Alert archive / California / Flash Flood Warnings in 2011
Flash Flood Warning 35, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Jul 7, 2011, 3:45 PM PDT for San Bernardino County, California. It was in force for 2 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 7, 2011, 3:45 PM PDT (22:45 UTC)
- Expired
- Jul 7, 2011, 5:45 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 nearest sounding before it
Las Vegas, NV (KVEF), launched 12:00Z, 10.8 hours before the alert went out and 185 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
- 34 J/kg
- Mixed-layer CIN
- -208 J/kg
- Mixed-layer LCL
- 2113 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- -7 m²/s²
- 0-3 km storm-relative helicity
- 114 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
076 WGUS55 KVEF 072245 FFWVEF CAC071-080045- /O.NEW.KVEF.FF.W.0035.110707T2245Z-110708T0045Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 345 PM PDT THU JUL 7 2011 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A * FLASH FLOOD WARNING FOR... CENTRAL SAN BERNARDINO COUNTY IN SOUTHERN CALIFORNIA... * UNTIL 545 PM PDT. * AT 339 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN FROM A THUNDERSTORM NEAR LUDLOW. THE STORM PRODUCING VERY HEAVY RAIN WAS NEARLY STATIONARY. * LOCATIONS IMPACTED INCLUDE...LUDLOW. 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 TWITTER #NWSVEGAS. && LAT...LON 3491 11628 3492 11588 3458 11594 3459 11631 $$ JS
2 follow-up statements
113 WGUS75 KVEF 072323 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 423 PM PDT THU JUL 7 2011 CAC071-080045- /O.CON.KVEF.FF.W.0035.000000T0000Z-110708T0045Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN BERNARDINO CA- 423 PM PDT THU JUL 7 2011 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 545 PM PDT FOR CENTRAL SAN BERNARDINO COUNTY... AT 415 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE THUNDERSTORMS NEAR AND ALONG INTERSTATE 40 IN THE LUDLOW AREA. RUNOFF FROM THESE STORMS AND FROM EARLIER HEAVY RAIN WILL CONTINUE TO CAUSE FLASH FLOODING IN THE AREA. LOCATIONS IMPACTED INCLUDE...LUDLOW. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON AREA ROADWAYS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. TO ESCAPE RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN! REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL WEATHER SERVICE FACEBOOK PAGE OR TWITTER #NWSVEGAS. && LAT...LON 3491 11628 3492 11588 3458 11594 3459 11631 $$ JH
846 WGUS75 KVEF 080037 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 537 PM PDT THU JUL 7 2011 CAC071-080046- /O.EXP.KVEF.FF.W.0035.000000T0000Z-110708T0045Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN BERNARDINO CA- 537 PM PDT THU JUL 7 2011 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 545 PM PDT FOR CENTRAL SAN BERNARDINO COUNTY... NO SIGNIFICANT RAIN HAD FALLEN IN THE LUDLOW AREA FOR AWHILE AND ANY FLOODING WOULD HAVE SUBSIDED. NO REPORTS OF FLOODING WERE RECEIVED. LAT...LON 3491 11628 3492 11588 3458 11594 3459 11631 $$ JH
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 6, 5:04 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 41 min |
| Jul 6, 5:29 PM PDT | Areal Flood Advisory | VEF | Inyo, San Bernardino | 3 hr |
| Jul 7, 2:36 PM PDT | Areal Flood Advisory | VEF | San Bernardino | 3 hr |
| Jul 7, 3:25 PM PDT | Flash Flood Warning | VEF | San Bernardino | 2 hr |
| Jul 7, 3:49 PM PDT | Flash Flood Warning | VEF | Inyo | 3 hr |
Nearby
Flash Flood Warnings in California, 2011Every flash flood warning in 2011
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.