Alert archive / Nevada / Flash Flood Warnings in 2012
Flash Flood Warning 114, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Aug 14, 2012, 3:42 PM PDT for Clark County, Nevada. It was in force for 61 min. 3 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 14, 2012, 3:42 PM PDT (22:42 UTC)
- Expired
- Aug 14, 2012, 4:43 PM PDT
- In force
- 61 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), 41 km from the middle of the area, began a volume at 22:43 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 14, 3:50 PM PDT | HEAVY RAIN 1.1 | 4 Ene Sloan, NV | HEADWORKS CHANNEL DETENTION BASIN MEASURED A STORM TOTAL OF 1.10 INCHES OF RAIN...MOST OF WHICH FELL IN ROUGHLY AN HOUR. |
| Aug 14, 3:58 PM PDT | FLASH FLOOD | 3 Sse Green Valley, NV | SEVERAL INCHES OF FLOWING WATER ALONG WITH NUMEROUS ROCKS AND AREAS OF MUD WERE ON ROADS NEAR THE INTERSECTION OF ARROYO GRANDE AND HORIZON RIDGE IN HENDERSON. |
| Aug 14, 4:30 PM PDT | HEAVY RAIN 0.5 | 2 E Green Valley, NV | 4 TO 6 INCHES OF STANDING WATER COVERED THE INTERSECTION OF WARM SPRINGS AND STEPHANIE. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Las Vegas, NV (KVEF), launched 12:00Z, 10.7 hours before the alert went out and 54 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
- 2752 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- -13 m²/s²
- 0-3 km storm-relative helicity
- 78 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
494
WGUS55 KVEF 142242
FFWVEF
NVC003-150045-
/O.NEW.KVEF.FF.W.0114.120814T2242Z-120815T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
342 PM PDT TUE AUG 14 2012
THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A
* FLASH FLOOD WARNING FOR...
CENTRAL CLARK COUNTY IN SOUTHERN NEVADA...
* UNTIL 545 PM PDT.
* AT 335 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
VERY HEAVY RAIN FROM THUNDERSTORMS FALLING OVER THE SOUTH END OF
THE LAS VEGAS VALLEY. OVER FOUR TENTHS OF AN INCH HAVE FALLEN AT
AN AUTOMATED RAIN GAUGE IN ANTHEM AND SEVERAL INCHES OF WATER WERE
RUNNING DOWN EASTERN AVENUE NEAR HORIZON RIDGE. THIS WILL RESULT
IN WATER COLLECTING IN LOW LYING AREAS OF EASTERN AVENUE AND
ADJACENT CROSS STREETS AS WELL AS IN OTHER PORTIONS IN THE SOUTH
END OF THE LAS VEGAS VALLEY.
* LOCATIONS IMPACTED INCLUDE...
HENDERSON...SOUTHERN HIGHLANDS...SEVEN HILLS...SILVERADO RANCH...
GREEN VALLEY...MCCARRAN INTERNATIONAL AIRPORT...EAST LAS VEGAS AND
SAM BOYD STADIUM.
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 3610 11526 3613 11495 3596 11499 3587 11511
3592 11526
$$
STACHELSKI2 follow-up statements
607
WGUS75 KVEF 142307
FFSVEF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
407 PM PDT TUE AUG 14 2012
NVC003-150045-
/O.CON.KVEF.FF.W.0114.000000T0000Z-120815T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CLARK NV-
407 PM PDT TUE AUG 14 2012
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 545 PM PDT FOR
CENTRAL CLARK COUNTY...
AT 343 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A THUNDERSTORM PRODUCING VERY HEAVY RAIN. THIS STORM WAS
LOCATED NEAR SEVEN HILLS...OR 7 MILES SOUTHWEST OF HENDERSON. THE
THUNDERSTORM WITH EXCESSIVE RAIN WAS NEARLY STATIONARY. FLASH
FLOODING WILL OCCUR IN LOW LYING AREAS OF THE SOUTH END OF THE LAS
VEGAS VALLEY. IN ADDITION...RUNOFF WILL CAUSE ROCKS AND MUD TO WASH
ONTO HILLY ROADS IN HENDERSON. ROCKS AND MUD WERE ALREADY REPORTED
WASHED ONTO HORIZON RIDGE AND ARROYO GRANDE IN HENDERSON. AN
AUTOMATED GAUGE IN ANTHEM HAS RECORDED 1.10 INCHES OF RAIN IN A
LITTLE OVER AN HOUR. AREAS SUCH AS ANTHEM...MCDONALD RANCH...AND
AREAS ALONG EASTERN AVENUE ESPECIALLY NEAR 215 ARE AMONG THOSE TO BE
CAREFUL IN.
LOCATIONS IMPACTED INCLUDE...
HENDERSON...SILVERADO RANCH...GREEN VALLEY...MCCARRAN INTERNATIONAL
AIRPORT...EAST LAS VEGAS AND SAM BOYD STADIUM.
LAT...LON 3610 11526 3613 11495 3596 11499 3587 11511
3592 11526
$$
STACHELSKI447
WGUS75 KVEF 142343
FFSVEF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
443 PM PDT TUE AUG 14 2012
NVC003-142350-
/O.CAN.KVEF.FF.W.0114.000000T0000Z-120815T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CLARK NV-
443 PM PDT TUE AUG 14 2012
...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR CENTRAL CLARK
COUNTY...
THE THUNDERSTORM THAT PRODUCE HEAVY RAIN OVER PARTS OF ANTHEM...GREEN
VALLEY AND HENDERSON HAS WEAKENED. A FEW INCHES OF STANDING WATER
MAY CONTINUE IN A FEW INTERSECTIONS. THE THREAT OF INTENSE RAINS AND
THAT WOULD LEAD TO FAST FLOWING WATER HAS PASSED. THE FLASH FLOOD
WARNING HAS BEEN CANCELLED.
LAT...LON 3610 11526 3613 11495 3596 11499 3587 11511
3592 11526
$$
PIERCENearby
Flash Flood Warnings in Nevada, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.