Alert archive / California / Flash Flood Warnings in 2017
Flash Flood Warning 13, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Jul 18, 2017, 6:01 PM PDT for San Bernardino County, California; Clark County, Nevada. It was in force for 3 hr. 1 report 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
- Jul 18, 2017, 6:01 PM PDT (01:01 UTC)
- Expired
- Jul 18, 2017, 9:00 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
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 18, 7:00 PM PDT | FLASH FLOOD | 4 E Searchlight, NV | PARK SERVICE REPORTED COTTONWOOD COVE RD BECAME IMPASSIBLE DUE TO BEING INUNDATED AND UNDERCUT BY FLOOD WATERS. |
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 00:00Z, 1.0 hours before the alert went out and 123 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
- 332 J/kg
- Mixed-layer CIN
- -26 J/kg
- Mixed-layer LCL
- 3484 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- -12 m²/s²
- 0-3 km storm-relative helicity
- 45 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
389
WGUS55 KVEF 190101
FFWVEF
CAC071-NVC003-190400-
/O.NEW.KVEF.FF.W.0013.170719T0101Z-170719T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Las Vegas NV
601 PM PDT TUE JUL 18 2017
The National Weather Service in Las Vegas has issued a
* Flash Flood Warning for...
Northeastern San Bernardino County in southern California...
South central Clark County in southern Nevada...
* Until 900 PM PDT
* At 559 PM PDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Flash flooding is expected to
begin shortly.
* Some locations that will experience flooding include...
Searchlight, Cima, Nipton And Ivanpah Roads, Mid Hills Campground,
Nipton, Cottonwood Cove, Cottonwood Cove Campground, Nipton Road.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, country roads, farmland, and other low lying
spots.
&&
LAT...LON 3508 11553 3526 11553 3557 11537 3561 11469
3553 11466 3551 11468 3546 11467 3541 11463
3505 11476
$$
Czyzyk2 follow-up statements
048
WGUS75 KVEF 190228
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
728 PM PDT TUE JUL 18 2017
CAC071-NVC003-190400-
/O.CON.KVEF.FF.W.0013.000000T0000Z-170719T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
San Bernardino CA-Clark NV-
728 PM PDT TUE JUL 18 2017
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 900 PM PDT FOR
NORTHEASTERN SAN BERNARDINO AND SOUTH CENTRAL CLARK COUNTIES...
At 722 PM PDT, doppler radar indicated the heaviest rain has moved
to the west and out of southern Clark County and was located in
eastern San Bernardino County. A rain gauge southwest of Searchlight
received 0.91 inches of rain in under an hour. The threat of flash
flooding continues.
Some locations that will experience flooding include...
Searchlight, Cima, Nipton And Ivanpah Roads, Mid Hills Campground,
Nipton, Cottonwood Cove, Cottonwood Cove Campground, and Nipton
Road.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, country roads, farmland, and other low lying
spots.
&&
LAT...LON 3508 11553 3526 11553 3557 11537 3561 11469
3553 11466 3551 11468 3546 11467 3541 11463
3505 11476
$$
Czyzyk737
WGUS75 KVEF 190351
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
851 PM PDT TUE JUL 18 2017
CAC071-NVC003-190400-
/O.EXP.KVEF.FF.W.0013.000000T0000Z-170719T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
San Bernardino CA-Clark NV-
851 PM PDT TUE JUL 18 2017
...THE FLASH FLOOD WARNING FOR NORTHEASTERN SAN BERNARDINO AND SOUTH
CENTRAL CLARK COUNTIES WILL EXPIRE AT 900 PM PDT...
Thunderstorms have diminished and flood waters should have receded.
Flooding is no longer expected to pose a threat and therefore the
flash flood warning will be allowed to expire at 900 PM PDT. Please
continue to heed any remaining road closures.
LAT...LON 3508 11553 3526 11553 3557 11537 3561 11469
3553 11466 3551 11468 3546 11467 3541 11463
3505 11476
$$
CzyzykThe office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 18, 7:58 PM PDT | Areal Flood Advisory | VEF | San Bernardino | 3 hr |
| Jul 19, 7:53 AM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Jul 19, 8:53 AM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Jul 19, 9:57 AM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Jul 18, 5:14 PM PDT | Severe Thunderstorm Warning | VEF | Clark | 35 min |
| Jul 19, 5:30 AM PDT | Areal Flood Advisory | VEF | Clark | 3 hr |
| Jul 19, 6:23 AM PDT | Flash Flood Warning | VEF | Clark | 5 hr |
| Jul 19, 6:49 AM PDT | Flash Flood Warning | VEF | Clark | 3 hr |
| Jul 19, 8:32 AM PDT | Flash Flood Warning | VEF | Clark | 3 hr |
Nearby
Flash Flood Warnings in California, 2017Flash 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.