Alert archive / Nevada / Flash Flood Warnings in 2012
Flash Flood Warning 34, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Jul 14, 2012, 8:56 PM PDT for Clark County, Nevada. It was in force for 109 min. 4 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
- Jul 14, 2012, 8:56 PM PDT (03:56 UTC)
- Expired
- Jul 14, 2012, 10:45 PM PDT
- In force
- 109 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), 77 km from the middle of the area, began a volume at 03:59 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 |
|---|---|---|---|
| Jul 14, 9:30 PM PDT | FLASH FLOOD | 1 Nne Centennial Hills, NV | SWIFT WATER RESCUE WAS REPORTED ON WEST DEER SPRINGS WAY BETWEEN 7601 AND 7809. |
| Jul 14, 10:00 PM PDT | FLASH FLOOD | 3 Nne Summerlin, NV | A SPOTTER REPORTED FLASH FLOODING ON EL CAPITAN BETWEEN GILMORE AND ALEXANDER THAT COVERED BOTH LANES. THE WATER ON GILMORE IS APPROXIMATE 4 INCHES DEEP AND THE WATER ON ALEXANDER IS APPROXIMATELY 8 INCHES DEEP. THREE AND HALF TO 5 INCH DIAMETER STONES COVERED |
| Jul 14, 10:00 PM PDT | FLASH FLOOD | 4 W North Las Vegas, NV | 3 TO 4 INCHES OF WATER COLLECTED ON DECATUR BOULEVARD NORTH ALONG WITH A SMALL AMOUNT OF MUD AND SMALL ROCKS JUST SOUTH OF THE INTERSECTION WITH 215 NORTH. AROUND 4 INCHES OF WATER ON DECATUR BOULEVARD NEAR THE INTESECTION OF WASHINGTON ROAD WAS STILL ON THE G |
| Jul 14, 10:05 PM PDT | FLASH FLOOD | 2 Nne Centennial Hills, NV | 3 FEET OF WATER ON BUFFALO DRIVE NEAR GRAND TEATON. |
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 00:00Z, 3.9 hours before the alert went out and 24 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
- 48 J/kg
- Mixed-layer CIN
- -202 J/kg
- Mixed-layer LCL
- 2462 m above ground
- 0-6 km bulk shear
- 2 kt
- 0-1 km storm-relative helicity
- -8 m²/s²
- 0-3 km storm-relative helicity
- -43 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
496 WGUS55 KVEF 150356 FFWVEF NVC003-150545- /O.NEW.KVEF.FF.W.0034.120715T0356Z-120715T0545Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 856 PM PDT SAT JUL 14 2012 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A * FLASH FLOOD WARNING FOR... THE FAR NORTHWEST LAS VEGAS VALLEY IN CENTRAL CLARK COUNTY IN SOUTHERN NEVADA... * UNTIL 1045 PM PDT. * AT 846 PM PDT...SPOTTERS AND RAIN GAGE AMOUNTS INDICATE VERY HEAVY RAIN IS FALLING FROM A THUNDERSTORM OVER THE FAR NORTHWEST VALLEY IN THE CENTENNIAL HILLS AREA. * LOCATIONS IMPACTED INCLUDE... MAINLY RURAL AREAS OF CENTRAL CLARK COUNTY. 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 3637 11537 3638 11516 3625 11517 3623 11535 $$ JS
2 follow-up statements
280 WGUS75 KVEF 150509 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 1009 PM PDT SAT JUL 14 2012 NVC003-150545- /O.CON.KVEF.FF.W.0034.000000T0000Z-120715T0545Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CLARK NV- 1009 PM PDT SAT JUL 14 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1045 PM PDT FOR THE CENTENNIAL AREA OF CENTRAL CLARK COUNTY... AT 955 PM PDT...THUNDERSTORMS HAVE DISSIPATED OVER THE NORTHWEST VALLEY BUT RUNOFF FROM THE EARLIER STORMS CONTINUES TO CREATE FLOODING ON AREA ROADWAYS AND HIGH WATER IN WASHES. MORE THAN AN INCH OF RAIN WAS REPORTED IN SOME LOCATIONS IN A 30 MINUTE TIME PERIOD. THE RANCHO DETENTION BASIN NEAR HIGHWAY 95 AND 215 REPORTED A WATER LEVEL OF GREATER THAN 7 FEET. LOCATIONS IMPACTED INCLUDE... MAINLY RURAL AREAS OF CENTRAL CLARK COUNTY. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED ON AREA ROADWAYS...AROUND UNDERPASSES... AND IN NORMALLY DRY WASHES AND LOW LYING AREAS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. NEVER TRY TO CROSS A FLOODED ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN! REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER HASHTAG... NWSVEGAS. && LAT...LON 3637 11537 3638 11516 3625 11517 3623 11535 $$ JS
739 WGUS75 KVEF 150541 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 1041 PM PDT SAT JUL 14 2012 NVC003-150548- /O.EXP.KVEF.FF.W.0034.000000T0000Z-120715T0545Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CLARK NV- 1041 PM PDT SAT JUL 14 2012 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 1045 PM PDT FOR THE NORTHWEST VALLEY IN CENTRAL CLARK COUNTY... THUNDERSTORMS HAVE DISSIPATED BUT WATER IS STILL BEING REPORTED ON ROADWAYS IN THE NORTHWEST VALLEY.FLASH FLOODING IS NO LONGER OCCURRING SO THE WARNING WILL BE ALLOWED TO EXPIRE ON TIME. MOTORISTS OUT AND ABOUT THIS EVENING SHOULD BE AWARE OF STANDING WATER ON AREA ROADS. LAT...LON 3637 11537 3638 11516 3625 11517 3623 11535 $$ JS
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 14, 6:02 PM PDT | Areal Flood Advisory | VEF | Clark | 116 min |
| Jul 14, 8:41 PM PDT | Areal Flood Advisory | VEF | Clark | 16 min |
| Jul 15, 10:14 AM PDT | Flash Flood Watch | VEF | Clark, Lincoln, Nye | 11 hr |
| Jul 15, 10:30 AM PDT | Flash Flood Warning | VEF | Lincoln | 4 hr |
| Jul 15, 1:12 PM PDT | Flash Flood Warning | VEF | Clark | 2 hr |
| Jul 15, 1:24 PM PDT | Flash Flood Warning | VEF | Nye | 4 hr |
| Jul 15, 1:58 PM PDT | Flash Flood Warning | VEF | Lincoln | 82 min |
| Jul 15, 2:16 PM PDT | Severe Thunderstorm Warning | VEF | Clark | 44 min |
| Jul 15, 2:41 PM PDT | Areal Flood Advisory | VEF | Clark | 3 hr |
| Jul 15, 3:01 PM PDT | Flash Flood Warning | VEF | Lincoln | 6 hr |
| Jul 15, 4:40 PM PDT | Flash Flood Warning | VEF | Clark | 65 min |
| Jul 15, 4:58 PM PDT | Flash Flood Warning | VEF | Clark | 92 min |
Nearby
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.