Alert archive / Nevada / Flash Flood Warnings in 2012
Flash Flood Warning 77, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Jul 31, 2012, 2:42 PM PDT for Clark County, Nevada; Mohave County, Arizona. It was in force for 3 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
- Jul 31, 2012, 2:42 PM PDT (21:42 UTC)
- Expired
- Jul 31, 2012, 5:35 PM PDT
- In force
- 3 hr
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
- Flood severity
- None
Counties Mohave County, AZ, Clark County, NV
The radar
The Las Vegas radar (KESX), 67 km from the middle of the area, began a volume at 21:44 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 |
|---|---|---|---|
| Jul 31, 2:50 PM PDT | FLASH FLOOD | 1 Nw Bullhead City, NV | CASINO RIVER DRIVE IN LAUGHLIN WAS FLOODED WITH AT LEAST 6 INCHES OF WATER. |
| Jul 31, 4:20 PM PDT | FLASH FLOOD | 1 Wnw Bullhead City, NV | LAUGHLIN FIRE DEPARTMENT REPORTED WATER WASHED DEBRIS ONTO THE ROAD AT THE INTERSECTION OF BRUCE WOODBURY DRIVE AND THOMAS EDISON DRIVE. |
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 12:00Z, 9.7 hours before the alert went out and 162 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
- 121 J/kg
- Mixed-layer CIN
- -75 J/kg
- Mixed-layer LCL
- 1334 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- -5 m²/s²
- 0-3 km storm-relative helicity
- -43 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
145 WGUS55 KVEF 312142 FFWVEF AZC015-NVC003-312345- /O.NEW.KVEF.FF.W.0077.120731T2142Z-120731T2345Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 242 PM MST TUE JUL 31 2012 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A * FLASH FLOOD WARNING FOR... WEST CENTRAL MOHAVE COUNTY IN NORTHWEST ARIZONA... EXTREME SOUTH CENTRAL CLARK COUNTY IN SOUTHERN NEVADA... * UNTIL 445 PM MST/445 PM PDT/. * AT 235 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN FROM A THUNDERSTORM NEAR BULLHEAD CITY...MOVING NORTHWEST AT 20 MPH. THIS STORM HAS A HISTORY OF PRODUCING INTENSE RAINFALL. * LOCATIONS IMPACTED INCLUDE... BULLHEAD CITY AND LAUGHLIN. 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 3521 11465 3523 11441 3515 11434 3505 11463 $$ SC
3 follow-up statements
555 WGUS75 KVEF 312246 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 346 PM MST TUE JUL 31 2012 AZC015-NVC003-312345- /O.CON.KVEF.FF.W.0077.000000T0000Z-120731T2345Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MOHAVE AZ-CLARK NV- 346 PM MST TUE JUL 31 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 445 PM MST/445 PM PDT/ FOR EXTREME SOUTH CENTRAL CLARK AND WEST CENTRAL MOHAVE COUNTIES... AT 338 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE HEAVIEST RAINFALL HAS MOVED TO THE NORTH...BUT LIGHT TO MODERATE RAIN CONTINUED IN THE VICINITY OF BULLHEAD CITY AND LAUGHLIN. INTENSE RAINFALL WAS MEASURED BY ONE RAIN GAGE IN LAUGHLIN AROUND 3 PM...RECEIVING 0.67 INCHES ON 10 MINUTES. THE GENERAL PUBLIC REPORTED FLASH FLOODING ONGOING IN LAUGHLIN. LOCATIONS IMPACTED INCLUDE...BULLHEAD CITY AND LAUGHLIN. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON AREA ROADWAYS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. TO ESCAPE RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN! REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER HASHTAG... NWSVEGAS. && LAT...LON 3521 11465 3523 11441 3515 11434 3505 11463 $$ SC
634 WGUS55 KVEF 312345 FFWVEF AZC015-NVC003-010145- /O.EXT.KVEF.FF.W.0077.000000T0000Z-120801T0145Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 445 PM MST TUE JUL 31 2012 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS EXTENDED THE * FLASH FLOOD WARNING FOR... WEST CENTRAL MOHAVE COUNTY IN NORTHWEST ARIZONA... EXTREME SOUTH CENTRAL CLARK COUNTY IN SOUTHERN NEVADA... * UNTIL 645 PM MST/645 PM PDT/. * AT 436 PM MST...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED FLASH FLOODING CONTINUING ACROSS PORTIONS OF LAUGHLIN AND BULLHEAD CITY. FLOODING WAS REPORTED ALONG CASINO DRIVE IN LAUGHLIN... NUMEROUS LOCATIONS IN BULLHEAD CITY HAD REPORTS OF WATER AND ROCKS ACROSS THE ROADWAY. WATER WAS REPORTED ACROSS PORTIONS OF HIGHWAY 68. * LOCATIONS IMPACTED INCLUDE... LAUGHLIN AND BULLHEAD CITY 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 3521 11465 3523 11441 3515 11434 3505 11463 $$ SC
402 WGUS75 KVEF 010035 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 535 PM MST TUE JUL 31 2012 AZC015-NVC003-010033- /O.CAN.KVEF.FF.W.0077.000000T0000Z-120801T0145Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MOHAVE AZ-CLARK NV- 535 PM MST TUE JUL 31 2012 ...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR EXTREME SOUTH CENTRAL CLARK AND WEST CENTRAL MOHAVE COUNTIES... NATIONAL WEATHER SERVICE RADAR INDICATES ALL OF THE RAIN HAS MOVED TO THE NORTH OF THE AREA. LOCAL PUBLIC OFFICIALS INDICATE THAT THE FLOODING HAD ENDED. THEREFORE...THE FLASH FLOOD WARNING FOR THE BULLHEAD CITY AND LAUGHLIN AREA HAS BEEN CANCELLED. LAT...LON 3521 11465 3523 11441 3515 11434 3505 11463 $$ SC
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 31, 2:29 AM PDT | Flash Flood Watch | VEF | Clark | 19 hr |
| Jul 31, 6:39 AM PDT | Areal Flood Advisory | VEF | Clark | 51 min |
| Jul 31, 2:33 PM PDT | Flash Flood Warning | VEF | Clark, Nye | 117 min |
| Jul 31, 4:37 PM PDT | Flash Flood Warning | VEF | Clark | 113 min |
| Jul 31, 12:14 PM PDT | Areal Flood Advisory | VEF | Mohave | 83 min |
| Jul 31, 1:55 PM PDT | Flash Flood Warning | VEF | Mohave | 2 hr |
| Jul 31, 2:21 PM PDT | Flash Flood Warning | VEF | Mohave | 114 min |
| Jul 31, 2:48 PM PDT | Flash Flood Warning | VEF | Mohave | 3 hr |
| Jul 31, 3:12 PM PDT | Areal Flood Advisory | VEF | Mohave | 113 min |
| Jul 31, 3:24 PM PDT | Flash Flood Warning | VEF | Mohave | 111 min |
| Jul 31, 4:15 PM PDT | Flash Flood Warning | VEF | Mohave | 2 hr |
| Jul 31, 4:29 PM PDT | Flash Flood Warning | VEF | Mohave | 2 hr |
Nearby
Flash Flood Warnings in Nevada, 2012Flash 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.