Alert archive / Nevada / Flash Flood Warnings in 2011
Flash Flood Warning 38, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Jul 7, 2011, 4:52 PM PDT for Clark County, Nevada. It was in force for 113 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
- Jul 7, 2011, 4:52 PM PDT (23:52 UTC)
- Expired
- Jul 7, 2011, 6:45 PM PDT
- In force
- 113 min
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
- Flood severity
- None
County Clark County, NV
The radar
The Las Vegas radar (KESX), 20 km from the middle of the area, began a volume at 23:54 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, 11.9 hours before the alert went out and 109 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.
109
WGUS55 KVEF 072352
FFWVEF
NVC003-080145-
/O.NEW.KVEF.FF.W.0038.110707T2352Z-110708T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
452 PM PDT THU JUL 7 2011
THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTH CENTRAL CLARK COUNTY IN SOUTHERN NEVADA...
* UNTIL 645 PM PDT.
* AT 450 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
VERY HEAVY RAIN FROM A THUNDERSTORM 7 MILES NORTH OF SEARCHLIGHT.
THE STORM PRODUCING VERY HEAVY RAIN WAS NEARLY STATIONARY. RADAR
ESTIMATES TWO TO THREE INCHES OF RAIN HAS FALLEN SINCE 4 PM IN THE AREA.
* LOCATIONS IMPACTED INCLUDE...SEARCHLIGHT...AND HIGHWAY 95 FROM MILE
MARKER 16 TO 34.
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 3563 11499 3565 11486 3542 11483 3539 11492
3543 11502
$$
JGG2 follow-up statements
900
WGUS75 KVEF 080023
FFSVEF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
523 PM PDT THU JUL 7 2011
NVC003-080145-
/O.CON.KVEF.FF.W.0038.000000T0000Z-110708T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CLARK NV-
523 PM PDT THU JUL 7 2011
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 645 PM PDT FOR SOUTH
CENTRAL CLARK COUNTY...
AT 522 PM PDT...RADAR CONTINUED TO INDICATE THUNDERSTORMS PRODUCING HEAVY
RAIN MOVING ACROSS THE SAME AREA JUST NORTH OF SEARCHLIGHT ALONG HIGHWAY 95.
ANOTHER AREA OF HEAVY RAIN HAS DEVELOPED JUST WEST OF SEARCHLIGHT ACROSS
HIGHWAY 164. RADAR ESTIMATES TWO TO THREE INCHES OF RAINFALL HAS FALLEN
SINCE ABOUT 330 PM IN THAT AREA.
LOCATIONS IMPACTED INCLUDE...SEARCHLIGHT....HIGHWAY 95 BETWEEN MILE MARKER
16 AND 34 AND HIGHWAY 164 FROM MILE MARKER 13 TO SEARCHLIGHT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS IS A DANGEROUS SITUATION. FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER
CROSSINGS AND ON AREA ROADWAYS. FLASH FLOODING IS NATURES NUMBER ONE KILLER.
TO ESCAPE RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED
ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN!
REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL
WEATHER SERVICE FACEBOOK PAGE OR TWITTER #NWSVEGAS.
&&
LAT...LON 3563 11499 3565 11486 3542 11483 3539 11492
3543 11502
$$
JGG779
WGUS75 KVEF 080144
FFSVEF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
644 PM PDT THU JUL 7 2011
NVC003-080154-
/O.EXP.KVEF.FF.W.0038.000000T0000Z-110708T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CLARK NV-
644 PM PDT THU JUL 7 2011
...THE FLASH FLOOD WARNING WILL EXPIRE AT 645 PM PDT FOR SOUTH
CENTRAL CLARK COUNTY...
THE WARNING HAS BEEN REPLACED BY A FLOOD ADVISORY EFFECTIVE UNTIL
830 PM.
LAT...LON 3563 11499 3565 11486 3542 11483 3539 11492
3543 11502
$$
JGGThe office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 6, 5:48 PM PDT | Areal Flood Advisory | VEF | Clark, Nye | 71 min |
| Jul 7, 1:01 PM PDT | Areal Flood Advisory | VEF | Clark | 43 min |
| Jul 7, 1:16 PM PDT | Flash Flood Warning | VEF | Clark | 119 min |
| Jul 7, 2:54 PM PDT | Severe Thunderstorm Warning | VEF | Clark | 51 min |
| Jul 7, 3:01 PM PDT | Severe Thunderstorm Warning | VEF | Clark | 33 min |
| Jul 7, 3:18 PM PDT | Severe Thunderstorm Warning | VEF | Clark | 42 min |
| Jul 7, 3:32 PM PDT | Severe Thunderstorm Warning | VEF | Clark | 43 min |
| Jul 7, 3:35 PM PDT | Flash Flood Warning | VEF | Clark | 114 min |
| Jul 7, 4:26 PM PDT | Areal Flood Advisory | VEF | Clark | 74 min |
| Jul 7, 4:29 PM PDT | Severe Thunderstorm Warning | VEF | Clark | 46 min |
| Jul 7, 4:37 PM PDT | Flash Flood Warning | VEF | Clark | 53 min |
Nearby
Flash Flood Warnings in Nevada, 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.