Alert archive / California / Flash Flood Warnings in 2012
Flash Flood Warning 163, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Aug 22, 2012, 1:55 PM PDT for San Bernardino County, California. It was in force for 3 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 22, 2012, 1:55 PM PDT (20:55 UTC)
- Expired
- Aug 22, 2012, 5:00 PM PDT
- In force
- 3 hr
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
- Flood severity
- None
County San Bernardino County, CA
The radar
The San Diego radar (KNKX), 187 km from the middle of the area, began a volume at 20:55 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
Yuma Intl Airpor, AZ (KYUM), launched 12:00Z, 8.9 hours before the alert went out and 187 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
- 193 J/kg
- Mixed-layer CIN
- -270 J/kg
- Mixed-layer LCL
- 1539 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- 127 m²/s²
- 0-3 km storm-relative helicity
- 136 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
960
WGUS55 KVEF 222055
FFWVEF
CAC071-222300-
/O.NEW.KVEF.FF.W.0163.120822T2055Z-120822T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
155 PM PDT WED AUG 22 2012
THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTH CENTRAL SAN BERNARDINO COUNTY IN SOUTHERN CALIFORNIA...
* UNTIL 400 PM PDT.
* AT 152 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
VERY HEAVY RAIN FROM A THUNDERSTORM OVER EXTREME SOUTH CENTRAL SAN
BERNARDINO COUNTY...OR 24 MILES EAST OF TWENTYNINE PALMS. THE STORM
PRODUCING VERY HEAVY RAIN WAS MOVING NORTHEAST AT 15 MPH...AND
WILL AFFECT HIGHWAY 62 BETWEEN MILE MARKERS 50 AND 67.
* LOCATIONS IMPACTED INCLUDE...
HIGHWAY 62 EAST OF TWENTYNINE PALMS.
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 BY USING THE TWITTER HASHTAG...
NWSVEGAS.
&&
LAT...LON 3419 11575 3419 11548 3412 11548 3412 11553
3407 11555 3409 11560 3404 11560 3403 11561
3403 11575
$$
MORGAN3 follow-up statements
564
WGUS75 KVEF 222147
FFSVEF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
247 PM PDT WED AUG 22 2012
CAC071-222300-
/O.CON.KVEF.FF.W.0163.000000T0000Z-120822T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN BERNARDINO CA-
247 PM PDT WED AUG 22 2012
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 400 PM PDT FOR SOUTH
CENTRAL SAN BERNARDINO COUNTY...
AT 243 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE THUNDERSTORMS PRODUCING HEAVY RAIN OVER HIGHWAY 62 ABOUT 27
MILES EAST OF TWENTYNINE PALMS. THE THUNDERSTORMS WERE NEARLY
STATIONARY.
LOCATIONS IMPACTED INCLUDE...
HIGHWAY 62 BETWEEN MILE MARKERS 50 AND 67.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON
AREA ROADWAYS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. TO ESCAPE
RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED
ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN!
REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL
WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER HASHTAG...
NWSVEGAS.
&&
LAT...LON 3419 11575 3419 11548 3412 11548 3412 11553
3407 11555 3409 11560 3404 11560 3403 11561
3403 11575
$$
MORGAN273
WGUS55 KVEF 222252
FFWVEF
CAC071-230000-
/O.EXT.KVEF.FF.W.0163.000000T0000Z-120823T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
352 PM PDT WED AUG 22 2012
THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS EXTENDED THE
* FLASH FLOOD WARNING FOR...
SOUTH CENTRAL SAN BERNARDINO COUNTY IN SOUTHERN CALIFORNIA...
* UNTIL 500 PM PDT.
* AT 350 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
HEAVY RAIN CONTINUING OVER HIGHWAY 62 EAST OF TWENTYNINE PALMS.
FLOODING OF THE HIGHWAY REMAINS POSSIBLE.
* LOCATIONS IMPACTED INCLUDE...
HIGHWAY 62 BETWEEN MILE MARKERS 50 AND 67.
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 BY USING THE TWITTER HASHTAG...
NWSVEGAS.
&&
LAT...LON 3419 11575 3419 11548 3412 11548 3412 11553
3407 11555 3409 11560 3404 11560 3403 11561
3403 11575
$$
MORGAN213
WGUS75 KVEF 222353
FFSVEF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
453 PM PDT WED AUG 22 2012
CAC071-230002-
/O.EXP.KVEF.FF.W.0163.000000T0000Z-120823T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN BERNARDINO CA-
453 PM PDT WED AUG 22 2012
...THE FLASH FLOOD WARNING WILL EXPIRE AT 500 PM PDT FOR SOUTH
CENTRAL SAN BERNARDINO COUNTY...
AT 452 PM PDT...RADAR INDICATED THAT RAIN WAS BEGINNING TO LET UP ON
HIGHWAY 62 BETWEEN MILE MARKERS 50 AND 67. NO REPORTS OF FLOODING
HAD BEEN RECEIVED FROM THIS AREA...SO THE FLASH FLOOD WARNING WILL
BE ALLOWED TO EXPIRE.
LAT...LON 3419 11575 3419 11548 3412 11548 3412 11553
3407 11555 3409 11560 3404 11560 3403 11561
3403 11575
$$
MORGANThe office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 21, 7:57 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 48 min |
| Aug 22, 3:53 AM PDT | Areal Flood Advisory | VEF | Inyo | 3 hr |
| Aug 22, 9:19 AM PDT | Areal Flood Advisory | VEF | Inyo, San Bernardino | 3 hr |
| Aug 22, 9:34 AM PDT | Flash Flood Warning | VEF | Inyo, San Bernardino | 116 min |
| Aug 22, 9:45 AM PDT | Flash Flood Warning | VEF | San Bernardino | 2 hr |
| Aug 22, 10:05 AM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 25 min |
| Aug 22, 10:45 AM PDT | Flash Flood Warning | VEF | San Bernardino | 2 hr |
| Aug 22, 10:49 AM PDT | Flash Flood Warning | VEF | San Bernardino | 116 min |
| Aug 22, 11:27 AM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 48 min |
| Aug 22, 11:30 AM PDT | Flash Flood Warning | VEF | San Bernardino | 56 min |
| Aug 22, 11:50 AM PDT | Flash Flood Warning | VEF | San Bernardino | 54 min |
| Aug 22, 11:58 AM PDT | Flash Flood Warning | VEF | San Bernardino | 2 hr |
| Aug 22, 1:03 PM PDT | Flash Flood Warning | VEF | San Bernardino | 87 min |
| Aug 22, 1:42 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Aug 22, 1:47 PM PDT | Flash Flood Warning | VEF | Inyo | 36 min |
| Aug 22, 1:50 PM PDT | Flash Flood Warning | VEF | San Bernardino | 115 min |
| Aug 22, 2:57 PM PDT | Flash Flood Warning | VEF | Inyo | 2 hr |
| Aug 22, 3:55 PM PDT | Flash Flood Warning | VEF | Inyo | 65 min |
Nearby
Flash Flood Warnings in California, 2012Every flash flood warning in 2012
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.