Alert archive / California / Flash Flood Warnings in 2011
Flash Flood Warning 66, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Jul 30, 2011, 4:35 PM PDT for San Bernardino County, California. It was in force for 115 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
- Jul 30, 2011, 4:35 PM PDT (23:35 UTC)
- Expired
- Jul 30, 2011, 6:30 PM PDT
- In force
- 115 min
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
- Flood severity
- None
County San Bernardino County, CA
The radar
The Santa Ana Mts radar (KSOX), 180 km from the middle of the area, began a volume at 23:38 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
San Diego, CA (KNKX), launched 12:00Z, 11.6 hours before the alert went out and 202 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
- 657 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 0 m²/s²
- 0-3 km storm-relative helicity
- 44 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
822
WGUS55 KVEF 302335
FFWVEF
CAC071-310130-
/O.NEW.KVEF.FF.W.0066.110730T2335Z-110731T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
435 PM PDT SAT JUL 30 2011
THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTH CENTRAL SAN BERNARDINO COUNTY IN SOUTHERN CALIFORNIA...
* UNTIL 630 PM PDT.
* AT 431 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
VERY HEAVY RAIN FROM A THUNDERSTORM 12 MILES EAST OF WEST WIND
AERO...OR 21 MILES EAST OF TWENTYNINE PALMS. THE STORM PRODUCING
VERY HEAVY RAIN WAS NEARLY STATIONARY.
* LOCATIONS IMPACTED INCLUDE...WEST WIND AERO...AND HIGHWAY 62 FROM
MILE MARKER 37 TO 68.
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 3423 11598 3422 11554 3412 11551 3407 11556
3409 11560 3403 11561 3403 11599
$$
JGG3 follow-up statements
227
WGUS75 KVEF 310015
FFSVEF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
515 PM PDT SAT JUL 30 2011
CAC071-310130-
/O.CON.KVEF.FF.W.0066.000000T0000Z-110731T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN BERNARDINO CA-
515 PM PDT SAT JUL 30 2011
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 630 PM PDT FOR SOUTH
CENTRAL SAN BERNARDINO COUNTY...
AT 515 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE AN AREA OF THUNDERSTORMS PRODUCING VERY HEAVY RAIN. THESE
STORMS WERE LOCATED 9 MILES EAST OF TWENTYNINE PALMS. THE STORMS ARE
MOVING SLOWLY NORTHWEST AT AROUND 15 MPH BUT NEW STORM DEVELOPMENT
TO THE SOUTH WILL CONTINUE TO LEAD TO HEAVY RAINFALL IN THE AREA.
THE THREAT FOR FLASH FLOODING IS ALONG HIGHWAY 62 FROM MILE MARKER
42 TO 68.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON
AREA ROADWAYS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. TO ESCAPE
RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED
ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN!
REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL
WEATHER SERVICE FACEBOOK PAGE OR TWITTER #NWSVEGAS.
&&
LAT...LON 3404 11590 3423 11591 3422 11554 3412 11551
3407 11556 3409 11560 3403 11561
$$
JGG859
WGUS75 KVEF 310102
FFSVEF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
602 PM PDT SAT JUL 30 2011
CAC071-310130-
/O.CON.KVEF.FF.W.0066.000000T0000Z-110731T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN BERNARDINO CA-
602 PM PDT SAT JUL 30 2011
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 630 PM PDT FOR SOUTH
CENTRAL SAN BERNARDINO COUNTY...
AT 557 PM PDT...RADAR INDICATED HEAVY RAIN EAST OF TWENTYNINE PALMS
ACROSS HIGHWAY 62 HAS GENERALLY ENDED...WITH ONLY LIGHT RAIN
CONTINUING. HOWEVER...THE THREAT FOR RUNOFF AND FLASH FLOODING WILL
PERSIST THROUGH AROUND 630 PM.
LOCATIONS IMPACTED INCLUDE HIGHWAY 62 BETWEEN MILE MARKER 42 AND 68.
LAT...LON 3404 11590 3423 11591 3422 11554 3412 11551
3407 11556 3409 11560 3403 11561
$$
JGG939
WGUS75 KVEF 310121
FFSVEF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
621 PM PDT SAT JUL 30 2011
CAC071-310130-
/O.EXP.KVEF.FF.W.0066.000000T0000Z-110731T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN BERNARDINO CA-
621 PM PDT SAT JUL 30 2011
...THE FLASH FLOOD WARNING WILL EXPIRE AT 630 PM PDT FOR SOUTH
CENTRAL SAN BERNARDINO COUNTY...
HEAVY RAINFALL IN THE AREA HAS ENDED. WATER RUNNING THROUGH WASHES
AND IN LOW LYING AREAS WILL REMAIN POSSIBLE THROUGH THIS EVENING IN
THE AREA.
A FLOOD ADVISORY REMAINS IN EFFECT UNTIL 730 PM FOR THE TWENTYNINE
PALMS AREA.
LAT...LON 3404 11590 3423 11591 3422 11554 3412 11551
3407 11556 3409 11560 3403 11561
$$
JGGThe office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 29, 6:07 PM PDT | Flash Flood Warning | VEF | Inyo | 53 min |
| Jul 29, 6:55 PM PDT | Areal Flood Advisory | VEF | San Bernardino | 80 min |
| Jul 29, 7:02 PM PDT | Flash Flood Warning | VEF | Inyo | 118 min |
| Jul 29, 8:21 PM PDT | Areal Flood Advisory | VEF | San Bernardino | 84 min |
| Jul 29, 8:53 PM PDT | Flash Flood Warning | VEF | Inyo | 82 min |
| Jul 30, 12:57 PM PDT | Flash Flood Warning | VEF | Inyo | 2 hr |
| Jul 30, 1:52 PM PDT | Areal Flood Advisory | VEF | San Bernardino | 32 min |
| Jul 30, 2:07 PM PDT | Flash Flood Warning | VEF | Inyo | 3 hr |
| Jul 30, 2:17 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 43 min |
| Jul 30, 2:20 PM PDT | Flash Flood Warning | VEF | San Bernardino | 115 min |
| Jul 30, 4:07 PM PDT | Areal Flood Advisory | VEF | Inyo | 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; radar from the NEXRAD Level II archive.