Alert archive / California / Flash Flood Warnings in 2012
Flash Flood Warning 72, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Jul 31, 2012, 1:30 PM PDT for San Bernardino County, California. It was in force for 49 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 31, 2012, 1:30 PM PDT (20:30 UTC)
- Expired
- Jul 31, 2012, 2:19 PM PDT
- In force
- 49 min
- 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 12:00Z, 8.5 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
- 121 J/kg
- Mixed-layer CIN
- -75 J/kg
- Mixed-layer LCL
- 1334 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- -5 m²/s²
- 0-3 km storm-relative helicity
- -43 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
675 WGUS55 KVEF 312030 FFWVEF CAC071-312230- /O.NEW.KVEF.FF.W.0072.120731T2030Z-120731T2230Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 130 PM PDT TUE JUL 31 2012 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A * FLASH FLOOD WARNING FOR... CENTRAL SAN BERNARDINO COUNTY IN SOUTHERN CALIFORNIA... * UNTIL 330 PM PDT. * AT 125 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN FROM THUNDERSTORMS APPROACHING INTERSTATE 40 NEAR AND EAST OF LUDLOW. LOW WATER CROSSINGS ON NATIONAL TRAILS HIGHWAY WILL BE AT RISK OF FLOODING...ALONG WITH THE TOWN OF LUDLOW. * LOCATIONS IMPACTED INCLUDE... LUDLOW. THIS INCLUDES INTERSTATE 40 BETWEEN MILE MARKERS 47 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 3477 11624 3474 11583 3456 11590 3469 11625 $$ MORGAN
1 follow-up statement
534 WGUS75 KVEF 312119 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 219 PM PDT TUE JUL 31 2012 CAC071-312128- /O.CAN.KVEF.FF.W.0072.000000T0000Z-120731T2230Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN BERNARDINO CA- 219 PM PDT TUE JUL 31 2012 ...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR CENTRAL SAN BERNARDINO COUNTY... AT 215 PM PDT...RADAR INDICATED ONLY LIGHT RAIN REMAINING OVER LUDLOW AND NATIONAL TRAILS HIGHWAY. NO REPORTS OF FLOODING HAD BEEN RECEIVED...SO THE FLASH FLOOD WARNING HAS BEEN CANCELLED. THIS INCLUDES INTERSTATE 40 BETWEEN MILE MARKERS 47 AND 67. LAT...LON 3477 11624 3474 11583 3456 11590 3469 11625 $$ MORGAN
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 30, 5:54 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 51 min |
| Jul 31, 2:29 AM PDT | Flash Flood Watch | VEF | San Bernardino | 19 hr |
| Jul 31, 10:00 AM PDT | Flash Flood Warning | VEF | San Bernardino | 2 hr |
| Jul 31, 10:08 AM PDT | Flash Flood Warning | VEF | San Bernardino | 112 min |
| Jul 31, 10:38 AM PDT | Flash Flood Warning | VEF | San Bernardino | 94 min |
| Jul 31, 11:58 AM PDT | Flash Flood Warning | VEF | San Bernardino | 2 hr |
| Jul 31, 12:03 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Jul 31, 2:00 PM PDT | Flash Flood Warning | VEF | San Bernardino | 2 hr |
| Jul 31, 3:05 PM PDT | Flash Flood Warning | VEF | San Bernardino | 42 min |
| Jul 31, 3:25 PM PDT | Flash Flood Warning | VEF | San Bernardino | 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.