Alert archive / Arizona / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 7, NWS Las Vegas, NV

July 17, 2026Mohave County, Arizona; San Bernardino County, California

NWS Las Vegas, NV issued this severe thunderstorm warning at Jul 17, 2026, 5:57 PM MST for Mohave County, Arizona; San Bernardino County, California. It was in force for 48 min. 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 17, 2026, 5:57 PM MST (00:57 UTC)
Expired
Jul 17, 2026, 6:45 PM MST
In force
48 min
Issued by
NWS Las Vegas, NV
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Mohave County, AZ, San Bernardino County, CA

The radar

The Las Vegas radar (KESX), 116 km from the middle of the area, began a volume at 00:57 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 severe thunderstorm 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, 1.0 hours before the alert went out and 243 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 2026-07-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2026-07-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 38 square meters per square second.1939Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
978 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
38 m²/s²
0-3 km storm-relative helicity
66 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

127 
WUUS55 KVEF 180057
SVRVEF
AZC015-CAC071-180145-
/O.NEW.KVEF.SV.W.0007.260718T0057Z-260718T0145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Las Vegas NV
557 PM PDT Fri Jul 17 2026

The National Weather Service in Las Vegas has issued a

* Severe Thunderstorm Warning for...
  Southwestern Mohave County in northwestern Arizona...
  Eastern San Bernardino County in southern California...

* Until 645 PM PDT/645 PM MST/.

* At 556 PM PDT/556 PM MST/, a severe thunderstorm was located 9
  miles northwest of Yucca, moving southwest at 25 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs and trees.

* Locations impacted include...
  Bullhead City, Topock, Yucca, Mesquite Creek, Oatman, Mohave
  Valley, and Desert Hills.

This includes Interstate 40 in Arizona between mile markers 1 and 43.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3458 11442 3461 11443 3462 11444 3464 11444
      3466 11446 3467 11445 3471 11447 3473 11450
      3504 11460 3519 11418 3498 11392 3456 11440
TIME...MOT...LOC 0056Z 052DEG 22KT 3499 11423 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Stessman
2 follow-up statements
778 
WWUS55 KVEF 180108
SVSVEF

Severe Weather Statement
National Weather Service Las Vegas NV
608 PM PDT Fri Jul 17 2026

AZC015-CAC071-180145-
/O.CON.KVEF.SV.W.0007.000000T0000Z-260718T0145Z/
Mohave AZ-San Bernardino CA-
608 PM PDT Fri Jul 17 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM
PDT/645 PM MST/ FOR SOUTHWESTERN MOHAVE AND EASTERN SAN BERNARDINO
COUNTIES...

At 608 PM PDT/608 PM MST/, a severe thunderstorm was located 8 miles
southeast of Oatman, or 9 miles northwest of Yucca, moving southwest
at 15 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs and trees.

Locations impacted include...
Bullhead City, Topock, Yucca, Mesquite Creek, Oatman, Mohave Valley,
and Desert Hills.

This includes Interstate 40 in Arizona between mile markers 1 and 43.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3458 11442 3461 11443 3462 11444 3464 11444
      3466 11446 3467 11445 3471 11447 3473 11450
      3504 11460 3519 11418 3498 11392 3456 11440
TIME...MOT...LOC 0108Z 049DEG 14KT 3497 11425 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Stessman
637 
WWUS55 KVEF 180141
SVSVEF

Severe Weather Statement
National Weather Service Las Vegas NV
641 PM PDT Fri Jul 17 2026

AZC015-CAC071-180151-
/O.EXP.KVEF.SV.W.0007.000000T0000Z-260718T0145Z/
Mohave AZ-San Bernardino CA-
641 PM PDT Fri Jul 17 2026

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN MOHAVE AND
EASTERN SAN BERNARDINO COUNTIES WILL EXPIRE AT 645 PM PDT/645 PM
MST/...

The storm which prompted the warning has weakened, and no longer
poses an immediate threat to life or property. Therefore, the warning
will be allowed to expire.

&&

LAT...LON 3458 11442 3461 11443 3462 11444 3464 11444
      3466 11446 3467 11445 3471 11447 3473 11450
      3504 11460 3519 11418 3498 11392 3456 11440
TIME...MOT...LOC 0141Z 052DEG 22KT 3496 11426 

$$

Stessman

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 Jul 17, 4:24 PM MST, 1 hour 33 minutes earlier. Its key messages:

  • * Abundant moisture will remain over the Desert Southwest into next week, with daily rounds of monsoon thunderstorms. * Seasonably hot temperatures will persist with unusually warm overnight lows due to moisture and cloud cover.
Area forecast discussion, Jul 17, 4:24 PM MST, 1 hour 33 minutes before
Area Forecast Discussion
National Weather Service Las Vegas NV
424 PM PDT Fri Jul 17 2026

.KEY MESSAGES...

* Abundant moisture will remain over the Desert Southwest into
  next week, with daily rounds of monsoon thunderstorms.

* Seasonably hot temperatures will persist with unusually warm
  overnight lows due to moisture and cloud cover.

&&

.DISCUSSION...
An active stretch of monsoon days is expected as abundant
moisture resides over the Desert Southwest. This is apparent from
the most recent Upper Air soundings from Las Vegas, each showing
precipitable water values exceeding 1.6 inches. The most active
convective days currently appear to be today and Saturday. With
ensembles indicating some slight drying early next week, less
widespread activity can be expected, but the chance for storms
will persist through the end of next week. In fact, medium- range
ensembles indicate a weak inverted trough feature may result in a
period of greater shower and thunderstorm activity mid to late
next week, though confidence in the timing/placement of this
feature is very low. We will continue to monitor trends as the
time draws closer. Regardless, expect thunderstorms to largely be
terrain and outflow driven with little movement owing to very weak
mid-level steering flow. This will result in an increased risk
for localized flash flooding, especially given the high water
content in the atmosphere. Lightning and gusty winds will also
accompany any thunderstorm. Looking into the long range timeframe,
the pattern generally looks to continue favoring a monsoon
pattern with at least a chance for isolated thunderstorms into
next weekend. As it commonly the case, areas of Mohave and Lincoln
counties into southwestern Utah will generally be geographically
preferred for thunderstorms. Be especially mindful if you have any
outdoor activities planned over the next week or so as
thunderstorms will remain in the forecast.

Afternoon high temperatures will generally remain right around
climatological normals. However, given the potential for
increased overnight cloud cover and abundant atmospheric moisture,
the air will struggle to cool down overnight. This will result in
some elevated heat risk potential, especially in the hotter
spots, including the Colorado River Valley and Death Valley.
Remain hydrated and avoid being outdoors during the hottest time
of the afternoon.

&&

.AVIATION...For Harry Reid...For the 00Z Forecast Package...
Convection south of the Las Vegas Valley should result in winds
shifting southerly between 2330Z and 0030Z.  While isolated
convection cannot be ruled out before 03Z, the probability of
occurrence has diminished for the terminal area.  If convection does
move into the valley, heavy rainfall, brief gusty winds, and CIGs of
6kft to 8kft AGL will be the main concerns. Winds will become light
and variable overnight, and light east winds are expected Saturday
morning. The chance of convection tomorrow will be low in the
valley, with the best chances being to the east.

For the rest of southern Nevada, northwest Arizona and southeast
California...For the 00Z Forecast Package...Away from convection,
light south to southeast winds will continue through this evening.
Breezy southeast winds will continue at KBIH, with gusts over 20
knots persisting through sunset. KDAG should see gusty west winds
develop around 00Z. Scattered thunderstorms remain possible this
evening across southern Nevada and Arizona. Any storms may produce
lightning, sudden gusty outflow winds, brief heavy rain, and CIGs
below 8kft. Confidence in thunderstorm chances remains low near the
Colorado River Valley, including KEED and KIFP, but isolated
convection can not be ruled out through 06Z. Outside of
precipitation, CIGs should remain AOA 12kft AGL. Drier conditions
are expected tomorrow, with typical wind patterns.

&&

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

&&

DISCUSSION...Austin
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
Jul 17, 5:26 PM MSTAreal Flood AdvisoryVEFMohave3 hr
Jul 17, 6:18 PM MSTFlash Flood Warning Considerable damage threatVEFMohave3 hr
Jul 17, 6:25 PM MSTAreal Flood AdvisoryVEFMohave3 hr
Jul 17, 6:40 PM MSTFlash Flood Warning Considerable damage threatVEFMohave3 hr
Jul 17, 7:24 PM MSTSevere Thunderstorm WarningVEFMohave66 min
Jul 17, 9:37 PM MSTAreal Flood WarningVEFMohave3 hr
Jul 18, 12:40 PM MSTAreal Flood AdvisoryVEFMohave3 hr
Jul 18, 12:48 PM MSTFlash Flood Warning Considerable damage threatVEFMohave3 hr
Jul 18, 1:52 PM MSTAreal Flood AdvisoryVEFMohave3 hr
Jul 18, 4:36 PM MSTFlash Flood Warning Considerable damage threatVEFMohave3 hr
Jul 17, 5:13 PM MSTAreal Flood AdvisoryVEFSan Bernardino3 hr
Jul 17, 6:44 PM MSTFlash Flood Warning Considerable damage threatVEFSan Bernardino3 hr

Nearby

Severe Thunderstorm Warnings in Arizona, 2026Severe Thunderstorm Warnings in California, 2026Every severe thunderstorm 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.