Alert archive / California / Flash Flood Warnings in 2012
Flash Flood Warning 159, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Aug 22, 2012, 1:03 PM PDT for San Bernardino County, California. It was in force for 87 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
- Aug 22, 2012, 1:03 PM PDT (20:03 UTC)
- Expired
- Aug 22, 2012, 2:30 PM PDT
- In force
- 87 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, 8.1 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
- 296 J/kg
- Mixed-layer CIN
- -130 J/kg
- Mixed-layer LCL
- 1290 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 103 m²/s²
- 0-3 km storm-relative helicity
- 176 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 3.4
The text
As transmitted, in the capitals the NWS used until 2016.
102 WGUS55 KVEF 222003 FFWVEF CAC071-222130- /O.NEW.KVEF.FF.W.0159.120822T2003Z-120822T2130Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 103 PM PDT WED AUG 22 2012 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A * FLASH FLOOD WARNING FOR... CENTRAL SAN BERNARDINO COUNTY IN SOUTHERN CALIFORNIA... * UNTIL 230 PM PDT. * AT 1259 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN FROM THUNDERSTORMS APPROACHING INTERSTATE 40 AND NATIONAL TRAILS HIGHWAY. THESE STORMS COULD CAUSE FLOODING OF NATIONAL TRAILS HIGHWAY...ESPECIALLY FROM LUDLOW TO 12 MILES SOUTHEAST OF LUDLOW. * LOCATIONS IMPACTED INCLUDE... NATIONAL TRAILS HIGHWAY. THIS INCLUDES INTERSTATE 40 BETWEEN MILE MARKERS 39 AND 63. 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 3482 11636 3479 11590 3458 11592 3465 11641 $$ MORGAN
2 follow-up statements
451 WGUS75 KVEF 222037 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 137 PM PDT WED AUG 22 2012 CAC071-222130- /O.CON.KVEF.FF.W.0159.000000T0000Z-120822T2130Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN BERNARDINO CA- 137 PM PDT WED AUG 22 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 230 PM PDT FOR CENTRAL SAN BERNARDINO COUNTY... AT 129 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING VERY HEAVY RAIN OVER INTERSTATE 40 AND NATIONAL TRAILS HIGHWAY NEAR AND EAST OF LUDLOW. THE THUNDERSTORMS WITH EXCESSIVE RAIN WERE MOVING NORTHEAST AT 20 MPH. LOCATIONS IMPACTED INCLUDE... LUDLOW...NATIONAL TRAILS HIGHWAY NEAR AND EAST OF LUDLOW. THIS INCLUDES INTERSTATE 40 BETWEEN MILE MARKERS 39 AND 63. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON AREA ROADWAYS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. TO ESCAPE RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN! REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER HASHTAG... NWSVEGAS. && LAT...LON 3482 11636 3479 11590 3458 11592 3465 11641 $$ MORGAN
216 WGUS75 KVEF 222121 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 221 PM PDT WED AUG 22 2012 CAC071-222131- /O.EXP.KVEF.FF.W.0159.000000T0000Z-120822T2130Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN BERNARDINO CA- 221 PM PDT WED AUG 22 2012 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 230 PM PDT FOR CENTRAL SAN BERNARDINO COUNTY... AT 220 PM PDT...RADAR INDICATED THAT RAIN HAD ENDED OVER THE LUDLOW AREA. NO REPORTS OF FLOODING HAD BEEN RECEIVED FROM THIS AREA...SO THE FLASH FLOOD WARNING WILL BE ALLOWED TO EXPIRE. LAT...LON 3482 11636 3479 11590 3458 11592 3465 11641 $$ MORGAN
The 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, 1:42 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; the sounding from the Mesonet's radiosonde archive.