Alert archive / Nevada / Flash Flood Warnings in 2011
Flash Flood Warning 94, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Sep 14, 2011, 1:52 PM PDT for Clark County, Nevada. It was in force for 92 min. 2 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Sep 14, 2011, 1:52 PM PDT (20:52 UTC)
- Expired
- Sep 14, 2011, 3:24 PM PDT
- In force
- 92 min
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
- Flood severity
- None
County Clark County, NV
The radar
The Las Vegas radar (KESX), 62 km from the middle of the area, began a volume at 20:54 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Sep 14, 2:00 PM PDT | HEAVY RAIN 1.22 | 3 W Spring Valley, NV | 1.22 INCHES OF RAIN BETWEEN 1330-1400 PM |
| Sep 14, 2:26 PM PDT | FLASH FLOOD | 3 Wsw Spring Valley, NV | SWIFT WATER RESUES AT THE JUNCTION OF FLAMINGO RD AND I-215. WATER UP TO CAR WINDOWS. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Flgstf/Belemont, AZ (KFGZ), launched 12:00Z, 8.9 hours before the alert went out and 334 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
- 224 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 729 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 45 m²/s²
- 0-3 km storm-relative helicity
- 64 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
808 WGUS55 KVEF 142052 FFWVEF NVC003-142245- /O.NEW.KVEF.FF.W.0094.110914T2052Z-110914T2245Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 152 PM PDT WED SEP 14 2011 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A * FLASH FLOOD WARNING FOR... CENTRAL CLARK COUNTY IN SOUTHERN NEVADA... INCLUDING PORTIONS OF THE WESTERN LAS VEGAS VALLEY * UNTIL 345 PM PDT. * AT 149 PM PDT...RAIN GAUGES NEAR 215 AND FLAMINGO INDICATED THAT HALF OF AN INCH OF RAIN HAS FALLEN SINCE 130 PM FROM VERY SLOW MOVING THUNDERSTORMS OVER THE AREA. ADDITIONAL HEAVY RAINFALL IS POSSIBLE. * LOCATIONS IMPACTED INCLUDE... SUMMERLIN SOUTH AND SUMMERLIN WEST...AND THE 215 CORRIDOR IN THE SOUTHWESTERN VALLEY. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED ON AREA ROADWAYS...AROUND UNDERPASSES... AND IN NORMALLY DRY WASHES AND LOW LYING AREAS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. 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 3620 11541 3615 11525 3605 11524 3606 11533 $$ JGG
3 follow-up statements
879 WGUS75 KVEF 142118 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 218 PM PDT WED SEP 14 2011 NVC003-142245- /O.CON.KVEF.FF.W.0094.000000T0000Z-110914T2245Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CLARK NV- 218 PM PDT WED SEP 14 2011 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 345 PM PDT FOR CENTRAL CLARK COUNTY... AT 215 PM PDT...RAIN GAUGES NEAR THE 215 BELTWAY AND FLAMINGO REPORTED NEARLY ONE AND ONE QUARTER OF AN INCH OF RAIN HAS FALLEN SINCE 130 PM. RADAR INDICATES THE HEAVIEST RAIN IS ENDING BUT MODERATE RAINFALL IS EXPECTED TO CONTINUE THROUGH 300 PM. LOCATIONS IMPACTED INCLUDE... SUMMERLIN SOUTH AND SUMMERLIN WEST...AND AREAS NEAR THE 215 BELTWAY IN THE SOUTHWESTERN VALLEY. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED ON AREA ROADWAYS...AROUND UNDERPASSES... AND IN NORMALLY DRY WASHES AND LOW LYING AREAS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. NEVER TRY TO CROSS A FLOODED ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN! REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL WEATHER SERVICE FACEBOOK PAGE OR TWITTER #NWSVEGAS. && LAT...LON 3620 11541 3615 11525 3605 11524 3606 11533 $$ JGG
475 WGUS75 KVEF 142131 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 231 PM PDT WED SEP 14 2011 NVC003-142245- /O.CON.KVEF.FF.W.0094.000000T0000Z-110914T2245Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CLARK NV- 231 PM PDT WED SEP 14 2011 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 345 PM PDT FOR CENTRAL CLARK COUNTY... AT 225 PM PDT...RESCUE CREWS ARE PERFORMING SWIFT WATER RESCUES NEAR 215 AND FLAMINGO WITH WATER UP TO THE WINDOWS OF CARS. MODERATE RAINFALL IS STILL OCCURRING AND THIS MAY AGGRAVATE EXISTING FLOODING. MOTORISTS ARE STRONGLY ADVISED TO AVOID THIS AREA. LOCATIONS IMPACTED INCLUDE... SUMMERLIN SOUTH AND SUMMERLIN WEST...AND AREAS NEAR THE 215 BELTWAY IN THE SOUTHWEST VALLEY. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED ON AREA ROADWAYS...AROUND UNDERPASSES... AND IN NORMALLY DRY WASHES AND LOW LYING AREAS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. 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 3620 11541 3615 11525 3605 11524 3606 11533 $$ JGG
816 WGUS75 KVEF 142224 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 324 PM PDT WED SEP 14 2011 NVC003-142234- /O.CAN.KVEF.FF.W.0094.000000T0000Z-110914T2245Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CLARK NV- 324 PM PDT WED SEP 14 2011 ...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR CENTRAL CLARK COUNTY... HEAVY RAINFALL HAS ENDED AND LAW ENFORCEMENT REPORTS THAT FLASH FLOODING HAS ENDED IN THE AREA. AREAS OF STANDING OR PONDED WATER WILL BE POSSIBLE ON AREA ROADWAYS IN THE SOUTHWESTERN LAS VEGAS VALLEY THROUGH THIS EVENING. LAT...LON 3620 11541 3615 11525 3605 11524 3606 11533 $$ JGG
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 14, 1:19 PM PDT | Flash Flood Watch | VEF | Clark, Lincoln, Nye | 7 hr |
| Sep 14, 1:27 PM PDT | Areal Flood Advisory | VEF | Clark | 111 min |
| Sep 14, 3:13 PM PDT | Areal Flood Advisory | VEF | Clark | 2 hr |
| Sep 14, 4:02 PM PDT | Areal Flood Advisory | VEF | Lincoln | 118 min |
| Sep 14, 4:35 PM PDT | Flash Flood Warning | VEF | Clark | 55 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.