Alert archive / Arizona / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 123, NWS Tucson, AZ

September 26, 2019Pima County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Sep 26, 2019, 3:32 PM MST for Pima 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: Sep 26, 2019, 3:32 PM MST (22:32 UTC)
Expired: Sep 26, 2019, 4:15 PM MST
In force: 43 min
Issued by: NWS Tucson, AZ
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

County Pima County, AZ

The radar

The Tucson radar (KEMX), 112 km from the middle of the area, began a volume at 22:34 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

Yuma Prvg Ground, AZ (K1Y7), launched 12:00Z, 10.5 hours before the alert went out and 249 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: 408 J/kg
Mixed-layer CIN: -52 J/kg
Mixed-layer LCL: 962 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 34 m²/s²
0-3 km storm-relative helicity: 54 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 25, 5:16 PM MST	Special Weather Statement	TWC	Pima	59 min
Sep 25, 5:36 PM MST	Severe Thunderstorm Warning	TWC	Cochise	28 min
Sep 25, 5:58 PM MST	Special Weather Statement	TWC	Pinal	47 min
Sep 26, 10:51 AM MST	Special Weather Statement	TWC	Pima	39 min
Sep 26, 12:55 PM MST	Special Weather Statement	TWC	Pinal	35 min
Sep 26, 3:23 PM MST	Special Weather Statement	TWC		37 min
Sep 26, 3:41 PM MST	Tornado Warning	TWC	Pima	21 min

Nearby

Severe Thunderstorm Warnings in Arizona, 2019 Every severe thunderstorm warning in 2019

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.