Alert archive / Nevada / Flash Flood Warnings in 2012
Flash Flood Warning 125, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Aug 18, 2012, 4:24 PM PDT for Nye County, Nevada. It was in force for 96 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 18, 2012, 4:24 PM PDT (23:24 UTC)
- Expired
- Aug 18, 2012, 6:00 PM PDT
- In force
- 96 min
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
- Flood severity
- None
County Nye County, NV
The radar
The Las Vegas radar (KESX), 160 km from the middle of the area, began a volume at 23:26 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, 11.4 hours before the alert went out and 65 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
- 33 J/kg
- Mixed-layer CIN
- -303 J/kg
- Mixed-layer LCL
- 2227 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- -22 m²/s²
- 0-3 km storm-relative helicity
- 32 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
574 WGUS55 KVEF 182324 FFWVEF NVC023-190100- /O.NEW.KVEF.FF.W.0125.120818T2324Z-120819T0100Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 424 PM PDT SAT AUG 18 2012 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A * FLASH FLOOD WARNING FOR... SOUTH CENTRAL NYE COUNTY IN SOUTH CENTRAL NEVADA... * UNTIL 600 PM PDT. * AT 422 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN FROM A THUNDERSTORM OVER THE SOUTHERN PART OF THE NEVADA NATIONAL SECURITY SITE...OR 10 MILES NORTH OF MERCURY. THE STORM WAS MOVING EAST AT 5 MPH. * LOCATIONS IMPACTED INCLUDE... MERCURY AND THE NEVADA NATIONAL SECURITY SITE. 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 3697 11591 3666 11590 3666 11613 3688 11617 $$ MORGAN
2 follow-up statements
348 WGUS75 KVEF 190008 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 508 PM PDT SAT AUG 18 2012 NVC023-190100- /O.CON.KVEF.FF.W.0125.000000T0000Z-120819T0100Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ NYE NV- 508 PM PDT SAT AUG 18 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 600 PM PDT FOR SOUTH CENTRAL NYE COUNTY... AT 505 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A THUNDERSTORM PRODUCING VERY HEAVY RAIN OVER MERCURY AND THE SOUTHERN END OF THE NEVADA NATIONAL SECURITY SITE. THIS STORM WAS MOVING SLOWLY...AND WILL PRODUCE ADDITIONAL HEAVY RAIN OVER AREAS WHICH ALREADY RECEIVED HEAVY RAIN BETWEEN 4 AND 5 PM PDT. LOCATIONS IMPACTED INCLUDE... MERCURY AND THE SOUTHERN END OF THE NEVADA NATIONAL SECURITY SITE. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON AREA ROADWAYS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. TO ESCAPE RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN! REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER HASHTAG... NWSVEGAS. && LAT...LON 3697 11591 3666 11590 3666 11613 3688 11617 $$ MORGAN
244 WGUS75 KVEF 190051 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 551 PM PDT SAT AUG 18 2012 NVC023-190101- /O.EXP.KVEF.FF.W.0125.000000T0000Z-120819T0100Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ NYE NV- 551 PM PDT SAT AUG 18 2012 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 600 PM PDT FOR SOUTH CENTRAL NYE COUNTY... AT 550 PM PDT...RADAR SHOWED HEAVY RAIN MOVING WEST ACROSS THE SOUTHERN END OF THE NEVADA NATIONAL SECURITY SITE...AWAY FROM AREAS WHICH RECEIVED THE HEAVIEST RAIN. NO REPORTS OF FLOODING HAD BEEN RECEIVED...SO THE FLASH FLOOD WARNING WILL BE ALLOWED TO EXPIRE. LAT...LON 3697 11591 3666 11590 3666 11613 3688 11617 $$ MORGAN
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 17, 8:32 PM PDT | Flash Flood Warning | VEF | Clark, Lincoln | 4 hr |
| Aug 17, 11:39 PM PDT | Flash Flood Warning | VEF | Clark | 2 hr |
| Aug 18, 12:01 PM PDT | Areal Flood Advisory | VEF | Clark | 119 min |
| Aug 18, 2:00 PM PDT | Areal Flood Advisory | VEF | Nye | 2 hr |
| Aug 18, 3:26 PM PDT | Areal Flood Advisory | VEF | Clark, Nye | 54 min |
| Aug 18, 3:39 PM PDT | Flash Flood Warning | VEF | Clark | 63 min |
| Aug 18, 4:18 PM PDT | Flash Flood Warning | VEF | Nye | 53 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.