Alert archive / Arizona / Severe Thunderstorm Warnings in 2024

Severe Thunderstorm Warning 3, NWS Flagstaff, AZ

April 25, 2024Coconino County, Yavapai County, Arizona

NWS Flagstaff, AZ issued this severe thunderstorm warning at Apr 25, 2024, 3:53 PM MST for Coconino County, Yavapai County, Arizona. It was in force for 37 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: Apr 25, 2024, 3:53 PM MST (22:53 UTC)
Expired: Apr 25, 2024, 4:30 PM MST
In force: 37 min
Issued by: NWS Flagstaff, AZ
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Coconino County, AZ, Yavapai County, AZ

The nearest sounding before it

Flgstf/Belemont, AZ (KFGZ), launched 12:00Z, 10.9 hours before the alert went out and 33 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1695 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 31 m²/s²
0-3 km storm-relative helicity: 95 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 Apr 25, 2:53 PM MST, 1 hour earlier.

Area forecast discussion, Apr 25, 2:53 PM MST, 1 hour before

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In the hours before

Special weather statement, Apr 25, 10:18 AM MST, 5 hours 35 minutes before

Special Weather Statement
National Weather Service Flagstaff AZ
1018 AM MST Thu Apr 25 2024

AZZ007-012-015-251745-
Little Colorado River Valley in Coconino County-Western Mogollon
Rim-Coconino Plateau-
1018 AM MST Thu Apr 25 2024

...A STRONG THUNDERSTORM WILL IMPACT COCONINO COUNTY THROUGH 1045 AM
MST...

At 1016 AM MST, Doppler radar was tracking a strong thunderstorm near
Saddle Mountain, or 18 miles north of Flagstaff, moving north at 10
mph.

HAZARD...Wind gusts up to 40 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible. Hail could cover roadways.

Locations impacted include...
Nalahiku Pueblo in Wupatki N.M., Saddle Mountain, and Wupatki
National Monument.

This includes U.S. Highway 89 between mile markers 433 and 447.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3540 11155 3543 11174 3565 11175 3560 11145
TIME...MOT...LOC 1716Z 194DEG 10KT 3547 11163

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

NWS Flagstaff

Special weather statement, Apr 25, 12:25 PM MST, 3 hours 28 minutes before

Special Weather Statement
National Weather Service Flagstaff AZ
1225 PM MST Thu Apr 25 2024

AZZ008-037-252000-
Yavapai County Valleys and Basins-Yavapai County Mountains-
1225 PM MST Thu Apr 25 2024

...A STRONG THUNDERSTORM WILL IMPACT YAVAPAI COUNTY THROUGH 100 PM
MST...

At 1225 PM MST, Doppler radar was tracking a strong thunderstorm near
Prescott Airport, or near Chino Valley, moving east at 35 mph.

HAZARD...Wind gusts up to 40 mph and half inch hail.

SOURCE...Radar indicated.

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

Locations impacted include...
Chino Valley, Prescott Valley, Yavapai County Fairgrounds, Mountain
Valley Park, and Antelope Park.

This includes the following highways...
 State Route 89 between mile markers 321 and 327.
 State Route 89A between mile markers 321 and 328.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3469 11251 3478 11243 3480 11219 3459 11229
TIME...MOT...LOC 1925Z 282DEG 32KT 3471 11236

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH

NWS Flagstaff

Special weather statement, Apr 25, 3:35 PM MST, 18 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
Apr 25, 2:56 AM MST	Wind Advisory	FGZ	Apache, Navajo	16 hr
Apr 25, 10:18 AM MST	Special Weather Statement	FGZ	Coconino	27 min
Apr 25, 12:25 PM MST	Special Weather Statement	FGZ	Yavapai	35 min
Apr 25, 12:57 PM MST	Wind Advisory	FGZ	Apache, Coconino, Navajo	30 hr
Apr 25, 3:35 PM MST	Special Weather Statement	FGZ		55 min
Apr 25, 4:39 PM MST	Special Weather Statement	FGZ		66 min

Nearby

Severe Thunderstorm Warnings in Arizona, 2024 Every severe thunderstorm warning in 2024

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.