Alert archive / California / Flash Flood Warnings in 2012
Flash Flood Warning 71, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Jul 31, 2012, 12:03 PM PDT for San Bernardino County, California. It was in force for 3 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
- Jul 31, 2012, 12:03 PM PDT (19:03 UTC)
- Expired
- Jul 31, 2012, 3:30 PM PDT
- In force
- 3 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), 107 km from the middle of the area, began a volume at 19:07 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 |
|---|---|---|---|
| Jul 31, 1:15 PM PDT | FLASH FLOOD | 20 S Kelso, CA | CALIFORNIA HIGHWAY PATROL REPORTS PARTS OF KELBAKER ROAD NEAR I-40 ARE COVERED WITH MUD AND ROCKS. |
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, 7.1 hours before the alert went out and 158 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.
585 WGUS55 KVEF 311903 FFWVEF CAC071-312100- /O.NEW.KVEF.FF.W.0071.120731T1903Z-120731T2100Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 1203 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 200 PM PDT. * AT 1155 AM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN APPROACHING KELBAKER ROAD BETWEEN INTERSTATE 40 AND KELSO. FLOODING OF LOW WATER CROSSINGS IS LIKELY...INCLUDING IN THE KELSO AREA. * LOCATIONS IMPACTED INCLUDE... KELSO AND KELBAKER 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 3512 11570 3509 11554 3473 11558 3472 11571 $$ MORGAN
4 follow-up statements
414 WGUS75 KVEF 312000 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 100 PM PDT TUE JUL 31 2012 CAC071-312100- /O.CON.KVEF.FF.W.0071.000000T0000Z-120731T2100Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN BERNARDINO CA- 100 PM PDT TUE JUL 31 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 200 PM PDT FOR CENTRAL SAN BERNARDINO COUNTY... AT 1255 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED ANOTHER THUNDERSTORM PRODUCING VERY HEAVY RAIN APPROACHING KELBAKER ROAD. HEAVY RAIN HAD ALREADY FALLEN IN THIS AREA...AND ADDITIONAL RAIN WILL CAUSE FLASH FLOODING. LOCATIONS IMPACTED INCLUDE... KELSO AND KELBAKER ROAD. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON AREA ROADWAYS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. TO ESCAPE RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN! REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER HASHTAG... NWSVEGAS. && LAT...LON 3512 11570 3509 11554 3473 11558 3472 11571 $$ MORGAN
963 WGUS55 KVEF 312055 RRA FFWVEF CAC071-312230- /O.EXT.KVEF.FF.W.0071.000000T0000Z-120731T2230Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 155 PM PDT TUE JUL 31 2012 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS EXTENDED THE * FLASH FLOOD WARNING FOR... CENTRAL SAN BERNARDINO COUNTY IN SOUTHERN CALIFORNIA... * UNTIL 330 PM PDT. * AT 149 PM PDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED THAT KELBAKER ROAD WAS IMPASSABLE DUE TO MUD AND ROCKS OVER THE ROAD. ADDITIONAL HEAVY RAIN IS LIKELY...SO THE FLASH FLOOD WARNING HAS BEEN EXTENDED. * LOCATIONS IMPACTED INCLUDE... KELSO AND KELBAKER 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 3512 11570 3509 11554 3473 11558 3472 11571 $$ MORGAN
545 WGUS75 KVEF 312137 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 237 PM PDT TUE JUL 31 2012 CAC071-312230- /O.CON.KVEF.FF.W.0071.000000T0000Z-120731T2230Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN BERNARDINO CA- 237 PM PDT TUE JUL 31 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 330 PM PDT FOR CENTRAL SAN BERNARDINO COUNTY... AT 231 PM PDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED THAT KELBAKER ROAD REMAINED FLOODED. RADAR SHOWED RAIN CONTINUING OVER THE AREA...SO THE FLASH FLOOD WARNING WILL REMAIN IN EFFECT UNTIL 330 PM PDT. LOCATIONS IMPACTED INCLUDE... KELBAKER ROAD AND KELSO. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON AREA ROADWAYS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. TO ESCAPE RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN! REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER HASHTAG... NWSVEGAS. && LAT...LON 3512 11570 3509 11554 3473 11558 3472 11571 $$ MORGAN
137 WGUS75 KVEF 312221 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 321 PM PDT TUE JUL 31 2012 CAC071-312230- /O.EXP.KVEF.FF.W.0071.000000T0000Z-120731T2230Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN BERNARDINO CA- 321 PM PDT TUE JUL 31 2012 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 330 PM PDT FOR CENTRAL SAN BERNARDINO COUNTY... AT 320 PM PDT...RADAR INDICATED ONLY LIGHT RAIN REMAINING OVER KELBAKER ROAD. AT 316 PM PDT...THE CALIFORNIA HIGHWAY PATROL REPORTED THAT WATER WAS RECEDING. THEREFORE...THE FLASH FLOOD WARNING WILL BE ALLOWED TO EXPIRE. LAT...LON 3512 11570 3509 11554 3473 11558 3472 11571 $$ 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, 1:30 PM PDT | Flash Flood Warning | VEF | San Bernardino | 49 min |
| 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.