Alert archive / Nevada / Flash Flood Warnings in 2012
Flash Flood Warning 225, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Oct 11, 2012, 10:42 PM PDT for Clark County, Nevada. It was in force for 94 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
- Oct 11, 2012, 10:42 PM PDT (05:42 UTC)
- Expired
- Oct 12, 2012, 12:16 AM PDT
- In force
- 94 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), 40 km from the middle of the area, began a volume at 05:42 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 00:00Z, 5.7 hours before the alert went out and 58 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.
636 WGUS55 KVEF 120542 FFWVEF NVC003-120745- /O.NEW.KVEF.FF.W.0225.121012T0542Z-121012T0745Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 1042 PM PDT THU OCT 11 2012 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A * FLASH FLOOD WARNING FOR... CENTRAL CLARK COUNTY IN SOUTHERN NEVADA... * UNTIL 1245 AM PDT. * AT 1036 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN FROM A THUNDERSTORM NEAR HENDERSON...MOVING NORTH AT 25 MPH. * LOCATIONS IMPACTED INCLUDE... THE SILVER BOWL...SAM BOYD STADIUM AND EAST LAS VEGAS. 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 3608 11511 3619 11501 3593 11493 3591 11509 $$ CZYZYK
2 follow-up statements
487 WGUS75 KVEF 120642 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 1142 PM PDT THU OCT 11 2012 NVC003-120745- /O.CON.KVEF.FF.W.0225.000000T0000Z-121012T0745Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CLARK NV- 1142 PM PDT THU OCT 11 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1245 AM PDT FOR CENTRAL CLARK COUNTY... AT 1136 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE HEAVY RAIN HAS MOVED TO THE NORTH AND OUT OF THE WARNED AREA. RUNOFF WILL LIKELY CONTINUE TO PRODUCE FLOODING THROUGH 1245 AM. RAINFALL RATES WITH THE EARLIER STORM WERE AS HIGH AS THREE INCHES PER HOUR. LOCATIONS IMPACTED INCLUDE...HENDERSON...SAM BOYD STADIUM...AND EAST LAS VEGAS. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED ON AREA ROADWAYS...AROUND UNDERPASSES... AND IN NORMALLY DRY WASHES AND LOW LYING AREAS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. NEVER TRY TO CROSS A FLOODED ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN! REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER HASHTAG... NWSVEGAS. && LAT...LON 3608 11511 3619 11501 3593 11493 3591 11509 $$ CZYZYK
336 WGUS75 KVEF 120716 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 1216 AM PDT FRI OCT 12 2012 NVC003-120725- /O.CAN.KVEF.FF.W.0225.000000T0000Z-121012T0745Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CLARK NV- 1216 AM PDT FRI OCT 12 2012 ...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR CENTRAL CLARK COUNTY... ALTHOUGH SHOWERS AND THUNDERSTORMS ARE STILL POSSIBLE THE REMAINDER OF THE NIGHT ACROSS THE LAS VEGAS VALLEY...HEAVY RAINFALL IS NOT BEING EXPERIENCED AT THIS TIME. THUS THE FLASH FLOOD WARNING HAS BEEN CANCELLED. MOTORISTS SHOULD CONTINUE TO USE EXTRA CAUTION TONIGHT AS PONDING OF WATER IN LOW LYING AREAS IS LIKELY TO STILL BE ENCOUNTERED...AND AREAS SUSCEPTIBLE TO FLOODING DURING PERIODS OF HEAVY RAIN ARE LIKELY STILL SEEING IMPACTS FROM THE EARLIER RAINFALL. LAT...LON 3608 11511 3619 11501 3593 11493 3591 11509 $$ KENNEDY
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, 6:45 PM PDT | Flash Flood Warning | VEF | Clark | 2 hr |
| 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 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.