Alert archive / Arizona / Flash Flood Warnings in 2012
Flash Flood Warning 134, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Aug 20, 2012, 4:14 PM MST for Mohave County, Arizona. It was in force for 2 hr. 2 reports 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, 4:14 PM MST (23:14 UTC)
- Expired
- Aug 20, 2012, 6:15 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), 160 km from the middle of the area, began a volume at 23:16 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, 4:32 PM MST | HEAVY RAIN 1.1 | Wikieup, AZ | A MOHAVE COUNTY ALERT GAUGE REPORTED 1.10 INCHES OF RAIN FELL BETWEEN 400 PM AND 430 PM. |
| Aug 20, 5:18 PM MST | FLASH FLOOD | Ne Wikieup, AZ | MOHAVE COUNTY SHERIFF REPORTED LOTS OF MUD AND DEBRIS AT CHICKEN SPRINGS ROAD AND US 93. THEY ALSO STATED THAT ADOT WAS ON THE WAY TO CLEAR THE ROAD. |
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, 11.2 hours before the alert went out and 172 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.
193 WGUS55 KVEF 202314 FFWVEF AZC015-210115- /O.NEW.KVEF.FF.W.0134.120820T2314Z-120821T0115Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 414 PM MST MON AUG 20 2012 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A * FLASH FLOOD WARNING FOR... SOUTH CENTRAL MOHAVE COUNTY IN NORTHWEST ARIZONA... * UNTIL 615 PM MST. * AT 407 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN FROM A THUNDERSTORM NEAR WIKIEUP. THE STORM PRODUCING VERY HEAVY RAIN WAS NEARLY STATIONARY. * LOCATIONS IMPACTED INCLUDE... WIKIEUP. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED ON AREA ROADWAYS...AROUND UNDERPASSES... AND IN NORMALLY DRY WASHES AND LOW LYING AREAS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. 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. 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 3482 11354 3462 11350 3461 11367 3479 11371 $$ ASG
3 follow-up statements
124 WGUS75 KVEF 202331 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 431 PM MST MON AUG 20 2012 AZC015-210115- /O.CON.KVEF.FF.W.0134.000000T0000Z-120821T0115Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MOHAVE AZ- 431 PM MST MON AUG 20 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 615 PM MST FOR SOUTH CENTRAL MOHAVE COUNTY... AT 424 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A THUNDERSTORM PRODUCING VERY HEAVY RAIN. AN AUTOMATED RAIN GAUGE IN WIKIEUP HAS REPORTED 1.10 INCHES OF RAIN IN A 30 MINUTE PERIOD. THIS STORM WAS LOCATED NEAR WIKIEUP. THE THUNDERSTORM WITH EXCESSIVE RAIN WAS NEARLY STATIONARY. LOCATIONS IMPACTED INCLUDE... WIKIEUP PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON AREA ROADWAYS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. TO ESCAPE RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN! REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER HASHTAG... NWSVEGAS. && LAT...LON 3482 11354 3462 11350 3461 11367 3479 11371 $$ ASG
949 WGUS75 KVEF 210026 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 526 PM MST MON AUG 20 2012 AZC015-210115- /O.CON.KVEF.FF.W.0134.000000T0000Z-120821T0115Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MOHAVE AZ- 526 PM MST MON AUG 20 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 615 PM MST FOR SOUTH CENTRAL MOHAVE COUNTY... AT 516 PM MST...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED FLASH FLOODING FROM A THUNDERSTORM IN WIKIEUP. LAW ENFORCEMENT ALSO STATED THAT THERE WAS LOT OF MUD AND DEBRIS AT CHICKEN SPRINGS ROAD AND HIGHWAY 93. HEAVY RAIN IN WIKIEUP HAS DIMINISHED...BUT THE ADDITIONAL THREAT OF SIGNIFICANT RUNOFF WILL LIKELY CONTINUE THROUGH 600 PM. LOCATIONS IMPACTED INCLUDE... WIKIEUP. 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 3482 11354 3462 11350 3461 11367 3479 11371 $$ ASG
438 WGUS75 KVEF 210111 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 611 PM MST MON AUG 20 2012 AZC015-210120- /O.EXP.KVEF.FF.W.0134.000000T0000Z-120821T0115Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MOHAVE AZ- 611 PM MST MON AUG 20 2012 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 615 PM MST FOR SOUTH CENTRAL MOHAVE COUNTY... A NEW THUNDERSTORM HAS DEVELOPED OVER THE AREA THAT HAS ALEADY RECEIVED FLOODING. THIS WARNING WAS REPLACED WITH A NEW WARNING FOR THE SAME AREA. LAT...LON 3482 11354 3462 11350 3461 11367 3479 11371 $$ 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, 3:20 PM MST | Flash Flood Warning | VEF | Mohave | 98 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.