Alert archive / Nevada / Flash Flood Warnings in 2011
Flash Flood Warning 5, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Jul 3, 2011, 7:40 PM PDT for Clark County, Nevada. It was in force for 95 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 3, 2011, 7:40 PM PDT (02:40 UTC)
- Expired
- Jul 3, 2011, 9:15 PM PDT
- In force
- 95 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), 45 km from the middle of the area, began a volume at 02:39 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.
The nearest sounding before it
Las Vegas, NV (KVEF), launched 00:00Z, 2.7 hours before the alert went out and 60 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 5387 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 49 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.
388 WGUS55 KVEF 040240 FFWVEF NVC003-040415- /O.NEW.KVEF.FF.W.0005.110704T0240Z-110704T0415Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 740 PM PDT SUN JUL 3 2011 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A * FLASH FLOOD WARNING FOR... CENTRAL CLARK COUNTY IN SOUTHERN NEVADA... * UNTIL 915 PM PDT. * AT 735 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN FROM A THUNDERSTORM NEAR HENDERSON. THE STORM PRODUCING VERY HEAVY RAIN WAS NEARLY STATIONARY. * LOCATIONS IMPACTED INCLUDE...HENDERSON...LAS VEGAS BAY...RAILROAD PASS...EAST LAS VEGAS...FRENCHMAN MTN...LAS VEGAS BAY CAMPGROUND AND SAM BOYD STADIUM. 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 3621 11502 3615 11484 3593 11487 3600 11508 $$ STACHELSKI
2 follow-up statements
608 WGUS75 KVEF 040328 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 828 PM PDT SUN JUL 3 2011 NVC003-040415- /O.CON.KVEF.FF.W.0005.000000T0000Z-110704T0415Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CLARK NV- 828 PM PDT SUN JUL 3 2011 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 915 PM PDT FOR CENTRAL CLARK COUNTY... AT 825 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE THUNDERSTORMS PRODUCING VERY HEAVY RAIN OVER THE FAR EAST AND SOUTHEAST SIDES OF THE LAS VEGAS VALLEY. THE THUNDERSTORM WITH EXCESSIVE RAIN WAS NEARLY STATIONARY. LOCATIONS IMPACTED INCLUDE...HENDERSON...LAS VEGAS BAY...RAILROAD PASS...EAST LAS VEGAS...FRENCHMAN MTN...LAS VEGAS BAY CAMPGROUND AND SAM BOYD STADIUM. HEAVY RAIN HAS BEEN INDICATED IN THIS AREA BY RADAR ESTIMATES AND AUTOMATED RAIN GUAGES INDICATE AS MUCH AS AN HALF AN INCH OF RAIN HAS FALLEN. IN ADDITION...RUNOFF FROM HEAVIER RAIN THAT FELL OVER THE CENTRAL AND SOUTH-CENTRAL PORTIONS OF THE LAS VEGAS VALLEY WILL BE HEADING IN THIS DIRECTION. THIS WILL RESULT IN ADDITIONAL RISES IN WASHES AND IN OTHER LOW WATER CROSSINGS ON THE EAST AND SOUTHEAST SIDES OF THE LAS VEGAS VALLEY. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED ON AREA ROADWAYS...AROUND UNDERPASSES... AND IN NORMALLY DRY WASHES AND LOW LYING AREAS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. NEVER TRY TO CROSS A FLOODED ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN! REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL WEATHER SERVICE FACEBOOK PAGE OR TWITTER #NWSVEGAS. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL MIDNIGHT PDT MONDAY MORNING FOR SOUTHERN CALIFORNIA. && LAT...LON 3621 11502 3615 11484 3593 11487 3600 11508 $$ STACHELSKI
839 WGUS75 KVEF 040408 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 908 PM PDT SUN JUL 3 2011 NVC003-040416- /O.EXP.KVEF.FF.W.0005.000000T0000Z-110704T0415Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CLARK NV- 908 PM PDT SUN JUL 3 2011 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 915 PM PDT FOR CENTRAL CLARK COUNTY... THE HEAVIEST RAINS HAVE GENERALLY ENDED ACROSS THE EAST AND SOUTHEAST SIDES OF THE LAS VEGAS VALLEY. WHILE THE THREAT OF FLASH FLOODING HAS ENDED...WATER MAY STILL CONTINUE TO LINGER IN LOW LYING SPOTS FOR THE NEXT FEW HOURS AND WASHES MAY STILL HAVE HIGHER THAN NORMAL FLOWS IN THEM. IN ADDITION DRIVERS SHOULD BE ALERT FOR SLICK ROADS IN VENTURING OUT THIS EVENING. LAT...LON 3621 11502 3615 11484 3593 11487 3600 11508 $$ STACHELSKI
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 3, 6:41 PM PDT | Flash Flood Warning | VEF | Clark | 2 hr |
| Jul 3, 6:53 PM PDT | Flash Flood Warning | VEF | Clark | 64 min |
| Jul 3, 7:06 PM PDT | Severe Thunderstorm Warning | VEF | Clark | 54 min |
| Jul 3, 9:46 PM PDT | Areal Flood Advisory | VEF | 119 min | |
| Jul 4, 3:48 PM PDT | Flash Flood Warning | VEF | Esmeralda, Lincoln, Nye | 117 min |
| Jul 4, 4:35 PM PDT | Flash Flood Warning | VEF | Esmeralda, Nye | 115 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.