Alert archive / Arizona / Flash Flood Warnings in 2011
Flash Flood Warning 46, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Jul 8, 2011, 3:35 PM MST for Mohave County, Arizona; San Bernardino County, California. It was in force for 66 min. 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 8, 2011, 3:35 PM MST (22:35 UTC)
- Expired
- Jul 8, 2011, 4:41 PM MST
- In force
- 66 min
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
- Flood severity
- None
Counties Mohave County, AZ, San Bernardino County, CA
The radar
The Las Vegas radar (KESX), 88 km from the middle of the area, began a volume at 22:38 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, 10.6 hours before the alert went out and 180 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
- 44 J/kg
- Mixed-layer CIN
- -297 J/kg
- Mixed-layer LCL
- 2374 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- -27 m²/s²
- 0-3 km storm-relative helicity
- 39 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
056 WGUS55 KVEF 082235 FFWVEF AZC015-CAC071-090030- /O.NEW.KVEF.FF.W.0046.110708T2235Z-110709T0030Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 335 PM MST FRI JUL 8 2011 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A * FLASH FLOOD WARNING FOR... EXTREME SOUTHWESTERN MOHAVE COUNTY IN NORTHWEST ARIZONA... EXTREME EAST CENTRAL SAN BERNARDINO COUNTY IN SOUTHERN CALIFORNIA... * UNTIL 530 PM MST/530 PM PDT/. * AT 329 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN FROM A THUNDERSTORM NEAR MOHAVE VALLEY...OR 15 MILES SOUTH OF BULLHEAD CITY. THE STORM PRODUCING VERY HEAVY RAIN WAS NEARLY STATIONARY. * LOCATIONS IMPACTED INCLUDE...MOHAVE VALLEY AND WILLOW VALLEY. 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 TWITTER #NWSVEGAS. && LAT...LON 3499 11467 3499 11452 3487 11452 3487 11466 $$ SC
1 follow-up statement
970 WGUS75 KVEF 082341 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 441 PM MST FRI JUL 8 2011 AZC015-CAC071-082349- /O.CAN.KVEF.FF.W.0046.000000T0000Z-110709T0030Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MOHAVE AZ-SAN BERNARDINO CA- 441 PM MST FRI JUL 8 2011 ...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR EXTREME EAST CENTRAL SAN BERNARDINO AND EXTREME SOUTHWESTERN MOHAVE COUNTIES... THE STRONG THUNDERSTORM THAT PROMPTED THE WARNING HAS DIMINISHED AND ONLY LIGHT RAINFALL PERSISTS. HOWEVER...WASHES MAY REMAIN ELEVATED THROUGH 530 PM DUE TO THE EARLIER HEAVY RAIN AND TRAVELERS SHOULD CONTINUE TO USE CAUTION WHILE OUT ON AREA ROADWAYS. LAT...LON 3499 11467 3499 11452 3487 11452 3487 11466 $$ JS
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 8, 10:55 AM MST | Areal Flood Advisory | VEF | Mohave | 78 min |
| Jul 8, 11:27 AM MST | Flash Flood Warning | VEF | Mohave | 2 hr |
| Jul 8, 11:34 AM MST | Severe Thunderstorm Warning | VEF | Mohave | 41 min |
| Jul 8, 12:52 PM MST | Flash Flood Warning | VEF | Mohave | 113 min |
| Jul 8, 2:25 PM MST | Severe Thunderstorm Warning | VEF | Mohave | 50 min |
| Jul 8, 3:36 PM MST | Areal Flood Advisory | VEF | Mohave | 3 hr |
| Jul 7, 5:57 PM MST | Flash Flood Warning | VEF | Inyo | 3 hr |
| Jul 7, 6:05 PM MST | Areal Flood Advisory | VEF | San Bernardino | 56 min |
| Jul 8, 1:24 PM MST | Areal Flood Advisory | VEF | San Bernardino | 3 hr |
| Jul 8, 2:26 PM MST | Flash Flood Warning | VEF | San Bernardino | 79 min |
| Jul 8, 3:10 PM MST | Flash Flood Warning | VEF | Inyo | 2 hr |
| Jul 8, 3:32 PM MST | Areal Flood Advisory | VEF | Inyo | 118 min |
| Jul 8, 4:18 PM MST | Areal Flood Advisory | VEF | Inyo | 117 min |
Nearby
Flash Flood Warnings in Arizona, 2011Flash Flood Warnings in California, 2011Every flash flood warning in 2011
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.