Alert archive / Arizona / Flash Flood Warnings in 2012
Flash Flood Warning 69, NWS Phoenix, AZ
NWS Phoenix, AZ issued this flash flood warning at Sep 6, 2012, 4:50 PM MST for Yuma County, Arizona. It was in force for 106 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Sep 6, 2012, 4:50 PM MST (23:50 UTC)
- Expired
- Sep 6, 2012, 6:36 PM MST
- In force
- 106 min
- Issued by
- NWS Phoenix, AZ
- Area
- Storm-based polygon
- Flood severity
- None
County Yuma County, AZ
The radar
The Yuma radar (KYUX), 108 km from the middle of the area, began a volume at 23:50 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.
The nearest sounding before it
Yuma Prvg Ground, AZ (K1Y7), launched 12:00Z, 11.8 hours before the alert went out and 85 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
- 1992 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- -19 m²/s²
- 0-3 km storm-relative helicity
- -9 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
074 WGUS55 KPSR 062350 FFWPSR AZC027-070245- /O.NEW.KPSR.FF.W.0069.120906T2350Z-120907T0245Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE PHOENIX AZ 450 PM MST THU SEP 6 2012 THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A * FLASH FLOOD WARNING FOR... EAST CENTRAL YUMA COUNTY IN SOUTHWEST ARIZONA... * UNTIL 745 PM MST * AT 434 PM MST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED THUNDERSTORMS WITH VERY HEAVY RAIN NEAR DATELAND. * THE STORMS HAVE PRODUCED UP TO TWO INCHES OF RAIN WITHIN THE LAST HOUR...WITH AN ADDITIONAL ONE HALF INCH POSSIBLE. RUNOFF FROM THIS HEAVY RAIN WILL AFFECT THE RURAL ROADWAYS IN THE AREA OF DATELAND AND ALONG PORTIONS OF INTERSTATE 8. PRECAUTIONARY/PREPAREDNESS ACTIONS... 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. TO REPORT FLOODING...PLEASE RELAY YOUR REPORT TO LOCAL LAW ENFORCEMENT WHEN YOU CAN DO SO SAFELY. && LAT...LON 3284 11366 3288 11349 3279 11343 3273 11361 $$ DEWEY/MEYERS
3 follow-up statements
199 WGUS75 KPSR 070015 FFSPSR FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE PHOENIX AZ 515 PM MST THU SEP 6 2012 AZC027-070245- /O.CON.KPSR.FF.W.0069.000000T0000Z-120907T0245Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ YUMA AZ- 515 PM MST THU SEP 6 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 745 PM MST FOR EAST CENTRAL YUMA COUNTY... AT 503 PM MST...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUE TO DETECT THUNDERSTORMS PRODUCING HEAVY RAINFALL OVER THE AREA NEAR DATELAND. RADAR PRECIPITATION ESTIMATES INDICATE AN ADDITIONAL ONE AND ONE HALF INCHES OF RAIN HAS FALLEN IN THE LAST 40 MINUTES. LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO DATELAND. RUNOFF FROM THIS HEAVY RAIN WILL ALSO AFFECT RURAL ROADWAYS IN THE AREA OF DATELAND AND ALONG PORTIONS OF INTERSTATE 8. PRECAUTIONARY/PREPAREDNESS ACTIONS... MOST FLOOD DEATHS OCCUR IN MOTORIZED VEHICLES. WHEN ENCOUNTERING FLOODED ROADS...MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN. EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF NORMALLY DRY WASHES AND CREEKS...ROADS...AND LOW LYING SPOTS. UNBRIDGED CROSSINGS WILL BE ESPECIALLY DANGEROUS. TO REPORT FLOODING...PLEASE RELAY YOUR REPORT TO LOCAL LAW ENFORCEMENT WHEN YOU CAN DO SO SAFELY. && LAT...LON 3284 11366 3288 11349 3279 11343 3273 11361 $$ DEWEY/MEYERS
731 WGUS75 KPSR 070059 FFSPSR FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE PHOENIX AZ 559 PM MST THU SEP 6 2012 AZC027-070245- /O.CON.KPSR.FF.W.0069.000000T0000Z-120907T0245Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ YUMA AZ- 559 PM MST THU SEP 6 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 745 PM MST FOR EAST CENTRAL YUMA COUNTY... AT 554 PM MST...THE SHOWER AND THUNDERSTORM ACTIVITY HAS DIMINISHED AND LIGHT TO MODERATE RAINFALL MAY PERSIST OVER THE AREA FOR THE NEXT HOUR OR SO. RUNOFF FROM THESE STORMS WILL CONTINUE TO MAKE ITS WAY INTO WASHES IN THE AREA OVER THE NEXT SEVERAL HOURS. LOCATIONS INCLUDE DATELAND...AND RURAL ROADWAYS IN THE AREA ADJOINING INTERSTATE 8. PRECAUTIONARY/PREPAREDNESS ACTIONS... MOST FLOOD DEATHS OCCUR IN MOTORIZED VEHICLES. WHEN ENCOUNTERING FLOODED ROADS...MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN. 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. TO REPORT FLOODING...PLEASE RELAY YOUR REPORT TO LOCAL LAW ENFORCEMENT WHEN YOU CAN DO SO SAFELY. && LAT...LON 3284 11366 3288 11349 3279 11343 3273 11361 $$ DEWEY
021 WGUS75 KPSR 070136 FFSPSR FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE PHOENIX AZ 636 PM MST THU SEP 6 2012 AZC027-070146- /O.CAN.KPSR.FF.W.0069.000000T0000Z-120907T0245Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ YUMA AZ- 636 PM MST THU SEP 6 2012 ...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR EAST CENTRAL YUMA COUNTY... THE SHOWER AND THUNDERSTORM ACTIVITY HAS DIMINISHED AND LIGHT TO MODERATE RAINFALL MAY PERSIST OVER THE AREA FOR THE NEXT COUPLE HOURS. RUNOFF FROM THESE STORMS WILL CONTINUE TO MAKE ITS WAY INTO WASHES IN THE AREA. LOCATIONS THAT MAY EXPERIENCE ELEVATED FLOW INCLUDE BUT ARE NOT LIMITED TO...DATELAND...MOHAWK...SAN CRISTOBAL WASH...AND OTHER UNNAMED WASHES IN THE AREA ADJOINING INTERSTATE 8. LAT...LON 3284 11366 3288 11349 3279 11343 3273 11361 $$ DEWEY
The office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 5, 5:32 PM MST | Special Weather Statement | PSR | 43 min | |
| Sep 5, 5:38 PM MST | Areal Flood Advisory | PSR | La Paz | 112 min |
| Sep 5, 7:35 PM MST | Areal Flood Advisory | PSR | La Paz | 115 min |
| Sep 6, 1:35 PM MST | Flash Flood Watch | PSR | 12 hr | |
| Sep 6, 3:03 PM MST | Areal Flood Advisory | PSR | Maricopa, Yuma | 3 hr |
| Sep 6, 4:01 PM MST | Areal Flood Advisory | PSR | Maricopa, Pinal | 3 hr |
| Sep 6, 4:16 PM MST | Dust Storm Warning | PSR | 3 hr | |
| Sep 6, 4:19 PM MST | Severe Thunderstorm Warning | PSR | Pinal | 41 min |
| Sep 6, 4:41 PM MST | Blowing Dust Advisory | PSR | 11 min | |
| Sep 6, 4:46 PM MST | Areal Flood Advisory | PSR | Pinal | 119 min |
| Sep 6, 4:57 PM MST | Severe Thunderstorm Warning | PSR | Maricopa, Yuma | 49 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.