Alert archive / Arizona / Flash Flood Warnings in 2012
Flash Flood Warning 138, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Aug 20, 2012, 8:01 PM MST for Mohave County, Arizona. It was in force for 119 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, 8:01 PM MST (03:01 UTC)
- Expired
- Aug 20, 2012, 10:00 PM MST
- In force
- 119 min
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
- Flood severity
- None
County Mohave County, AZ
The radar
The Las Vegas radar (KESX), 88 km from the middle of the area, began a volume at 03:01 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, 8:08 PM MST | HEAVY RAIN 0 | 2 Sw Kingman, AZ | TRAINED SPOTTER REPORTED VERY HEAVY RAIN AND 4 INCHES OF WATER ON HUALAPAI ROAD. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Las Vegas, NV (KVEF), launched 00:00Z, 3.0 hours before the alert went out and 181 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
- 633 J/kg
- Mixed-layer CIN
- -150 J/kg
- Mixed-layer LCL
- 2388 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- 43 m²/s²
- 0-3 km storm-relative helicity
- 30 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
483
WGUS55 KVEF 210301
FFWVEF
AZC015-210500-
/O.NEW.KVEF.FF.W.0138.120821T0301Z-120821T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
801 PM MST MON AUG 20 2012
THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A
* FLASH FLOOD WARNING FOR...
CENTRAL MOHAVE COUNTY IN NORTHWEST ARIZONA...
* UNTIL 1000 PM MST.
* AT 753 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
VERY HEAVY RAIN FROM A THUNDERSTORM NEAR GOLDEN VALLEY AND
KINGMAN. THE STORM PRODUCING VERY HEAVY RAIN WAS NEARLY STATIONARY.
* LOCATIONS IMPACTED INCLUDE...
GOLDEN VALLEY AND KINGMAN.
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.
&&
LAT...LON 3530 11424 3531 11400 3518 11395 3519 11408
3515 11409 3517 11421
$$
JS2 follow-up statements
433
WGUS75 KVEF 210410
FFSVEF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
910 PM MST MON AUG 20 2012
AZC015-210500-
/O.CON.KVEF.FF.W.0138.000000T0000Z-120821T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MOHAVE AZ-
910 PM MST MON AUG 20 2012
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1000 PM MST FOR
CENTRAL MOHAVE COUNTY...
AT 857 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A THUNDERSTORM PRODUCING MODERATE TO HEAVY RAIN WITH RADAR
RAINFALL ESTIMATES OF GREATER THAN ONE INCH IN THE PAST HOUR. RAIN
GAGE AMOUNTS OF A HALF INCH OR MORE WERE REPORTED IN A 30 MINUTE
PERIOD. THIS STORM WAS LOCATED OVER KINGMAN AND WAS NEARLY
STATIONARY.
LOCATIONS IMPACTED INCLUDE...
GOLDEN VALLEY...KINGMAN...ANDY DEVINE ROAD...STOCKTON ROAD AND
HIGHWAY 93 IN OR NEAR KINGMAN.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FLASH FLOODING IS EXPECTED ON AREA ROADWAYS...AROUND UNDERPASSES...
AND IN NORMALLY DRY WASHES AND LOW LYING AREAS. FLASH FLOODING IS
NATURES NUMBER ONE KILLER. NEVER TRY TO CROSS A FLOODED ROADWAY OR
WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN!
REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL
WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER HASHTAG...
NWSVEGAS.
&&
LAT...LON 3530 11424 3531 11400 3518 11395 3519 11408
3515 11409 3517 11421
$$
JS814
WGUS75 KVEF 210506
FFSVEF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
1006 PM MST MON AUG 20 2012
AZC015-210513-
/O.EXP.KVEF.FF.W.0138.000000T0000Z-120821T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MOHAVE AZ-
1006 PM MST MON AUG 20 2012
...THE FLASH FLOOD WARNING HAS EXPIRED FOR CENTRAL MOHAVE COUNTY...
RAIN HAS ENDED IN THE WARNED AREA AND THE WARNING IS NO LONGER IN
EFFECT. HOWEVER...FLOODING RELATED PROBLEMS WILL CONTINUE THROUGH
THE EVENING WITH SOME ROADS REMAINING IMPASSABLE DUE TO THE FLOOD
WATERS. MOTORISTS ARE URGED TO AVOID FLOODED AREAS UNTIL WATER HAS
RECEDED.
LAT...LON 3530 11424 3531 11400 3518 11395 3519 11408
3515 11409 3517 11421
$$
JSThe 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, 6:09 PM MST | Flash Flood Warning | VEF | Mohave | 2 hr |
| Aug 20, 7:37 PM MST | Flash Flood Warning | VEF | Mohave | 4 hr |
| 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.