Alert archive / Arizona / Flash Flood Warnings in 2012
Flash Flood Warning 49, NWS Phoenix, AZ
NWS Phoenix, AZ issued this flash flood warning at Aug 21, 2012, 8:00 PM MST for Pinal County, Arizona. It was in force for 30 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
- Aug 21, 2012, 8:00 PM MST (03:00 UTC)
- Expired
- Aug 21, 2012, 8:30 PM MST
- In force
- 30 min
- Issued by
- NWS Phoenix, AZ
- Area
- Storm-based polygon
- Flood severity
- None
County Pinal County, AZ
The radar
The Phoenix radar (KIWA), 33 km from the middle of the area, began a volume at 03:01 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 |
|---|---|---|---|
| Aug 21, 8:15 PM MST | HEAVY RAIN 2.07 | 1 Wsw Coolidge, AZ |
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, 3.0 hours before the alert went out and 62 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
- 565 J/kg
- Mixed-layer CIN
- -80 J/kg
- Mixed-layer LCL
- 2143 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 8 m²/s²
- 0-3 km storm-relative helicity
- 30 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
670
WGUS55 KPSR 220300
FFWPSR
AZC021-220330-
/O.NEW.KPSR.FF.W.0049.120822T0300Z-120822T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PHOENIX AZ
800 PM MST TUE AUG 21 2012
THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A
* FLASH FLOOD WARNING FOR...
CENTRAL PINAL COUNTY IN SOUTH CENTRAL ARIZONA...
THIS INCLUDES THE AREA AROUND COOLIDGE...SAN TAN VALLEY...
AND FLORENCE.
* UNTIL 830 PM MST
* AT 752 PM MST...THUNDERSTORMS HAD WEAKENED IN THE AREA...HOWEVER
IN THE AFTERMATH OF EXTREMELY HEAVY RAIN...MANY WASHES...RURAL
FARM ROADS...AND OTHER LOW LYING AREAS ARE LIKELY STILL FLOODED.
WATER WILL TAKE SOME TIME TO RECEDE. MOTORISTS SHOULD USE EXTRA
CAUTION WHEN TRAVELING AT NIGHT.
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.
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF NORMALLY
DRY WASHES AND CREEKS...ROADS...AND LOW LYING SPOTS. UNBRIDGED
CROSSINGS WILL BE ESPECIALLY DANGEROUS.
&&
LAT...LON 3313 11171 3322 11145 3300 11132 3293 11139
3289 11145 3289 11148
$$
HVThe office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 21, 5:10 PM MST | Special Weather Statement | PSR | La Paz | 80 min |
| Aug 21, 5:29 PM MST | Special Weather Statement | PSR | Pinal | 46 min |
| Aug 21, 5:37 PM MST | Flash Flood Warning | PSR | La Paz | 83 min |
| Aug 21, 5:55 PM MST | Severe Thunderstorm Warning | PSR | La Paz | 65 min |
| Aug 21, 5:59 PM MST | Special Weather Statement | PSR | Maricopa | 76 min |
| Aug 21, 6:00 PM MST | Severe Thunderstorm Warning | PSR | La Paz | 39 min |
| Aug 21, 6:09 PM MST | Special Weather Statement | PSR | Pinal | 51 min |
| Aug 21, 6:12 PM MST | Flash Flood Warning | PSR | La Paz | 71 min |
| Aug 21, 6:51 PM MST | Flash Flood Warning | PSR | La Paz | 75 min |
| Aug 21, 6:56 PM MST | Areal Flood Advisory | PSR | Gila, Maricopa, Pinal | 3 hr |
| Aug 21, 6:57 PM MST | Severe Thunderstorm Warning | PSR | Pinal | 33 min |
| Aug 21, 7:03 PM MST | Blowing Dust Advisory | PSR | 57 min | |
| Aug 21, 7:05 PM MST | Flash Flood Warning | PSR | Pinal | 55 min |
| Aug 21, 7:09 PM MST | Special Weather Statement | PSR | La Paz | 66 min |
| Aug 21, 7:30 PM MST | Severe Thunderstorm Warning | PSR | Pinal | 30 min |
| Aug 21, 7:37 PM MST | Special Weather Statement | PSR | Maricopa | 53 min |
| Aug 21, 7:49 PM MST | Areal Flood Advisory | PSR | La Paz | 90 min |
| Aug 21, 8:16 PM MST | Areal Flood Advisory | PSR | Maricopa | 119 min |
| Aug 21, 8:28 PM MST | Flash Flood Warning | PSR | Maricopa | 2 hr |
| Aug 21, 9:02 PM MST | Areal Flood Advisory | PSR | Maricopa | 118 min |
| Aug 21, 9:32 PM MST | Areal Flood Advisory | PSR | Maricopa, Pinal | 118 min |
| Aug 21, 9:53 PM MST | Special Weather Statement | PSR | 37 min | |
| Aug 21, 10:07 PM MST | Special Weather Statement | PSR | Yuma | 38 min |
| Aug 21, 10:24 PM MST | Blowing Dust Advisory | PSR | 3 hr | |
| Aug 21, 10:40 PM MST | Areal Flood Advisory | PSR | La Paz | 81 min |
| Aug 21, 10:54 PM MST | Special Weather Statement | PSR | 66 min | |
| Aug 21, 11:15 PM MST | Special Weather Statement | PSR | La Paz | 75 min |
| Aug 22, 1:34 PM MST | Flash Flood Watch | PSR | 15 hr | |
| Aug 22, 1:44 PM MST | Flash Flood Warning | PSR | Maricopa, Pinal | 3 hr |
| Aug 22, 2:32 PM MST | Areal Flood Advisory | PSR | Maricopa | 118 min |
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.