Alert archive / Nevada / Flash Flood Warnings in 2016
Flash Flood Warning 90, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Aug 18, 2016, 4:56 PM PDT for Clark County, Nevada. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 18, 2016, 4:56 PM PDT (23:56 UTC)
- Expired
- Aug 18, 2016, 8:00 PM PDT
- In force
- 3 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), 100 km from the middle of the area, began a volume at 23:57 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 12:00Z, 11.9 hours before the alert went out and 78 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
- 18 J/kg
- Mixed-layer CIN
- -295 J/kg
- Mixed-layer LCL
- 3236 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- 18 m²/s²
- 0-3 km storm-relative helicity
- 33 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
770 WGUS55 KVEF 182356 FFWVEF NVC003-190300- /O.NEW.KVEF.FF.W.0090.160818T2356Z-160819T0300Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 456 PM PDT THU AUG 18 2016 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A * FLASH FLOOD WARNING FOR... NORTHEASTERN CLARK COUNTY IN SOUTHERN NEVADA... * UNTIL 800 PM PDT * AT 455 PM PDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING HEAVY RAIN ACROSS THE WARNED AREA. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY. A RAIN GAUGE NEAR MOAPA HAS REPORTED NEARLY AN INCH OF RAIN IN ONE HOUR. * SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... MOAPA TOWN...OVERTON...MOAPA VALLEY... LOGANDALE AND SR 168 MILE MARKER 21. PRECAUTIONARY/PREPAREDNESS ACTIONS... TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD DEATHS OCCUR IN VEHICLES. IN HILLY TERRAIN THERE ARE HUNDREDS OF LOW WATER CROSSINGS WHICH ARE POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO CROSS FLOODED ROADS. FIND AN ALTERNATE ROUTE. && LAT...LON 3643 11494 3679 11496 3681 11437 3650 11432 $$ ASG
3 follow-up statements
919 WGUS55 KVEF 182358 CCA FFWVEF NVC003-190300- /O.COR.KVEF.FF.W.0090.160818T2356Z-160819T0300Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 458 PM PDT THU AUG 18 2016 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A * FLASH FLOOD WARNING FOR... NORTHEASTERN CLARK COUNTY IN SOUTHERN NEVADA... * UNTIL 800 PM PDT * AT 457 PM PDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING HEAVY RAIN ACROSS THE WARNED AREA. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY. A RAIN GAUGE NEAR MOAPA HAS REPORTED NEARLY AN INCH OF RAIN IN FIFTEEN MINUTES. * SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... MOAPA TOWN...OVERTON...MOAPA VALLEY... LOGANDALE AND SR 168 MILE MARKER 21. PRECAUTIONARY/PREPAREDNESS ACTIONS... IN HILLY TERRAIN THERE ARE HUNDREDS OF LOW WATER CROSSINGS WHICH ARE POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO CROSS FLOODED ROADS. FIND AN ALTERNATE ROUTE. && LAT...LON 3643 11494 3679 11496 3681 11437 3650 11432 $$ ASG
553 WGUS75 KVEF 190134 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 634 PM PDT THU AUG 18 2016 NVC003-190300- /O.CON.KVEF.FF.W.0090.000000T0000Z-160819T0300Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CLARK NV- 634 PM PDT THU AUG 18 2016 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 800 PM PDT FOR NORTHEASTERN CLARK COUNTY... AT 631 PM PDT...DOPPLER RADAR INDICATED RAIN HAS LIGHTENED UP ACROSS THE AREA, BUT ADDITIONAL THUNDERSTORMS WITH HEAVY RAIN ARE LIKELY TO MOVE INTO THE AREA. RAIN GAUGES IN THE AREA HAVE REPORTED NEARLY TWO INCHES OF RAIN IN THE PAST TWO HOURS. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... MOAPA TOWN...OVERTON...MOAPA VALLEY... LOGANDALE AND SR 168 MILE MARKER 21. PRECAUTIONARY/PREPAREDNESS ACTIONS... TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD DEATHS OCCUR IN VEHICLES. && LAT...LON 3643 11494 3679 11496 3681 11437 3650 11432 $$ ASG
862 WGUS75 KVEF 190254 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 754 PM PDT THU AUG 18 2016 NVC003-190304- /O.EXP.KVEF.FF.W.0090.000000T0000Z-160819T0300Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CLARK NV- 754 PM PDT THU AUG 18 2016 ...THE FLASH FLOOD WARNING FOR NORTHEASTERN CLARK COUNTY WILL EXPIRE AT 800 PM PDT... THE HEAVY RAIN HAS ENDED. FLOODING IS NO LONGER EXPECTED TO POSE A THREAT. PLEASE CONTINUE TO HEED ANY REMAINING ROAD CLOSURES. LAT...LON 3643 11494 3679 11496 3681 11437 3650 11432 $$ ASG
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 18, 2:30 PM PDT | Flash Flood Warning | VEF | Clark | 3 hr |
| Aug 18, 3:08 PM PDT | Severe Thunderstorm Warning | VEF | Clark | 37 min |
| Aug 18, 4:22 PM PDT | Severe Thunderstorm Warning | VEF | Clark | 38 min |
Nearby
Flash Flood Warnings in Nevada, 2016Every flash flood warning in 2016
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.