Alert archive / Arizona / Flash Flood Warnings in 2012
Flash Flood Warning 43, NWS Phoenix, AZ
NWS Phoenix, AZ issued this flash flood warning at Aug 20, 2012, 6:01 PM MST for La Paz County, Arizona. It was in force for 89 min. 2 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
- Aug 20, 2012, 6:01 PM MST (01:01 UTC)
- Expired
- Aug 20, 2012, 7:30 PM MST
- In force
- 89 min
- Issued by
- NWS Phoenix, AZ
- Area
- Storm-based polygon
- Flood severity
- None
County La Paz County, AZ
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 20, 6:30 PM MST | FLASH FLOOD | 2 Ene Quartzsite, AZ | REPORTS OF MULTIPLE ROAD CLOSURES AND RESTRICTIONS ACROSS THE COMMUNITY OF QUARTZSITE DUE TO HEAVY RAIN GENERATING HIGH WATER AND FLASH FLOODING. STREETS IMPACTED INCLUDE RIGGLES AVE. QUAIL TRAIL ST. AND PLYMOUTH. |
| Aug 20, 6:30 PM MST | FLASH FLOOD | 5 N Quartzsite, AZ | TYSON WASH APPROX 5 MILES NORTH OF QUARTZSITE WAS RUNNING AND COVERING STATE ROUTE 95. QUARTZSITE PD REPORTED AZ DPS AND ADOT RESPONDING AND HAD RESTRICTIONS-CLOSURES ALONG THE HIGHWAY. ESTIMATED TIME OF INITIAL FLOODING IMPACT AFTER 630PM LOCAL. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Yuma Intl Airpor, AZ (KYUM), launched 00:00Z, 1.0 hours before the alert went out and 125 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
- 1614 J/kg
- Mixed-layer CIN
- -66 J/kg
- Mixed-layer LCL
- 2403 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- -27 m²/s²
- 0-3 km storm-relative helicity
- -2 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
167 WGUS55 KPSR 210101 FFWPSR AZC012-210230- /O.NEW.KPSR.FF.W.0043.120821T0101Z-120821T0230Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE PHOENIX AZ 601 PM MST MON AUG 20 2012 THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A * FLASH FLOOD WARNING FOR... CENTRAL LA PAZ COUNTY IN WEST CENTRAL ARIZONA... * UNTIL 730 PM MST * AT 553 PM MST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED STORMS CAPABLE OF PRODUCING VERY HEAVY RAINFALL THAT WILL CAUSE FLASH FLOODING. RADAR ESTIMATES THAT UP TO ONE INCH OF RAINFALL HAS FALLEN IN THE LAST 15 MINUTES. * LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO QUARTZSITE AND INTERSTATE 10 EAST OF QUARTZSITE. 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 3378 11402 3359 11398 3358 11424 3376 11426 $$ NOLTE
2 follow-up statements
789 WGUS75 KPSR 210129 FFSPSR FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE PHOENIX AZ 629 PM MST MON AUG 20 2012 AZC012-210230- /O.CON.KPSR.FF.W.0043.000000T0000Z-120821T0230Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ LA PAZ AZ- 629 PM MST MON AUG 20 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 730 PM MST FOR CENTRAL LA PAZ COUNTY... AT 621 PM MST...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO MONITOR AN AREA OF THUNDERSTORMS PRODUCING HEAVY RAINFALL AND POTENTIAL FOR FLASH FLOODING NEAR QUARTZSITE. IMPACTS RELATED TO FLASH FLOODING ARE ANTICIPATED ALONG PORTIONS OF INTERSTATE 10 EAST OF QUARTZSITE...THE COMMUNITY OF QUARTZSITE AND ALONG STATE ROUTE 95 NORTH OF QUARTZSITE. TRAVELERS AND RESIDENTS IN THIS AREA SHOULD BE PREPARED FOR PONDING OF WATER ON ROAD SURFACES AND AVOID CROSSING WATER COVERED ROADWAYS. PRECAUTIONARY/PREPAREDNESS ACTIONS... MOST FLOOD DEATHS OCCUR IN MOTORIZED VEHICLES. WHEN ENCOUNTERING FLOODED ROADS...MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN. TO REPORT FLOODING...PLEASE RELAY YOUR REPORT TO LOCAL LAW ENFORCEMENT WHEN YOU CAN DO SO SAFELY. && LAT...LON 3378 11402 3359 11398 3358 11424 3376 11426 $$ NOLTE
115 WGUS75 KPSR 210225 FFSPSR FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE PHOENIX AZ 725 PM MST MON AUG 20 2012 AZC012-210232- /O.EXP.KPSR.FF.W.0043.000000T0000Z-120821T0230Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ LA PAZ AZ- 725 PM MST MON AUG 20 2012 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 730 PM MST FOR CENTRAL LA PAZ COUNTY... STORM RESPONSIBLE FOR THE HEAVY RAINFALL HAVE SINCE DISSIPATED OVER THE WARNING AREA. LOCAL POLICE EARLIER REPORTED DEBRIS ACROSS AREA ROADWAYS AND TRAVEL IMPACTS ACROSS QUARTZSITE DUE TO THE RUNOFF FROM THE HEAVY RAINFALL. EVEN THOUGH THE RAINFALL HAS GENERALLY ENDED...IMPACTS FROM RUNOFF AND RUNNING OF NORMALLY DRY WASHES MAY CONTINUE OVER THE NEW FEW HOURS. REMEMBER...DO NOT CROSS WATER COVERED ROADWAYS AS YOU DO NOT KNOW WHAT IS UNDERNEATH THE WATER AND WHAT CONDITION THE ROAD MAY BE IN. TURN AROUND...DO NOT DROWN. LAT...LON 3378 11402 3359 11398 3358 11424 3376 11426 $$ NOLTE
The office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 20, 5:05 PM MST | Special Weather Statement | PSR | 55 min | |
| Aug 20, 5:43 PM MST | Special Weather Statement | PSR | La Paz | 47 min |
| Aug 20, 6:42 PM MST | Special Weather Statement | PSR | Maricopa | 33 min |
| Aug 20, 6:53 PM MST | Special Weather Statement | PSR | 37 min | |
| Aug 20, 6:57 PM MST | Areal Flood Advisory | PSR | Maricopa | 62 min |
| Aug 20, 7:01 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 59 min |
| Aug 20, 7:11 PM MST | Blowing Dust Advisory | PSR | 81 min | |
| Aug 20, 7:21 PM MST | Flash Flood Warning | PSR | Maricopa | 114 min |
| Aug 21, 2:17 PM MST | Special Weather Statement | PSR | Gila | 43 min |
| Aug 21, 3:51 PM MST | Special Weather Statement | PSR | La Paz | 39 min |
| Aug 21, 4:18 PM MST | Areal Flood Advisory | PSR | Gila | 117 min |
| Aug 21, 4:42 PM MST | Areal Flood Advisory | PSR | La Paz | 93 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.