Alert archive / Arizona / Flash Flood Warnings in 2011
Flash Flood Warning 34, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Jul 7, 2011, 3:35 PM MST for Mohave County, Arizona; Clark County, Nevada. It was in force for 114 min. 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 7, 2011, 3:35 PM MST (22:35 UTC)
- Expired
- Jul 7, 2011, 5:29 PM MST
- In force
- 114 min
- 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), 38 km from the middle of the area, began a volume at 22:39 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 7, 3:39 PM MST | FLASH FLOOD | 1 Se Boulder City, NV | SPOTTER REPORTS SIX INCHES OF WATER AND ROCKS ACROSS HIGHWAY 93 AT SEVERAL PLACES IN BOULDER CITY. |
| Jul 7, 4:10 PM MST | FLASH FLOOD | Boulder City, NV | MUD AND DEBRIS ACROSS THE ROADWAY AT PACIFICA IN BOULDER CITY. |
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, 10.6 hours before the alert went out and 74 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
- 34 J/kg
- Mixed-layer CIN
- -208 J/kg
- Mixed-layer LCL
- 2113 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- -7 m²/s²
- 0-3 km storm-relative helicity
- 114 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
436 WGUS55 KVEF 072235 FFWVEF AZC015-NVC003-080130- /O.NEW.KVEF.FF.W.0034.110707T2235Z-110708T0130Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 335 PM PDT THU JUL 7 2011 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A * FLASH FLOOD WARNING FOR... EXTREME WEST CENTRAL MOHAVE COUNTY IN NORTHWEST ARIZONA... CENTRAL CLARK COUNTY IN SOUTHERN NEVADA... * UNTIL 630 PM PDT/630 PM MST/. * AT 329 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN FROM A LARGE AREA OF THUNDERSTORMS STRETCHING FROM NEAR BOULDER CITY TO NEAR BOULDER BEACH. * LOCATIONS IMPACTED INCLUDE...BOULDER BEACH...BOULDER CITY...HOOVER DAM...LAS VEGAS BAY...HIGHWAY 93 FROM MILE MARKER 59 TO JUST EAST OF THE NEVADA ARIZONA BORDER...LAKE SHORE ROAD...RAILROAD PASS AND BOULDER BEACH CAMPGROUND. 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 TWITTER #NWSVEGAS. && LAT...LON 3614 11485 3602 11470 3589 11482 3600 11495 $$ JGG
3 follow-up statements
226 WGUS75 KVEF 072246 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 346 PM PDT THU JUL 7 2011 AZC015-NVC003-080130- /O.CON.KVEF.FF.W.0034.000000T0000Z-110708T0130Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MOHAVE AZ-CLARK NV- 346 PM PDT THU JUL 7 2011 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 630 PM PDT/630 PM MST/ FOR CENTRAL CLARK AND EXTREME WEST CENTRAL MOHAVE COUNTIES... AT 339 PM PDT...TRAINED WEATHER SPOTTERS REPORTED SIX INCHES OF WATER OVER HIGHWAY 93 IN BOULDER CITY. RADAR CONTINUES TO INDICATE VERY HEAVY RAIN ACROSS ALMOST ALL OF THE AREA FROM BOULDER BEACH TO BOULDER CITY AND SOUTH OF LAS VEGAS BAY. LOCATIONS IMPACTED INCLUDE...BOULDER BEACH...BOULDER CITY...HOOVER DAM...LAS VEGAS BAY...RAILROAD PASS...HIGHWAY 93 FROM MILE MARKER 59 TO JUST EAST OF THE NEVADA ARIZONA BORDER...LAKE SHORE ROAD...AND BOULDER BEACH CAMPGROUND. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED ON AREA ROADWAYS...AROUND UNDERPASSES... AND IN NORMALLY DRY WASHES AND LOW LYING AREAS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. NEVER TRY TO CROSS A FLOODED ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN! REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL WEATHER SERVICE FACEBOOK PAGE OR TWITTER #NWSVEGAS. FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON AREA ROADWAYS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. TO ESCAPE RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN! REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL WEATHER SERVICE FACEBOOK PAGE OR TWITTER #NWSVEGAS. && LAT...LON 3614 11485 3602 11470 3589 11482 3600 11495 $$ JGG
687 WGUS75 KVEF 072340 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 440 PM PDT THU JUL 7 2011 AZC015-NVC003-080130- /O.CON.KVEF.FF.W.0034.000000T0000Z-110708T0130Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MOHAVE AZ-CLARK NV- 440 PM PDT THU JUL 7 2011 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 630 PM PDT/630 PM MST/ FOR CENTRAL CLARK AND EXTREME WEST CENTRAL MOHAVE COUNTIES... AT 435 PM PDT...LOCAL LAW ENFORCEMENT REPORTED MUD AND DEBRIS ACROSS SOME ROADWAYS IN BOULDER CITY. WHILE RAIN HAS ENDED IN THE BOULDER CITY...BOULDER BEACH...AND LAS VEGAS BAY AREAS FOR NOW...ADDITIONAL RAINFALL IS MOVING IN FROM THE SOUTHWEST AND MAY CAUSE ADDITIONAL FLOODING OR AGGRAVATE EXISTING CONDITIONS. LOCATIONS IMPACTED INCLUDE...BOULDER BEACH...BOULDER CITY...HOOVER DAM...LAS VEGAS BAY...RAILROAD PASS AND BOULDER BEACH CAMPGROUND. 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. 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 TWITTER #NWSVEGAS. && LAT...LON 3614 11485 3602 11470 3589 11482 3600 11495 $$ JGG
105 WGUS75 KVEF 080029 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 529 PM PDT THU JUL 7 2011 AZC015-NVC003-080039- /O.CAN.KVEF.FF.W.0034.000000T0000Z-110708T0130Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MOHAVE AZ-CLARK NV- 529 PM PDT THU JUL 7 2011 ...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR CENTRAL CLARK AND EXTREME WEST CENTRAL MOHAVE COUNTIES... RAINFALL HAS ENDED IN THE AREA AND LOCAL LAW ENFORCEMENT REPORT NO CONTINUING FLASH FLOOD PROBLEMS...THEREFORE THE WARNING IS CANCELLED. ADDITIONAL SHOWERS AND STORMS WILL BE POSSIBLE THIS EVENING. LAT...LON 3614 11485 3602 11470 3589 11482 3600 11495 $$ JGG
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 7, 2:54 PM MST | Severe Thunderstorm Warning | VEF | Mohave | 51 min |
| Jul 7, 3:18 PM MST | Severe Thunderstorm Warning | VEF | Mohave | 42 min |
| Jul 7, 3:32 PM MST | Severe Thunderstorm Warning | VEF | Mohave | 43 min |
| Jul 6, 5:48 PM MST | Areal Flood Advisory | VEF | Clark, Nye | 71 min |
| Jul 7, 1:01 PM MST | Areal Flood Advisory | VEF | Clark | 43 min |
| Jul 7, 1:16 PM MST | Flash Flood Warning | VEF | Clark | 119 min |
| Jul 7, 3:01 PM MST | Severe Thunderstorm Warning | VEF | Clark | 33 min |
| Jul 7, 4:26 PM MST | Areal Flood Advisory | VEF | Clark | 74 min |
| Jul 7, 4:29 PM MST | Severe Thunderstorm Warning | VEF | Clark | 46 min |
| Jul 7, 4:37 PM MST | Flash Flood Warning | VEF | Clark | 53 min |
| Jul 7, 4:52 PM MST | Flash Flood Warning | VEF | Clark | 113 min |
Nearby
Flash Flood Warnings in Arizona, 2011Flash Flood Warnings in Nevada, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.