Alert archive / California / Flash Flood Warnings in 2011
Flash Flood Warning 48, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Jul 9, 2011, 4:25 PM PDT for San Bernardino County, California; Clark 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
- Jul 9, 2011, 4:25 PM PDT (23:25 UTC)
- Expired
- Jul 9, 2011, 6:30 PM PDT
- In force
- 2 hr
- 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), 37 km from the middle of the area, began a volume at 23:26 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, 11.4 hours before the alert went out and 100 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
- 210 J/kg
- Mixed-layer CIN
- -269 J/kg
- Mixed-layer LCL
- 2037 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- -7 m²/s²
- 0-3 km storm-relative helicity
- -4 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
WGUS55 KVEF 092325
FFWVEF
CAC071-NVC003-100130-
/O.NEW.KVEF.FF.W.0048.110709T2325Z-110710T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
425 PM PDT SAT JUL 9 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 630 PM PDT.
* AT 420 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
VERY HEAVY RAIN FROM A CLUSTER OF THUNDERSTORMS NEAR NIPTON ROAD
FROM NEAR INTERSTATE 15 IN CALIFORNIA TO SEARCHLIGHT NEVADA. THIS
ACTIVITY WAS PRODUCING RAINFALL TOTALS ESTIMATED BY RADAR IN
EXCESS OF AN INCH...WITH LOCALLY HIGHER AMOUNTS. THIS ACTIVITY WAS
MOVING NORTHEAST AT 5 TO 10 MPH.
* LOCATIONS IMPACTED INCLUDE...THE COMMUNITY OF NIPTON AS WELL AS
NIPTON ROAD AND IVANPAH.
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.
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 3561 11540 3567 11496 3544 11492 3533 11526
3543 11546
$$
STACHELSKI2 follow-up statements
694
WGUS75 KVEF 100034
FFSVEF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
534 PM PDT SAT JUL 9 2011
CAC071-NVC003-100130-
/O.CON.KVEF.FF.W.0048.000000T0000Z-110710T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN BERNARDINO CA-CLARK NV-
534 PM PDT SAT JUL 9 2011
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 630 PM PDT FOR SOUTH
CENTRAL CLARK AND NORTHEASTERN SAN BERNARDINO COUNTIES...
AT 530 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE SEVERAL THUNDERSTORMS CAPABLE OF PRODUCING HEAVY RAIN ALONG
NIPTON ROAD FROM NEAR INTERSTATE 15 TO SEARCHLIGHT. RAINFALL TOTALS
IN EXCESS OF AN INCH HAVE BEEN ESTIMATED BY NATIONAL WEATHER SERVICE
RADAR FROM THIS STORM. RUNOFF FROM THIS RAIN MAY WASH ONTO NIPTON
ROAD. IN ADDITION...RAPID RISES AND FLOWS IN AREA WASHES ARE
EXPECTED.
LOCATIONS IMPACTED INCLUDE...THE COMMUNITY OF NIPTON...NIPTON ROAD
AND IVANPAH ROAD.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON
AREA ROADWAYS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. TO ESCAPE
RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED
ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN!
REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL
WEATHER SERVICE FACEBOOK PAGE OR TWITTER #NWSVEGAS.
&&
LAT...LON 3561 11540 3567 11496 3544 11492 3533 11526
3543 11546
$$
STACHELSKI455
WGUS75 KVEF 100131
FFSVEF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
631 PM PDT SAT JUL 9 2011
CAC071-NVC003-100140-
/O.EXP.KVEF.FF.W.0048.000000T0000Z-110710T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN BERNARDINO CA-CLARK NV-
631 PM PDT SAT JUL 9 2011
...THE FLASH FLOOD WARNING HAS EXPIRED FOR SOUTH CENTRAL CLARK AND
NORTHEASTERN SAN BERNARDINO COUNTIES...
THUNDERSTORMS ALONG NIPTON ROAD HAVE WEAKENED AT THIS TIME. WITH THE
THREAT OF HEAVY RAINFALL OVER THE FLASH FLOOD WARNING HAS EXPIRED.
WATER WILL STILL LINGER IN WASHES AND LOW SPOTS FOR A FEW HOURS SO
BE CAREFUL IF YOU ARE IN THIS AREA.
LAT...LON 3561 11540 3567 11496 3544 11492 3533 11526
3543 11546
$$
STACHELSKIThe office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 8, 5:38 PM PDT | Areal Flood Advisory | VEF | Inyo | 112 min |
| Jul 8, 8:07 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 38 min |
| Jul 8, 8:18 PM PDT | Areal Flood Advisory | VEF | San Bernardino | 4 hr |
| Jul 9, 1:56 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 34 min |
| Jul 9, 4:27 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 22 min |
| Jul 8, 6:42 PM PDT | Severe Thunderstorm Warning | VEF | Lincoln | 48 min |
| Jul 8, 7:49 PM PDT | Areal Flood Advisory | VEF | Clark, Lincoln | 12 hr |
| Jul 9, 3:24 PM PDT | Areal Flood Advisory | VEF | Clark | 111 min |
Nearby
Flash Flood Warnings in California, 2011Flash 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.