Alert archive / Nevada / Flash Flood Warnings in 2011
Flash Flood Warning 81, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Sep 11, 2011, 3:27 PM PDT for Clark County, Lincoln County, Nye 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
- Sep 11, 2011, 3:27 PM PDT (22:27 UTC)
- Expired
- Sep 11, 2011, 5:30 PM PDT
- In force
- 2 hr
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
- Flood severity
- None
Counties Clark County, NV, Lincoln County, NV, Nye County, NV
The radar
The Las Vegas radar (KESX), 157 km from the middle of the area, began a volume at 22:30 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, 10.5 hours before the alert went out and 62 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
- 10 J/kg
- Mixed-layer CIN
- -244 J/kg
- Mixed-layer LCL
- 1944 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 48 m²/s²
- 0-3 km storm-relative helicity
- 164 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted, in the capitals the NWS used until 2016.
740 WGUS55 KVEF 112227 FFWVEF NVC003-017-023-120030- /O.NEW.KVEF.FF.W.0081.110911T2227Z-110912T0030Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 327 PM PDT SUN SEP 11 2011 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A * FLASH FLOOD WARNING FOR... EXTREME SOUTHWESTERN LINCOLN COUNTY IN SOUTH CENTRAL NEVADA... SOUTH CENTRAL NYE COUNTY IN SOUTH CENTRAL NEVADA... NORTHWESTERN CLARK COUNTY IN SOUTHERN NEVADA... * UNTIL 530 PM PDT. * AT 325 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN FROM A THUNDERSTORM OVER EXTREME NORTHWESTERN CLARK COUNTY...OR 13 MILES NORTHEAST OF MERCURY. THE STORM PRODUCING VERY HEAVY RAIN WAS NEARLY STATIONARY. * LOCATIONS IMPACTED INCLUDE... MAINLY RURAL AREAS OF EXTREME NORTHWESTERN CLARK...EXTREME SOUTHWESTERN LINCOLN AND SOUTHERN NYE COUNTIES...INCLUDING 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 TWITTER #NWSVEGAS. && LAT...LON 3692 11600 3692 11577 3674 11577 3674 11600 $$ MORGAN
2 follow-up statements
240 WGUS75 KVEF 112328 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 428 PM PDT SUN SEP 11 2011 NVC003-017-023-120030- /O.CON.KVEF.FF.W.0081.000000T0000Z-110912T0030Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CLARK NV-NYE NV-LINCOLN NV- 428 PM PDT SUN SEP 11 2011 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 530 PM PDT FOR EXTREME SOUTHWESTERN LINCOLN...SOUTH CENTRAL NYE AND NORTHWESTERN CLARK COUNTIES... AT 423 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A THUNDERSTORM PRODUCING VERY HEAVY RAIN. THIS STORM WAS LOCATED OVER EXTREME NORTHWESTERN CLARK COUNTY...OR 13 MILES NORTHEAST OF MERCURY. THE THUNDERSTORM WITH EXCESSIVE RAIN WAS NEARLY STATIONARY. THE HEAVY RAIN FROM THIS THUNDERSTORM WILL DRAIN INTO A DRY LAKE BED ON THE SOUTHERN PART OF THE NEVADA NATIONAL SECURITY SITE...A FEW MILES NORTH OF MERCURY. ANYONE WORKING IN OR NEAR THIS DRY LAKE BED SHOULD MOVE TO HIGHER GROUND. LOCATIONS IMPACTED INCLUDE... MAINLY RURAL AREAS OF EXTREME EASTERN NYE COUNTY. LAT...LON 3692 11600 3692 11577 3674 11577 3674 11600 $$ MORGAN
993 WGUS75 KVEF 120030 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 530 PM PDT SUN SEP 11 2011 NVC003-017-120038- /O.CAN.KVEF.FF.W.0081.000000T0000Z-110912T0030Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CLARK NV-LINCOLN NV- 530 PM PDT SUN SEP 11 2011 ...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR EXTREME SOUTHWESTERN LINCOLN AND NORTHWESTERN CLARK COUNTIES... THE HEAVY RAIN HAS ENDED AND THE IMMEDIATE THREAT OF ADDITIONAL FLASH FLOODING HAS ENDED...BUT RUNOFF MAY CONTINUE TO CAUSE MINOR FLOODING AND RAPIDLY RUNNING WASHES THROUGH 800 PM. LAT...LON 3689 11600 3691 11590 3674 11590 3674 11600 $$ NVC023-120030- /O.CON.KVEF.FF.W.0081.000000T0000Z-110912T0030Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ NYE NV- 530 PM PDT SUN SEP 11 2011 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 530 PM PDT FOR SOUTH CENTRAL NYE COUNTY... AT 524 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A THUNDERSTORM PRODUCING VERY HEAVY RAIN. THIS STORM WAS LOCATED OVER SOUTH CENTRAL NYE COUNTY...OR 11 MILES NORTH OF MERCURY. THE THUNDERSTORM WITH EXCESSIVE RAIN WAS NEARLY STATIONARY. RADAR ESTIMATES OVER THE PAST 3 HOURS HAVE BEEN IN EXCESS OF THREE INCHES OVER A LARGE AREA AND ALL OF THE RUNOFF HAS BEEN INTO SOUTHERN NYE COUNTY. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON AREA ROADWAYS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. TO ESCAPE RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN! REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL WEATHER SERVICE FACEBOOK PAGE OR TWITTER #NWSVEGAS. && LAT...LON 3689 11600 3691 11590 3674 11590 3674 11600 $$ SC
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 11, 2:06 PM PDT | Severe Thunderstorm Warning | VEF | Clark | 24 min |
| Sep 11, 2:52 PM PDT | Severe Thunderstorm Warning | VEF | Clark | 23 min |
| Sep 11, 3:03 PM PDT | Severe Thunderstorm Warning | VEF | Clark | 27 min |
| Sep 11, 3:13 PM PDT | Severe Thunderstorm Warning | VEF | Clark | 47 min |
| Sep 11, 3:26 PM PDT | Severe Thunderstorm Warning | VEF | Clark, Lincoln, Nye | 24 min |
| Sep 11, 3:52 PM PDT | Severe Thunderstorm Warning | VEF | Clark | 38 min |
| Sep 11, 4:25 PM PDT | Severe Thunderstorm Warning | VEF | Clark, Lincoln | 35 min |
| Sep 11, 4:30 PM PDT | Severe Thunderstorm Warning | VEF | Lincoln | 35 min |
| Sep 11, 4:37 PM PDT | Areal Flood Advisory | VEF | Nye | 47 min |
| Sep 11, 4:54 PM PDT | Severe Thunderstorm Warning | VEF | Clark, Lincoln | 36 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.