Alert archive / Nevada / Flash Flood Warnings in 2012
Flash Flood Warning 218, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Oct 11, 2012, 6:45 PM PDT for Clark County, Nevada. It was in force for 2 hr. 1 report 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
- Oct 11, 2012, 6:45 PM PDT (01:45 UTC)
- Expired
- Oct 11, 2012, 8:45 PM PDT
- In force
- 2 hr
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
- Flood severity
- None
County Clark County, NV
The radar
The Las Vegas radar (KESX), 69 km from the middle of the area, began a volume at 01:48 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 |
|---|---|---|---|
| Oct 11, 8:33 PM PDT | FLASH FLOOD | 2 Ese Red Rock Canyon, NV | STATE ROUTE 159 WAS CLOSED AT THE RED ROCK CANYON SCENIC LOOP DRIVE DUE TO DEBRIS ON THE ROAD FROM FLOODWATERS. |
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, 1.8 hours before the alert went out and 30 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
- 305 J/kg
- Mixed-layer CIN
- -43 J/kg
- Mixed-layer LCL
- 1141 m above ground
- 0-6 km bulk shear
- 64 kt
- 0-1 km storm-relative helicity
- 56 m²/s²
- 0-3 km storm-relative helicity
- 58 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.3
The text
As transmitted, in the capitals the NWS used until 2016.
184 WGUS55 KVEF 120145 FFWVEF NVC003-120345- /O.NEW.KVEF.FF.W.0218.121012T0145Z-121012T0345Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 645 PM PDT THU OCT 11 2012 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A * FLASH FLOOD WARNING FOR... WEST CENTRAL CLARK COUNTY IN SOUTHERN NEVADA... * UNTIL 845 PM PDT. * AT 640 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE SHOWERS PRODUCING RAIN FROM RED ROCK CANYON TO SPRING MOUNTAIN RANCH STATE PARK. THIS COMBINED WITH ANY HEAVY RAIN THAT FELL EARLIER WILL RESULT IN RAPID FLOWS IN ANY WASHES AS WELL AS SEVERAL INCHES OF FLOWING WATER ACROSS LOW SPOTS ON ROADS ALONG WITH MUD AND ROCKS. LOCAL LAW ENFORCEMENT OFFICIALS REPORTED FLASH FLOODING HAS TAKEN PLACE ON HIGHWAY 159 AT MILE MARKER 11 WHERE SEVERAL INCHES OF WATER WERE FLOWING ACROSS THE ROAD ALONG WITH DEBRIS. OTHER AREAS THAT COULD BE IMPACTED INCLUDE LOW SPOTS ELSEWHERE ALONG HIGHWAY 159 NEAR RED ROCK CANYON AS WELL AS ON THE RED ROCK CANYON SCENIC LOOP AND IN SPRING MOUNTAIN RANCH STATE PARK. * LOCATIONS IMPACTED INCLUDE... RED ROCK CANYON...RED ROCK CANYON CAMPGROUND...ROCKY GAP CAMPGROUND...SPRING MOUNTAIN RANCH STATE PARK AND BLUE DIAMOND. 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 BY USING THE TWITTER HASHTAG... NWSVEGAS. && LAT...LON 3619 11553 3618 11537 3600 11537 3603 11550 $$ STACHELSKI
2 follow-up statements
420 WGUS75 KVEF 120236 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 736 PM PDT THU OCT 11 2012 NVC003-120345- /O.CON.KVEF.FF.W.0218.000000T0000Z-121012T0345Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CLARK NV- 736 PM PDT THU OCT 11 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 845 PM PDT FOR WEST CENTRAL CLARK COUNTY... AT 725 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE SHOWERS PRODUCING RAIN FROM RED ROCK CANYON TO SPRING MOUNTAIN RANCH STATE PARK. THIS COMBINED WITH ANY HEAVY RAIN THAT FELL EARLIER WILL RESULT IN RAPID FLOWS IN ANY WASHES AS WELL AS SEVERAL INCHES OF FLOWING WATER ACROSS LOW SPOTS ON ROADS ALONG WITH MUD AND ROCKS. LOCAL LAW ENFORCEMENT OFFICIALS REPORTED FLASH FLOODING HAS TAKEN PLACE ON HIGHWAY 159 AT MILE MARKER 11 WHERE SEVERAL INCHES OF WATER WERE FLOWING ACROSS THE ROAD ALONG WITH DEBRIS. ARROYO ROAD IN BLUE DIAMOND HAD A FOOT OF WATER FLOWING ACROSS IT WITH DEBRIS ACCORDING TO LOCAL MEDIA REPORTS. OTHER AREAS THAT COULD BE IMPACTED INCLUDE LOW SPOTS ELSEWHERE ALONG HIGHWAY 159 NEAR RED ROCK CANYON AS WELL AS ON THE RED ROCK CANYON SCENIC LOOP AND IN SPRING MOUNTAIN RANCH STATE PARK. LOCATIONS IMPACTED INCLUDE... RED ROCK CANYON...RED ROCK CANYON CAMPGROUND...ROCKY GAP CAMPGROUND...SPRING MOUNTAIN RANCH AND BLUE DIAMOND. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON AREA ROADWAYS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. TO ESCAPE RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN! REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER HASHTAG... NWSVEGAS. && LAT...LON 3619 11553 3618 11537 3600 11537 3603 11550 $$ STACHELSKI
320 WGUS75 KVEF 120342 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 842 PM PDT THU OCT 11 2012 NVC003-120351- /O.EXP.KVEF.FF.W.0218.000000T0000Z-121012T0345Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CLARK NV- 842 PM PDT THU OCT 11 2012 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 845 PM PDT FOR WEST CENTRAL CLARK COUNTY... HEAVY RAIN PRODUCING THUNDERSTORMS HAVE MOVED OUT OF THE AREA OF CLARK COUNTY BETWEEN RED ROCK CANYON AND THE TOWN OF BLUE DIAMOND. THEREFORE THE FLASH FLOOD WARNING FOR THIS AREA WILL BE ALLOWED TO EXPIRE. LAT...LON 3619 11553 3618 11537 3600 11537 3603 11550 $$ STACHELSKI
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 11, 5:25 PM PDT | Severe Thunderstorm Warning | VEF | Clark, Nye | 35 min |
| Oct 11, 5:52 PM PDT | Severe Thunderstorm Warning | VEF | Nye | 53 min |
| Oct 11, 7:56 PM PDT | Flash Flood Warning | VEF | Clark | 80 min |
| Oct 11, 8:12 PM PDT | Severe Thunderstorm Warning | VEF | Clark | 48 min |
| Oct 11, 8:21 PM PDT | Flash Flood Warning | VEF | Clark | 114 min |
| Oct 11, 8:57 PM PDT | Severe Thunderstorm Warning | VEF | Clark | 48 min |
| Oct 11, 9:07 PM PDT | Flash Flood Warning | VEF | Clark | 113 min |
| Oct 11, 9:40 PM PDT | Severe Thunderstorm Warning | VEF | Clark | 27 min |
| Oct 11, 10:15 PM PDT | Flash Flood Warning | VEF | Clark | 2 hr |
| Oct 11, 10:42 PM PDT | Flash Flood Warning | VEF | Clark | 94 min |
| Oct 12, 12:03 AM PDT | Flash Flood Warning | VEF | Nye | 87 min |
| Oct 12, 12:28 AM PDT | Severe Thunderstorm Warning | VEF | Lincoln | 32 min |
| Oct 12, 1:43 PM PDT | Flash Flood Warning | VEF | Clark | 2 hr |
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.