Alert archive / Arizona / Severe Thunderstorm Warnings in 2025

Severe Thunderstorm Warning 7, NWS Flagstaff, AZ

July 3, 2025Coconino County, Arizona

NWS Flagstaff, AZ issued this severe thunderstorm warning at Jul 3, 2025, 3:25 PM MST for Coconino County, Arizona. It was in force for 50 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: Jul 3, 2025, 3:25 PM MST (22:25 UTC)
Expired: Jul 3, 2025, 4:15 PM MST
In force: 50 min
Issued by: NWS Flagstaff, AZ
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Coconino County, AZ

The radar

The Flagstaff radar (KFSX), 150 km from the middle of the area, began a volume at 22:25 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

Phoenix, AZ (KPSR), launched 12:00Z, 10.4 hours before the alert went out and 268 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: 41 J/kg
Mixed-layer CIN: -171 J/kg
Mixed-layer LCL: 1405 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 51 m²/s²
0-3 km storm-relative helicity: 44 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 Flagstaff, AZ wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 3, 3:03 PM MST, 22 minutes earlier.

Area forecast discussion, Jul 3, 3:03 PM MST, 22 minutes before

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In the hours before

Special weather statement, Jul 3, 12:34 PM MST, 2 hours 51 minutes before

Special Weather Statement
National Weather Service Flagstaff AZ
1234 PM MST Thu Jul 3 2025

AZZ008-037-032015-
Yavapai County Valleys and Basins AZ-Yavapai County Mountains AZ-
1234 PM MST Thu Jul 3 2025

...A STRONG THUNDERSTORM WILL IMPACT YAVAPAI COUNTY UNTIL 115 PM
MST...

At 1234 PM MST, Doppler radar was tracking a strong thunderstorm
over Dewey-Humboldt, or 6 miles southeast of Prescott Valley, moving
east at 10 mph.

HAZARD...Wind gusts up to 50 mph and half inch size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is possible.

Locations impacted include...
  Prescott Valley, Clarkdale, Dewey-Humboldt, Yavapai County
  Fairgrounds, Mayer, Cottonwood, Mountainview Park, Poland Junction
  and Mingus Mountain.

This includes the following highways...
	State Route 69 between mile markers 274 and 288.
	Interstate 17 near mile marker 267.
	State Route 89A between mile markers 324 and 337.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the weather situation closely and be alert for threatening
weather conditions.

&&

LAT...LON 3446 11234 3469 11233 3474 11205 3438 11209
TIME...MOT...LOC 1933Z 281DEG 8KT 3454 11226

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH

Bernhart

Local storm report, Jul 3, 1:41 PM MST, 1 hour 44 minutes before

Preliminary Local Storm Report
National Weather Service Flagstaff AZ
141 PM MST Thu Jul 3 2025

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

0140 PM     Hail             2 ESE Dewey-Humboldt    34.52N 112.22W
07/03/2025  M0.50 Inch       Yavapai            AZ   Trained Spotter

&&

MCT

Local storm report, Jul 3, 2:09 PM MST, 1 hour 16 minutes before

Preliminary Local Storm Report
National Weather Service Flagstaff AZ
209 PM MST Thu Jul 3 2025

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

0201 PM     Hail             Cornville               34.72N 111.91W
07/03/2025  M0.50 Inch       Yavapai            AZ   Trained Spotter

&&

JML

Local storm report, Jul 3, 3:03 PM MST, 22 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 3, 12:34 PM MST	Special Weather Statement	FGZ	Yavapai	41 min
Jul 3, 1:09 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	51 min
Jul 3, 1:53 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	52 min
Jul 3, 2:34 PM MST	Areal Flood Advisory	FGZ	Yavapai	3 hr

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.