Alert archive / Arizona / Severe Thunderstorm Warnings in 2024

Severe Thunderstorm Warning 160, NWS Tucson, AZ

July 21, 2024Graham County, Greenlee County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Jul 21, 2024, 2:12 PM MST for Graham County, Greenlee County, Arizona. It was in force for 63 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 21, 2024, 2:12 PM MST (21:12 UTC)
Expired: Jul 21, 2024, 3:15 PM MST
In force: 63 min
Issued by: NWS Tucson, AZ
Area: Storm-based polygon
Hail: 0.75 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 21:12 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, 9.2 hours before the alert went out and 227 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: 223 J/kg
Mixed-layer CIN: -342 J/kg
Mixed-layer LCL: 2147 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 14 m²/s²
0-3 km storm-relative helicity: 56 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 Tucson, AZ wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 21, 9:06 AM MST, 5 hours 6 minutes earlier.

Area forecast discussion, Jul 21, 9:06 AM MST, 5 hours 6 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
Jul 20, 5:12 PM MST	Severe Thunderstorm Warning	TWC	Pima, Santa Cruz	48 min
Jul 20, 5:21 PM MST	Areal Flood Advisory	TWC	Pima	114 min
Jul 20, 5:39 PM MST	Severe Thunderstorm Warning	TWC	Cochise	51 min
Jul 20, 5:42 PM MST	Areal Flood Advisory	TWC	Cochise, Graham	2 hr
Jul 20, 5:45 PM MST	Dust Storm Advisory	TWC	Pima	60 min
Jul 20, 5:48 PM MST	Severe Thunderstorm Warning	TWC	Pima	42 min
Jul 20, 5:53 PM MST	Areal Flood Advisory	TWC	Pima	112 min
Jul 20, 5:57 PM MST	Severe Thunderstorm Warning	TWC	Pima	48 min
Jul 20, 6:03 PM MST	Flash Flood Warning	TWC	Pima	3 hr
Jul 20, 6:51 PM MST	Severe Thunderstorm Warning	TWC	Pinal	39 min
Jul 20, 7:17 PM MST	Areal Flood Advisory	TWC	Cochise	118 min
Jul 20, 8:08 PM MST	Dust Storm Advisory	TWC	Pinal	67 min
Jul 21, 3:35 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Graham	40 min
Jul 21, 3:42 PM MST	Dust Storm Advisory	TWC	Cochise	63 min
Jul 21, 3:48 PM MST	Severe Thunderstorm Warning	TWC	Pinal	42 min
Jul 21, 4:00 PM MST	Areal Flood Advisory	TWC	Graham	2 hr
Jul 21, 4:06 PM MST	Dust Storm Warning	TWC	Cochise	39 min
Jul 21, 4:12 PM MST	Areal Flood Advisory	TWC	Pinal	2 hr
Jul 21, 4:22 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Graham	38 min
Jul 21, 4:31 PM MST	Severe Thunderstorm Warning	TWC	Pima	44 min
Jul 21, 4:46 PM MST	Severe Thunderstorm Warning	TWC	Cochise	44 min
Jul 21, 4:59 PM MST	Areal Flood Advisory	TWC	Cochise	2 hr

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.