Alert archive / Nevada / Flash Flood Warnings in 2017
Flash Flood Warning 63, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Aug 2, 2017, 4:52 PM PDT for 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
- Aug 2, 2017, 4:52 PM PDT (23:52 UTC)
- Expired
- Aug 2, 2017, 7:45 PM PDT
- In force
- 3 hr
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
- Flood severity
- None
County Clark County, NV
The radar
The Las Vegas radar (KESX), 93 km from the middle of the area, began a volume at 23:55 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, 11.9 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
- 141 J/kg
- Mixed-layer CIN
- -329 J/kg
- Mixed-layer LCL
- 2525 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- -18 m²/s²
- 0-3 km storm-relative helicity
- 12 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted.
204 WGUS55 KVEF 022352 FFWVEF NVC003-030245- /O.NEW.KVEF.FF.W.0063.170802T2352Z-170803T0245Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED Flash Flood Warning National Weather Service Las Vegas NV 452 PM PDT WED AUG 2 2017 The National Weather Service in Las Vegas has issued a * Flash Flood Warning for... East central Clark County in southern Nevada... * Until 745 PM PDT * At 452 PM PDT, Doppler radar indicated thunderstorms producing heavy rain over Gold Butte National Monument. Flash flooding is expected to begin shortly. * Flash flooding will remain over mainly rural areas of east central Clark County. 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 3640 11407 3613 11410 3613 11430 3641 11431 $$ Morgan
2 follow-up statements
809 WGUS75 KVEF 030040 FFSVEF Flash Flood Statement National Weather Service Las Vegas NV 540 PM PDT WED AUG 2 2017 NVC003-030245- /O.CON.KVEF.FF.W.0063.000000T0000Z-170803T0245Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Clark NV- 540 PM PDT WED AUG 2 2017 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 745 PM PDT FOR EAST CENTRAL CLARK COUNTY... At 539 PM PDT, Doppler radar indicated that rain had diminished over Gold Butte National Monument. However, very heavy rain fell over the area, and water is likely still flowing down washes and canyons. Flash flooding will remain over mainly rural areas of east central Clark County. PRECAUTIONARY/PREPAREDNESS ACTIONS... In hilly terrain there are hundreds of low water crossings which are potentially dangerous in heavy rain. Do not attempt to cross flooded roads. Find an alternate route. && LAT...LON 3640 11407 3613 11410 3613 11430 3641 11431 $$ Morgan
154 WGUS75 KVEF 030137 FFSVEF Flash Flood Statement National Weather Service Las Vegas NV 637 PM PDT WED AUG 2 2017 NVC003-030146- /O.CAN.KVEF.FF.W.0063.000000T0000Z-170803T0245Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Clark NV- 637 PM PDT WED AUG 2 2017 ...THE FLASH FLOOD WARNING FOR EAST CENTRAL CLARK COUNTY IS CANCELLED... Heavy rain had ended over Gold Butte National Monument, and flooding is no longer expected to pose a threat. Please continue to heed any remaining road closures. LAT...LON 3640 11407 3613 11410 3613 11430 3641 11431 $$ Morgan
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 1, 6:09 PM PDT | Severe Thunderstorm Warning | VEF | Clark | 51 min |
| Aug 2, 2:44 PM PDT | Areal Flood Advisory | VEF | Clark, Nye | 2 hr |
Nearby
Flash 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.