Alert archive / Nevada / Flash Flood Warnings in 2011
Flash Flood Warning 87, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Sep 13, 2011, 8:01 AM PDT for Clark County, Nevada. It was in force for 119 min. 4 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 13, 2011, 8:01 AM PDT (15:01 UTC)
- Expired
- Sep 13, 2011, 10:00 AM PDT
- In force
- 119 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), 44 km from the middle of the area, began a volume at 15:01 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 13, 8:04 AM PDT | FLASH FLOOD | 1 Se East Las Vegas, NV | WATER WAS REPORTED FLOWING ACROSS THE INTERSECTION OF BOULDER HIGHWAY AND RUSSEL ROAD AND SPILLING OVER INTO A NEARBY FLOOD CHANNEL. |
| Sep 13, 9:00 AM PDT | FLASH FLOOD | 3 Sse Henderson, NV | FLOODWATERS BUILT UP BEHIND A BACKYARD WALL AT A HOME IN HENDERSON NEAR HORIZON RIDGE AND MISSION AND STRAINED THE WALL TO THE POINT THAT IT BROKE. A FOUR FOOT WALL OF WATER AND MUD RUSHED INTO THE YARD OF A HOME...FLOODING MOST OF THE FIRST FLOOR AND INUNDATI |
| Sep 13, 9:00 AM PDT | FLASH FLOOD | 5 Se Henderson, NV | ROCKS...DEBRIS AND MUD WERE ON SOME ROADS NEAR US 95 AND WAGON WHEEL DRIVE. ROAD CREWS HAD TO USE A BULLDOZER TO REMOVE IT FROM THE ROADS. |
| Sep 13, 9:00 AM PDT | FLASH FLOOD | 5 Se Henderson, NV | ROCKS...DEBRIS AND MUD WERE ON SOME ROADS NEAR US 95 AND WAGON WHEEL DRIVE. ROAD CREWS HAD TO USE A BULLDOZER TO REMOVE TO REMOVE IT FROM THE ROADS. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Las Vegas, NV (KVEF), launched 12:00Z, 3.0 hours before the alert went out and 51 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
- 239 J/kg
- Mixed-layer CIN
- -98 J/kg
- Mixed-layer LCL
- 1707 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 75 m²/s²
- 0-3 km storm-relative helicity
- 136 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.3
The text
As transmitted, in the capitals the NWS used until 2016.
732 WGUS55 KVEF 131501 FFWVEF NVC003-131700- /O.NEW.KVEF.FF.W.0087.110913T1501Z-110913T1700Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 801 AM PDT TUE SEP 13 2011 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A * FLASH FLOOD WARNING FOR... CENTRAL CLARK COUNTY IN SOUTHERN NEVADA... * UNTIL 1000 AM PDT. * AT 756 AM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN FROM A THUNDERSTORM NEAR SILVERADO RANCH...OR 9 MILES WEST OF HENDERSON. STORMS PRODUCING VERY HEAVY RAIN WERE DEVELOPING OVER MUCH OF THE SOUTHERN LAS VEGAS VALLEY...AND WILL CAUSE FLASH FLOODING. * LOCATIONS IMPACTED INCLUDE... HENDERSON...GREEN VALLEY...MCCARRAN INTERNATIONAL AIRPORT...UNLV... SPRING VALLEY...EAST LAS VEGAS AND SAM BOYD STADIUM. 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 3612 11530 3610 11492 3592 11492 3594 11532 $$ MORGAN
4 follow-up statements
359 WGUS75 KVEF 131527 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 827 AM PDT TUE SEP 13 2011 NVC003-131700- /O.CON.KVEF.FF.W.0087.000000T0000Z-110913T1700Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CLARK NV- 827 AM PDT TUE SEP 13 2011 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1000 AM PDT FOR CENTRAL CLARK COUNTY... AT 823 AM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE THUNDERSTORMS PRODUCING VERY HEAVY RAIN OVER THE SOUTHERN LAS VEGAS VALLEY...ESPECIALLY IN THE HENDERSON AREA. AT 804 AM...FLOODING WAS REPORTED AT BOULDER HIGHWAY AND RUSSELL ROAD. VERY HEAVY RAIN WILL CONTINUE IN THE HENDERSON AREA...AND ADDITIONAL FLASH FLOODING IS LIKELY. LOCATIONS IMPACTED INCLUDE... HENDERSON...GREEN VALLEY...MCCARRAN INTERNATIONAL AIRPORT...UNLV... EAST LAS VEGAS...SAM BOYD STADIUM AND SPRING VALLEY. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED ON AREA ROADWAYS...AROUND UNDERPASSES... AND IN NORMALLY DRY WASHES AND LOW LYING AREAS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. NEVER TRY TO CROSS A FLOODED ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN! REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL WEATHER SERVICE FACEBOOK PAGE OR TWITTER #NWSVEGAS. && LAT...LON 3612 11530 3610 11492 3592 11492 3594 11532 $$ MORGAN
937 WGUS75 KVEF 131552 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 852 AM PDT TUE SEP 13 2011 NVC003-131700- /O.CON.KVEF.FF.W.0087.000000T0000Z-110913T1700Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CLARK NV- 852 AM PDT TUE SEP 13 2011 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1000 AM PDT FOR CENTRAL CLARK COUNTY... AT 845 AM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE THUNDERSTORMS PRODUCING VERY HEAVY RAIN OVER HENDERSON. FLOODING HAD ALREADY BEEN REPORTED AT BOULDER HIGHWAY AND RUSSELL ROAD...AND EXTREMELY HEAVY RAIN WAS FALLING AT THE INTERCHANGE OF HIGHWAYS 215 AND 515. FURTHER FLASH FLOODING IS LIKELY IN THIS AREA. LOCATIONS IMPACTED INCLUDE... HENDERSON...GREEN VALLEY...MCCARRAN INTERNATIONAL AIRPORT...UNLV... EAST LAS VEGAS AND SAM BOYD STADIUM. 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 3611 11521 3610 11492 3592 11492 3594 11513 $$ MORGAN
843 WGUS75 KVEF 131627 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 927 AM PDT TUE SEP 13 2011 NVC003-131700- /O.CON.KVEF.FF.W.0087.000000T0000Z-110913T1700Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CLARK NV- 927 AM PDT TUE SEP 13 2011 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1000 AM PDT FOR CENTRAL CLARK COUNTY... AT 921 AM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT RAIN WAS ENDING OVER THE HENDERSON AREA. HOWEVER...SIGNIFICANT FLOODING WAS OCCURRING IN THE AREA...AND WILL CONTINUE UNTIL 10 AM. LOCATIONS IMPACTED INCLUDE... HENDERSON...GREEN VALLEY...SAM BOYD STADIUM...EAST LAS VEGAS...UNLV AND MCCARRAN INTERNATIONAL AIRPORT. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED ON AREA ROADWAYS...AROUND UNDERPASSES... AND IN NORMALLY DRY WASHES AND LOW LYING AREAS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. NEVER TRY TO CROSS A FLOODED ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN! REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL WEATHER SERVICE FACEBOOK PAGE OR TWITTER #NWSVEGAS. && LAT...LON 3611 11521 3610 11492 3592 11492 3594 11513 $$ MORGAN
144 WGUS75 KVEF 131652 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 952 AM PDT TUE SEP 13 2011 NVC003-131702- /O.EXP.KVEF.FF.W.0087.000000T0000Z-110913T1700Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CLARK NV- 952 AM PDT TUE SEP 13 2011 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 1000 AM PDT FOR CENTRAL CLARK COUNTY... AT 950 AM PDT...RADAR INDICATED THAT RAIN HAD ENDED IN HENDERSON. NO SIGNIFICANT REPORTS OF FLOODING HAVE BEEN RECEIVED SINCE 915 AM...SO THE FLASH FLOOD WARNING WILL BE ALLOWED TO EXPIRE AT 10 AM. LAT...LON 3611 11521 3610 11492 3592 11492 3594 11513 $$ MORGAN
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 13, 3:31 AM PDT | Areal Flood Advisory | VEF | Clark | 119 min |
| Sep 13, 3:36 AM PDT | Flash Flood Watch | VEF | Clark | 15 hr |
| Sep 13, 5:46 AM PDT | Areal Flood Advisory | VEF | Clark | 119 min |
| Sep 13, 6:31 AM PDT | Flash Flood Warning | VEF | Clark | 86 min |
| Sep 13, 7:42 AM PDT | Flash Flood Warning | VEF | Clark | 2 hr |
| Sep 13, 8:23 AM PDT | Flash Flood Warning | VEF | Clark | 112 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.