Alert archive / California / Flash Flood Warnings in 2011
Flash Flood Warning 92, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Sep 13, 2011, 10:22 AM PDT for San Bernardino County, California. It was in force for 113 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, 10:22 AM PDT (17:22 UTC)
- Expired
- Sep 13, 2011, 12:15 PM PDT
- In force
- 113 min
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
- Flood severity
- None
County San Bernardino County, CA
The radar
The Las Vegas radar (KESX), 53 km from the middle of the area, began a volume at 17:23 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, 5.4 hours before the alert went out and 109 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.
712
WGUS55 KVEF 131722
FFWVEF
CAC071-131915-
/O.NEW.KVEF.FF.W.0092.110913T1722Z-110913T1915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
1022 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...
* UNTIL 1215 PM PDT.
* AT 1014 AM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
VERY HEAVY RAIN FROM A THUNDERSTORM 18 MILES SOUTH OF NIPTON AND
IVANPAH ROADS...OR NEAR CIMA. THE STORM PRODUCING VERY HEAVY RAIN
WAS NEARLY STATIONARY.
* LOCATIONS IMPACTED INCLUDE...EASTERN SAN BERNARDINO COUNTY SOUTH
OF INTERSTATE 15 AND NIPTON...ALONG IVANPAH ROAD NORTH OF CIMA.
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 3544 11549 3552 11541 3557 11539 3556 11534
3537 11511 3520 11522 3519 11535
$$
KENNEDY1 follow-up statement
133
WGUS75 KVEF 131909
FFSVEF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
1209 PM PDT TUE SEP 13 2011
CAC071-131919-
/O.EXP.KVEF.FF.W.0092.000000T0000Z-110913T1915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN BERNARDINO CA-
1209 PM PDT TUE SEP 13 2011
...THE FLASH FLOOD WARNING WILL EXPIRE AT 1215 PM PDT FOR
NORTHEASTERN SAN BERNARDINO COUNTY...
ALTHOUGH MODERATE RAIN IS EXPECTED TO CONTINUE TO FALL THROUGH THE
EARLY AFTERNOON ACROSS THE AREA...THE THREAT OF FLASH FLOODING HAS
DECREASED SIGNIFICANTLY AND THE WARNING WILL BE ALLOWED TO EXPIRE.
MOTORISTS ALONG MORNINGSTAR AND IVANPAH ROAD SHOULD CONTINUE TO TAKE
CARE THOUGH...ESPECIALLY WHERE IVANPAH ROAD MEETS WILLOW WASH.
LAT...LON 3544 11549 3552 11541 3557 11539 3556 11534
3537 11511 3520 11522 3519 11535
$$
KENNEDYThe office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 13, 3:36 AM PDT | Flash Flood Watch | VEF | San Bernardino | 15 hr |
| Sep 13, 5:46 AM PDT | Areal Flood Advisory | VEF | San Bernardino | 119 min |
| Sep 13, 6:31 AM PDT | Flash Flood Warning | VEF | San Bernardino | 86 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, 11:09 AM PDT | Flash Flood Warning | VEF | San Bernardino | 27 min |
Nearby
Flash 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.