Alert archive / Nevada / Flash Flood Warnings in 2012
Flash Flood Warning 169, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Aug 25, 2012, 2:38 PM PDT for Clark County, Nevada. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 25, 2012, 2:38 PM PDT (21:38 UTC)
- Expired
- Aug 25, 2012, 4:45 PM PDT
- In force
- 2 hr
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
- Flood severity
- None
County Clark County, NV
The radar
The Las Vegas radar (KESX), 73 km from the middle of the area, began a volume at 21:39 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 12:00Z, 9.6 hours before the alert went out and 28 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
- 86 J/kg
- Mixed-layer CIN
- -200 J/kg
- Mixed-layer LCL
- 2441 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- -3 m²/s²
- 0-3 km storm-relative helicity
- -37 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
946 WGUS55 KVEF 252138 FFWVEF NVC003-252345- /O.NEW.KVEF.FF.W.0169.120825T2138Z-120825T2345Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 238 PM PDT SAT AUG 25 2012 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A * FLASH FLOOD WARNING FOR... WEST CENTRAL CLARK COUNTY IN SOUTHERN NEVADA... * UNTIL 445 PM PDT. * AT 234 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN FROM A THUNDERSTORM NEAR RED ROCK CANYON. THE STORM PRODUCING VERY HEAVY RAIN WAS NEARLY STATIONARY. THE NATIONAL PARK SERVICE REPORTED THAT THE RED ROCK SCENIC LOOP WAS FLOODED AND CLOSED. * LOCATIONS IMPACTED INCLUDE... RED ROCK CANYON...ROCKY GAP CAMPGROUND...RED ROCK CANYON CAMPGROUND AND LOVELL CANYON 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 BY USING THE TWITTER HASHTAG... NWSVEGAS. && LAT...LON 3620 11560 3620 11538 3602 11538 3602 11560 $$ MORGAN
2 follow-up statements
300 WGUS75 KVEF 252236 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 336 PM PDT SAT AUG 25 2012 NVC003-252345- /O.CON.KVEF.FF.W.0169.000000T0000Z-120825T2345Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CLARK NV- 336 PM PDT SAT AUG 25 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 445 PM PDT FOR WEST CENTRAL CLARK COUNTY... AT 330 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT THE THUNDERSTORM OVER RED ROCK CANYON HAD DISSIPATED. HOWEVER...THE NATIONAL PARK SERVICE REPORTED THAT THE RED ROCK SCENIC LOOP REMAINED CLOSED DUE TO FLOODING...SO THE WARNING WILL CONTINUE UNTIL 445 PM PDT. LOCATIONS IMPACTED INCLUDE... THE RED ROCK SCENIC LOOP. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON AREA ROADWAYS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. TO ESCAPE RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN! REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER HASHTAG... NWSVEGAS. && LAT...LON 3620 11560 3620 11538 3602 11538 3602 11560 $$ MORGAN
784 WGUS75 KVEF 252337 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 437 PM PDT SAT AUG 25 2012 NVC003-252345- /O.EXP.KVEF.FF.W.0169.000000T0000Z-120825T2345Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CLARK NV- 437 PM PDT SAT AUG 25 2012 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 445 PM PDT FOR WEST CENTRAL CLARK COUNTY... AT 435 PM PDT...RADAR INDICATED ONLY LIGHT RAIN IN THE RED ROCK CANYON AREA. THEREFORE...THE FLASH FLOOD WARNING WILL BE ALLOWED TO EXPIRE AT 445 PM PDT. THE NATIONAL PARK SERVICE REPORTED THAT THE RED ROCK SCENIC LOOP WAS STILL CLOSED. LAT...LON 3620 11560 3620 11538 3602 11538 3602 11560 $$ MORGAN
Nearby
Flash Flood Warnings in Nevada, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.