Alert archive / Arizona / Flash Flood Warnings in 2012
Flash Flood Warning 34, NWS Phoenix, AZ
NWS Phoenix, AZ issued this flash flood warning at Aug 16, 2012, 11:41 PM MST for Maricopa County, Arizona. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 16, 2012, 11:41 PM MST (06:41 UTC)
- Expired
- Aug 17, 2012, 2:45 AM MST
- In force
- 3 hr
- Issued by
- NWS Phoenix, AZ
- Area
- Storm-based polygon
- Flood severity
- None
County Maricopa County, AZ
The nearest sounding before it
Phoenix, AZ (KPSR), launched 00:00Z, 6.7 hours before the alert went out and 59 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
- 934 J/kg
- Mixed-layer CIN
- -65 J/kg
- Mixed-layer LCL
- 1678 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 8 m²/s²
- 0-3 km storm-relative helicity
- 55 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
114 WGUS55 KPSR 170641 FFWPSR AZC013-170945- /O.NEW.KPSR.FF.W.0034.120817T0641Z-120817T0945Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE PHOENIX AZ 1141 PM MST THU AUG 16 2012 THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A * FLASH FLOOD WARNING FOR... EXTREME EAST CENTRAL MARICOPA COUNTY IN SOUTH CENTRAL ARIZONA... THIS INCLUDES THE AREA OF SUGARLOAF MOUNTAIN...BALLANTINE TRAILHEAD...ROUND VALLEY... * UNTIL 245 AM MST * AT 1138 PM MST...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO DETECT HEAVY RAIN OVER THE SUNFLOWER BURN AREA. THE RAIN WILL PRODUCE HIGH WATER IN CREEKS AND WASHES ACCOMPANIED BY MUD...ROCKS AND DEBRIS. * FLASH FLOODING OF SYCAMORE CREEK IS OCCURING AND WILL AFFECT LOCATIONS DOWNSTREAM OF SUNFLOWER. LOCATIONS INCLUDE BOULDER CREEK...ROUND VALLEY...THE DOS S RANCH...AND THE MESQUITE WASH NEAR SUGARLOAF MOUNTAIN RECREATION AREA. THE FLOW COULD POSSIBLY REACH THE VERDE RIVER AT THE FORT MCDOWELL INDIAN COMMUNITY. PRECAUTIONARY/PREPAREDNESS ACTIONS... IF YOU ARE NEAR THE BANKS OF SYCAMORE CREEK OR OTHER NEARBY DRAINAGE AREAS MOVE IMMEDIATELY TO HIGHER GROUND. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE WATER COVERS THE ROAD. TURN AROUND DONT DROWN. TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY YOUR REPORT. && LAT...LON 3386 11150 3385 11144 3368 11151 3369 11156 $$ MEYERS
1 follow-up statement
384 WGUS75 KPSR 170852 FFSPSR FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE PHOENIX AZ 152 AM MST FRI AUG 17 2012 AZC013-170945- /O.CON.KPSR.FF.W.0034.000000T0000Z-120817T0945Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MARICOPA AZ- 152 AM MST FRI AUG 17 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 245 AM MST FOR EXTREME EAST CENTRAL MARICOPA COUNTY... AT 150 AM MST...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED RAPID DEBRIS FLOW ALONG SYCAMORE CREEK ALONG HIGHWAY 87 AT ROUND VALLEY. SYCAMORE CREEK HAS LEFT ITS BANKS AND IS NEARLY 40 YARDS WIDE IN SOME LOCATIONS. TONTO NATIONAL FOREST HAS CLOSED FOREST ROADS 403 AND 414 NEAR SYCAMORE CREEK. LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ROUND VALLEY PRECAUTIONARY/PREPAREDNESS ACTIONS... IF YOU ARE NEAR THE BANKS OF SYCAMORE CREEK OR OTHER NEARBY DRAINAGE AREAS MOVE IMMEDIATELY TO HIGHER GROUND. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE WATER COVERS THE ROAD. TURN AROUND DONT DROWN. TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY YOUR REPORT. && LAT...LON 3386 11150 3385 11144 3368 11151 3369 11156 $$ LEINS
The office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 16, 6:16 PM MST | Special Weather Statement | PSR | 44 min | |
| Aug 16, 6:43 PM MST | Areal Flood Advisory | PSR | La Paz, Yuma | 106 min |
| Aug 16, 6:50 PM MST | Severe Thunderstorm Warning | PSR | La Paz, Maricopa | 40 min |
| Aug 16, 7:08 PM MST | Flash Flood Warning | PSR | La Paz, Maricopa | 2 hr |
| Aug 16, 8:25 PM MST | Areal Flood Advisory | PSR | La Paz, Maricopa | 110 min |
| Aug 16, 9:02 PM MST | Areal Flood Advisory | PSR | Maricopa | 118 min |
| Aug 16, 11:10 PM MST | Flash Flood Warning | PSR | Maricopa | 2 hr |
| Aug 16, 11:29 PM MST | Areal Flood Advisory | PSR | La Paz | 2 hr |
| Aug 17, 12:54 AM MST | Areal Flood Advisory | PSR | La Paz, Yuma | 111 min |
| Aug 17, 1:14 AM MST | Areal Flood Advisory | PSR | Maricopa | 2 hr |
| Aug 17, 2:43 AM MST | Areal Flood Warning | PSR | Maricopa | 4 hr |
| Aug 17, 6:26 AM MST | Areal Flood Advisory | PSR | Maricopa | 3 hr |
| Aug 17, 11:16 AM MST | Areal Flood Advisory | PSR | Maricopa | 119 min |
| Aug 17, 11:42 AM MST | Flash Flood Warning | PSR | Maricopa | 2 hr |
| Aug 17, 11:59 AM MST | Blowing Dust Advisory | PSR | 2 hr | |
| Aug 17, 12:25 PM MST | Flash Flood Warning | PSR | Maricopa, Pinal | 2 hr |
| Aug 17, 2:45 PM MST | Blowing Dust Advisory | PSR | 91 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.