Alert archive / Nevada / Flash Flood Warnings in 2011
Flash Flood Warning 85, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Sep 13, 2011, 6:31 AM PDT for Clark County, Nevada; San Bernardino County, California. It was in force for 86 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
- Sep 13, 2011, 6:31 AM PDT (13:31 UTC)
- Expired
- Sep 13, 2011, 7:57 AM PDT
- In force
- 86 min
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
- Flood severity
- None
Counties San Bernardino County, CA, Clark County, NV
The radar
The Las Vegas radar (KESX), 32 km from the middle of the area, began a volume at 13:32 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, 1.5 hours before the alert went out and 104 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.
615 WGUS55 KVEF 131331 FFWVEF CAC071-NVC003-131530- /O.NEW.KVEF.FF.W.0085.110913T1331Z-110913T1530Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 631 AM PDT TUE SEP 13 2011 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A * FLASH FLOOD WARNING FOR... NORTHEASTERN SAN BERNARDINO COUNTY IN SOUTHERN CALIFORNIA... SOUTH CENTRAL CLARK COUNTY IN SOUTHERN NEVADA... * UNTIL 830 AM PDT. * AT 627 AM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN FROM A THUNDERSTORM NEAR NIPTON ROAD MILE MARKER 3...OR 11 MILES WEST OF SEARCHLIGHT. THE STORM PRODUCING VERY HEAVY RAIN WAS MOVING NORTHEAST AT 15 MPH. * LOCATIONS IMPACTED INCLUDE... NIPTON ROAD BETWEEN SEARCHLIGHT AND THE CALIFORNIA STATE LINE. 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 3553 11528 3554 11496 3543 11493 3545 11526 $$ MORGAN
2 follow-up statements
616 WGUS75 KVEF 131418 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 718 AM PDT TUE SEP 13 2011 CAC071-NVC003-131530- /O.CON.KVEF.FF.W.0085.000000T0000Z-110913T1530Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN BERNARDINO CA-CLARK NV- 718 AM PDT TUE SEP 13 2011 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 830 AM PDT FOR SOUTH CENTRAL CLARK AND NORTHEASTERN SAN BERNARDINO COUNTIES... AT 716 AM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THUNDERSTORMS WITH HEAVY RAIN WERE MOVING AWAY FROM NIPTON ROAD. HOWEVER...RUNOFF MAY STILL BE OCCURRING...SO THE FLASH FLOOD WARNING WILL REMAIN IN EFFECT. LOCATIONS IMPACTED INCLUDE... NIPTON ROAD BETWEEN SEARCHLIGHT AND THE CALIFORNIA STATE LINE. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON AREA ROADWAYS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. TO ESCAPE RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN! REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL WEATHER SERVICE FACEBOOK PAGE OR TWITTER #NWSVEGAS. && LAT...LON 3553 11528 3554 11496 3543 11493 3545 11526 $$ MORGAN
260 WGUS75 KVEF 131457 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 757 AM PDT TUE SEP 13 2011 CAC071-NVC003-131507- /O.CAN.KVEF.FF.W.0085.000000T0000Z-110913T1530Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN BERNARDINO CA-CLARK NV- 757 AM PDT TUE SEP 13 2011 ...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR SOUTH CENTRAL CLARK AND NORTHEASTERN SAN BERNARDINO COUNTIES... AT 755 AM PDT...RADAR INDICATED THAT HEAVY RAIN HAD ENDED OVER THE NIPTON ROAD AREA. NO REPORTS OF FLOODING HAVE BEEN RECEIVED...SO THE FLASH FLOOD WARNING HAS BEEN CANCELLED. LAT...LON 3553 11528 3554 11496 3543 11493 3545 11526 $$ 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, 7:42 AM PDT | Flash Flood Warning | VEF | Clark | 2 hr |
| Sep 13, 8:01 AM PDT | Flash Flood Warning | VEF | Clark | 119 min |
| Sep 13, 8:23 AM PDT | Flash Flood Warning | VEF | Clark | 112 min |
| Sep 13, 8:01 AM PDT | Flash Flood Warning | VEF | San Bernardino | 119 min |
| Sep 13, 9:09 AM PDT | Flash Flood Warning | VEF | San Bernardino | 111 min |
| Sep 13, 9:56 AM PDT | Flash Flood Warning | VEF | San Bernardino | 83 min |
| Sep 13, 10:22 AM PDT | Flash Flood Warning | VEF | San Bernardino | 113 min |
| Sep 13, 11:09 AM PDT | Flash Flood Warning | VEF | San Bernardino | 27 min |
Nearby
Flash Flood Warnings in Nevada, 2011Flash Flood Warnings in California, 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.