Alert archive / California / Flash Flood Warnings in 2008
Flash Flood Warning 39, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Aug 4, 2008, 3:58 PM PDT for San Bernardino County, California. It was in force for 2 hr. 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
- Aug 4, 2008, 3:58 PM PDT (22:58 UTC)
- Expired
- Aug 4, 2008, 6:04 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 radar
The Santa Ana Mts radar (KSOX), 168 km from the middle of the area, began a volume at 23:04 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 |
|---|---|---|---|
| Aug 4, 4:20 PM PDT | FLASH FLOOD | Twentynine Palms Mcas, CA | A TRAINED SPOTTER REPORTED THAT THERE A SWIFT WATER RESCUE OCCURRED AT THE MAIN GATE OF THE MARINE CORPS AIR STATION. |
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, 11.0 hours before the alert went out and 192 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
- 2165 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 67 m²/s²
- 0-3 km storm-relative helicity
- 60 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 042258
FFWVEF
CAC071-050200-
/O.NEW.KVEF.FF.W.0039.080804T2258Z-080805T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
358 PM PDT MON AUG 4 2008
THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTH CENTRAL SAN BERNARDINO COUNTY IN SOUTHEAST CALIFORNIA...
* UNTIL 700 PM PDT.
* AT 347 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
MORE THUNDERSTORMS WITH HEAVY RAIN MOVING INTO THE WARNED AREA. LAW
ENFORCEMENT WAS REPORTING EXTREME FLOODING OF HIGHWAY 62 AT MILE
MARKER 46.
* LOCATIONS IMPACTED INCLUDE...TWENTYNINE PALMS...TWENTYNINE PALMS
MCAS AND WEST WIND AERO.
LAT...LON 3408 11600 3408 11603 3412 11606 3413 11614
3423 11615 3426 11553 3412 11551 3407 11556
3409 11560 3403 11561 3402 11599
$$
JH2 follow-up statements
000
WGUS75 KVEF 050011
FFSVEF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
511 PM PDT MON AUG 4 2008
CAC071-050200-
/O.CON.KVEF.FF.W.0039.000000T0000Z-080805T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN BERNARDINO CA-
511 PM PDT MON AUG 4 2008
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 700 PM PDT FOR SOUTH
CENTRAL SAN BERNARDINO COUNTY...
AT 500 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
RAINFALL HAD PRETTY MUCH ENDED IN THE TWENTYNINE PALMS AREA.
HOWEVER...RUNOFF FROM EARLIER RAIN MAY STILL CAUSE FLOODING
PROBLEMS. SOME ROADWAYS IN THE AREA WERE STILL CLOSED AND AS OF 405
PM ALL GATES TO THE TWENTYNINE PALMS MCAS WERE CLOSED.
LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WEST WIND
AERO...TWENTYNINE PALMS MCAS AND TWENTYNINE PALMS
LAT...LON 3408 11600 3408 11603 3412 11606 3413 11614
3423 11615 3426 11553 3412 11551 3407 11556
3409 11560 3403 11561 3402 11599
$$
JH000
WGUS75 KVEF 050104
FFSVEF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
604 PM PDT MON AUG 4 2008
CAC071-050111-
/O.CAN.KVEF.FF.W.0039.000000T0000Z-080805T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN BERNARDINO CA-
604 PM PDT MON AUG 4 2008
...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR SOUTH CENTRAL SAN
BERNARDINO COUNTY...
NO RAIN HAS FALLEN IN OR NEAR THE TWENTYNINE PALMS AREA FOR OVER AN
HOUR AS OF 600 PM. GATES INTO THE TWENTYNINE PALMS MCAS HAVE BEEN
OPENED AND FLOODWATERS IN THE AREA HAVE BEEN RECEDING.
LAT...LON 3408 11600 3408 11603 3412 11606 3413 11614
3423 11615 3426 11553 3412 11551 3407 11556
3409 11560 3403 11561 3402 11599
$$
JHThe office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 3, 5:11 PM PDT | Tornado Warning | VEF | San Bernardino | 18 min |
| Aug 3, 5:32 PM PDT | Areal Flood Advisory | VEF | San Bernardino | 88 min |
| Aug 3, 5:57 PM PDT | Areal Flood Advisory | VEF | San Bernardino | 2 hr |
| Aug 4, 4:05 AM PDT | Flash Flood Watch | VEF | San Bernardino | 17 hr |
| Aug 4, 11:59 AM PDT | Flash Flood Warning | VEF | San Bernardino | 2 hr |
| Aug 4, 1:14 PM PDT | Areal Flood Advisory | VEF | San Bernardino | 2 hr |
| Aug 4, 1:44 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 46 min |
| Aug 4, 1:57 PM PDT | Flash Flood Warning | VEF | San Bernardino | 2 hr |
| Aug 4, 2:52 PM PDT | Areal Flood Advisory | VEF | San Bernardino | 3 hr |
| Aug 4, 3:05 PM PDT | Areal Flood Advisory | VEF | San Bernardino | 115 min |
| Aug 4, 3:27 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 48 min |
Nearby
Flash Flood Warnings in California, 2008Every flash flood warning in 2008
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.