Alert archive / Nevada / Flash Flood Warnings in 2021
Flash Flood Warning 6, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Jul 11, 2021, 10:10 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
- Jul 11, 2021, 10:10 PM PDT (05:10 UTC)
- Expired
- Jul 12, 2021, 1:15 AM PDT
- In force
- 3 hr
- 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), 90 km from the middle of the area, began a volume at 05:11 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, 5.2 hours before the alert went out and 85 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
- 1152 J/kg
- Mixed-layer CIN
- -53 J/kg
- Mixed-layer LCL
- 3968 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- -7 m²/s²
- 0-3 km storm-relative helicity
- 53 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
057
WGUS55 KVEF 120510
FFWVEF
NVC003-120815-
/O.NEW.KVEF.FF.W.0006.210712T0510Z-210712T0815Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Las Vegas NV
1010 PM PDT Sun Jul 11 2021
The National Weather Service in Las Vegas has issued a
* Flash Flood Warning for...
Northeastern Clark County in southern Nevada...
* Until 115 AM PDT.
* At 1010 PM PDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. 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...
Overton, Moapa Town, Moapa Valley, Valley Of Fire, Echo Bay
Campground, Echo Bay, Overton Beach and Logandale.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3646 11479 3667 11467 3671 11446 3664 11431
3619 11440 3616 11472
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
JA2 follow-up statements
303
WGUS75 KVEF 120612
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
1112 PM PDT Sun Jul 11 2021
NVC003-120815-
/O.CON.KVEF.FF.W.0006.000000T0000Z-210712T0815Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Clark NV-
1112 PM PDT Sun Jul 11 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 115 AM PDT MONDAY FOR
NORTHEASTERN CLARK COUNTY...
At 1112 PM PDT, Doppler radar indicated thunderstorms were
dissipating over northeast Clark County. Flash flooding from earlier
heavy rain is already occurring on Valley of Fire Highway.
HAZARD...Life-threatening flash flooding.
SOURCE...Radar.
IMPACT...Life-threatening flash flooding of low-water crossings,
normally dry washes and roads.
Some locations that will experience flash flooding include...
Valley Of Fire and the North Shore Road of Lake Mead.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3646 11479 3667 11467 3671 11446 3664 11431
3619 11440 3616 11472
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
JA720
WGUS75 KVEF 120807
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
107 AM PDT Mon Jul 12 2021
NVC003-120817-
/O.EXP.KVEF.FF.W.0006.000000T0000Z-210712T0815Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Clark NV-
107 AM PDT Mon Jul 12 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 115 AM PDT EARLY THIS MORNING
FOR NORTHEASTERN CLARK COUNTY...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
LAT...LON 3646 11479 3667 11467 3671 11446 3664 11431
3619 11440 3616 11472
$$
COThe office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 12, 1:11 PM PDT | Flash Flood Watch | VEF | Clark | 40 hr |
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.