Alert archive / Arizona / Flash Flood Warnings in 2026

Flash Flood Warning 37, NWS Las Vegas, NV

August 30, 2026Mohave County, Arizona

NWS Las Vegas, NV issued this flash flood warning at Aug 30, 2026, 7:21 PM MST for Mohave County, Arizona. It was in force for 3 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 30, 2026, 7:21 PM MST (02:21 UTC)
Expired
Aug 30, 2026, 10:15 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), 126 km from the middle of the area, began a volume at 02:24 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

TimeReportWhereRemark
Aug 30, 7:38 PM MSTRAIN 1.897 Ne Desert Hills, AZRam Peak station on the Mohave County Flood Control District ALERT system. The period of the rain event was 43 minutes.
Aug 30, 7:44 PM MSTRAIN 1.426 Ne Desert Hills, AZCatsaurus station on the Mohave County Flood Control District ALERT System. The period of the rain event was 45 minutes.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

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, 2.4 hours before the alert went out and 230 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.

Skew-T log-pSkew-T log-p diagram, Flgstf/Belemont, AZ at 00:00Z on 2026-08-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1713 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Flgstf/Belemont, AZ at 00:00Z on 2026-08-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 62 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
1713 J/kg
Mixed-layer CIN
-4 J/kg
Mixed-layer LCL
1213 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
62 m²/s²
0-3 km storm-relative helicity
82 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.2

Open this sounding in Storm Lab

The text

As transmitted.

051 
WGUS55 KVEF 310221
FFWVEF
AZC015-310515-
/O.NEW.KVEF.FF.W.0037.260831T0221Z-260831T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Las Vegas NV
721 PM PDT Sun Aug 30 2026

The National Weather Service in Las Vegas has issued a

* Flash Flood Warning for...
  South Central Mohave County in northwestern Arizona...

* Until 1015 PM MST.

* At 721 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...
  Havasu Heights and Yucca.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

&&

LAT...LON 3463 11437 3454 11427 3478 11393 3487 11415
      3474 11433

FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

MW
2 follow-up statements
097 
WGUS75 KVEF 310311
FFSVEF

Flash Flood Statement
National Weather Service Las Vegas NV
811 PM PDT Sun Aug 30 2026

AZC015-310515-
/O.CON.KVEF.FF.W.0037.000000T0000Z-260831T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mohave AZ-
811 PM MST Sun Aug 30 2026

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1015 PM MST THIS
EVENING FOR SOUTH CENTRAL MOHAVE COUNTY...

At 811 PM MST, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Up to 2.5 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...
  Havasu Heights and Yucca.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

&&

LAT...LON 3463 11437 3454 11427 3478 11393 3487 11415
      3474 11433

FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

MW
725 
WGUS75 KVEF 310507
FFSVEF

Flash Flood Statement
National Weather Service Las Vegas NV
1007 PM PDT Sun Aug 30 2026

AZC015-310517-
/O.EXP.KVEF.FF.W.0037.000000T0000Z-260831T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mohave AZ-
1007 PM MST Sun Aug 30 2026

...FLASH FLOOD WARNING WILL EXPIRE AT 1015 PM MST THIS EVENING FOR
SOUTH CENTRAL MOHAVE COUNTY...

The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.

&&

LAT...LON 3474 11433 3487 11415 3478 11393 3454 11427
      3463 11437

$$

Meltzer

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 Aug 30, 3:58 PM MST, 3 hours 23 minutes earlier. Its key messages:

  • Generally cooler and drier conditions expected this week, though isolated-to-scattered thunderstorms are possible today and Monday in our eastern zones.
Area forecast discussion, Aug 30, 3:58 PM MST, 3 hours 23 minutes before
Area Forecast Discussion
National Weather Service Las Vegas NV
358 PM PDT Sun Aug 30 2026

.KEY MESSAGES...

- Generally cooler and drier conditions expected this week, though
isolated-to-scattered thunderstorms are possible today and Monday in
our eastern zones.

&&

.DISCUSSION...Today through Saturday.

The Four Corners area of high pressure that brought extreme
temperatures and isolated showers and thunderstorms to the region
last week has shifted eastward thanks to troughing over the western
United States. There remains 0.75 - 1.00 inches of PWAT over the
region, with greater values in our eastern zones including Mohave
County and eastern Lincoln County. As a result, with daytime
heating, there is a 20 percent chance of isolated showers and
thunderstorms over eastern Mohave County this afternoon, with
greater chances further east. Some high-resolution convective
allowing models continue to show a complex forming over La Pax and
Yavapai counties this evening, with a corresponding outflow boundary
pushing into the Mojave Desert. Should this come to fruition, the
outflow boundary will bring a moisture flux as well as 250-500 J/kg
of CAPE along with it, which will return chances of shower and
thunderstorm development over Mohave, eastern San Bernardino, and
eastern Clark counties tonight in addition to gusty winds. Monday
afternoon, chances of showers and thunderstorms return, as moisture
remains over the region and a shortwave pushes into the southern
Great Basin. Forecast HRRR soundings show over 2500 J/kg of CAPE
over Mohave County Monday afternoon, with SPC Excessive Rainfall
Outlook highlighting the county with a "Slight" and areas further
north with a "Moderate". Tuesday onward, moisture is scoured out of
the region thanks to dry southwest flow aloft. The aforementioned
troughing over the region will allow temperatures to drop below-
normal for early September with gusty southwesterly afternoons.
&&

.AVIATION...For Harry Reid...For the 00Z Forecast Package...Breezy
southwesterly winds will continue into the early evening, with
occasional gusts to 25 knots likely through sunset. South to
southwest winds will persist overnight, although the gustiness
should subside by late evening. Similar wind patterns are expected
Monday, except the southerly gusts may begin earlier around 16Z. VFR
conditions will prevail through Monday with any cloud bases
remaining 12kft AGL or higher. Convection through the remainder of
the afternoon will remain well east of the terminal area over
northwest Arizona. Greater convective coverage is expected Monday,
but once again the majority should remain east of the terminal area
and mainly affect approaches from the east. Temperatures should
remain below 100F through at least midweek.

For the rest of southern Nevada, northwest Arizona and southeast
California...For the 00Z Forecast Package...Outside of the western
Mojave Desert, where winds will favor a more westerly direction
through Monday, southerly to southwesterly winds will continue
across the region into this evening. Wind gusts of 20 to 30 knots
will be common through sunset, with lighter winds developing
thereafter. VFR conditions will persist through the TAF period with
FEW to SCT high clouds AOA 10kft AGL passing across the region. A
few isolated thunderstorms will continue over far eastern portions
of the region into this evening, but no convection is expected to
directly impact area terminals. An increase in convection is likely
Monday, but once again most of the activity will be over western
Arizona and not directly impact area terminals.
&&

.SPOTTER INFORMATION STATEMENT...Spotters are encouraged to report
any significant weather or impacts according to standard operating
procedures.

&&

DISCUSSION...Soulat
AVIATION...Planz

For more forecast information...see us on our webpage:
https://weather.gov/lasvegas or follow us on Facebook and Twitter

The office that day

Everything else NWS Las Vegas, NV issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 30, 6:47 PM MSTAreal Flood AdvisoryVEFMohave3 hr
Aug 30, 7:17 PM MSTSevere Thunderstorm WarningVEFMohave43 min
Aug 30, 8:39 PM MSTFlood WatchVEFMohave27 hr
Aug 31, 9:13 AM MSTSevere Thunderstorm WarningVEFMohave32 min
Aug 31, 9:50 AM MSTAreal Flood AdvisoryVEFMohave3 hr
Aug 31, 10:43 AM MSTSevere Thunderstorm WarningVEFMohave47 min
Aug 31, 11:26 AM MSTSevere Thunderstorm WarningVEFMohave49 min

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.