Alert archive / California / Flash Flood Warnings in 2011
Flash Flood Warning 14, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Jul 5, 2011, 1:37 PM PDT for San Bernardino County, California. It was in force for 113 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jul 5, 2011, 1:37 PM PDT (20:37 UTC)
- Expired
- Jul 5, 2011, 3:30 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 Santa Ana Mts radar (KSOX), 149 km from the middle of the area, began a volume at 20:40 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 5, 2:08 PM PDT | FLASH FLOOD | 2 Sw Twentynine Palms, CA | SPOTTER REPORTS 6 TO 12 INCHES OF WATER ACROSS HIGHWAY 62 IN TWENTYNINE PALMS. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
San Diego, CA (KNKX), launched 12:00Z, 8.6 hours before the alert went out and 180 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
- 3 J/kg
- Mixed-layer CIN
- -617 J/kg
- Mixed-layer LCL
- 969 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 40 m²/s²
- 0-3 km storm-relative helicity
- 13 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
658
WGUS55 KVEF 052037
FFWVEF
CAC071-052230-
/O.NEW.KVEF.FF.W.0014.110705T2037Z-110705T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
137 PM PDT TUE JUL 5 2011
THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTH CENTRAL SAN BERNARDINO COUNTY IN SOUTHERN CALIFORNIA...
* UNTIL 330 PM PDT.
* AT 132 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
VERY HEAVY RAIN FROM A THUNDERSTORM NEAR TWENTYNINE PALMS. THE
STORM PRODUCING VERY HEAVY RAIN WAS MOVING SLOWLY NORTHWARD.
* LOCATIONS IMPACTED INCLUDE...TWENTYNINE PALMS AND JOSHUA TREE LAKE
CAMPGROUND...AS WELL AS HIGHWAY 62 BETWEEN MILE MARKERS 21 AND 40.
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 3408 11600 3408 11603 3412 11606 3412 11626
3422 11628 3421 11594 3404 11594 3404 11600
$$
JGG2 follow-up statements
123
WGUS75 KVEF 052112
FFSVEF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
212 PM PDT TUE JUL 5 2011
CAC071-052230-
/O.CON.KVEF.FF.W.0014.000000T0000Z-110705T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN BERNARDINO CA-
212 PM PDT TUE JUL 5 2011
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 330 PM PDT FOR SOUTH
CENTRAL SAN BERNARDINO COUNTY...
AT 208 PM PDT...TRAINED WEATHER SPOTTERS REPORTED SIX TO TWELVE
INCHES OF WATER ACROSS HIGHWAY 62 IN TWENTYNINE PALMS. THIS STORM
WAS LOCATED NEAR TWENTYNINE PALMS. THE THUNDERSTORM WITH EXCESSIVE
RAIN WAS NEARLY STATIONARY. RADAR INDICATES STORMS WILL PERSIST FOR
SOME TIME AND ONE TO TWO INCHES OF ADDITIONAL RAINFALL WILL BE
POSSIBLE.
LOCATIONS IMPACTED INCLUDE...TWENTYNINE PALMS AND JOSHUA TREE LAKE
CAMPGROUND...AS WELL AS HIGHWAY 62 BETWEEN MILE MARKERS 21 AND 40.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FLASH FLOODING IS EXPECTED ON AREA ROADWAYS...AROUND UNDERPASSES...
AND IN NORMALLY DRY WASHES AND LOW LYING AREAS. FLASH FLOODING IS
NATURES NUMBER ONE KILLER. NEVER TRY TO CROSS A FLOODED ROADWAY OR
WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN!
REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL
WEATHER SERVICE FACEBOOK PAGE OR TWITTER #NWSVEGAS.
&&
LAT...LON 3408 11600 3408 11603 3412 11606 3412 11626
3422 11628 3421 11594 3404 11594 3404 11600
$$
JGG998
WGUS75 KVEF 052229
FFSVEF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
329 PM PDT TUE JUL 5 2011
CAC071-052232-
/O.EXP.KVEF.FF.W.0014.000000T0000Z-110705T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN BERNARDINO CA-
329 PM PDT TUE JUL 5 2011
...THE FLASH FLOOD WARNING WILL EXPIRE AT 330 PM PDT FOR SOUTH
CENTRAL SAN BERNARDINO COUNTY...
THE HEAVY RAIN HAS MOVED TO THE NORTHWEST TOWARD INTERSTATE 40 AND
THE FLASH FLOOD WARNING FOR SOUTH CENTRAL SAN BERNARDINO COUNTY WILL
BE ALLOWED TO EXPIRE AT 330 PM. WASHES WILL CONTINUE TO RUN RAPIDLY
AND LOW WATER CROSSING MAY STILL HAVE WATER FLOWING ACROSS THEM FOR
THE REMAINDER OF THE AFTERNOON.
LAT...LON 3408 11600 3408 11603 3412 11606 3412 11626
3422 11628 3421 11594 3404 11594 3404 11600
$$
SCThe office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 4, 5:46 PM PDT | Flash Flood Warning | VEF | Inyo | 119 min |
| Jul 4, 6:52 PM PDT | Flash Flood Warning | VEF | Inyo | 113 min |
| Jul 5, 1:48 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Jul 5, 2:01 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 33 min |
| Jul 5, 2:06 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 24 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.