Alert archive / Nevada / Flash Flood Warnings in 2017
Flash Flood Warning 77, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Aug 4, 2017, 1:27 PM PDT for Clark County, Nevada. It was in force for 3 hr. 3 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 4, 2017, 1:27 PM PDT (20:27 UTC)
- Expired
- Aug 4, 2017, 4:30 PM PDT
- In force
- 3 hr
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
- Flood severity
- None
County Clark County, NV
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 4, 1:51 PM PDT | FLASH FLOOD | Mt. Charleston, NV | FLASH FLOODING AND DEBRIS FLOW ALONG HWY 157, THE FOREST SERVICE CAMPGROUND AND RAINBOW SUBDIVISION IS CURRENTLY OCCURING. |
| Aug 4, 3:32 PM PDT | FLASH FLOOD | 7 W Red Rock Canyon, NV | LOVELL CANYON ROAD CLOSED DUE TO DEBRIS AND FLASH FLOODING. |
| Aug 4, 4:33 PM PDT | FLASH FLOOD | 6 E Mt. Charleston, NV | HARRIS SPRINGS ROAD WASHED OUT FROM FLASH FLOODING. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Las Vegas, NV (KVEF), launched 12:00Z, 8.5 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
- 200 J/kg
- Mixed-layer CIN
- -59 J/kg
- Mixed-layer LCL
- 1855 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 15 m²/s²
- 0-3 km storm-relative helicity
- 15 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
520
WGUS55 KVEF 042027
FFWVEF
NVC003-042330-
/O.NEW.KVEF.FF.W.0077.170804T2027Z-170804T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Las Vegas NV
127 PM PDT FRI AUG 4 2017
The National Weather Service in Las Vegas has issued a
* Flash Flood Warning for...
Northwestern Clark County in southern Nevada...
* Until 430 PM PDT
* At 125 PM PDT, Doppler radar indicated thunderstorms producing
heavy rain across portions of the Spring Mountains including Mt.
Charleston. Flash flooding is expected to begin shortly.
* Some locations that will experience flooding include...
Rainbow Canyon, Spring Mountains, Mt. Charleston, Mahogany Grove
Campground, Mary Jane Falls Campground, Kyle Canyon Campground,
Dolomite Campground, Fletcher View Campground, Mcwilliams
Campground, Lovell Canyon Campground, Willow Creek Campground and
Hilltop Campground.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3632 11590 3644 11590 3648 11550 3623 11539
3606 11572
$$
ASG2 follow-up statements
758
WGUS75 KVEF 042131
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
231 PM PDT FRI AUG 4 2017
NVC003-042330-
/O.CON.KVEF.FF.W.0077.000000T0000Z-170804T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Clark NV-
231 PM PDT FRI AUG 4 2017
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 430 PM PDT FOR
NORTHWESTERN CLARK COUNTY...
At 228 PM PDT, Doppler radar and automated rain gauges indicated
thunderstorms producing heavy rain portions of the Spring Mountains
including Mt. Charleston. Rainbow Canyon and Harris Canyon automated
rain gauges have already received nearly 2 inches of rainfall today
and additional heavy rain will likely occur. Flash flooding is
likely.
Some locations that will experience flooding include...
Rainbow Canyon, Spring Mountains, Mt. Charleston, Mahogany Grove
Campground, Mary Jane Falls Campground, Kyle Canyon Campground,
Dolomite Campground, Fletcher View Campground, Mcwilliams Campground,
Lovell Canyon Campground, Willow Creek Campground and Hilltop
Campground.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3632 11590 3644 11590 3648 11550 3623 11539
3606 11572
$$
ASG408
WGUS75 KVEF 042326
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
426 PM PDT FRI AUG 4 2017
NVC003-042334-
/O.EXP.KVEF.FF.W.0077.000000T0000Z-170804T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Clark NV-
426 PM PDT FRI AUG 4 2017
...THE FLASH FLOOD WARNING FOR NORTHWESTERN CLARK COUNTY WILL EXPIRE
AT 430 PM PDT...
Heavy rain has ended over the Spring Mountains. Flash flooding is no
longer expected to pose a threat. However, runoff from earlier heavy
rains will likely impact the area through the remainder of the
afternoon. Please continue to heed any remaining road closures.
LAT...LON 3632 11590 3644 11590 3648 11550 3623 11539
3606 11572
$$
ASGThe office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 3, 7:34 PM PDT | Areal Flood Advisory | VEF | Clark | 3 hr |
| Aug 4, 1:17 PM PDT | Areal Flood Advisory | VEF | Clark | 3 hr |
| Aug 4, 2:01 PM PDT | Areal Flood Advisory | VEF | Nye | 3 hr |
| Aug 4, 4:46 PM PDT | Flash Flood Warning | VEF | Clark, Nye | 3 hr |
Nearby
Flash Flood Warnings in Nevada, 2017Every flash flood warning in 2017
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive.