Alert archive / California / Flash Flood Warnings in 2012
Flash Flood Warning 195, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Sep 10, 2012, 6:00 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
- Sep 10, 2012, 6:00 PM PDT (01:00 UTC)
- Expired
- Sep 10, 2012, 8:00 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 nearest sounding before it
Las Vegas, NV (KVEF), launched 00:00Z, 1.0 hours before the alert went out and 191 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
- 3264 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 2 m²/s²
- 0-3 km storm-relative helicity
- 37 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
022 WGUS55 KVEF 110100 FFWVEF CAC071-110300- /O.NEW.KVEF.FF.W.0195.120911T0100Z-120911T0300Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 600 PM PDT MON SEP 10 2012 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A * FLASH FLOOD WARNING FOR... NORTHWESTERN SAN BERNARDINO COUNTY IN SOUTHERN CALIFORNIA... * UNTIL 800 PM PDT. * AT 558 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN FROM A THUNDERSTORM OVER EXTREME NORTHWESTERN SAN BERNARDINO COUNTY...OR 12 MILES NORTHEAST OF RIDGECREST. THE STORM PRODUCING VERY HEAVY RAIN WAS NEARLY STATIONARY. WATER WILL LIKELY FLOW OVER TRONA ROAD AT POISON CANYON. * LOCATIONS IMPACTED INCLUDE... TRONA ROAD. 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 3579 11758 3571 11734 3561 11740 3567 11759 $$ MORGAN
2 follow-up statements
394 WGUS75 KVEF 110203 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 703 PM PDT MON SEP 10 2012 CAC071-110300- /O.CON.KVEF.FF.W.0195.000000T0000Z-120911T0300Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN BERNARDINO CA- 703 PM PDT MON SEP 10 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 800 PM PDT FOR NORTHWESTERN SAN BERNARDINO COUNTY... AT 659 PM PDT...RADAR SHOWED THAT THUNDERSTORMS IN THE TRONA AREA HAD DISSIPATED. HOWEVER...VERY HEAVY RAIN FELL IN POISON CANYON...AND WATER FROM THE CANYON COULD STILL FLOOD TRONA ROAD. LOCATIONS IMPACTED INCLUDE... TRONA ROAD. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON AREA ROADWAYS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. TO ESCAPE RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN! REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER HASHTAG... NWSVEGAS. && LAT...LON 3579 11758 3571 11734 3561 11740 3567 11759 $$ MORGAN
343 WGUS75 KVEF 110251 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 751 PM PDT MON SEP 10 2012 CAC071-110300- /O.EXP.KVEF.FF.W.0195.000000T0000Z-120911T0300Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN BERNARDINO CA- 751 PM PDT MON SEP 10 2012 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 800 PM PDT FOR NORTHWESTERN SAN BERNARDINO COUNTY... AT 750 PM PDT...RADAR SHOWED NO RAIN REMAINING IN THE TRONA AREA. NO REPORTS OF FLOODING HAD BEEN RECEIVED...SO THE FLASH FLOOD WARNING WILL BE ALLOWED TO EXPIRE. LAT...LON 3579 11758 3571 11734 3561 11740 3567 11759 $$ MORGAN
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 11, 1:20 PM PDT | Flash Flood Warning | VEF | Inyo | 3 hr |
| Sep 11, 2:03 PM PDT | Flash Flood Warning | VEF | Inyo | 117 min |
| Sep 11, 3:57 PM PDT | Flash Flood Warning | VEF | San Bernardino | 2 hr |
| Sep 11, 4:02 PM PDT | Flash Flood Warning | VEF | Inyo | 57 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.