Alert archive / Nevada / Flash Flood Warnings in 2012
Flash Flood Warning 215, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Oct 11, 2012, 4:53 PM PDT for Clark County, Nevada. It was in force for 112 min. 2 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
- Oct 11, 2012, 4:53 PM PDT (23:53 UTC)
- Expired
- Oct 11, 2012, 6:45 PM PDT
- In force
- 112 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), 69 km from the middle of the area, began a volume at 23:55 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, 5:24 PM PDT | FLASH FLOOD | 2 Ese Red Rock Canyon, NV | HIGHWAY 159 HAS SEVERAL INCHES OF WATER AND DEBRIS ON IT AT MILE MARKER 11. NDOT WAS BEING DISPATCHED TO HELP CLEAR THE ROAD. |
| Oct 11, 5:45 PM PDT | FLASH FLOOD | 3 Ese Spring Mountain R, NV | LAS VEGAS AREA BROADCAST MEDIA REPORTED A FOOT OF FLOWING WATER ALONG WITH SOME DEBRIS CROSSING ARROYO ROAD IN BLUE DIAMOND. THE EVENT TIME IS AN ESTIMATE. |
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, 11.9 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
- 327 J/kg
- Mixed-layer CIN
- -89 J/kg
- Mixed-layer LCL
- 958 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 146 m²/s²
- 0-3 km storm-relative helicity
- 316 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 3.9
The text
As transmitted, in the capitals the NWS used until 2016.
311 WGUS55 KVEF 112353 FFWVEF NVC003-120145- /O.NEW.KVEF.FF.W.0215.121011T2353Z-121012T0145Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 453 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 645 PM PDT. * AT 450 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN FROM A THUNDERSTORM NEAR SPRING MOUNTAIN RANCH...OR NEAR SPRING MOUNTAIN RANCH STATE PARK. THE STORM PRODUCING VERY HEAVY RAIN WAS NEARLY STATIONARY. LOW SPOTS ON HIGHWAY 159 AS WELL AS ON THE RED ROCK CANYON SCENIC LOOP AND IN SPRING MOUNTAIN RANCH STATE PARK WILL SEE SEVERAL INCHES OF WATER FLOW THROUGH THEM ALONG WITH ROCKS AND MUD. * LOCATIONS IMPACTED INCLUDE... RED ROCK CANYON...RED ROCK CANYON CAMPGROUND AND 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 $$ STACHELSKI
3 follow-up statements
945 WGUS75 KVEF 120030 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 530 PM PDT THU OCT 11 2012 NVC003-120145- /O.CON.KVEF.FF.W.0215.000000T0000Z-121012T0145Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CLARK NV- 530 PM PDT THU OCT 11 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 645 PM PDT FOR WEST CENTRAL CLARK COUNTY... AT 523 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE SHOWERS PRODUCING RAIN OVER RED ROCK CANYON. THIS COMBINED WITH ANY HEAVY RAIN THAT FELL EARLIER WILL RESULT IN RAPID FLOWS IN ANY WASHES AS WELL AS SEVERAL INCHES OF FLOWING WATER ACROSS LOW SPOTS ON ROADS ALONG WITH MUD AND ROCKS. LOW SPOTS ON THE RED ROCK CANYON SCENIC LOOP...SPRING MOUNTAIN RANCH STATE PARK AND HIGHWAY 159 NEAR RED ROCK CANYON ARE AMONG THE AREAS AT RISK FOR FLOODING. LOCATIONS IMPACTED INCLUDE... RED ROCK CANYON...RED ROCK CANYON CAMPGROUND AND ROCKY GAP CAMPGROUND...SPRING MOUNTAIN RANCH STATE PARK AND BLUE DIAMOND. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON AREA ROADWAYS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. TO ESCAPE RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN! REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER HASHTAG... NWSVEGAS. && LAT...LON 3619 11553 3618 11537 3600 11537 3603 11550 $$ STACHELSKI
975 WGUS75 KVEF 120044 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 544 PM PDT THU OCT 11 2012 NVC003-120145- /O.CON.KVEF.FF.W.0215.000000T0000Z-121012T0145Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CLARK NV- 544 PM PDT THU OCT 11 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 645 PM PDT FOR WEST CENTRAL CLARK COUNTY... AT 535 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE SHOWERS PRODUCING RAIN OVER RED ROCK CANYON. 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 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 $$ STACHELSKI
604 WGUS75 KVEF 120146 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 646 PM PDT THU OCT 11 2012 NVC003-120156- /O.EXP.KVEF.FF.W.0215.000000T0000Z-121012T0145Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CLARK NV- 646 PM PDT THU OCT 11 2012 ...THE FLASH FLOOD WARNING FOR WEST CENTRAL CLARK COUNTY HAS BEEN REPLACED WITH A NEW WARNING... SHOWERS CONTINUE TO DEVELOP OVER THE AREA FROM RED ROCK CANYON TO SPRING MOUNTAIN RANCH STATE PARK. THEREFORE THE FLASH FLOOD WARNING HAS BEEN EXTENDED FOR THIS AREA. LAT...LON 3619 11553 3618 11537 3600 11537 3603 11550 $$ STACHELSKI
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 11, 1:39 AM PDT | Areal Flood Advisory | VEF | Clark | 81 min |
| Oct 11, 8:22 AM PDT | Areal Flood Advisory | VEF | Clark | 7 hr |
| Oct 11, 8:39 AM PDT | Flash Flood Warning | VEF | Clark | 111 min |
| Oct 11, 11:48 AM PDT | Areal Flood Advisory | VEF | Clark | 2 hr |
| Oct 11, 1:51 PM PDT | Severe Thunderstorm Warning | VEF | Clark | 24 min |
| Oct 11, 2:53 PM PDT | Flash Flood Warning | VEF | Clark | 39 min |
| Oct 11, 4:18 PM PDT | Severe Thunderstorm Warning | VEF | Clark | 27 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.