Alert archive / Nevada / Flash Flood Warnings in 2011
Flash Flood Warning 89, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Sep 13, 2011, 8:23 AM PDT for Clark County, Nevada; Mohave County, Arizona. It was in force for 112 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, 8:23 AM PDT (15:23 UTC)
- Expired
- Sep 13, 2011, 10:15 AM PDT
- In force
- 112 min
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
- Flood severity
- None
Counties Mohave County, AZ, Clark County, NV
The radar
The Las Vegas radar (KESX), 45 km from the middle of the area, began a volume at 15:23 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, 3.4 hours before the alert went out and 72 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.
767 WGUS55 KVEF 131523 FFWVEF AZC015-NVC003-131715- /O.NEW.KVEF.FF.W.0089.110913T1523Z-110913T1715Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 823 AM PDT TUE SEP 13 2011 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A * FLASH FLOOD WARNING FOR... EXTREME WEST CENTRAL MOHAVE COUNTY IN NORTHWEST ARIZONA... CENTRAL CLARK COUNTY IN SOUTHERN NEVADA... * UNTIL 1015 AM PDT/1015 AM MST/. * AT 818 AM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN FROM THUNDERSTORMS DEVELOPING OVER BOULDER CITY...LAS VEGAS BAY...AND THE SURROUNDING AREAS. THESE STORMS WILL LIKELY PRODUCE FLASH FLOODING IN BOULDER CITY...ON NORTHSHORE ROAD...AND IN NEARBY AREAS. * LOCATIONS IMPACTED INCLUDE... LAS VEGAS BAY...CALLVILLE BAY...CALLVILLE BAY CAMPGROUND AND LAS VEGAS BAY CAMPGROUND. 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 3625 11491 3616 11462 3591 11468 3592 11492 $$ MORGAN
4 follow-up statements
742 WGUS75 KVEF 131558 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 858 AM PDT TUE SEP 13 2011 AZC015-NVC003-131715- /O.CON.KVEF.FF.W.0089.000000T0000Z-110913T1715Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MOHAVE AZ-CLARK NV- 858 AM PDT TUE SEP 13 2011 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1015 AM PDT/1015 AM MST/ FOR CENTRAL CLARK AND EXTREME WEST CENTRAL MOHAVE COUNTIES... AT 854 AM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE THUNDERSTORMS PRODUCING HEAVY RAIN IN THE BOULDER CITY AND BOULDER BEACH AREAS. A RAIN GAGE NEAR RAILROAD PASS HAD REPORTED OVER ONE INCH OF RAIN IN JUST UNDER ONE HOUR...AND ADDITIONAL HEAVY RAIN IS LIKELY. LOCATIONS IMPACTED INCLUDE... LAS VEGAS BAY...CALLVILLE BAY...CALLVILLE BAY CAMPGROUND AND LAS VEGAS BAY CAMPGROUND. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON AREA ROADWAYS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. TO ESCAPE RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN! REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL WEATHER SERVICE FACEBOOK PAGE OR TWITTER #NWSVEGAS. && LAT...LON 3625 11491 3616 11462 3591 11468 3592 11492 $$ MORGAN
665 WGUS75 KVEF 131617 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 917 AM PDT TUE SEP 13 2011 AZC015-NVC003-131715- /O.CON.KVEF.FF.W.0089.000000T0000Z-110913T1715Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MOHAVE AZ-CLARK NV- 917 AM PDT TUE SEP 13 2011 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1015 AM PDT/1015 AM MST/ FOR CENTRAL CLARK AND EXTREME WEST CENTRAL MOHAVE COUNTIES... AT 912 AM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE HEAVY RAIN OVER THE BOULDER CITY AND BOULDER BEACH AREAS. ADDITIONAL HEAVY RAIN IS LIKELY...WHICH COULD LEAD TO FLASH FLOODING. LOCATIONS IMPACTED INCLUDE... LAS VEGAS BAY...CALLVILLE BAY...CALLVILLE BAY CAMPGROUND AND LAS VEGAS BAY CAMPGROUND. 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 3625 11491 3616 11462 3591 11468 3592 11492 $$ MORGAN
575 WGUS75 KVEF 131646 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 946 AM PDT TUE SEP 13 2011 AZC015-NVC003-131715- /O.CON.KVEF.FF.W.0089.000000T0000Z-110913T1715Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MOHAVE AZ-CLARK NV- 946 AM PDT TUE SEP 13 2011 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1015 AM PDT/1015 AM MST/ FOR CENTRAL CLARK AND EXTREME WEST CENTRAL MOHAVE COUNTIES... AT 939 AM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE MODERATE TO HEAVY RAIN OVER BOULDER CITY AND BOULDER BEACH. THE AREA OF RAIN WAS NEARLY STATIONARY...AND HAS PERSISTED OVER THE SAME AREA SINCE 830 AM. LOCATIONS IMPACTED INCLUDE... LAS VEGAS BAY...CALLVILLE BAY...CALLVILLE BAY CAMPGROUND AND LAS VEGAS BAY CAMPGROUND. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON AREA ROADWAYS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. TO ESCAPE RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN! REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL WEATHER SERVICE FACEBOOK PAGE OR TWITTER #NWSVEGAS. && LAT...LON 3625 11491 3616 11462 3591 11468 3592 11492 $$ MORGAN
159 WGUS75 KVEF 131706 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 1006 AM PDT TUE SEP 13 2011 AZC015-NVC003-131715- /O.EXP.KVEF.FF.W.0089.000000T0000Z-110913T1715Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MOHAVE AZ-CLARK NV- 1006 AM PDT TUE SEP 13 2011 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 1015 AM PDT/1015 AM MST/ FOR CENTRAL CLARK AND EXTREME WEST CENTRAL MOHAVE COUNTIES... AT 1005 AM PDT...RADAR INDICATED ONLY LIGHT RAIN LEFT IN THE BOULDER CITY AREA. ONLY MINOR STREET FLOODING WAS REPORTED...AND NO ADDITIONAL FLOODING IS EXPECTED...SO THE WARNING WILL BE ALLOWED TO EXPIRE. LAT...LON 3625 11491 3616 11462 3591 11468 3592 11492 $$ 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, 8:01 AM PDT | Flash Flood Warning | VEF | Clark | 119 min |
| Sep 13, 4:33 AM PDT | Areal Flood Advisory | VEF | Mohave | 41 min |
| Sep 13, 5:10 AM PDT | Flash Flood Warning | VEF | Mohave | 2 hr |
| Sep 13, 5:32 AM PDT | Areal Flood Advisory | VEF | Mohave | 118 min |
| Sep 13, 9:56 AM PDT | Flash Flood Warning | VEF | Mohave | 83 min |
| Sep 13, 11:09 AM PDT | Flash Flood Warning | VEF | Mohave | 27 min |
Nearby
Flash Flood Warnings in Nevada, 2011Flash Flood Warnings in Arizona, 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.