Alert archive / Nevada / Flash Flood Warnings in 2020
Flash Flood Warning 21, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Aug 23, 2020, 3:46 PM PDT for Clark County, Nye County, Nevada. It was in force for 2 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 23, 2020, 3:46 PM PDT (22:46 UTC)
- Expired
- Aug 23, 2020, 6:00 PM PDT
- In force
- 2 hr
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
Counties Clark County, NV, Nye County, NV
The radar
The Las Vegas radar (KESX), 119 km from the middle of the area, began a volume at 22:47 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, 10.8 hours before the alert went out and 39 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
- 614 J/kg
- Mixed-layer CIN
- -231 J/kg
- Mixed-layer LCL
- 2780 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- -7 m²/s²
- 0-3 km storm-relative helicity
- 35 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
270
WGUS55 KVEF 232246
FFWVEF
NVC003-023-240100-
/O.NEW.KVEF.FF.W.0021.200823T2246Z-200824T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Las Vegas NV
346 PM PDT Sun Aug 23 2020
The National Weather Service in Las Vegas has issued a
* Flash Flood Warning for...
Southeastern Nye County in south central Nevada...
West Central Clark County in southern Nevada...
* Until 600 PM PDT.
* At 346 PM PDT, Doppler radar indicated thunderstorms developing
over Mercury, just east of Pahrump, and over the Spring Mountains,
moving slowly north. Flash flooding is expected to begin shortly.
HAZARD...Life threatening flash flooding. Thunderstorms
producing flash flooding.
SOURCE...Doppler radar.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, and streets.
* Some locations that will experience flash flooding include...
Pahrump, Rainbow Canyon, Mercury, Spring Mountains, Willow Creek
Campground, Mary Jane Falls Campground, Fletcher View Campground,
Kyle Canyon Campground and Lathrop Wells.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3612 11605 3650 11630 3675 11644 3678 11591
3627 11568 3631 11544 3597 11584 3610 11602
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
CM3 follow-up statements
097
WGUS75 KVEF 232326
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
426 PM PDT Sun Aug 23 2020
NVC003-023-240100-
/O.CON.KVEF.FF.W.0021.000000T0000Z-200824T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Clark NV-Nye NV-
426 PM PDT Sun Aug 23 2020
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 6 PM PDT THIS EVENING
FOR SOUTHEASTERN NYE AND WEST CENTRAL CLARK COUNTIES...
At 426 PM PDT, Doppler radar indicated thunderstorms located from
the southern end of the Nevada National Security Site to the west
side of the Spring Mountains, moving slowly west. Flash flooding is
ongoing or expected to begin shortly.
HAZARD...Life threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Doppler radar.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, and streets.
Some locations that will experience flash flooding include...
Pahrump, Rainbow Canyon, Mercury, Spring Mountains, Willow Creek
Campground, Mary Jane Falls Campground, Fletcher View Campground,
Kyle Canyon Campground and Lathrop Wells.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3612 11605 3650 11630 3675 11644 3678 11591
3627 11568 3631 11544 3597 11584 3610 11602
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
CM420
WGUS75 KVEF 240020
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
520 PM PDT Sun Aug 23 2020
NVC003-023-240100-
/O.CON.KVEF.FF.W.0021.000000T0000Z-200824T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Clark NV-Nye NV-
520 PM PDT Sun Aug 23 2020
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 6 PM PDT THIS EVENING
FOR SOUTHEASTERN NYE AND WEST CENTRAL CLARK COUNTIES...
At 520 PM PDT, Doppler radar indicated thunderstorms had dissipated
across the Spring Mountains, the Pahrump Valley and southern Nye
County. Doppler radar and automated sensors showed between 1 and 2
inches had fallen in parts of the warned area. Flash flooding is
likely ongoing.
HAZARD...Life threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Doppler radar.
IMPACT...Life threatening flash flooding of washes and canyons.
Some locations that will experience flash flooding include...
Mercury, Harris Springs Canyon, Kyle Canyon, Spring Mountains
foothills near Pahrump.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3612 11605 3650 11630 3675 11644 3678 11591
3627 11568 3631 11544 3597 11584 3610 11602
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
JA622
WGUS75 KVEF 240057
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
557 PM PDT Sun Aug 23 2020
NVC003-023-240107-
/O.EXP.KVEF.FF.W.0021.000000T0000Z-200824T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Clark NV-Nye NV-
557 PM PDT Sun Aug 23 2020
...FLASH FLOOD WARNING WILL EXPIRE AT 6 PM PDT THIS EVENING FOR
SOUTHEASTERN NYE AND WEST CENTRAL CLARK COUNTIES...
Flood waters have likely receded in the western Spring Mountains and
southern Nye County and flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
LAT...LON 3612 11605 3650 11630 3675 11644 3678 11591
3627 11568 3631 11544 3597 11584 3610 11602
3611 11603
$$
JAThe office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 23, 2:42 AM PDT | Excessive Heat Warning | VEF | Clark, Nye | 5 days |
| Aug 23, 12:23 PM PDT | Flash Flood Warning | VEF | Clark | 3 hr |
| Aug 23, 1:58 PM PDT | Flash Flood Warning | VEF | Clark | 3 hr |
| Aug 23, 3:11 PM PDT | Flash Flood Warning | VEF | Nye | 3 hr |
Nearby
Flash Flood Warnings in Nevada, 2020Every flash flood warning in 2020
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.