Alert archive / California / Flash Flood Warnings in 2012
Flash Flood Warning 154, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Aug 22, 2012, 11:30 AM PDT for San Bernardino County, California. It was in force for 56 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
- Aug 22, 2012, 11:30 AM PDT (18:30 UTC)
- Expired
- Aug 22, 2012, 12:26 PM PDT
- In force
- 56 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), 121 km from the middle of the area, began a volume at 18:32 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 22, 11:30 AM PDT | FLASH FLOOD | 1 Ne Joshua Tree, CA | THE CALIFORNIA HIGHWAY PATROL REPORTED THAT WATER FLOWED OVER STATE ROUTE 62 NEAR SUNBURST STREET LEAVING MUD AND DEBRIS ON THE HIGHWAY. |
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, 6.5 hours before the alert went out and 168 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
- 596 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 5 m²/s²
- 0-3 km storm-relative helicity
- 6 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted, in the capitals the NWS used until 2016.
696
WGUS55 KVEF 221830
FFWVEF
CAC071-222030-
/O.NEW.KVEF.FF.W.0154.120822T1830Z-120822T2030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
1130 AM 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 130 PM PDT.
* AT 1126 AM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
VERY HEAVY RAIN FROM THUNDERSTORMS EXTENDING FROM YUCCA VALLEY TO
JOSHUA TREE. THESE STORMS WILL PRODUCE VERY HEAVY RAIN WHICH COULD
FLOOD HIGHWAYS 62 AND 247.
* LOCATIONS IMPACTED INCLUDE...
HIGHWAYS 62 AND 247.
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 3407 11649 3413 11649 3420 11644 3429 11645
3429 11641 3413 11621 3412 11626 3408 11627
$$
MORGAN1 follow-up statement
517
WGUS75 KVEF 221926
FFSVEF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
1226 PM PDT WED AUG 22 2012
CAC071-221935-
/O.CAN.KVEF.FF.W.0154.000000T0000Z-120822T2030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN BERNARDINO CA-
1226 PM PDT WED AUG 22 2012
...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR SOUTH CENTRAL SAN
BERNARDINO COUNTY...
AT 1225 PM PDT...RADAR INDICATED THAT HEAVY RAIN HAD ENDED OVER THE
SOUTHERN END OF HIGHWAY 247 AS WELL AS HIGHWAY 62 WEST OF MILE
MARKER 24. NO REPORTS OF FLOODING HAD BEEN RECEIVED FROM THIS
AREA...SO THE FLASH FLOOD WARNING HAS BEEN CANCELLED.
A FLASH FLOOD WARNING REMAINS IN EFFECT FOR AREAS JUST TO THE NORTH
AND EAST UNTIL 145 PM PDT.
LAT...LON 3407 11649 3413 11649 3420 11644 3429 11645
3429 11641 3413 11621 3412 11626 3408 11627
$$
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, 11:50 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, 1:55 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.