Alert archive / Arizona / Flash Flood Warnings in 2012
Flash Flood Warning 133, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Aug 20, 2012, 3:20 PM MST for Mohave County, Arizona. It was in force for 98 min. 1 report 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, 3:20 PM MST (22:20 UTC)
- Expired
- Aug 20, 2012, 4:58 PM MST
- In force
- 98 min
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
- Flood severity
- None
County Mohave County, AZ
The radar
The Cedar City radar (KICX), 152 km from the middle of the area, began a volume at 22:22 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 20, 3:56 PM MST | FLASH FLOOD | 10 W Mt. Trumbull, AZ | PUBLIC REPORTED THAT SEVERAL ROADS ON THE WAY TO THE BAR TEN RANCH WERE WASHED OUT DUE TO FLASH FLOODING. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Flgstf/Belemont, AZ (KFGZ), launched 12:00Z, 10.3 hours before the alert went out and 176 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
- 808 J/kg
- Mixed-layer CIN
- -28 J/kg
- Mixed-layer LCL
- 974 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 41 m²/s²
- 0-3 km storm-relative helicity
- 5 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
860 WGUS55 KVEF 202220 FFWVEF AZC015-210015- /O.NEW.KVEF.FF.W.0133.120820T2220Z-120821T0015Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 320 PM MST MON AUG 20 2012 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A * FLASH FLOOD WARNING FOR... EAST CENTRAL MOHAVE COUNTY IN NORTHWEST ARIZONA... * UNTIL 515 PM MST. * AT 311 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN FROM A THUNDERSTORM NEAR BAR TEN RANCH...OR 50 MILES SOUTH OF COLORADO CITY...MOVING WEST AT 5 MPH. * 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 3617 11335 3642 11331 3638 11318 3617 11320 $$ ASG
2 follow-up statements
936 WGUS75 KVEF 202251 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 351 PM MST MON AUG 20 2012 AZC015-210015- /O.CON.KVEF.FF.W.0133.000000T0000Z-120821T0015Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MOHAVE AZ- 351 PM MST MON AUG 20 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 515 PM MST FOR EAST CENTRAL MOHAVE COUNTY... AT 345 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A THUNDERSTORM PRODUCING VERY HEAVY RAIN WHICH IS LIKELY PRODUCING FLASH FLOODING. THIS STORM WAS LOCATED NEAR THE BAR TEN RANCH...OR 52 MILES SOUTH OF COLORADO CITY...MOVING WEST AT 5 MPH. LOCATIONS IMPACTED INCLUDE... MAINLY RURAL AREAS OF CENTRAL MOHAVE COUNTY...BAR TEN RANCH. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON AREA ROADWAYS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. TO ESCAPE RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN! REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER HASHTAG... NWSVEGAS. && LAT...LON 3617 11335 3642 11331 3638 11318 3617 11320 $$ ASG
634 WGUS75 KVEF 202358 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 458 PM MST MON AUG 20 2012 AZC015-210006- /O.CAN.KVEF.FF.W.0133.000000T0000Z-120821T0015Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MOHAVE AZ- 458 PM MST MON AUG 20 2012 ...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR EAST CENTRAL MOHAVE COUNTY... HEAVY RAIN HAS ENDED ACROSS THE WARNED AREA...ADDITIONAL RUNOFF MAY CONTINUE THROUGH 600 PM. HOWEVER THE THREAT OF ADDITIONAL FLOODING HAS ENDED. LAT...LON 3617 11335 3642 11331 3638 11318 3617 11320 $$ ASG
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 20, 2:24 PM MST | Flash Flood Warning | VEF | Mohave | 75 min |
| Aug 20, 2:34 PM MST | Severe Thunderstorm Warning | VEF | Mohave | 41 min |
| Aug 20, 2:42 PM MST | Flash Flood Warning | VEF | Mohave | 2 hr |
| Aug 20, 4:14 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.