Alert archive / California / Flash Flood Warnings in 2011
Flash Flood Warning 80, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Sep 9, 2011, 8:31 PM 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
- Sep 9, 2011, 8:31 PM PDT (03:31 UTC)
- Expired
- Sep 9, 2011, 11:30 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), 128 km from the middle of the area, began a volume at 03:33 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 00:00Z, 3.5 hours before the alert went out and 165 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 5440 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- 4 m²/s²
- 0-3 km storm-relative helicity
- 10 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
654 WGUS55 KVEF 100331 FFWVEF CAC071-100630- /O.NEW.KVEF.FF.W.0080.110910T0331Z-110910T0630Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 831 PM PDT FRI SEP 9 2011 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A * FLASH FLOOD WARNING FOR... CENTRAL SAN BERNARDINO COUNTY IN SOUTHERN CALIFORNIA... * UNTIL 1130 PM PDT. * AT 819 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN FROM A THUNDERSTORM OVER CENTRAL SAN BERNARDINO COUNTY...OR 22 MILES SOUTHWEST OF KELSO. THE STORM PRODUCING VERY HEAVY RAIN WAS NEARLY STATIONARY NEAR I-40 BETWEEN MILE MARKERS 60 AND 75. * LOCATIONS IMPACTED INCLUDE... RURAL AREAS NORTH OF I-40 IN CENTRAL SAN BERNARDINO COUNTY INCLUDING BUDWEISER WASH AND KELSO WASH WHICH FLOW UNDER THE UNION PACIFIC RAILROAD TRACKS. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED IN WASHES AND LOW WATER CROSSINGS NORTH OF I-40. TO ESCAPE RISING WATER...MOVE TO HIGHER GROUND. REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL WEATHER SERVICE FACEBOOK PAGE OR TWITTER #NWSVEGAS. && LAT...LON 3508 11608 3501 11584 3474 11572 3474 11598 $$ JA
3 follow-up statements
582 WGUS75 KVEF 100359 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 859 PM PDT FRI SEP 9 2011 CAC071-100630- /O.CON.KVEF.FF.W.0080.000000T0000Z-110910T0630Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN BERNARDINO CA- 859 PM PDT FRI SEP 9 2011 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1130 PM PDT FOR CENTRAL SAN BERNARDINO COUNTY... AT 855 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED HEAVY RAIN WAS DIMINISHING IN CENTRAL SAN BERNARDINO COUNTY OVER THE AREA NORTH OF I-40 AND ABOUT 16 MILES SOUTHWEST OF KELSO. HOWEVER... BETWEEN 2 AND 4 INCHES OF RAIN WAS ESTIMATED TO HAVE FALLEN OVER THE TERRAIN NORTH OF I-40 WHICH FLOWS NORTH INTO BUDWEISER WASH AND EVENTUALLY INTO KELSO WASH NEAR THE UNION PACIFIC RAILROAD TRACKS. LOCATIONS IMPACTED INCLUDE...RURAL AREAS NORTH OF I-40 IN CENTRAL SAN BERNARDINO COUNTY INCLUDING BUDWEISER WASH AND KELSO WASH AND POSSIBLY THE UNION PACIFIC RAILROAD TRACKS. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED IN WASHES AND LOW WATER CROSSINGS NORTH OF I-40. TO ESCAPE RISING WATER...MOVE TO HIGHER GROUND. REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL WEATHER SERVICE FACEBOOK PAGE OR TWITTER #NWSVEGAS. && LAT...LON 3508 11608 3501 11584 3474 11572 3474 11598 $$ JA
456 WGUS75 KVEF 100543 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 1043 PM PDT FRI SEP 9 2011 CAC071-100630- /O.CON.KVEF.FF.W.0080.000000T0000Z-110910T0630Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN BERNARDINO CA- 1043 PM PDT FRI SEP 9 2011 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1130 PM PDT FOR CENTRAL SAN BERNARDINO COUNTY... AT 1025 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A THUNDERSTORM PRODUCING MODERATE RAINFALL IN THE WARNING AREA. THIS STORM WAS LOCATED OVER CENTRAL SAN BERNARDINO COUNTY...OR 21 MILES SOUTHWEST OF KELSO...MOVING NORTH AT 5 MPH. HEAVY RAIN DIMINISHED AFTER 830 PM BUT WATER WILL STILL BE RUNNING IN BUDWEISER AND KELSO WASHES. LOCATIONS IMPACTED INCLUDE...RURAL AREAS NORTH OF I-40 IN CENTRAL SAN BERNARDINO COUNTY INCLUDING BUDWEISER WASH AND KELSO WASH AND POSSIBLY THE UNION PACIFIC RAILROAD TRACKS. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED IN WASHES AND LOW WATER CROSSINGS NORTH OF I-40. TO ESCAPE RISING WATER...MOVE TO HIGHER GROUND. REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL WEATHER SERVICE FACEBOOK PAGE OR TWITTER #NWSVEGAS. && LAT...LON 3508 11608 3501 11584 3474 11572 3474 11598 $$ JA
327 WGUS75 KVEF 100628 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 1128 PM PDT FRI SEP 9 2011 CAC071-100633- /O.EXP.KVEF.FF.W.0080.000000T0000Z-110910T0630Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN BERNARDINO CA- 1128 PM PDT FRI SEP 9 2011 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 1130 PM PDT FOR CENTRAL SAN BERNARDINO COUNTY... ONLY LIGHT RAIN SHOWERS REMAINED IN CENTRAL SAN BERNARDINO COUNTY OVER THE AREA NORTH OF I-40 BETWEEN LUDLOW AND KELSO. WATER IN THE WASHES FROM THE HEAVY RAINFALL EARLIER THIS EVENING WAS LIKELY RECEDING AND THE FLASH FLOOD WARNING WILL BE ALLOWED TO EXPIRE AT 1130 PM PDT. LAT...LON 3508 11608 3501 11584 3474 11572 3474 11598 $$ JA
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 10, 3:49 AM PDT | Areal Flood Advisory | VEF | San Bernardino | 116 min |
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; radar from the NEXRAD Level II archive.