Alert archive / Arizona / Severe Thunderstorm Warnings in 2025

Severe Thunderstorm Warning 43, NWS Tucson, AZ

August 10, 2025Graham County, Greenlee County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Aug 10, 2025, 1:17 PM MST for Graham County, Greenlee County, Arizona. It was in force for 43 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: Aug 10, 2025, 1:17 PM MST (20:17 UTC)
Expired: Aug 10, 2025, 2:00 PM MST
In force: 43 min
Issued by: NWS Tucson, AZ
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Graham County, AZ, Greenlee County, AZ

The radar

The Tucson radar (KEMX), 165 km from the middle of the area, began a volume at 20:19 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 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 Tucson, AZ wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 10, 12:43 PM MST, 34 minutes earlier. Its key messages:

Daily thunderstorm chances each afternoon with daily variability in the location of impacts
Impacts possible with any strong thunderstorms include strong gusty winds, blowing dust, and localized heavy rain producing flash flooding
Warm temperatures will remain running 3-7 degrees above normal, resulting in widespread Moderate HeatRisk through at least Thursday

Area forecast discussion, Aug 10, 12:43 PM MST, 34 minutes before

Area Forecast Discussion
National Weather Service Tucson AZ
1243 PM MST Sun Aug 10 2025

.SYNOPSIS...Thunderstorm chances are forecast each afternoon and
evening through the coming week, though there will be day to day
variability in these chances. High temperatures will generally
remain above normal through the coming week.

&&

.KEY MESSAGES...
 - Daily thunderstorm chances each afternoon with daily variability
   in the location of impacts
 - Impacts possible with any strong thunderstorms include strong
   gusty winds, blowing dust, and localized heavy rain producing
   flash flooding
 - Warm temperatures will remain running 3-7 degrees above normal,
   resulting in widespread Moderate HeatRisk through at least
   Thursday

&&

.DISCUSSION...
The 18Z sounding shows a fairly weak cap (-43 CIN), weak mean
winds (2-5 knots), decent PWAT 1.38", MUCAPE of 1488 J/kg, and
marginal at best DCAPE of 1015 J/kg. Latest satellite trends
indicate increasing mid-level cloud cover across eastern Pima
County and a weakening remnant MCV over northern Sonora. With
latest information, slightly less concerned for severe level winds
today, though the chances (10-30%) still exist for a strong
thunderstorm to produce near severe level (58+ mph) winds today
mainly in the Arivaca-Nogales area. There is still a concern for
flooding impacts with any storms that form and produce 1-2" precip
rates since they will be slow moving.

As the long-wave trough currently stretched across much of the
Central Plains continues to shift east, the ridge currently
centered across CA will broaden and shift back over to the
southwest. This will allow upper-level flow to shift from the
north-northwest to more of the northeast through the middle of the
week. During this upper-level change, decent moisture (PW
1.0-1.5") will remain, continuing to keep daily shower and
thunderstorm chances in the forecast through the next 7 days.
Typical with monsoon activity, daily variability in location of
the impacts are expected.

Temperatures will remain above seasonal normals by 3-6 degrees
through the work week resulting in widespread Moderate HeatRisk.
The NBM box & whisker plots indicate some signal for slightly
'cooler' temperatures by Friday into next weekend, with
temperatures dropping a 2-4 degrees, resulting in mostly Minor
HeatRisk.

&&

.AVIATION...Valid through 12/00Z.

Isolated to scattered showers and thunderstorms across portions of
southeast AZ today, mainly south and east of Tucson. KOLS and KDUG
have the best chances of being impacted by thunderstorms this
afternoon between 21-03Z. With any thunderstorms expect variable
and gusty winds to around 30-40 knots. Otherwise, surface winds
should remain below 15 knots. SCT to BKN aoa 8-10 Kft.

Aviation discussion not updated for TAF amendments.
&&

.FIRE WEATHER...High temperatures will remain several degrees
above normal through the coming week. Daily chances for
thunderstorms and wetting rains through the week with daily
variability in coverage and intensity. Min RHs will generally be
around 15-25 percent in the lower elevations and 20-35+ percent
in the mountains. Winds will generally be less than 15 mph with
typical afternoon gusts up to 20 mph into the new week, though
stronger northwesterly winds possible in the Gila River Valley
through Monday with afternoon gusts up to 35 mph.

&&

.TWC WATCHES/WARNINGS/ADVISORIES...
None.
&&

Discussion...Peters

Visit us on Facebook...Twitter...YouTube...and at weather.gov/Tucson

In the hours before

Local storm report, Aug 10, 7:43 AM MST, 5 hours 34 minutes before

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The office that day

Everything else NWS Tucson, AZ issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 9, 5:41 PM MST	Dust Storm Advisory	TWC	Cochise	63 min
Aug 9, 5:59 PM MST	Severe Thunderstorm Warning	TWC	Cochise	46 min
Aug 9, 6:21 PM MST	Dust Storm Advisory	TWC	Cochise	30 min
Aug 9, 6:29 PM MST	Severe Thunderstorm Warning	TWC	Cochise	46 min
Aug 9, 8:21 PM MST	Areal Flood Advisory	TWC	Cochise	3 hr
Aug 10, 2:54 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Graham	51 min

Nearby

Severe Thunderstorm Warnings in Arizona, 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; radar from the NEXRAD Level II archive.