Alert archive / Arizona / Flash Flood Warnings in 2012
Flash Flood Warning 40, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this flash flood warning at Sep 4, 2012, 1:30 PM MST for Yavapai County, Arizona. It was in force for 2 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
- Sep 4, 2012, 1:30 PM MST (20:30 UTC)
- Expired
- Sep 4, 2012, 3:30 PM MST
- In force
- 2 hr
- Issued by
- NWS Flagstaff, AZ
- Area
- Storm-based polygon
- Flood severity
- None
County Yavapai County, AZ
The radar
The Flagstaff radar (KFSX), 108 km from the middle of the area, began a volume at 20:31 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
Phoenix, AZ (KPSR), launched 12:00Z, 8.5 hours before the alert went out and 95 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
- 463 J/kg
- Mixed-layer CIN
- -224 J/kg
- Mixed-layer LCL
- 1399 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- 36 m²/s²
- 0-3 km storm-relative helicity
- 44 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
718 WGUS55 KFGZ 042030 FFWFGZ AZC025-042230- /O.NEW.KFGZ.FF.W.0040.120904T2030Z-120904T2230Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE FLAGSTAFF AZ 130 PM MST TUE SEP 4 2012 THE NATIONAL WEATHER SERVICE IN FLAGSTAFF HAS ISSUED A * FLASH FLOOD WARNING FOR... SOUTH CENTRAL YAVAPAI COUNTY IN WEST CENTRAL ARIZONA... * UNTIL 330 PM MST * AT 122 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT HEAVY RAIN HAS SHIFTED JUST SOUTH OF THE GLADIATOR BURN AREA NEAR CROWN KING. HOWEVER...AUTOMATED RAIN GAGES INDICATED RAINFALL AMOUNTS AROUND 2 INCHES OVER THE SOUTHERN END OF THE GLADIATOR BURN AREA WHICH WILL LIKELY CONTINUE TO CAUSE FLASH FLOODING. PRECAUTIONARY/PREPAREDNESS ACTIONS... THE HEAVY RAIN WILL LIKELY TRIGGER LIFE-THREATENING FLASH FLOODS...AS WELL AS MUDSLIDES...ROCKSLIDES...AND DEBRIS FLOWS WITHIN AND DOWNSTREAM OF THE GLADIATOR FIRE BURN AREA. ROADWAYS IN THE AREA WILL LIKELY BE INUNDATED AND WASHED OUT. STREAMS IN THE AREA WILL FLOW FAR ABOVE TYPICAL LEVELS AND WILL CARRY HEAVY AMOUNTS OF SEDIMENT. AREAS IMPACTED BY THIS WARNING INCLUDE THE GLADIATOR FIRE BURN AREA...THE COMMUNITY OF CROWN KING...CROWN KING ROAD...SENATOR HIGHWAY...AND POTENTIALLY SECTIONS OF WAGONER ROAD. MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN. && LAT...LON 3430 11240 3425 11215 3415 11217 3420 11241 $$ JJ
1 follow-up statement
870 WGUS75 KFGZ 042228 FFSFGZ FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE FLAGSTAFF AZ 328 PM MST TUE SEP 4 2012 AZC025-042237- /O.EXP.KFGZ.FF.W.0040.000000T0000Z-120904T2230Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ YAVAPAI AZ- 328 PM MST TUE SEP 4 2012 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 330 PM MST FOR SOUTH CENTRAL YAVAPAI COUNTY... HEAVY RAIN HAS ENDED OVER THE GLADIATOR BURN AREA NEAR CROWN KING AND FLOODING CONDITIONS WILL CONTINUE TO IMPROVE. MINOR FLOODING AND ROAD WASHOUTS WERE REPORTED IN THE AREA EARLIER THIS AFTERNOON. LAT...LON 3430 11240 3425 11215 3415 11217 3420 11241 $$ JJ
The office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 4, 11:43 AM MST | Flash Flood Warning | FGZ | Yavapai | 107 min |
| Sep 4, 1:13 PM MST | Areal Flood Advisory | FGZ | Yavapai | 3 hr |
| Sep 4, 1:18 PM MST | Flash Flood Warning | FGZ | Gila | 117 min |
| Sep 4, 2:18 PM MST | Areal Flood Advisory | FGZ | Coconino, Yavapai | 117 min |
| Sep 4, 2:25 PM MST | Special Weather Statement | FGZ | 35 min | |
| Sep 4, 2:51 PM MST | Areal Flood Advisory | FGZ | Gila | 114 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.