Alert archive / Nevada / Flash Flood Warnings in 2021
Flash Flood Warning 96, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Aug 1, 2021, 11:37 AM PDT for Clark County, Nevada. It was in force for 114 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
- Aug 1, 2021, 11:37 AM PDT (18:37 UTC)
- Expired
- Aug 1, 2021, 1:31 PM PDT
- In force
- 114 min
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
County Clark County, NV
The radar
The Las Vegas radar (KESX), 78 km from the middle of the area, began a volume at 18:37 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, 6.6 hours before the alert went out and 18 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
- 680 J/kg
- Mixed-layer CIN
- -99 J/kg
- Mixed-layer LCL
- 1983 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- -1 m²/s²
- 0-3 km storm-relative helicity
- 27 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
625
WGUS55 KVEF 011837
FFWVEF
NVC003-012145-
/O.NEW.KVEF.FF.W.0096.210801T1837Z-210801T2145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Las Vegas NV
1137 AM PDT Sun Aug 1 2021
The National Weather Service in Las Vegas has issued a
* Flash Flood Warning for...
West Central Clark County in southern Nevada...
* Until 245 PM PDT.
* At 1137 AM PDT, Doppler radar indicated thunderstorms producing
heavy rain over the Spring Mountains and Red Rock Canyon. Flash
flooding is ongoing or expected to begin shortly.
HAZARD...Life-threatening flash flooding. Thunderstorms
producing flash flooding.
SOURCE...Radar.
IMPACT...Life-threatening flash flooding of low-water
crossings, creeks, normally dry washes and roads.
* Some locations that will experience flash flooding include...
Rainbow Canyon, Red Rock Canyon, Spring Mountains, Mt. Charleston,
Summerlin, Rocky Gap Campground, Lovell Canyon Campground, Kyle
Canyon Campground, Fletcher View Campground, Hilltop Campground,
Spring Mountain Ranch, Red Rock Canyon Campground and Mary Jane
Falls Campground.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Flooding is occurring or is imminent. It is important to know where
you are relative to streams, rivers, or creeks which can become
killers in heavy rains. Campers and hikers should avoid streams or
creeks.
&&
LAT...LON 3633 11537 3607 11536 3607 11551 3630 11575
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
JS1 follow-up statement
870 WGUS75 KVEF 012031 FFSVEF Flash Flood Statement National Weather Service Las Vegas NV 131 PM PDT Sun Aug 1 2021 NVC003-012041- /O.CAN.KVEF.FF.W.0096.000000T0000Z-210801T2145Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Clark NV- 131 PM PDT Sun Aug 1 2021 ...FLASH FLOOD WARNING IS CANCELLED FOR WEST CENTRAL CLARK COUNTY... Thunderstorms that produced heavy rain earlier today have ended and flooding is not expected to pose a threat at this time. Please continue to heed any road closures. LAT...LON 3633 11537 3607 11536 3607 11551 3630 11575 $$ JS
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 1, 9:33 AM PDT | Flash Flood Watch | VEF | Clark, Lincoln | 8 hr |
| Aug 1, 10:59 AM PDT | Severe Thunderstorm Warning | VEF | Clark | 46 min |
Nearby
Flash Flood Warnings in Nevada, 2021Every flash flood warning in 2021
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.