Alert archive / Nevada / Flash Flood Warnings in 2012
Flash Flood Warning 42, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Jul 15, 2012, 1:12 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
- Jul 15, 2012, 1:12 PM PDT (20:12 UTC)
- Expired
- Jul 15, 2012, 3:15 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), 93 km from the middle of the area, began a volume at 20:15 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, 8.2 hours before the alert went out and 12 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
- 335 J/kg
- Mixed-layer CIN
- -212 J/kg
- Mixed-layer LCL
- 1353 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 22 m²/s²
- 0-3 km storm-relative helicity
- 8 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
412 WGUS55 KVEF 152012 FFWVEF NVC003-152215- /O.NEW.KVEF.FF.W.0042.120715T2012Z-120715T2215Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 112 PM PDT SUN JUL 15 2012 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A * FLASH FLOOD WARNING FOR... WEST CENTRAL CLARK COUNTY IN SOUTHERN NEVADA... * UNTIL 315 PM PDT. * AT 110 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN FROM A THUNDERSTORM NEAR HILLTOP CAMPGROUND...OR NEAR MT. CHARLESTON. THE STORM PRODUCING VERY HEAVY RAIN WAS NEARLY STATIONARY. * LOCATIONS IMPACTED INCLUDE... 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. CAMPERS AND HIKERS SHOULD BE ALERT TO THE POSSIBILITY OF RAPIDLY RISING WATER AND BE PREPARED TO MOVE QUICKLY TO HIGHER GROUND IF FLASH FLOODING IS OBSERVED. && LAT...LON 3642 11571 3642 11549 3611 11549 3611 11572 $$ STACHELSKI
2 follow-up statements
168 WGUS75 KVEF 152103 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 203 PM PDT SUN JUL 15 2012 NVC003-152215- /O.CON.KVEF.FF.W.0042.000000T0000Z-120715T2215Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CLARK NV- 203 PM PDT SUN JUL 15 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 315 PM PDT FOR WEST CENTRAL CLARK COUNTY... AT 155 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE THUNDERSTORMS MOVING SLOWLY NORTH AROUND 5 MPH OVER MT CHARLESTON. HEAVY RAIN WAS REPORTED EARLIER ON MT CHARLESTON WITH RUNOFF CAUSING DEBRIS INCLUDING LARGE ROCKS TO WASH ONTO ROADS. ALTHOUGH RAINFALL IS NOT AS HEAVY AS ABOUT AN HOUR AGO...ADDITIONAL RAINFALL AND RUNOFF FROM EARLIER ACTIVITY WILL STILL RESULT IN FLOODING AS WELL AS THE POTENTIAL FOR DEBRIS TO WASH ONTO ROADS. LOCATIONS IMPACTED INCLUDE... MT CHARLESTON. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON AREA ROADWAYS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. TO ESCAPE RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN! REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER HASHTAG... NWSVEGAS. && LAT...LON 3642 11571 3642 11549 3611 11549 3611 11572 $$ STACHELSKI
767 WGUS75 KVEF 152214 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 314 PM PDT SUN JUL 15 2012 NVC003-152223- /O.EXP.KVEF.FF.W.0042.000000T0000Z-120715T2215Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CLARK NV- 314 PM PDT SUN JUL 15 2012 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 315 PM PDT FOR WEST CENTRAL CLARK COUNTY... HEAVY RAIN HAS ENDED OVER MT. CHARLESTON AND RADAR SHOWED ANY RAIN FALLING ACROSS MT CHARLESTON WAS PRESENTLY LIGHT IN INTENSITY. BE CAREFUL IF TRAVELING IN THIS AREA AS ROADS WILL STILL BE SLICK FROM THE HEAVIER RAIN THAT FELL EARLIER. LAT...LON 3642 11571 3642 11549 3611 11549 3611 11572 $$ STACHELSKI
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 14, 6:02 PM PDT | Areal Flood Advisory | VEF | Clark | 116 min |
| Jul 14, 8:41 PM PDT | Areal Flood Advisory | VEF | Clark | 16 min |
| Jul 14, 8:56 PM PDT | Flash Flood Warning | VEF | Clark | 109 min |
| Jul 15, 10:14 AM PDT | Flash Flood Watch | VEF | Clark, Lincoln, Nye | 11 hr |
| Jul 15, 10:30 AM PDT | Flash Flood Warning | VEF | Lincoln | 4 hr |
| Jul 15, 1:24 PM PDT | Flash Flood Warning | VEF | Nye | 4 hr |
| Jul 15, 1:58 PM PDT | Flash Flood Warning | VEF | Lincoln | 82 min |
| Jul 15, 2:16 PM PDT | Severe Thunderstorm Warning | VEF | Clark | 44 min |
| Jul 15, 2:41 PM PDT | Areal Flood Advisory | VEF | Clark | 3 hr |
| Jul 15, 3:01 PM PDT | Flash Flood Warning | VEF | Lincoln | 6 hr |
| Jul 15, 4:40 PM PDT | Flash Flood Warning | VEF | Clark | 65 min |
| Jul 15, 4:58 PM PDT | Flash Flood Warning | VEF | Clark | 92 min |
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.