Alert archive / California / Flash Flood Warnings in 2011
Flash Flood Warning 72, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Aug 13, 2011, 3:11 PM PDT for San Bernardino County, California. 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
- Aug 13, 2011, 3:11 PM PDT (22:11 UTC)
- Expired
- Aug 13, 2011, 5:15 PM PDT
- In force
- 2 hr
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
- Flood severity
- None
County San Bernardino County, CA
The nearest sounding before it
Las Vegas, NV (KVEF), launched 12:00Z, 10.2 hours before the alert went out and 203 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 3607 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 1 m²/s²
- 0-3 km storm-relative helicity
- 48 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
086
WGUS55 KVEF 132211
FFWVEF
CAC071-140015-
/O.NEW.KVEF.FF.W.0072.110813T2211Z-110814T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
311 PM PDT SAT AUG 13 2011
THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A
* FLASH FLOOD WARNING FOR...
CENTRAL SAN BERNARDINO COUNTY IN SOUTHERN CALIFORNIA...
INCLUDING DAGGETT
* UNTIL 515 PM PDT.
* AT 306 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
VERY HEAVY RAIN FROM THUNDERSTORMS NEAR AND NORTHEAST OF DAGGETT.
THE STORMS PRODUCING VERY HEAVY RAIN WERE MOVING SLOWLY NORTH AT
AROUND 10 MPH. NEW STORMS CONTINUE TO FORM OVER THE SAME AREA AND
ADDITIONAL HEAVY RAINFALL IS POSSIBLE. RADAR ESTIMATES AROUND ONE
AND ONE HALF INCHES OF RAIN HAS FALLEN SINCE 2 PM NEAR DAGGETT.
* LOCATIONS IMPACTED INCLUDE...DAGGETT.
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 3491 11687 3494 11680 3491 11673 3488 11681
3484 11686 3483 11690
$$
JGG2 follow-up statements
387
WGUS75 KVEF 132259
FFSVEF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
359 PM PDT SAT AUG 13 2011
CAC071-140015-
/O.CON.KVEF.FF.W.0072.000000T0000Z-110814T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN BERNARDINO CA-
359 PM PDT SAT AUG 13 2011
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 515 PM PDT FOR
CENTRAL SAN BERNARDINO COUNTY...
AT 355 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A THUNDERSTORM PRODUCING VERY HEAVY RAIN. THIS STORM WAS
LOCATED 6 MILES NORTHEAST OF DAGGETT...MOVING NORTHEAST AT 10 MPH.
RAIN RATES WILL BEGIN TO DECREASE IN THE WARNED AREA AFTER 415 PM.
HOWEVER...FLASH FLOODING FROM RUNOFF WILL CONTINUE THROUGH 515 PM
PDT.
LOCATIONS IMPACTED INCLUDE...DAGGETT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FLASH FLOODING IS EXPECTED ON AREA ROADWAYS...AROUND UNDERPASSES...
AND IN NORMALLY DRY WASHES AND LOW LYING AREAS. FLASH FLOODING IS
NATURES NUMBER ONE KILLER. NEVER TRY TO CROSS A FLOODED ROADWAY OR
WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN!
REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL
WEATHER SERVICE FACEBOOK PAGE OR TWITTER #NWSVEGAS.
&&
LAT...LON 3491 11687 3494 11680 3491 11673 3488 11681
3484 11686 3483 11690
$$
PIERCE219
WGUS75 KVEF 140015
FFSVEF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
515 PM PDT SAT AUG 13 2011
CAC071-140022-
/O.EXP.KVEF.FF.W.0072.000000T0000Z-110814T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN BERNARDINO CA-
515 PM PDT SAT AUG 13 2011
...THE FLASH FLOOD WARNING WILL EXPIRE AT 515 PM PDT FOR CENTRAL SAN
BERNARDINO COUNTY...
HEAVY RAINFALL ENDED BEFORE 4 PM OVER THE AREA FROM DAGGETT TO JUST
EAST OF YERMO AND RUNOFF HAS LIKELY SUBISDED. THE THREAT OF
SIGNIFICANT FLASH FLOODING IN THE AREA HAS ENDED BUT WATER COULD
STILL BE OVER SECONDARY ROADS THROUGH EARLY EVENING. DO NOT GO
THROUGH WATER OF UNKNOWN DEPTH.
LAT...LON 3491 11687 3494 11680 3491 11673 3488 11681
3484 11686 3483 11690
$$
JAThe office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 13, 1:50 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 25 min |
| Aug 13, 2:15 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 30 min |
| Aug 13, 2:28 PM PDT | Areal Flood Advisory | VEF | San Bernardino | 45 min |
| Aug 13, 4:22 PM PDT | Areal Flood Advisory | VEF | San Bernardino | 113 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.