Alert archive / Arizona / Flash Flood Warnings in 2012
Flash Flood Warning 135, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Aug 20, 2012, 6:09 PM MST for Mohave County, Arizona. It was in force for 2 hr. 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, 6:09 PM MST (01:09 UTC)
- Expired
- Aug 20, 2012, 8:10 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), 154 km from the middle of the area, began a volume at 01:10 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, 6:15 PM MST | HEAVY RAIN 1.42 | 7 Wsw Wikieup, AZ | A MOHAVE COUNTY ALERT GAUGE LOCATED ON TOP OF AUBREY PEAK MEASURED A 30 MINUTE RAINFALL TOTAL OF 1.42 INCHES. |
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 00:00Z, 1.2 hours before the alert went out and 185 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
- 217 J/kg
- Mixed-layer CIN
- -45 J/kg
- Mixed-layer LCL
- 1521 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- -9 m²/s²
- 0-3 km storm-relative helicity
- 19 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
651 WGUS55 KVEF 210109 FFWVEF AZC015-210315- /O.NEW.KVEF.FF.W.0135.120821T0109Z-120821T0315Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 609 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 815 PM MST. * AT 559 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN FROM A THUNDERSTORM 7 MILES SOUTHWEST OF WIKIEUP. THE STORM PRODUCING VERY HEAVY 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 3477 11383 3479 11361 3459 11353 3456 11380 $$ ASG
2 follow-up statements
530 WGUS75 KVEF 210153 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 653 PM MST MON AUG 20 2012 AZC015-210315- /O.CON.KVEF.FF.W.0135.000000T0000Z-120821T0315Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MOHAVE AZ- 653 PM MST MON AUG 20 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 815 PM MST FOR SOUTH CENTRAL MOHAVE COUNTY... AT 644 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A THUNDERSTORM PRODUCING VERY HEAVY RAIN...MAINLY WEST OF WIKIEUP OVER THE HUALAPAI MOUNTAINS. RUNOFF FROM THIS STORM IS LIKELY TO AFFECT CHICKEN SPRINGS ROAD WHICH LEADS INTO WIKIEUP. THE THUNDERSTORM WITH EXCESSIVE RAIN WAS MOVING SLOWLY WEST. LOCATIONS IMPACTED INCLUDE... WIKIEUP...CHICKEN SPRINGS ROAD. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON AREA ROADWAYS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. TO ESCAPE RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN! REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER HASHTAG... NWSVEGAS. && LAT...LON 3477 11383 3479 11361 3459 11353 3456 11380 $$ ASG
139 WGUS75 KVEF 210310 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 810 PM MST MON AUG 20 2012 AZC015-210315- /O.CAN.KVEF.FF.W.0135.000000T0000Z-120821T0315Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MOHAVE AZ- 810 PM MST MON AUG 20 2012 ...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR SOUTH CENTRAL MOHAVE COUNTY... THUNDERSTORMS NEAR WIKIEUP HAVE DISSIPATED AND FLASH FLOODING IS NO LONGER EXPECTED. HOWEVER DUE TO THE AMOUNT OF RAIN THAT FELL EARLIER...MOTORISTS SHOULD USE CAUTION WHILE TRAVELING ALONG CHICKEN RANCH ROAD WEST OF WIKIEUP THIS EVENING AND BE ALERT FOR WATER OVER THE ROADWAY AND OTHER POTENTIAL PROBLEMS CAUSED BY THE EARLIER HEAVY RAIN. LAT...LON 3477 11383 3479 11361 3459 11353 3456 11380 $$ JS
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 20, 5:51 PM MST | Severe Thunderstorm Warning | VEF | Mohave | 39 min |
| Aug 20, 7:37 PM MST | Flash Flood Warning | VEF | Mohave | 4 hr |
| Aug 20, 8:01 PM MST | Flash Flood Warning | VEF | Mohave | 119 min |
| Aug 21, 11:39 AM MST | Flash Flood Watch | VEF | Mohave | 36 hr |
| Aug 21, 1:43 PM MST | Severe Thunderstorm Warning | VEF | Mohave | 32 min |
| Aug 21, 3:16 PM MST | Flash Flood Warning | VEF | Mohave | 119 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.