Alert archive / Arizona / Severe Thunderstorm Warnings in 2024

Severe Thunderstorm Warning 50, NWS Flagstaff, AZ

July 15, 2024Coconino County, Gila County, Arizona

NWS Flagstaff, AZ issued this severe thunderstorm warning at Jul 15, 2024, 5:45 PM MST for Coconino County, Gila County, Arizona. It was in force for 30 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 15, 2024, 5:45 PM MST (00:45 UTC)
Expired: Jul 15, 2024, 6:15 PM MST
In force: 30 min
Issued by: NWS Flagstaff, AZ
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Coconino County, AZ, Gila County, AZ

The radar

The Flagstaff radar (KFSX), 29 km from the middle of the area, began a volume at 00:45 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

Flgstf/Belemont, AZ (KFGZ), launched 00:00Z, 0.8 hours before the alert went out and 65 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: 107 J/kg
Mixed-layer CIN: -47 J/kg
Mixed-layer LCL: 2460 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: -15 m²/s²
0-3 km storm-relative helicity: 63 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 15, 4:15 PM MST, 1 hour 30 minutes earlier.

Area forecast discussion, Jul 15, 4:15 PM MST, 1 hour 30 minutes before

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In the hours before

Special weather statement, Jul 15, 1:12 PM MST, 4 hours 33 minutes before

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Special weather statement, Jul 15, 1:58 PM MST, 3 hours 47 minutes before

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Local storm report, Jul 15, 2:40 PM MST, 3 hours 5 minutes before

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Special weather statement, Jul 15, 2:52 PM MST, 2 hours 53 minutes before

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Special weather statement, Jul 15, 3:11 PM MST, 2 hours 34 minutes before

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Local storm report, Jul 15, 5:42 PM MST, 3 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 15, 6:11 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino, Gila	3 hr
Jul 15, 6:23 PM MST	Severe Thunderstorm Warning	FGZ	Coconino, Gila	37 min
Jul 16, 12:18 PM MST	Special Weather Statement	FGZ	Apache	27 min
Jul 16, 12:34 PM MST	Special Weather Statement	FGZ		26 min
Jul 16, 1:03 PM MST	Special Weather Statement	FGZ		27 min
Jul 16, 1:25 PM MST	Special Weather Statement	FGZ		35 min
Jul 16, 2:11 PM MST	Special Weather Statement	FGZ		34 min
Jul 16, 2:24 PM MST	Special Weather Statement	FGZ		36 min
Jul 16, 2:29 PM MST	Severe Thunderstorm Warning	FGZ	Gila, Navajo	31 min
Jul 16, 3:20 PM MST	Special Weather Statement	FGZ	Yavapai	25 min
Jul 16, 4:21 PM MST	Special Weather Statement	FGZ	Gila	24 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; radar from the NEXRAD Level II archive.