Alert archive / California / Flash Flood Warnings in 2011
Flash Flood Warning 90, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Sep 13, 2011, 9:09 AM PDT for San Bernardino County, California. It was in force for 111 min. 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 13, 2011, 9:09 AM PDT (16:09 UTC)
- Expired
- Sep 13, 2011, 11:00 AM PDT
- In force
- 111 min
- 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), 115 km from the middle of the area, began a volume at 16:12 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, 4.2 hours before the alert went out and 186 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
- 239 J/kg
- Mixed-layer CIN
- -98 J/kg
- Mixed-layer LCL
- 1707 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 75 m²/s²
- 0-3 km storm-relative helicity
- 136 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.3
The text
As transmitted, in the capitals the NWS used until 2016.
905
WGUS55 KVEF 131609
FFWVEF
CAC071-131800-
/O.NEW.KVEF.FF.W.0090.110913T1609Z-110913T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
909 AM PDT TUE SEP 13 2011
THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A
* FLASH FLOOD WARNING FOR...
EAST CENTRAL SAN BERNARDINO COUNTY IN SOUTHERN CALIFORNIA...
* UNTIL 1100 AM PDT.
* AT 903 AM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
VERY HEAVY RAIN FROM A THUNDERSTORM ALONG ROUTE 66 OR NATIONAL
TRAILS HIGHWAY BETWEEN AMBOY AND NORTH OF ESSEX TO JUST NORTH OF
INTERSTATE 40 IN EAST CENTRAL SAN BERNARDINO COUNTY.
* LOCATIONS IMPACTED INCLUDE...NATIONAL TRAILS HIGHWAY BETWEEN AMBOY
AND INTERSTATE.
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 3490 11512 3483 11505 3463 11531 3450 11548
3456 11558
$$
KENNEDY2 follow-up statements
021
WGUS75 KVEF 131742
FFSVEF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
1042 AM PDT TUE SEP 13 2011
CAC071-131800-
/O.CON.KVEF.FF.W.0090.000000T0000Z-110913T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN BERNARDINO CA-
1042 AM PDT TUE SEP 13 2011
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1100 AM PDT FOR EAST
CENTRAL SAN BERNARDINO COUNTY...
AT 1037 AM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A MODERATE RAIN FALLING OVER THE WARNED AREA WHERE RADAR
HAD ESTIMATED UP TO 4 INCHES INCHES OF RAINFALL HAD FALLEN EARLIER
THIS MORNING.
LOCATIONS IMPACTED INCLUDE... ROUTE 66 OR NATIONAL TRAILS HIGHWAY
BETWEEN AMBOY AND NORTH OF ESSEX TO JUST NORTH OF INTERSTATE 40 IN
EAST CENTRAL SAN BERNARDINO COUNTY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON
AREA ROADWAYS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. TO ESCAPE
RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED
ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN!
REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL
WEATHER SERVICE FACEBOOK PAGE OR TWITTER #NWSVEGAS.
&&
LAT...LON 3490 11512 3483 11505 3463 11531 3450 11548
3456 11558
$$
KENNEDY945
WGUS75 KVEF 131759
FFSVEF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
1059 AM PDT TUE SEP 13 2011
CAC071-131808-
/O.EXP.KVEF.FF.W.0090.000000T0000Z-110913T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN BERNARDINO CA-
1059 AM PDT TUE SEP 13 2011
...THE FLASH FLOOD WARNING WILL EXPIRE AT 1100 AM PDT FOR EAST
CENTRAL SAN BERNARDINO COUNTY...
RAINFALL RATES HAVE DECREASED SIGNIFICANTLY SINCE 1000 AM
PDT...ALONG WITH THE THREAT OF FLASH FLOODING ALONG HIGHWAY 66 IN
EASTERN SAN BERNARDINO COUNTY. THE FLASH FLOOD WARNING WILL BE
ALLOWED TO EXPIRE AT 1100 AM.
LAT...LON 3490 11512 3483 11505 3463 11531 3450 11548
3456 11558
$$
KENNEDYThe office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 13, 3:36 AM PDT | Flash Flood Watch | VEF | San Bernardino | 15 hr |
| Sep 13, 5:46 AM PDT | Areal Flood Advisory | VEF | San Bernardino | 119 min |
| Sep 13, 6:31 AM PDT | Flash Flood Warning | VEF | San Bernardino | 86 min |
| Sep 13, 8:01 AM PDT | Flash Flood Warning | VEF | San Bernardino | 119 min |
| Sep 13, 9:56 AM PDT | Flash Flood Warning | VEF | San Bernardino | 83 min |
| Sep 13, 10:22 AM PDT | Flash Flood Warning | VEF | San Bernardino | 113 min |
| Sep 13, 11:09 AM PDT | Flash Flood Warning | VEF | San Bernardino | 27 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.