Alert archive / Nevada / Flash Flood Warnings in 2012
Flash Flood Warning 140, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Aug 21, 2012, 1:42 PM PDT for Lincoln County, Nevada. It was in force for 113 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
- Aug 21, 2012, 1:42 PM PDT (20:42 UTC)
- Expired
- Aug 21, 2012, 3:35 PM PDT
- In force
- 113 min
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
- Flood severity
- None
County Lincoln County, NV
The radar
The Cedar City radar (KICX), 151 km from the middle of the area, began a volume at 20:45 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, 8.7 hours before the alert went out and 151 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
- 108 J/kg
- Mixed-layer CIN
- -245 J/kg
- Mixed-layer LCL
- 2596 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 20 m²/s²
- 0-3 km storm-relative helicity
- -46 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
132 WGUS55 KVEF 212042 FFWVEF NVC017-212245- /O.NEW.KVEF.FF.W.0140.120821T2042Z-120821T2245Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 142 PM PDT TUE AUG 21 2012 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A * FLASH FLOOD WARNING FOR... CENTRAL LINCOLN COUNTY IN SOUTH CENTRAL NEVADA... * UNTIL 345 PM PDT. * AT 134 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN FROM A THUNDERSTORM OVER CENTRAL LINCOLN COUNTY... OR 8 MILES SOUTHWEST OF CALIENTE. THE STORM PRODUCING VERY HEAVY RAIN WAS NEARLY STATIONARY. * LOCATIONS IMPACTED INCLUDE... HIGHWAY 317 SOUTH OF CALIENTE. 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 3756 11454 3739 11452 3737 11459 3755 11466 $$ ASG
2 follow-up statements
207 WGUS75 KVEF 212147 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 247 PM PDT TUE AUG 21 2012 NVC017-212245- /O.CON.KVEF.FF.W.0140.000000T0000Z-120821T2245Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ LINCOLN NV- 247 PM PDT TUE AUG 21 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 345 PM PDT FOR CENTRAL LINCOLN COUNTY... AT 239 PM PDT...HEAVY RAIN FROM AN EARLIER THUNDERSTORM HAS ENDED OVER HIGHWAY 317. HOWEVER...SIGNIFICANT RUNOFF AND FLOODING IS LIKELY TO CONTINUE THROUGH 330 PM. THE AREA AFFECTED IS ABOUT 11 MILES SOUTH OF CALIENTE ON HIGHWAY 317. LOCATIONS IMPACTED INCLUDE... HIGHWAY 317 SOUTH OF CALIENTE. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON AREA ROADWAYS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. TO ESCAPE RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN! REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER HASHTAG... NWSVEGAS. && LAT...LON 3756 11454 3739 11452 3737 11459 3755 11466 $$ ASG
437 WGUS75 KVEF 212235 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 335 PM PDT TUE AUG 21 2012 NVC017-212245- /O.CAN.KVEF.FF.W.0140.000000T0000Z-120821T2245Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ LINCOLN NV- 335 PM PDT TUE AUG 21 2012 ...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR CENTRAL LINCOLN COUNTY... HEAVY RAIN AND RUNOFF THAT PROMPTED THE WARNING HAVE ENDED OVER THE WARNED AREA. THEREFORE THE FLASH FLOOD WARNING HAS BEEN CANCELLED. LAT...LON 3756 11454 3739 11452 3737 11459 3755 11466 $$ ASG
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 21, 11:39 AM PDT | Flash Flood Watch | VEF | Clark, Esmeralda, Lincoln, Nye | 36 hr |
| Aug 21, 1:09 PM PDT | Severe Thunderstorm Warning | VEF | Clark, Lincoln | 36 min |
| Aug 21, 1:19 PM PDT | Flash Flood Warning | VEF | Clark | 116 min |
| Aug 21, 2:47 PM PDT | Special Weather Statement | VEF | 43 min | |
| Aug 21, 4:09 PM PDT | Severe Thunderstorm Warning | VEF | Clark | 51 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.