Alert archive / Nevada / Flash Flood Warnings in 2018
Flash Flood Warning 101, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Aug 9, 2018, 3:11 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 9, 2018, 3:11 PM PDT (22:11 UTC)
- Expired
- Aug 9, 2018, 6:15 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), 97 km from the middle of the area, began a volume at 22:14 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, 10.2 hours before the alert went out and 31 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
- 551 J/kg
- Mixed-layer CIN
- -340 J/kg
- Mixed-layer LCL
- 2902 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- -9 m²/s²
- 0-3 km storm-relative helicity
- 131 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted.
700
WGUS55 KVEF 092211
FFWVEF
NVC003-100115-
/O.NEW.KVEF.FF.W.0101.180809T2211Z-180810T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Las Vegas NV
311 PM PDT THU AUG 9 2018
The National Weather Service in Las Vegas has issued a
* Flash Flood Warning for...
Western Clark County in southern Nevada...
* Until 615 PM PDT.
* At 310 PM PDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Up to one inch of rain has
already fallen. Flash flooding is expected to begin shortly.
* Some locations that will experience flooding include...
Rainbow Canyon, Spring Mountains and Mary Jane Falls Campground.
This includes western portions of the Carpenter One burn scar.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3615 11590 3619 11590 3630 11575 3626 11561
3614 11567 3607 11578
$$
WOLF2 follow-up statements
012
WGUS75 KVEF 092332
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
432 PM PDT THU AUG 9 2018
NVC003-100115-
/O.CON.KVEF.FF.W.0101.000000T0000Z-180810T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Clark NV-
432 PM PDT THU AUG 9 2018
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 615 PM PDT FOR
WESTERN CLARK COUNTY...
At 431 PM PDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Flash flooding is expected to begin
shortly.
Excessive rainfall over the burn scar may result in debris flow
moving through the Carpenter One burn scar. The debris flow can
consist of rock, mud, vegetation and other loose materials.
Some locations that will experience flooding include...
Rainbow Canyon, Spring Mountains and Mary Jane Falls Campground.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3615 11590 3619 11590 3630 11575 3626 11561
3614 11567 3607 11578
$$
WOLF773
WGUS75 KVEF 100105
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
605 PM PDT THU AUG 9 2018
NVC003-100115-
/O.EXP.KVEF.FF.W.0101.000000T0000Z-180810T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Clark NV-
605 PM PDT THU AUG 9 2018
...THE FLASH FLOOD WARNING FOR WESTERN CLARK COUNTY WILL EXPIRE AT
615 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 3615 11590 3619 11590 3630 11575 3626 11561
3614 11567 3607 11578
$$
WolfThe office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 8, 5:20 PM PDT | Areal Flood Advisory | VEF | Clark | 3 hr |
| Aug 8, 5:29 PM PDT | Severe Thunderstorm Warning | VEF | Clark | 46 min |
Nearby
Flash Flood Warnings in Nevada, 2018Every flash flood warning in 2018
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.