Alert archive / Arizona / Flash Flood Warnings in 2012
Flash Flood Warning 73, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Jul 31, 2012, 1:55 PM MST for Mohave 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
- Jul 31, 2012, 1:55 PM MST (20:55 UTC)
- Expired
- Jul 31, 2012, 4:00 PM MST
- In force
- 2 hr
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
- Flood severity
- None
County Mohave County, AZ
The radar
The Las Vegas radar (KESX), 99 km from the middle of the area, began a volume at 20:55 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
Las Vegas, NV (KVEF), launched 12:00Z, 8.9 hours before the alert went out and 160 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
- 121 J/kg
- Mixed-layer CIN
- -75 J/kg
- Mixed-layer LCL
- 1334 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- -5 m²/s²
- 0-3 km storm-relative helicity
- -43 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
706 WGUS55 KVEF 312055 FFWVEF AZC015-312300- /O.NEW.KVEF.FF.W.0073.120731T2055Z-120731T2300Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 155 PM MST TUE JUL 31 2012 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A * FLASH FLOOD WARNING FOR... CENTRAL MOHAVE COUNTY IN NORTHWEST ARIZONA... * UNTIL 400 PM MST. * AT 143 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN FROM A THUNDERSTORM OVER CENTRAL MOHAVE COUNTY...OR 50 MILES NORTH OF KINGMAN OR 8 MILES SOUTHWEST OF THE GRAND CANYON SKYWALK. THE STORM PRODUCING VERY HEAVY RAIN WAS NEARLY STATIONARY. * LOCATIONS IMPACTED INCLUDE... MAINLY RURAL AREAS OF CENTRAL MOHAVE COUNTY. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON AREA ROADWAYS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. TO ESCAPE RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN! REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER HASHTAG... NWSVEGAS. && LAT...LON 3601 11394 3600 11374 3592 11370 3582 11388 $$ SC
2 follow-up statements
861 WGUS75 KVEF 312154 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 254 PM MST TUE JUL 31 2012 AZC015-312300- /O.CON.KVEF.FF.W.0073.000000T0000Z-120731T2300Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MOHAVE AZ- 254 PM MST TUE JUL 31 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 400 PM MST FOR CENTRAL MOHAVE COUNTY... AT 244 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE ORIGINAL THUNDERSTORM HAS MOVED TO THE NORTH OF THE AREA...HOWEVER ADDITIONAL THUNDERSTORMS ARE MOVING INTO THE WARNED AREA FROM THE SOUTH. RUNOFF FROM THE EARLIER THUNDERSTORM IS STILL LIKELY CAUSING FLOODING. LOCATIONS IMPACTED INCLUDE... RURAL AREAS OF MOHAVE COUNTY...JUST SOUTH OF THE GRAND CANYON SKYWALK. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON AREA ROADWAYS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. TO ESCAPE RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN! REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER HASHTAG... NWSVEGAS. && LAT...LON 3601 11394 3600 11374 3592 11370 3582 11388 $$ SC
862 WGUS75 KVEF 312259 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 359 PM MST TUE JUL 31 2012 AZC015-312306- /O.EXP.KVEF.FF.W.0073.000000T0000Z-120731T2300Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MOHAVE AZ- 359 PM MST TUE JUL 31 2012 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 400 PM MST FOR CENTRAL MOHAVE COUNTY... RUNOFF FROM EARLIER THUNDERSTORMS SHOULD HAVE DIMINISHED AND ANY FLASH FLOODING SHOULD HAVE ENDED. THE FLASH FLOOD WARNING WILL BE ALLOWED TO EXPIRE AT 400 PM MST. LAT...LON 3601 11394 3600 11374 3592 11370 3582 11388 $$ SC
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 31, 2:29 AM MST | Flash Flood Watch | VEF | Mohave | 19 hr |
| Jul 31, 12:14 PM MST | Areal Flood Advisory | VEF | Mohave | 83 min |
| Jul 31, 2:21 PM MST | Flash Flood Warning | VEF | Mohave | 114 min |
| Jul 31, 2:42 PM MST | Flash Flood Warning | VEF | Mohave | 3 hr |
| Jul 31, 2:48 PM MST | Flash Flood Warning | VEF | Mohave | 3 hr |
| Jul 31, 3:12 PM MST | Areal Flood Advisory | VEF | Mohave | 113 min |
| Jul 31, 3:24 PM MST | Flash Flood Warning | VEF | Mohave | 111 min |
| Jul 31, 4:15 PM MST | Flash Flood Warning | VEF | Mohave | 2 hr |
| Jul 31, 4:29 PM MST | Flash Flood Warning | VEF | Mohave | 2 hr |
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.