Alert archive / California / Flash Flood Warnings in 2017
Flash Flood Warning 21, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Jul 19, 2017, 9:57 AM PDT for San Bernardino County, California; 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 19, 2017, 9:57 AM PDT (16:57 UTC)
- Expired
- Jul 19, 2017, 1:00 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
The radar
The Las Vegas radar (KESX), 50 km from the middle of the area, began a volume at 16:59 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, 5.0 hours before the alert went out and 94 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
- 539 J/kg
- Mixed-layer CIN
- -200 J/kg
- Mixed-layer LCL
- 2329 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- -39 m²/s²
- 0-3 km storm-relative helicity
- 67 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
957
WGUS55 KVEF 191657
FFWVEF
CAC071-NVC003-192000-
/O.NEW.KVEF.FF.W.0021.170719T1657Z-170719T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Las Vegas NV
957 AM PDT WED JUL 19 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 100 PM PDT
* At 957 AM 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...
Cima, Mountain Pass, Nipton, Nipton Road Mile Marker 3 and Nipton
And Ivanpah Roads.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.
&&
LAT...LON 3561 11515 3541 11502 3518 11547 3545 11572
3573 11582 3579 11563 3553 11530
$$
Czyzyk2 follow-up statements
115
WGUS75 KVEF 191829
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
1129 AM PDT WED JUL 19 2017
CAC071-NVC003-192000-
/O.CON.KVEF.FF.W.0021.000000T0000Z-170719T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
San Bernardino CA-Clark NV-
1129 AM PDT WED JUL 19 2017
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 100 PM PDT FOR
NORTH CENTRAL SAN BERNARDINO AND SOUTHERN CLARK COUNTIES...
At 1127 AM PDT, Doppler radar indicated thunderstorms continuing to
produce heavy rain in the Mojave Preserve and Mountain Pass area.
Radar estimated that one to two inches had fallen so far, and the
additional heavy rain will keep flash flooding likely.
Some locations that will experience flooding include...
Cima, Mountain Pass, Nipton, Nipton Road Mile Marker 3 and Nipton And
Ivanpah Roads.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.
&&
LAT...LON 3561 11515 3541 11502 3518 11547 3545 11572
3573 11582 3579 11563 3553 11530
$$
Morgan167
WGUS75 KVEF 191952
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
1252 PM PDT WED JUL 19 2017
CAC071-NVC003-192000-
/O.EXP.KVEF.FF.W.0021.000000T0000Z-170719T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
San Bernardino CA-Clark NV-
1252 PM PDT WED JUL 19 2017
...THE FLASH FLOOD WARNING FOR NORTH CENTRAL SAN BERNARDINO AND
SOUTHERN CLARK COUNTIES WILL EXPIRE AT 100 PM PDT...
Only light rain was falling over far southwest Clark and far
northeast San Bernardino County. The heavy rain had ended, so the
warning will be allowed to expire. Please continue to heed any
remaining road closures and drive safely, as several crashes had
been reported on Interstate 15 near Mountain Pass.
LAT...LON 3561 11515 3541 11502 3518 11547 3545 11572
3573 11582 3579 11563 3553 11530
$$
MorganThe office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 18, 6:01 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| 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 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.