Alert archive / Nevada / Flash Flood Warnings in 2011
Flash Flood Warning 43, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Jul 8, 2011, 1:08 PM PDT for Clark County, Nevada. It was in force for 112 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, 1:08 PM PDT (20:08 UTC)
- Expired
- Jul 8, 2011, 3:00 PM PDT
- In force
- 112 min
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
- Flood severity
- None
County Clark County, NV
The radar
The Las Vegas radar (KESX), 30 km from the middle of the area, began a volume at 20:11 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, 8.1 hours before the alert went out and 113 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.
571 WGUS55 KVEF 082008 FFWVEF NVC003-082200- /O.NEW.KVEF.FF.W.0043.110708T2008Z-110708T2200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 108 PM PDT FRI JUL 8 2011 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A * FLASH FLOOD WARNING FOR... SOUTH CENTRAL CLARK COUNTY IN SOUTHERN NEVADA... * UNTIL 300 PM PDT. * AT 100 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN FROM A THUNDERSTORM 8 MILES WEST OF SEARCHLIGHT... MOVING SOUTHEAST AT 5 MPH. * LOCATIONS IMPACTED INCLUDE...CAL NEV ARI AND SEARCHLIGHT...NIPTON ROAD AND HIGHWAY 95 FROM SEARCHLIGHT SOUTH TO THE BORDER. 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 3555 11513 3548 11487 3526 11484 3543 11515 $$ SC
2 follow-up statements
808 WGUS75 KVEF 082047 RRA FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 147 PM PDT FRI JUL 8 2011 NVC003-082200- /O.CON.KVEF.FF.W.0043.000000T0000Z-110708T2200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CLARK NV- 147 PM PDT FRI JUL 8 2011 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 300 PM PDT FOR SOUTH CENTRAL CLARK COUNTY... AT 145 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A THUNDERSTORM PRODUCING VERY HEAVY RAIN. THIS STORM WAS LOCATED NEAR CAL NEV ARI...OR 9 MILES SOUTH OF SEARCHLIGHT...MOVING SOUTHEAST AT 5 MPH. A RAIN GAGE NEAR SEARCHLIGHT RECEIVED 0.98 INCHES OF RAIN IN THIRTY MINUTES. ADDITIONAL THUNDERSTORMS HAVE DEVELOPED ON THE EAST SIDE OF HIGHWAY 95...ALSO PRODUCING VERY HEAVY RAIN. LOCATIONS IMPACTED INCLUDE...CAL NEV ARI AND SEARCHLIGHT. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON AREA ROADWAYS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. TO ESCAPE RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN! REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL WEATHER SERVICE FACEBOOK PAGE OR TWITTER #NWSVEGAS. && LAT...LON 3555 11513 3548 11487 3526 11484 3543 11515 $$ SC
690 WGUS75 KVEF 082155 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 255 PM PDT FRI JUL 8 2011 NVC003-082202- /O.EXP.KVEF.FF.W.0043.000000T0000Z-110708T2200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CLARK NV- 255 PM PDT FRI JUL 8 2011 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 300 PM PDT FOR SOUTH CENTRAL CLARK COUNTY... THE FLASH FLOOD WARNING FOR SOUTH CENTRAL CLARK COUNTY WILL BE ALLOWED TO EXPIRE AT 300 PM. THE HEAVY RAIN HAS MOVED TO THE SOUTH AND THE IMMEDIATE THREAT OF FLASH FLOODING HAS ENDED. LINGERING MINOR FLOODING MAY PERSIST AS RUNOFF CONTINUES TO DIMINISH... PARTICULARLY ALONG NIPTON ROAD. LAT...LON 3555 11513 3548 11487 3526 11484 3543 11515 $$ SC
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 7, 6:43 PM PDT | Areal Flood Advisory | VEF | Clark | 107 min |
| Jul 7, 7:33 PM PDT | Areal Flood Advisory | VEF | Clark | 48 min |
| Jul 8, 12:21 PM PDT | Flash Flood Warning | VEF | Clark | 70 min |
| Jul 8, 12:29 PM PDT | Areal Flood Advisory | VEF | Clark | 46 min |
| Jul 8, 2:33 PM PDT | Severe Thunderstorm Warning | VEF | Clark | 29 min |
| Jul 8, 2:45 PM PDT | Areal Flood Advisory | VEF | Clark | 57 min |
Nearby
Flash 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.