Alert archive / Nevada / Severe Thunderstorm Warnings in 2025

Severe Thunderstorm Warning 55, NWS Las Vegas, NV

September 5, 2025Clark County, Nevada

NWS Las Vegas, NV issued this severe thunderstorm warning at Sep 5, 2025, 8:57 PM PDT for Clark County, Nevada. It was in force for 63 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Sep 5, 2025, 8:57 PM PDT (03:57 UTC)
Expired: Sep 5, 2025, 10:00 PM PDT
In force: 63 min
Issued by: NWS Las Vegas, NV
Area: Storm-based polygon
Damage threat: Considerable
Hail: 1.75 in
Wind: 60.0 mph

County Clark County, NV

The radar

The Las Vegas radar (KESX), 58 km from the middle of the area, began a volume at 03:56 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 00:00Z, 4.0 hours before the alert went out and 50 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1126 J/kg
Mixed-layer CIN: -42 J/kg
Mixed-layer LCL: 2359 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 55 m²/s²
0-3 km storm-relative helicity: 109 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at Sep 5, 3:17 PM PDT, 5 hours 40 minutes earlier. Its key messages:

* Monsoon moisture will remain in place through Sunday, promoting scattered afternoon showers and thunderstorms each day. Activity will gradually shift eastward as drier air moves into the region early next week. * A drying trend is expected the first half of the week as flow becomes more westerly. Relatively cooler temperatures will also overspread the region by mid week.

Area forecast discussion, Sep 5, 3:17 PM PDT, 5 hours 40 minutes before

Area Forecast Discussion
National Weather Service Las Vegas NV
317 PM PDT Fri Sep 5 2025

.KEY MESSAGES...

* Monsoon moisture will remain in place through Sunday, promoting
  scattered afternoon showers and thunderstorms each day. Activity
  will gradually shift eastward as drier air moves into the
  region early next week.

* A drying trend is expected the first half of the week as flow
  becomes more westerly. Relatively cooler temperatures will also
  overspread the region by mid week.

&&

.DISCUSSION...
Anomalously high moisture remains across the Desert Southwest,
trapped beneath a flattening area of high pressure situated over
northern Mexico. This coupled with daytime heating and orographic
and mesoscale influences will continue to promote scattered
showers and thunderstorms through tonight. Areas of central and
southern Nevada, and adjacent western Arizona look to hold the
greatest potential for showers and storms. Hi-res ensembles have
recently struggled with convective evolution into the evening and
overnight hours, often underestimating the longevity and intensity
of showers and storms. Recent examples include Tuesday earlier
this week and last night, when large storm complexes developed and
lasted well past sunrise. The gradual invasion of drier air makes
for lesser confidence in something similar happening overnight,
but there remains at least a 10-20 percent chance of some kind of
convective complex developing across central/southern Nevada and
shifting south and east overnight. Regardless, any stronger storm
cells will be capable of producing rainfall rates of 3-4 inches
per hour, localized flooding and gusty winds. The focus for
Sunday's storms will shift eastward into mostly western Arizona
and Utah as upper flow becomes more westerly in nature. However,
an isolated terrain induced storm or two may occur further west.

Medium to long range ensembles display rather high confidence in
the development of a large upper trough off the California coast.
This will push remnant moisture east of the region, resulting in
drier conditions. With lower heights, we can also expect to see
temperatures around 5-10 degrees below seasonal normals. The drier
air will also bring more relief overnight with pleasant morning
conditions from midweek on.

&&

.AVIATION...For Harry Reid...For the 00Z Forecast
Package...Isolated showers and storms will linger into the early
evening hours before gradually diminishing. While confidence is
low on direct impacts to the terminal, any stronger nearby storm
could product gusty outflows and varying wind direction. For now
will maintain VCTS through 02z with improving conditions
thereafter. Light east/northeast winds to eventually shift
briefly southwest then turn more northwest to northeast overnight
into early Saturday.

For the rest of southern Nevada, northwest Arizona and southeast
California...For the 00Z Forecast Package...Isolated showers and
thunderstorms continue, with more widespread activity across
central and southern Nevada. Confidence remains low in any
specific terminal being impacted, but gusty outflow winds will be
likely with any nearby thunderstorm. Winds have generally remained
easterly to southeasterly and will eventually take on a more
diurnal trend overnight into early Saturday. Wind speeds will
generally remain 10-15 knots or less except in and around
thunderstorms, where winds may be gusty and erratic.

&&

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

&&

DISCUSSION/AVIATION...Austin

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, Sep 5, 4:52 PM PDT, 4 hours 5 minutes before

Preliminary Local Storm Report
National Weather Service Las Vegas NV
452 PM PDT Fri Sep 5 2025

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0415 PM     Flash Flood      5 NW Ivanpah            35.40N 115.36W
09/05/2025                   San Bernardino     CA   Park/Forest Srvc

            Social media video from Mojave National
            Preserve showed flash flooding on Ivanpah
            Road.

&&

MW

Local storm report, Sep 5, 7:49 PM PDT, 1 hour 8 minutes before

Preliminary Local Storm Report
National Weather Service Las Vegas NV
749 PM PDT Fri Sep 5 2025

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0130 AM     Flash Flood      1 S Overton             36.53N 114.44W
09/05/2025                   Clark              NV   Law Enforcement

            Moapa Valley Boulevard at Oatman Wash was
            closed due to flash flooding. All lanes
            blocked.

0130 AM     Flash Flood      2 SSW Moapa             36.65N 114.62W
09/05/2025                   Clark              NV   Dept of Highways

            NDOT reports Hidden Valley Road closed due
            to flash flooding. All lanes blocked.

0145 AM     Flash Flood      Valley of Fire State Pa 36.43N 114.52W
09/05/2025                   Clark              NV   Park/Forest Srvc

            Valley of Fire State Park reported flash
            flooding at White Domes Road. Also known as
            Mouses Tank Road. Road is closed due to
            significant flooding and debris.

0540 AM     Flash Flood      3 SW Oatman             34.99N 114.42W
09/05/2025                   Mohave             AZ   County Official

            Oatman Highway closed from Casa Grande Drive
            to Boundary Cone Road is closed due to flash
            flooding.

0555 AM     Flash Flood      2 ENE Kingman           35.20N 114.02W
09/05/2025                   Mohave             AZ   Trained Spotter

            Trained spotter reports roadway flooding.
            Road is impassable on Harrison and Pasadena,
            with debris and plants in the roadway.

0600 AM     Flash Flood      1 SSE Topock            34.75N 114.48W
09/05/2025                   Mohave             AZ   County Official

            Oatman Highway closed from Tule Drive to
            Interstate 40 due to flash flooding.

&&

Local storm report, Sep 5, 8:08 PM PDT, 49 minutes before

Preliminary Local Storm Report
National Weather Service Las Vegas NV
808 PM PDT Fri Sep 5 2025

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0500 PM     Flash Flood      6 NNE Caliente          37.69N 114.47W
09/05/2025                   Lincoln            NV   Public

            Carrigan Road near Highway 93 is
            experiencing very rapid flash flooding about
            3 feet deep.

0500 PM     Flash Flood      1 N Caliente            37.63N 114.51W
09/05/2025                   Lincoln            NV   Law Enforcement

            Lincoln County Sheriffs Office reported
            Highway 93 is closed between Caliente and
            Mile Marker 101 in both directions due to
            flash flooding.

&&

SOULAT

Local storm report, Sep 5, 8:11 PM PDT, 46 minutes before

Preliminary Local Storm Report
National Weather Service Las Vegas NV
811 PM PDT Fri Sep 5 2025

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0720 PM     Flash Flood      20 WNW Needles          34.92N 114.96W
09/04/2025                   San Bernardino     CA   Law Enforcement

            Corrects previous flash flood report from 20
            WNW Needles to 1920 occurrence time. Goffs
            Road was closed due to flooding from US 95
            to Interstate 40.

&&

SOULAT

Local storm report, Sep 5, 8:12 PM PDT, 45 minutes before

Preliminary Local Storm Report...Summary
National Weather Service Las Vegas NV
812 PM PDT Fri Sep 5 2025

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0600 AM     Flash Flood      1 SSE Topock            34.75N 114.48W
09/05/2025                   Mohave             AZ   County Official

            Oatman Highway closed from Tule Drive to
            Interstate 40 due to flash flooding.

0555 AM     Flash Flood      2 ENE Kingman           35.20N 114.02W
09/05/2025                   Mohave             AZ   Trained Spotter

            Trained spotter reports roadway flooding.
            Road is impassable on Harrison and Pasadena,
            with debris and plants in the roadway.

0540 AM     Flash Flood      3 SW Oatman             34.99N 114.42W
09/05/2025                   Mohave             AZ   County Official

            Oatman Highway closed from Casa Grande Drive
            to Boundary Cone Road is closed due to flash
            flooding.

0145 AM     Flash Flood      Valley of Fire State Pa 36.43N 114.52W
09/05/2025                   Clark              NV   Park/Forest Srvc

            Valley of Fire State Park reported flash
            flooding at White Domes Road. Also known as
            Mouses Tank Road. Road is closed due to
            significant flooding and debris.

0130 AM     Flash Flood      2 SSW Moapa             36.65N 114.62W
09/05/2025                   Clark              NV   Dept of Highways

            NDOT reports Hidden Valley Road closed due
            to flash flooding. All lanes blocked.

0130 AM     Flash Flood      1 S Overton             36.53N 114.44W
09/05/2025                   Clark              NV   Law Enforcement

            Moapa Valley Boulevard at Oatman Wash was
            closed due to flash flooding. All lanes
            blocked.

0720 PM     Flash Flood      20 WNW Needles          34.92N 114.96W
09/04/2025                   San Bernardino     CA   Law Enforcement

            Corrects previous flash flood report from 20
            WNW Needles to 1920 occurrence time. Goffs
            Road was closed due to flooding from US 95
            to Interstate 40.

0551 PM     Flash Flood      10 W Lone Pine          36.59N 118.23W
09/04/2025                   Inyo               CA   Law Enforcement

            California Highway Patrol reported multiple
            mud and rock slides on Whitney Portal Road
            at 551 PM.

&&

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 5, 7:33 PM PDT	Flash Flood Warning Considerable damage threat	VEF	Clark, Lincoln	4 hr
Sep 5, 10:09 PM PDT	Severe Thunderstorm Warning	VEF	Clark	66 min
Sep 5, 11:16 PM PDT	Flash Flood Warning Considerable damage threat	VEF	Clark	3 hr
Sep 5, 11:38 PM PDT	Severe Thunderstorm Warning	VEF	Clark	67 min
Sep 5, 11:51 PM PDT	Flash Flood Warning Considerable damage threat	VEF	Clark, Nye	4 hr
Sep 6, 12:35 AM PDT	Areal Flood Advisory	VEF	Clark	3 hr
Sep 6, 1:12 AM PDT	Flash Flood Warning Considerable damage threat	VEF	Clark	3 hr
Sep 6, 3:36 AM PDT	Areal Flood Warning	VEF	Clark, Nye	3 hr
Sep 6, 3:38 PM PDT	Severe Thunderstorm Warning	VEF	Clark	52 min
Sep 6, 1:30 AM PDT	Flash Flood Warning Considerable damage threat	VEF	Mohave	3 hr
Sep 6, 2:34 AM PDT	Flash Flood Warning Considerable damage threat	VEF	Mohave	3 hr
Sep 6, 4:06 AM PDT	Flash Flood Warning Considerable damage threat	VEF	Mohave	3 hr
Sep 6, 4:21 AM PDT	Areal Flood Warning	VEF	Mohave	3 hr

Nearby

Severe Thunderstorm Warnings in Nevada, 2025 Every severe thunderstorm warning in 2025

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.