Alert archive / Nevada / Flash Flood Warnings in 2017
Flash Flood Warning 89, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Aug 11, 2017, 3:51 PM PDT for Clark County, Nevada; San Bernardino County, California. 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 11, 2017, 3:51 PM PDT (22:51 UTC)
- Expired
- Aug 11, 2017, 6:45 PM PDT
- In force
- 3 hr
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
- Flood severity
- None
Counties San Bernardino County, CA, Clark County, NV
The radar
The Las Vegas radar (KESX), 40 km from the middle of the area, began a volume at 22:53 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, 10.9 hours before the alert went out and 109 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
- 285 J/kg
- Mixed-layer CIN
- -224 J/kg
- Mixed-layer LCL
- 2578 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- 10 m²/s²
- 0-3 km storm-relative helicity
- -38 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
015
WGUS55 KVEF 112251
FFWVEF
CAC071-NVC003-120145-
/O.NEW.KVEF.FF.W.0089.170811T2251Z-170812T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Las Vegas NV
351 PM PDT FRI AUG 11 2017
The National Weather Service in Las Vegas has issued a
* Flash Flood Warning for...
North central San Bernardino County in southern California...
Southern Clark County in southern Nevada...
* Until 645 PM PDT
* At 349 PM PDT, Doppler radar indicated thunderstorms producing
heavy rain near Nipton. Flash flooding is expected to begin
shortly. This will also affect portions of Highway 164 in Clark
County and Nipton Road in California.
* Some locations that will experience flooding include...
Nipton, Nipton And Ivanpah Roads and Nipton Road Mile Marker 3.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3557 11507 3532 11495 3516 11523 3534 11550
3566 11536
$$
ASG2 follow-up statements
074
WGUS75 KVEF 120039
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
539 PM PDT FRI AUG 11 2017
CAC071-NVC003-120145-
/O.CON.KVEF.FF.W.0089.000000T0000Z-170812T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
San Bernardino CA-Clark NV-
539 PM PDT FRI AUG 11 2017
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 645 PM PDT FOR
NORTH CENTRAL SAN BERNARDINO AND SOUTHERN CLARK COUNTIES...
At 538 PM PDT, Doppler radar indicated thunderstorms producing heavy
rain near Nipton. Flash flooding is likely to occur in this area. A
spotter in Nipton reported water over Nipton Road between Interstate
15 and Nipton.
Some locations that will experience flooding include...
Nipton, Nipton And Ivanpah Roads and Nipton Road Mile Marker 3.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3557 11507 3532 11495 3516 11523 3534 11550
3566 11536
$$
ASG286
WGUS75 KVEF 120141
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
641 PM PDT FRI AUG 11 2017
CAC071-NVC003-120150-
/O.EXP.KVEF.FF.W.0089.000000T0000Z-170812T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
San Bernardino CA-Clark NV-
641 PM PDT FRI AUG 11 2017
...THE FLASH FLOOD WARNING FOR NORTH CENTRAL SAN BERNARDINO AND
SOUTHERN CLARK COUNTIES WILL EXPIRE AT 645 PM PDT...
The heavy rain has ended. However, standing water is likely along
Nipton Road between Interstate 15 and Nipton. Please heed any
remaining road closures.
LAT...LON 3557 11507 3532 11495 3516 11523 3534 11550
3566 11536
$$
ASGThe office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 11, 12:47 PM PDT | Severe Thunderstorm Warning | VEF | Clark | 43 min |
| Aug 11, 3:00 PM PDT | Areal Flood Advisory | VEF | Clark | 3 hr |
| Aug 11, 3:10 PM PDT | Severe Thunderstorm Warning | VEF | Clark | 50 min |
| Aug 11, 4:32 PM PDT | Severe Thunderstorm Warning | VEF | Clark | 17 min |
| Aug 11, 1:56 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Aug 11, 2:42 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 48 min |
| Aug 11, 2:47 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
Nearby
Flash Flood Warnings in Nevada, 2017Flash Flood Warnings in California, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.