Alert archive / California / Flash Flood Warnings in 2005

Flash Flood Warning 41, NWS Las Vegas, NV

August 3, 2005San Bernardino County, California

NWS Las Vegas, NV issued this flash flood warning at Aug 3, 2005, 2:45 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 3, 2005, 2:45 PM PDT (21:45 UTC)
Expired
Aug 3, 2005, 4:45 PM PDT
In force
2 hr
Issued by
NWS Las Vegas, NV
Area
Counties, with a storm outline in the text

County San Bernardino County, CA

The radar

The Las Vegas radar (KESX), 82 km from the middle of the area, began a volume at 21:46 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

Mercury/Desert R, NV (KDRA), launched 12:00Z, 9.8 hours before the alert went out and 102 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.

Skew-T log-pSkew-T log-p diagram, Mercury/Desert R, NV at 12:00Z on 2005-08-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 629 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Mercury/Desert R, NV at 12:00Z on 2005-08-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 19 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
629 J/kg
Mixed-layer CIN
-154 J/kg
Mixed-layer LCL
1765 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
19 m²/s²
0-3 km storm-relative helicity
41 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WGUS55 KVEF 032147
FFWVEF
CAC071-032345-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
245 PM PDT WED AUG 3 2005

THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EXTREME NORTH CENTRAL SAN BERNARDINO COUNTY IN SOUTHEAST CALIFORNIA

* UNTIL 445 PM PDT

* AT 234 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
  FLASH FLOODING FROM A THUNDERSTORM ALONG EXCELSIOR MINE ROAD 
  BETWEEN THE JUNCTION OF KINGSTON ROAD AND THE INYO COUNTY LINE.

* THE STORM PRODUCING FLASH FLOODING WILL OTHERWISE REMAIN OVER
  MAINLY RURAL AREAS OF THE INDICATED COUNTY.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY.
MOVE TO HIGHER GROUND.

LAT...LON 3579 11573 3579 11593 3559 11589 3563 11573

$$

ASG
2 follow-up statements
000
WGUS75 KVEF 032237
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
335 PM PDT WED AUG 3 2005

CAC071-032345-
SAN BERNARDINO CA-
335 PM PDT WED AUG 3 2005

...A FLASH FLOOD WARNING CONTINUES UNTIL 445 PM PDT FOR EXTREME 
NORTH CENTRAL SAN BERNARDINO COUNTY...

AT 327 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR HAS SHOWN A 
DECREASE IN INTENSITY WITH THE THUNDERSTORM OVER EXTREME NORTHEAST 
SAN BERNARDINO COUNTY. HOWEVER...FLASH FLOODING ALONG EXCELSIOR MINE 
ROAD BETWEEN THE JUNCTION OF KINGSTON ROAD AND THE INYO COUNTY LINE 
IS LIKELY OCCURRING.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY.
MOVE TO HIGHER GROUND.

LAT...LON 3579 11573 3579 11593 3559 11589 3563 11573

$$

ASG
000
WGUS75 KVEF 032344
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
442 PM PDT WED AUG 3 2005

CAC071-032355-
SAN BERNARDINO CA-
442 PM PDT WED AUG 3 2005

...THE FLASH FLOOD WARNING FOR EXTREME NORTH CENTRAL SAN BERNARDINO 
COUNTY HAS BEEN ALLOWED TO EXPIRE AT 445 PM PDT...

RADAR DATA HAS INDICATED THAT THUNDERSTORMS OVER EXTREME NORTH 
CENTRAL SAN BERNARDINO COUNTY HAVE DISSIPATED AND THE THREAT FOR ANY 
ADDITIONAL HEAVY RAIN HAS PASSED. 

MINOR RUNOFF IN WASHES AND DRAINAGES WILL CONTINUE FOR SEVERAL MORE 
HOURS. MOTORISTS SHOULD CONTINUE TO EXERCISE CAUTION IN THIS AREA.

LAT...LON 3579 11573 3579 11593 3559 11589 3563 11573

$$

ASG

The office that day

Everything else NWS Las Vegas, NV issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 3, 1:07 AM PDTSevere Thunderstorm WarningVEFSan Bernardino40 min
Aug 3, 2:04 PM PDTFlash Flood WarningVEFSan Bernardino3 hr
Aug 3, 2:16 PM PDTSevere Thunderstorm WarningVEFSan Bernardino44 min

Nearby

Flash Flood Warnings in California, 2005Every flash flood warning in 2005

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.