Alert archive / Nevada / Flash Flood Warnings in 2023
Flash Flood Warning 21, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Jul 17, 2023, 3:25 PM PDT for Clark County, Nevada. It was in force for 2 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 17, 2023, 3:25 PM PDT (22:25 UTC)
- Expired
- Jul 17, 2023, 5:47 PM PDT
- In force
- 2 hr
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
County Clark County, NV
The radar
The Las Vegas radar (KESX), 24 km from the middle of the area, began a volume at 22:26 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, 10.4 hours before the alert went out and 71 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
- 28 J/kg
- Mixed-layer CIN
- -367 J/kg
- Mixed-layer LCL
- 4075 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 21 m²/s²
- 0-3 km storm-relative helicity
- 63 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
956
WGUS55 KVEF 172225
FFWVEF
NVC003-180130-
/O.NEW.KVEF.FF.W.0021.230717T2225Z-230718T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Las Vegas NV
325 PM PDT Mon Jul 17 2023
The National Weather Service in Las Vegas has issued a
* Flash Flood Warning for...
Central Clark County in southern Nevada...
* Until 630 PM PDT.
* At 325 PM PDT, Doppler radar indicated thunderstorms producing
heavy rain in the Black Mountain area. Between 1 and 2 inches of
rain have fallen. Flash flooding is ongoing or expected to begin
shortly.
HAZARD...Life-threatening flash flooding. Thunderstorms
producing flash flooding.
SOURCE...Radar.
IMPACT...Life-threatening flash flooding of low-water
crossings, creeks, normally dry washes and roads.
* Some locations that will experience flash flooding include...
Henderson, Boulder City and Black Mtn.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3586 11511 3602 11502 3596 11489 3579 11493
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
MW2 follow-up statements
422
WGUS75 KVEF 172338
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
438 PM PDT Mon Jul 17 2023
NVC003-180130-
/O.CON.KVEF.FF.W.0021.000000T0000Z-230718T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Clark NV-
438 PM PDT Mon Jul 17 2023
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 630 PM PDT THIS
EVENING FOR CENTRAL CLARK COUNTY...
At 438 PM PDT, Doppler radar indicated thunderstorms producing heavy
rain in the Black Mountain and Paradise Hills area. Between 0.75 and
1.5 inches of rain have fallen. Flash flooding is ongoing or
expected to begin shortly.
HAZARD...Life-threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar.
IMPACT...Life-threatening flash flooding of low-water crossings,
creeks, normally dry washes and roads.
Some locations that will experience flash flooding include...
Southern Henderson and Black Mtn.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3586 11511 3602 11502 3596 11489 3579 11493
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
MW173 WGUS75 KVEF 180047 FFSVEF Flash Flood Statement National Weather Service Las Vegas NV 547 PM PDT Mon Jul 17 2023 NVC003-180057- /O.CAN.KVEF.FF.W.0021.000000T0000Z-230718T0130Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Clark NV- 547 PM PDT Mon Jul 17 2023 ...FLASH FLOOD WARNING IS CANCELLED FOR AREAS AROUND BLACK MOUNTAIN... The heavy rain has ended from previous thunderstorms and flash flooding is no longer expected to pose a threat. Runoff may be continuing in some washes and dirt roads between Black Mountain and Highway 95, so please do not cross any flooded roadways if in that area. LAT...LON 3586 11511 3602 11502 3596 11489 3579 11493 $$ TB3
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 17, 2:36 PM PDT | Severe Thunderstorm Warning | VEF | Clark | 39 min |
| Jul 17, 3:11 PM PDT | Severe Thunderstorm Warning | VEF | Clark | 49 min |
| Jul 17, 3:52 PM PDT | Areal Flood Advisory | VEF | Clark | 111 min |
Nearby
Flash Flood Warnings in Nevada, 2023Every flash flood warning in 2023
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.