernardino | 49 min |
| Jul 31, 1:28 PM PDT | Areal Flood Advisory | PSR | Imperial, Riverside | 3 hr |
| Jul 31, 1:31 PM PDT | Flash Flood Warning | PSR | San Bernardino | 119 min |
| Jul 31, 3:40 PM PDT | Areal Flood Advisory | PSR | Riverside, San Bernardino | 2 hr |
| Jul 30, 5:12 PM PDT | Areal Flood Advisory | PSR | La Paz | 2 hr |
| Jul 30, 11:26 PM PDT | Special Weather Statement | PSR | Gila | 79 min |
| Jul 31, 12:31 AM PDT | Special Weather Statement | PSR | Gila | 59 min |
| Jul 31, 1:15 AM PDT | Special Weather Statement | PSR | 45 min | |
| Jul 31, 10:47 AM PDT | Areal Flood Advisory | PSR | La Paz, Yuma | 52 min |
| Jul 31, 11:06 AM PDT | Special Weather Statement | PSR | La Paz | 39 min |
| Jul 31, 11:37 AM PDT | Flash Flood Warning | PSR | La Paz, Yuma | 113 min |
| Jul 31, 12:05 PM PDT | Special Weather Statement | PSR | La Paz | 40 min |
| Jul 31, 4:10 PM PDT | Blowing Dust Advisory | PSR | 19 min | |
| Jul 31, 4:29 PM PDT | Dust Storm Warning | PSR | 82 min | |
| Jul 31, 4:48 PM PDT | Severe Thunderstorm Warning | PSR | Maricopa | 27 min |
Nearby
Flash Flood Warnings in California, 2012Flash Flood Warnings in Arizona, 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.