Alert archive / Arizona / Flash Flood Warnings in 2012
Flash Flood Warning 31, NWS Phoenix, AZ
NWS Phoenix, AZ issued this flash flood warning at Jul 31, 2012, 6:21 PM MST for Maricopa County, Arizona. It was in force for 114 min. 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 31, 2012, 6:21 PM MST (01:21 UTC)
- Expired
- Jul 31, 2012, 8:15 PM MST
- In force
- 114 min
- Issued by
- NWS Phoenix, AZ
- Area
- Storm-based polygon
- Flood severity
- None
County Maricopa County, AZ
The radar
The Phoenix radar (KIWA), 79 km from the middle of the area, began a volume at 01:24 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, 6:30 PM MST | FLASH FLOOD | 1 Ne Anthem, AZ | ANTHEM RECREATION PARK FLOODED. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Phoenix, AZ (KPSR), launched 00:00Z, 1.4 hours before the alert went out and 52 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
- 744 J/kg
- Mixed-layer CIN
- -53 J/kg
- Mixed-layer LCL
- 1738 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 61 m²/s²
- 0-3 km storm-relative helicity
- 118 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
695 WGUS55 KPSR 010121 FFWPSR AZC013-010315- /O.NEW.KPSR.FF.W.0031.120801T0121Z-120801T0315Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE PHOENIX AZ 621 PM MST TUE JUL 31 2012 THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A * FLASH FLOOD WARNING FOR... NORTH CENTRAL MARICOPA COUNTY IN SOUTH CENTRAL ARIZONA... THIS INCLUDES NEW RIVER... * UNTIL 815 PM MST * AT 614 PM MST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED THUNDERSTORMS PRODUCING VERY HEAVY RAIN THAT WILL CAUSE FLASH FLOODING. TRAINED SPOTTERS IN ANTHEM REPORT ONE AND ONE HALF INCHES OF RAIN HAVE FALLEN IN THE LAST 45 MINUTES. CURB TO CURB STREET FLOODING HAS BEEN REPORT IN ANTHEM...AND RAIN CONTINUES TO FALL. RUNOFF WILL CONTINUE TO FLOW INTO DEADMAN WASH AND SKUNK CREEK...AND PONDING OF WATER WILL OCCUR ON LOCAL ROADWAYS IN THE AREA AND ON INTERSTATE 17. PRECAUTIONARY/PREPAREDNESS ACTIONS... MOST FLOOD DEATHS OCCUR IN MOTORIZED VEHICLES. WHEN ENCOUNTERING FLOODED ROADS...MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN. TO REPORT FLOODING...PLEASE RELAY YOUR REPORT TO LOCAL LAW ENFORCEMENT WHEN YOU CAN DO SO SAFELY. && LAT...LON 3393 11219 3392 11209 3379 11209 3379 11221 $$ MEYERS
1 follow-up statement
988 WGUS75 KPSR 010209 FFSPSR FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE PHOENIX AZ 709 PM MST TUE JUL 31 2012 AZC013-010315- /O.CON.KPSR.FF.W.0031.000000T0000Z-120801T0315Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MARICOPA AZ- 709 PM MST TUE JUL 31 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 815 PM MST FOR NORTH CENTRAL MARICOPA COUNTY INCLUDING THE COMMUNITY OF ANTHEM... AT 656 PM MST...TRAINED WEATHER SPOTTERS REPORTED A THUNDERSTORM PRODUCING VERY HEAVY RAIN THAT WILL CAUSE FLASH FLOODING. THE HEAVY RAIN AND FLASH FLOODING WERE PRIMARILY AFFECTING THE COMMUNITY OF ANTHEM. SEVERAL TRAINED SPOTTERS REPORTED FROM ONE TO TWO INCHES OF RAIN WITHIN ONE HOUR IN THE ANTHEM AREA...AND RADAR RAINFALL ESTIMATED BETWEEN TWO AND THREE INCHES OF RAIN IN THE WARNING AREA SINCE 6 PM. HEAVY RAIN MAY HAVE CAUSED A ROOF COLLAPSE AT THE ANTHEM SAFEWAY ACCORDING TO THE LOCAL FIRE DEPARTMENT. FLASH FLOODING WAS ALSO OCCURRING ALONG THE DEADMAN WASH FROM ANTHEM SOUTHWESTWARD ACROSS INTERSTATE 17 TO THE CAREFREE HIGHWAY. LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO NEW RIVER AND INTERSTATE 17. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WARNING MEANS THAT PEOPLE ALONG THE BANKS OF WASHES AND CREEKS SHOULD MOVE TO HIGHER GROUND IMMEDIATELY. NORMALLY DRY WASHES AND STREAMS WILL SUDDENLY HAVE RUNNING WATER AND MAKE UNBRIDGED CROSSINGS IMPASSABLE. STREETS...UNDERPASSES...AND LOW SPOTS WILL BECOME INUNDATED MAKING DRIVING HAZARDOUS IN THE WARNED AREA. MOST FLOOD DEATHS OCCUR IN MOTORIZED VEHICLES. WHEN ENCOUNTERING FLOODED ROADS...MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN. TO REPORT FLOODING...PLEASE RELAY YOUR REPORT TO LOCAL LAW ENFORCEMENT WHEN YOU CAN DO SO SAFELY. && LAT...LON 3393 11219 3392 11209 3379 11209 3379 11221 $$ CB
The office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 31, 5:02 PM MST | Special Weather Statement | PSR | 28 min | |
| Jul 31, 5:10 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 43 min |
| Jul 31, 5:40 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 65 min |
| Jul 31, 5:56 PM MST | Areal Flood Advisory | PSR | Maricopa | 109 min |
| Jul 31, 8:08 PM MST | Areal Flood Warning | PSR | Maricopa | 10 hr |
Nearby
Flash 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.