Alert archive / California / Flash Flood Warnings in 2012
Flash Flood Warning 151, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Aug 22, 2012, 10:45 AM PDT for San Bernardino County, California. It was in force for 2 hr. 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, 10:45 AM PDT (17:45 UTC)
- Expired
- Aug 22, 2012, 12:45 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 radar
The Las Vegas radar (KESX), 65 km from the middle of the area, began a volume at 17:49 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, 12:34 PM PDT | FLASH FLOOD | 1 Se Mountain Pass, CA | ROCKS AND DEBRIS WERE WASHED ACROSS THE BAILEY ROAD OFFRAMP FROM INTERSTATE 15 NORTHBOUND. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Las Vegas, NV (KVEF), launched 12:00Z, 5.8 hours before the alert went out and 97 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.
603 WGUS55 KVEF 221745 FFWVEF CAC071-221945- /O.NEW.KVEF.FF.W.0151.120822T1745Z-120822T1945Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 1045 AM PDT WED AUG 22 2012 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A * FLASH FLOOD WARNING FOR... NORTH CENTRAL SAN BERNARDINO COUNTY IN SOUTHERN CALIFORNIA... * UNTIL 1245 PM PDT. * AT 1043 AM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN FROM THUNDERSTORMS NEAR AND SOUTHEAST OF MOUNTAIN PASS. THESE STORMS WERE MOVING NORTHEAST AT 25 MPH. * LOCATIONS IMPACTED INCLUDE... MOUNTAIN PASS...AND CIMA...NIPTON AND IVANPAH ROADS. THIS INCLUDES INTERSTATE 15 BETWEEN MILE MARKERS 165 AND 183. 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 3561 11582 3560 11546 3539 11523 3532 11552 $$ MORGAN
2 follow-up statements
772 WGUS75 KVEF 221846 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 1146 AM PDT WED AUG 22 2012 CAC071-221945- /O.CON.KVEF.FF.W.0151.000000T0000Z-120822T1945Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN BERNARDINO CA- 1146 AM PDT WED AUG 22 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1245 PM PDT FOR NORTH CENTRAL SAN BERNARDINO COUNTY... AT 1143 AM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED LIGHT TO MODERATE RAIN REMAINING IN THE MOUNTAIN PASS AREA AND OVER THE NORTHERN PORTIONS OF THE MOJAVE PRESERVE. ALTHOUGH THE RAIN WAS LETTING UP...RUNOFF FROM EARLIER HEAVY RAIN WILL CONTINUE THROUGH 1245 PM PDT...POSSIBLY FLOODING SECONDARY ROADS IN THE AREA. LOCATIONS IMPACTED INCLUDE... MOUNTAIN PASS...CIMA ROAD...NIPTON ROAD...IVANPAH ROAD. THIS INCLUDES INTERSTATE 15 BETWEEN MILE MARKERS 165 AND 183. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON AREA ROADWAYS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. TO ESCAPE RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN! REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER HASHTAG... NWSVEGAS. && LAT...LON 3561 11582 3560 11546 3539 11523 3532 11552 $$ MORGAN
310 WGUS75 KVEF 221937 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 1237 PM PDT WED AUG 22 2012 CAC071-221946- /O.EXP.KVEF.FF.W.0151.000000T0000Z-120822T1945Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN BERNARDINO CA- 1237 PM PDT WED AUG 22 2012 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 1245 PM PDT FOR NORTH CENTRAL SAN BERNARDINO COUNTY... AT 1235 PM PDT...RADAR INDICATED LIGHT TO MODERATE RAIN OVER THE MOUNTAIN PASS AND CIMA AREA. THE HEAVY RAIN THREAT HAD ENDED FOR THE TIME BEING...SO THE FLASH FLOOD WARNING WILL BE ALLOWED TO EXPIRE. LAT...LON 3561 11582 3560 11546 3539 11523 3532 11552 $$ 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, 10:49 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, 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.