Alert archive / Arizona / Flash Flood Warnings in 2026
Flash Flood Warning 32, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Aug 14, 2026, 3:09 PM MST for Mohave County, Arizona; Clark County, Nevada. It was in force for 7 hr. 2 reports 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
- Aug 14, 2026, 3:09 PM MST (22:09 UTC)
- Expired
- Aug 14, 2026, 10:15 PM MST
- In force
- 7 hr
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
Counties Mohave County, AZ, Clark County, NV
The radar
The Las Vegas radar (KESX), 22 km from the middle of the area, began a volume at 22:08 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 14, 4:00 PM MST | FLASH FLOOD | 12 S Railroad Pass, NV | Photo shows water flowing over Highway 165 near Nelson. |
| Aug 14, 5:03 PM MST | FLASH FLOOD | 16 S Boulder City, NV | NV DOT reports flooding blocking both lanes of State Route 165 resulting in the closure of the road. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
Did it verify
Verified. The Iowa Environmental Mesonet's Cow matched 2 storm reports to this flash flood warning; the first came 51 minutes after it went out.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Las Vegas, NV (KVEF), launched 12:00Z, 10.2 hours before the alert went out and 89 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
- 233 J/kg
- Mixed-layer CIN
- -123 J/kg
- Mixed-layer LCL
- 2555 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 1 m²/s²
- 0-3 km storm-relative helicity
- 52 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
870
WGUS55 KVEF 142209
FFWVEF
AZC015-NVC003-150115-
/O.NEW.KVEF.FF.W.0032.260814T2209Z-260815T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Las Vegas NV
309 PM PDT Fri Aug 14 2026
The National Weather Service in Las Vegas has issued a
* Flash Flood Warning for...
Western Mohave County in northwestern Arizona...
Central Clark County in southern Nevada...
* Until 615 PM PDT /615 PM MST/.
* At 309 PM PDT /309 PM MST/, Doppler radar indicated thunderstorms
producing heavy rain across the warned area. Up to 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 indicated.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
* Some locations that will experience flash flooding include...
Nelson, Hoover Dam and Willow Beach.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3604 11473 3605 11472 3589 11458 3570 11466
3560 11495 3577 11502
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
MW4 follow-up statements
767
WGUS75 KVEF 142349
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
449 PM PDT Fri Aug 14 2026
AZC015-NVC003-150115-
/O.CON.KVEF.FF.W.0032.000000T0000Z-260815T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mohave AZ-Clark NV-
449 PM PDT Fri Aug 14 2026 /449 PM MST Fri Aug 14 2026/
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 615 PM PDT /615 PM
MST/ THIS EVENING FOR WESTERN MOHAVE AND CENTRAL CLARK COUNTIES...
At 449 PM PDT /449 PM MST/, Doppler radar indicated thunderstorms
producing heavy rain across the warned area. Up to 3 inches of rain
have fallen. Flash flooding is ongoing or expected to begin shortly.
HAZARD...Life threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar indicated.
IMPACT...Life threatening flash flooding of creeks and streams, urban
areas, highways, streets and underpasses.
Some locations that will experience flash flooding include...
Nelson, Hoover Dam and Willow Beach.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3604 11473 3605 11472 3589 11458 3570 11466
3560 11495 3577 11502
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
MW104
WGUS55 KVEF 150036
FFWVEF
AZC015-NVC003-150315-
/O.EXT.KVEF.FF.W.0032.000000T0000Z-260815T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Las Vegas NV
536 PM PDT Fri Aug 14 2026
The National Weather Service in Las Vegas has extended the
* Flash Flood Warning for...
Western Mohave County in northwestern Arizona...
Central Clark County in southern Nevada...
* Until 815 PM PDT /815 PM MST/.
* At 536 PM PDT /536 PM MST/, Doppler radar indicated thunderstorms
producing heavy rain across the warned area. Up to 4 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 indicated.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
* Some locations that will experience flash flooding include...
Nelson, Hoover Dam and Willow Beach.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3604 11473 3605 11472 3589 11458 3570 11466
3560 11495 3577 11502
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
MW590
WGUS55 KVEF 150248
FFWVEF
AZC015-NVC003-150515-
/O.EXT.KVEF.FF.W.0032.000000T0000Z-260815T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Las Vegas NV
748 PM PDT Fri Aug 14 2026
The National Weather Service in Las Vegas has extended the
* Flash Flood Warning for...
Western Mohave County in northwestern Arizona...
Central Clark County in southern Nevada...
* Until 1015 PM PDT /1015 PM MST/.
* At 748 PM PDT /748 PM MST/, local law enforcement reported
thunderstorms producing heavy rain across the warned area. Up to 4
inches of rain have fallen. Flash flooding is ongoing or expected
to begin shortly.
HAZARD...Life threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Department of Transportation reported.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
* Some locations that will experience flash flooding include...
Nelson, Hoover Dam and Willow Beach.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3604 11473 3605 11472 3589 11458 3570 11466
3560 11495 3577 11502
FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
MW029
WGUS75 KVEF 150510
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
1010 PM PDT Fri Aug 14 2026
AZC015-NVC003-150520-
/O.EXP.KVEF.FF.W.0032.000000T0000Z-260815T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mohave AZ-Clark NV-
1010 PM PDT Fri Aug 14 2026 /1010 PM MST Fri Aug 14 2026/
...FLASH FLOOD WARNING WILL EXPIRE AT 1015 PM PDT /1015 PM MST/ THIS
EVENING FOR WESTERN MOHAVE AND CENTRAL CLARK COUNTIES...
The heaviest rain has ended. An Areal Flood Warning has been issued
until 345 AM due to lingering flooding as water runs off. Please
continue to heed remaining road closures.
&&
LAT...LON 3604 11473 3605 11472 3589 11458 3570 11466
3560 11495 3577 11502
$$
MWWhat forecasters said that day
The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Las Vegas, NV wrote its last area forecast discussion before this flash flood warning went out at Aug 14, 2:20 PM MST, 49 minutes earlier. Its key messages:
- * Thunderstorm chances will mainly persist through Saturday across Lincoln, Clark and Mohave counties through Saturday. FLash Flood Watches are in affect for Northern Mohave County and most of Lincoln County. * Mostly dry conditions are expected late this weekend and into the next work week. * The weekend starts off another steady warming trend.
Area forecast discussion, Aug 14, 2:20 PM MST, 49 minutes before
Area Forecast Discussion National Weather Service Las Vegas NV 220 PM PDT Fri Aug 14 2026 .KEY MESSAGES... * Thunderstorm chances will mainly persist through Saturday across Lincoln, Clark and Mohave counties through Saturday. FLash Flood Watches are in affect for Northern Mohave County and most of Lincoln County. * Mostly dry conditions are expected late this weekend and into the next work week. * The weekend starts off another steady warming trend. && .DISCUSSION...Another active day likely today across mainly across the eastern half of the forecast area, including Lincoln, Clark and Mohave counties where scattered thunderstorms are already occurring. Heavy rain and small hail are the greatest threat, but more organized and potentially severe storms are possible across northeast Clark and Lincoln Counties where we see the best shear and upper dynamics. With PWATs still over an inch, flash flooding will also remain a concern, especially since some of these storms will likely be training over the mountains. Some storms are possible into eastern San Bernardino County, but western portions of the county and Inyo County should should not see any storms as drier air has worked into the region. A Flash Flood Watch remains in place for Lincoln and northern Mohave counties until 8pm this evening. Drier air will begin to work into the region over the weekend, but moisture will still remain in place across Clark, Mohave, and Lincoln counties Saturday leading to another day of scattered showers and thunderstorms with isolated severe storms as shear numbers and upper dynamics look good across Clark and Mohave counties. The upper level pattern will shift into Friday night with a ridge of high pressure tilting into the region. This will inhibit storm chances by Sunday, with the exception of some slight chances for isolated storms on some of the higher peaks. The high pressure will continue to build into the work week, keeping the forecast dry. Longer term models hint at the high pressure beginning to push east by the next weekend, but that could be delayed further beyond the forecast period. The building high pressure will also kick off a warm trend over the weekend with temperatures slowly rising back into the 100s and 110s by the middle of the next work week. && .AVIATION...For Harry Reid...For the 18Z Forecast Package... Light E to SE winds continue over the next few hours, increasing in strength as afternoon mixing kicks in. Another round of convection is expected across southern Nevada, with convective initiation around the Valley as early as 19-20z expected. The best chance for direct impacts in the terminal area will be 20Z to 23Z, with the likely impacts being sudden gusty winds, heavy rainfall reducing visibility to under 5SM, and CIGs briefly decreasing to below 8kft AGL. Added a tempo group from 19-23z to account for convection in the vicinity and erratic wind speeds and directions. Hi-res guidance is hinting as a northeast wind push from dying convection around or after 00z, will watch how storms evolve today and update the forecast as needed, but for now have added NE winds beginning at 00z. Light and variable winds will return overnight. Away from areas of convection, VFR conditions will prevail with SCT to BKN clouds and bases remaining at or above 10kft AGL. Temperatures are expected to remain below 100F once again today and remain below 100F through the weekend. For the rest of southern Nevada, northwest Arizona and southeast California...For the 18Z Forecast Package...Thunderstorms are expected to redevelop this afternoon and evening across southern Nevada and northern Mohave County. Any storms could produce sudden gusty winds, lightning, heavy rain reducing visibilities to below 5SM, and CIGs decreasing to below 8kft AGL. Added a tempo group from 23z-03z at both KEED and KIFP to account for convection in the vicinity during that timeframe with erratic wind directions and speeds expected. Hi-res guidance is in agreement that northerly flow may set up within the Colorado River Valley tonight as storms die and send outflow boundaries from the north, so have kept that in the respective TAFs. Away from convective influences, south to southwest winds of 10 to 15 knots with gusts to around 20 knots will develop. Normal diurnal wind patterns expected further west at both KDAG and KBIH with cigs remaining mainly clear. Conditions will improve across the region overnight, with both convection and winds diminishing. && .SPOTTER INFORMATION STATEMENT...Spotters are encouraged to report any significant weather or impacts according to standard operating procedures. && DISCUSSION...Gorelow AVIATION...Moore For more forecast information...see us on our webpage: https://weather.gov/lasvegas or follow us on Facebook and Twitter
In the hours before
Local storm report, Aug 14, 2:11 PM MST, 58 minutes before
Preliminary Local Storm Report
National Weather Service Las Vegas NV
211 PM PDT Fri Aug 14 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0500 PM Tstm Wnd Dmg 2 S Meadview 35.97N 114.08W
08/09/2026 Mohave AZ Public
Photo shows roof damage from thunderstorm
winds in Meadview, AZ.
&&
MSLocal storm report, Aug 14, 2:12 PM MST, 57 minutes before
Preliminary Local Storm Report
National Weather Service Las Vegas NV
212 PM PDT Fri Aug 14 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1230 PM Tstm Wnd Dmg 7 E Mt. Charleston 36.27N 115.52W
08/12/2026 Clark NV County Official
Photo of flood control sensor shows damage
due to thunderstorm winds.
&&
MSLocal storm report, Aug 14, 2:14 PM MST, 55 minutes before
Preliminary Local Storm Report
National Weather Service Las Vegas NV
214 PM PDT Fri Aug 14 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0342 PM Flash Flood 1 WNW Amargosa Valley 36.65N 116.41W
08/13/2026 Nye NV Dept of Highways
Highway 95 is closed in both directions due
to flooding.
&&
MSThe office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 14, 6:46 AM MST | Severe Thunderstorm Warning | VEF | Mohave | 44 min |
| Aug 14, 10:18 AM MST | Flash Flood Warning | VEF | Mohave | 3 hr |
| Aug 14, 1:17 PM MST | Severe Thunderstorm Warning | VEF | Mohave | 43 min |
| Aug 14, 1:57 PM MST | Areal Flood Advisory | VEF | Mohave | 3 hr |
| Aug 14, 2:02 PM MST | Severe Thunderstorm Warning | VEF | Mohave | 43 min |
| Aug 14, 2:39 PM MST | Severe Thunderstorm Warning | VEF | Mohave | 51 min |
| Aug 14, 2:44 PM MST | Areal Flood Advisory | VEF | Mohave | 95 min |
| Aug 14, 3:36 PM MST | Severe Thunderstorm Warning | VEF | Mohave | 39 min |
| Aug 14, 4:00 PM MST | Flash Flood Warning | VEF | Mohave | 6 hr |
| Aug 14, 4:14 PM MST | Severe Thunderstorm Warning | VEF | Mohave | 46 min |
| Aug 14, 4:19 PM MST | Flash Flood Warning | VEF | Mohave | 5 hr |
| Aug 13, 5:14 PM MST | Areal Flood Advisory | VEF | Clark | 3 hr |
| Aug 14, 12:17 PM MST | Areal Flood Advisory | VEF | Lincoln | 3 hr |
| Aug 14, 12:23 PM MST | Severe Thunderstorm Warning | VEF | Clark, Lincoln | 52 min |
| Aug 14, 12:45 PM MST | Flash Flood Warning | VEF | Clark | 3 hr |
| Aug 14, 12:55 PM MST | Flash Flood Warning | VEF | Lincoln | 3 hr |
| Aug 14, 1:11 PM MST | Severe Thunderstorm Warning | VEF | Clark, Lincoln | 49 min |
| Aug 14, 1:52 PM MST | Areal Flood Advisory | VEF | Clark | 3 hr |
| Aug 14, 1:59 PM MST | Severe Thunderstorm Warning | VEF | Clark | 46 min |
| Aug 14, 3:29 PM MST | Areal Flood Warning | VEF | Lincoln | 3 hr |
| Aug 14, 3:50 PM MST | Severe Thunderstorm Warning | VEF | Clark | 40 min |
| Aug 14, 4:39 PM MST | Areal Flood Advisory | VEF | Clark, Lincoln | 3 hr |
Nearby
Flash Flood Warnings in Arizona, 2026Flash Flood Warnings in Nevada, 2026Every flash flood warning in 2026
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; radar from the NEXRAD Level II archive.