Alert archive / Nevada / Flash Flood Warnings in 2017
Flash Flood Warning 20, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Jul 19, 2017, 8:53 AM 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
- Jul 19, 2017, 8:53 AM PDT (15:53 UTC)
- Expired
- Jul 19, 2017, 11:45 AM 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), 27 km from the middle of the area, began a volume at 15:56 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, 3.9 hours before the alert went out and 72 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.
530
WGUS55 KVEF 191553
FFWVEF
CAC071-NVC003-191845-
/O.NEW.KVEF.FF.W.0020.170719T1553Z-170719T1845Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Las Vegas NV
853 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...
Central Clark County in southern Nevada...
* Until 1145 AM PDT
* At 851 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...
Interstate 15 from St. Rose to Primm, Henderson, Primm, Jean,
Enterprise, Paradise, Sloan, Seven Hills and Henderson Executive
Airport.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3600 11511 3591 11511 3590 11491 3565 11497
3561 11515 3553 11530 3569 11549 3596 11528
$$
Czyzyk2 follow-up statements
201
WGUS75 KVEF 191721
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
1021 AM PDT WED JUL 19 2017
CAC071-NVC003-191845-
/O.CON.KVEF.FF.W.0020.000000T0000Z-170719T1845Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
San Bernardino CA-Clark NV-
1021 AM PDT WED JUL 19 2017
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1145 AM PDT FOR
NORTH CENTRAL SAN BERNARDINO AND CENTRAL CLARK COUNTIES...
At 1018 AM PDT, Doppler radar indicated thunderstorms producing
heavy rain primarily along Interstate 15 from Jean to Primm. Runoff
and flooding from the earlier rain will continue through 1145 AM
PDT.
Some locations that will experience flooding include... Henderson,
Primm, Jean, Enterprise, Paradise, Sloan, Seven Hills and Henderson
Executive Airport.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3600 11511 3591 11511 3590 11491 3565 11497
3561 11515 3553 11530 3569 11549 3596 11528
$$
Czyzyk205
WGUS75 KVEF 191838
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
1138 AM PDT WED JUL 19 2017
CAC071-NVC003-191848-
/O.EXP.KVEF.FF.W.0020.000000T0000Z-170719T1845Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
San Bernardino CA-Clark NV-
1138 AM PDT WED JUL 19 2017
...THE FLASH FLOOD WARNING FOR NORTH CENTRAL SAN BERNARDINO AND
CENTRAL CLARK COUNTIES WILL EXPIRE AT 1145 AM PDT...
Only light rain was falling over southwest Clark County, so the
warning will be allowed to expire. Please continue to heed any
remaining road closures.
LAT...LON 3600 11511 3591 11511 3590 11491 3565 11497
3561 11515 3553 11530 3569 11549 3596 11528
$$
MorganThe office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 18, 5:14 PM PDT | Severe Thunderstorm Warning | VEF | Clark | 35 min |
| Jul 18, 6:01 PM PDT | Flash Flood Warning | VEF | Clark | 3 hr |
| 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 |
| Jul 19, 9:57 AM PDT | Flash Flood Warning | VEF | Clark | 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 |
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.