Alert archive / Arizona / Flash Flood Warnings in 2026
Flash Flood Warning 12, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Jul 18, 2026, 5:29 PM MST for Mohave County, Arizona. 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 18, 2026, 5:29 PM MST (00:29 UTC)
- Expired
- Jul 18, 2026, 8:30 PM MST
- In force
- 3 hr
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
County Mohave County, AZ
The radar
The Las Vegas radar (KESX), 135 km from the middle of the area, began a volume at 00:32 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.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this flash flood warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
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
Flgstf/Belemont, AZ (KFGZ), launched 00:00Z, 0.5 hours before the alert went out and 150 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
- 138 J/kg
- Mixed-layer CIN
- -43 J/kg
- Mixed-layer LCL
- 1075 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 51 m²/s²
- 0-3 km storm-relative helicity
- 65 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.6
The text
As transmitted.
778
WGUS55 KVEF 190029
FFWVEF
AZC015-190330-
/O.NEW.KVEF.FF.W.0012.260719T0029Z-260719T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Las Vegas NV
529 PM PDT Sat Jul 18 2026
The National Weather Service in Las Vegas has issued a
* Flash Flood Warning for...
Central Mohave County in northwestern Arizona...
* Until 830 PM MST.
* At 529 PM MST, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 0.5 and 0.75 inches of
rain have fallen. The expected rainfall rate is 1 to 2 inches in 1
hour. 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...
Peach Springs.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
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 3532 11333 3540 11364 3567 11351 3568 11333
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
EXPECTED RAINFALL RATE...1-2 INCHES IN 1 HOUR
$$
AG2 follow-up statements
876
WGUS75 KVEF 190123
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
623 PM PDT Sat Jul 18 2026
AZC015-190330-
/O.CON.KVEF.FF.W.0012.000000T0000Z-260719T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mohave AZ-
623 PM MST Sat Jul 18 2026
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 830 PM MST THIS
EVENING FOR CENTRAL MOHAVE COUNTY...
At 623 PM MST, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 0.5 and 1 inch of rain has
fallen. The expected rainfall rate is 1 to 2 inches in 1 hour. Flash
flooding is ongoing or expected to begin shortly.
HAZARD...Life threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar indicated.
IMPACT...Life threatening flash flooding of creeks and streams, urban
areas, highways, streets and underpasses.
Some locations that will experience flash flooding include...
Peach Springs.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.
&&
LAT...LON 3532 11333 3540 11364 3567 11351 3568 11333
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
EXPECTED RAINFALL RATE...1-2 INCHES IN 1 HOUR
$$
AG634 WGUS75 KVEF 190328 FFSVEF Flash Flood Statement National Weather Service Las Vegas NV 828 PM PDT Sat Jul 18 2026 AZC015-190338- /O.EXP.KVEF.FF.W.0012.000000T0000Z-260719T0330Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Mohave AZ- 828 PM MST Sat Jul 18 2026 ...FLASH FLOOD WARNING WILL EXPIRE AT 830 PM MST THIS EVENING FOR CENTRAL MOHAVE COUNTY... The heavy rain has ended. Flood waters have receded. Flooding is no longer expected to pose a threat. Please continue to heed remaining road closures. && LAT...LON 3532 11333 3540 11364 3567 11351 3568 11333 $$ AG
What 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 Jul 18, 4:30 PM MST, 59 minutes earlier. Its key messages:
- * Monsoonal moisture remains in place over the region through next week, maintaining daily thunderstorm chances. * Seasonably hot temperatures continue, though little relief will be felt overnight as moisture and cloud cover result in mild low temperatures.
Area forecast discussion, Jul 18, 4:30 PM MST, 59 minutes before
Area Forecast Discussion National Weather Service Las Vegas NV 430 PM PDT Sat Jul 18 2026 .KEY MESSAGES... * Monsoonal moisture remains in place over the region through next week, maintaining daily thunderstorm chances. * Seasonably hot temperatures continue, though little relief will be felt overnight as moisture and cloud cover result in mild low temperatures. && .DISCUSSION... Early this afternoon, isolated convection has already started forming over the higher terrain of southeastern Nevada and northwestern Arizona, with additional development expected through this afternoon and into this evening. Overall, coverage is expected to be less than what was observed on Friday afternoon and evening, through locally heavy rain and flooding remain concerns, especially for any locations that received appreciable rainfall previous days. Instability is expected to generally range from 500 to 1000 J/kg, maximized across southern Mohave County. However, 0 to 6 km shear remains weak, around 10 to 20 KT, which will result in slow storm motion and additional convective development away from the higher terrain largely dependent on outflow boundary interactions. Additionally, while DCAPE has decreased substantially over the last week due to the influx of monsoonal moisture, model soundings still indicate locations across Lincoln, Clark, and Mohave Counties with around 500 to 1000 J/kg of DCAPE, so gusty downburst winds also remain a threat with the stronger storms that develop. Convective activity will begin waning after sunset, though storms over southwestern Utah this evening could send outflow boundaries southwestward across northern Mohave, southern Lincoln, and into Clark County/the Las Vegas Valley tonight. A similar set-up is expected on Sunday, though showers may develop during late morning, with a westward expansion of thunderstorm chances during the afternoon and evening. Thunderstorms remain in the forecast each day through the upcoming week, especially across northern and eastern portions of the forecast area as precipitable water values remain 2 to 3 standard deviations above normal. Ensembles indicate a weak inverted trough/easterly wave that will translate westward midweek, potentially resulting in an uptick in thunderstorm activity Wednesday into Thursday. Thereafter, there is quite a bit more uncertainty in the evolution of the upper pattern as a trough takes shape off of the Pacific Northwest, which could, in turn, displace the ridge over the Four Corners Region, so stay tuned. In addition to daily thunderstorm chances, each day through next week will also remain hot and muggy. While afternoon high temperatures will be near seasonal normals, the abundant moisture and lingering overnight cloud cover due to afternoon and evening thunderstorms will maintain above normal low temperatures. Thus, little relief will be felt overnight, and we will continue to observe widespread Minor and Moderate (Level 1 and 2) Heat Risk each day. Those who will be outdoors will need to ensure they stay hydrated and take breaks in the air conditioning whenever possible. && .AVIATION...For Harry Reid...For the 00Z Forecast Package...Convection chances and coverage this afternoon and evening will be limited, with any thunderstorms remaining mainly over the higher terrain surrounding the valley. Some guidance continues to show the potential for a northeast push from storms over southwestern Utah around 04/05UTC. However, chances of this occurring are around 20%. Regardless of whether the northeast push occurs, typical diurnal southwesterly winds are expected overnight. Away from any convection that does develop over southern Nevada, VFR conditions will prevail with SCT to BKN clouds and bases remaining AOA 12kft AGL into Sunday. Convective coverage over southern Nevada is expected to increase on Sunday, with thunderstorms returning to the higher terrain surrounding the valley. For the rest of southern Nevada, northwest Arizona and southeast California...For the 00Z Forecast Package...Winds will generally remain light, 10 knots or less, and will favor a southerly to westerly direction through the rest of the afternoon. One exception is the northern Owens Valley, including KBIH, where breezy southeasterly winds will continue into the evening hours. The other exception will be the western Mojave Desert, including KDAG, where westerly winds will increase around sunset. Convective chances will be limited to the higher terrain in Clark, Lincoln, and Mohave counties for the rest of the afternoon and evening. An isolated storm also cannot be ruled out over the eastern Sierra slopes in northern Inyo County. Erratic gusty winds, low CIGS, heavy rain, and lightning are expected to accompany any storms that develop. Any convection that does develop will wane after sunset and light winds favoring typical overnight patterns should prevail tonight. Away from convection, VFR conditions will prevail with SCT clouds and bases remaining AOA 10kft AGL into Sunday. Convective coverage over southern Nevada and northwest Arizona is expected to increase on Sunday. && .SPOTTER INFORMATION STATEMENT...Spotters are encouraged to report any significant weather or impacts according to standard operating procedures. && DISCUSSION...Phillipson AVIATION...Stessman 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, Jul 18, 2:57 PM MST, 2 hours 32 minutes before
Preliminary Local Storm Report
National Weather Service Las Vegas NV
257 PM PDT Sat Jul 18 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0148 PM Flash Flood 3 N Hualapai Peak 35.11N 113.90W
07/18/2026 Mohave AZ Park/Forest Srvc
Video shows water flowing over the roadway
with rocks and debris covering the road.
&&
MSLocal storm report, Jul 18, 3:03 PM MST, 2 hours 26 minutes before
Preliminary Local Storm Report
National Weather Service Las Vegas NV
303 PM PDT Sat Jul 18 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0521 PM Flash Flood Kingman 35.18N 114.05W
07/17/2026 Mohave AZ Public
Video shows water flowing under the wash
that runs under Old Trails Road. Water is
backing up into 1st Ave.
&&
MSLocal storm report, Jul 18, 3:43 PM MST, 1 hour 46 minutes before
Preliminary Local Storm Report
National Weather Service Las Vegas NV
343 PM PDT Sat Jul 18 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0800 PM Flood 3 SSE Willow Valley 34.87N 114.58W
07/17/2026 Mohave AZ Public
Photo shows backyard inundated with standing
water.
&&
MSThe office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 18, 5:01 PM MST | Severe Thunderstorm Warning | VEF | Mohave | 44 min |
| Jul 18, 5:36 PM MST | Areal Flood Advisory | VEF | Mohave | 3 hr |
| Jul 18, 7:00 PM MST | Areal Flood Warning | VEF | Mohave | 13 min |
| Jul 18, 7:13 PM MST | Flash Flood Warning | VEF | Mohave | 3 hr |
| Jul 19, 1:18 PM MST | Areal Flood Advisory | VEF | Mohave | 3 hr |
Nearby
Flash Flood Warnings in Arizona, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.