Alert archive / California / Flash Flood Warnings in 2012
Flash Flood Warning 39, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Jul 15, 2012, 11:52 AM PDT for San Bernardino County, California. It was in force for 3 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
- Jul 15, 2012, 11:52 AM PDT (18:52 UTC)
- Expired
- Jul 15, 2012, 2:45 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), 84 km from the middle of the area, began a volume at 18:55 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.
The nearest sounding before it
Las Vegas, NV (KVEF), launched 12:00Z, 6.9 hours before the alert went out and 83 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
- 335 J/kg
- Mixed-layer CIN
- -212 J/kg
- Mixed-layer LCL
- 1353 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 22 m²/s²
- 0-3 km storm-relative helicity
- 8 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
053 WGUS55 KVEF 151852 FFWVEF CAC071-152145- /O.NEW.KVEF.FF.W.0039.120715T1852Z-120715T2145Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 1152 AM PDT SUN JUL 15 2012 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A * FLASH FLOOD WARNING FOR... NORTHEAST SAN BERNARDINO COUNTY IN SOUTHERN CALIFORNIA... * UNTIL 245 PM PDT. * AT 1145 AM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN FROM A THUNDERSTORM OVER NORTH CENTRAL SAN BERNARDINO COUNTY...OR 18 MILES WEST OF PRIMM. THE STORM PRODUCING VERY HEAVY RAIN WAS NEARLY STATIONARY. RADAR ESTIMATED IN EXCESS OF AN INCH OF RAIN HAD FALLEN FROM THIS THUNDERSTORM SO FAR. * LOCATIONS IMPACTED INCLUDE... KINGSTON MINE ROAD AND EXCELSIOR MINE ROAD. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED ON AREA ROADWAYS...AROUND UNDERPASSES... AND IN NORMALLY DRY WASHES AND LOW LYING AREAS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. 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 3578 11606 3579 11566 3553 11550 3547 11585 $$ STACHELSKI
2 follow-up statements
349 WGUS75 KVEF 152016 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 116 PM PDT SUN JUL 15 2012 CAC071-152145- /O.CON.KVEF.FF.W.0039.000000T0000Z-120715T2145Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN BERNARDINO CA- 116 PM PDT SUN JUL 15 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 245 PM PDT FOR NORTH CENTRAL SAN BERNARDINO COUNTY... AT 106 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A THUNDERSTORM PRODUCING VERY HEAVY RAIN ON THE EASTERN SIDE OF THE CLARK MOUNTAINS. THIS STORM WAS LOCATED OVER NORTH CENTRAL SAN BERNARDINO COUNTY...OR 21 MILES WEST OF PRIMM. THE THUNDERSTORM WITH EXCESSIVE RAIN WAS NEARLY STATIONARY. LOCATIONS IMPACTED INCLUDE... MAINLY RURAL AREAS OF NORTHERN SAN BERNARDINO COUNTY INCLUDING EXCELSIOR MINE ROAD. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON AREA ROADWAYS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. TO ESCAPE RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN! REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER HASHTAG... NWSVEGAS. && LAT...LON 3578 11606 3579 11566 3553 11550 3547 11585 $$ STACHELSKI
649 WGUS75 KVEF 152138 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 238 PM PDT SUN JUL 15 2012 CAC071-152146- /O.EXP.KVEF.FF.W.0039.000000T0000Z-120715T2145Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN BERNARDINO CA- 238 PM PDT SUN JUL 15 2012 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 245 PM PDT FOR NORTH CENTRAL SAN BERNARDINO COUNTY... THERE HAS NOT BEEN ANY SIGNIFICANT RAINFALL IN THE WARNING AREA FOR SOME TIME AND NO REPORTS OF FLOODING SO THE WARNING WILL EXPIRE. THERE IS STILL A CHANCE OF STORMS WITH HEAVY RAIN DEVELOPING THROUGH THIS EVENING AND A FLASH FLOOD WATCH REMAINS IN EFFECT. LAT...LON 3578 11606 3579 11566 3553 11550 3547 11585 $$ JH
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 14, 7:25 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Jul 14, 8:50 PM PDT | Areal Flood Advisory | VEF | San Bernardino | 27 min |
| Jul 14, 9:16 PM PDT | Flash Flood Warning | VEF | San Bernardino | 119 min |
| Jul 14, 11:35 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 40 min |
| Jul 15, 12:29 AM PDT | Flash Flood Warning | VEF | San Bernardino | 2 hr |
| Jul 15, 10:14 AM PDT | Flash Flood Watch | VEF | San Bernardino | 11 hr |
| Jul 15, 11:59 AM PDT | Flash Flood Warning | VEF | Inyo | 2 hr |
| Jul 15, 2:20 PM PDT | Areal Flood Advisory | VEF | San Bernardino | 115 min |
| Jul 15, 3:07 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 38 min |
| Jul 15, 4:52 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 38 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; radar from the NEXRAD Level II archive.