Alert archive / Arizona / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 87, NWS Tucson, AZ

August 17, 2023Pima County, Pinal County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Aug 17, 2023, 3:45 PM MST for Pima County, Pinal County, Arizona. It was in force for 45 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: Aug 17, 2023, 3:45 PM MST (22:45 UTC)
Expired: Aug 17, 2023, 4:30 PM MST
In force: 45 min
Issued by: NWS Tucson, AZ
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Pima County, AZ, Pinal County, AZ

The radar

The Phoenix radar (KIWA), 88 km from the middle of the area, began a volume at 22:46 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.

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 Aug 17, 3:14 PM MST, 31 minutes earlier.

Area forecast discussion, Aug 17, 3:14 PM MST, 31 minutes before

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In the hours before

Special weather statement, Aug 17, 12:27 PM MST, 3 hours 18 minutes before

Special Weather Statement
National Weather Service Tucson AZ
1227 PM MST Thu Aug 17 2023

AZZ503-513-172015-
Dragoon/Mule/Huachuca and Santa Rita Mountains including
Bisbee/Canelo Hills/Madera Canyon-Upper Santa Cruz River and Altar
Valleys including Nogales-
1227 PM MST Thu Aug 17 2023

...A strong thunderstorm will impact portions of southeastern Santa
Cruz County through 115 PM MST...

At 1227 PM MST, Doppler radar was tracking a strong thunderstorm 7
miles southeast of Nogales International Airport, or 12 miles east of
Nogales. This storm was nearly stationary.

HAZARD...Wind gusts up to 50 mph and half inch 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...
Nogales, Patagonia, Nogales International Airport, Patagonia Lake
State Park, Kino Springs and Lochiel.

This includes Route 82 between mile markers 4 and 18.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3151 11096 3155 11066 3133 11054 3133 11089
TIME...MOT...LOC 1927Z 150DEG 2KT 3137 11073

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

JT

Special weather statement, Aug 17, 1:10 PM MST, 2 hours 35 minutes before

Special Weather Statement
National Weather Service Tucson AZ
110 PM MST Thu Aug 17 2023

AZZ503-504-507-513-172100-
Upper San Pedro River Valley including Sierra
Vista/Benson-Dragoon/Mule/Huachuca and Santa Rita Mountains including
Bisbee/Canelo Hills/Madera Canyon-Upper Santa Cruz River and Altar
Valleys including Nogales-Tucson Metro Area including Tucson/Green
Valley/Marana/Vail-
110 PM MST Thu Aug 17 2023

...A strong thunderstorm will impact portions of east central Pima
and northeastern Santa Cruz Counties through 200 PM MST...

At 109 PM MST, Doppler radar was tracking a strong thunderstorm 10
miles west of Sonoita, or 14 miles east of Tubac. This storm was
nearly stationary.

HAZARD...Wind gusts up to 50 mph and half inch 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...
Patagonia, Sonoita and Madera Canyon.

This includes the following highways...
 Interstate 19 between mile markers 32 and 33.
 Route 82 between mile markers 20 and 31.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 3155 11065 3152 11092 3176 11105 3189 11077
      3172 11068
TIME...MOT...LOC 2009Z 152DEG 4KT 3170 11083

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

CSC

Special weather statement, Aug 17, 1:12 PM MST, 2 hours 33 minutes before

Special Weather Statement
National Weather Service Tucson AZ
112 PM MST Thu Aug 17 2023

AZZ504-507-513-514-172100-
Santa Catalina and Rincon Mountains including Mount
Lemmon/Summerhaven-Upper San Pedro River Valley including Sierra
Vista/Benson-Dragoon/Mule/Huachuca and Santa Rita Mountains including
Bisbee/Canelo Hills/Madera Canyon-Tucson Metro Area including
Tucson/Green Valley/Marana/Vail-
112 PM MST Thu Aug 17 2023

...A strong thunderstorm will impact portions of east central Pima
County through 200 PM MST...

At 112 PM MST, Doppler radar was tracking a strong thunderstorm near
Vail, or 12 miles southeast of Davis-Monthan Air Force Base. This
storm was nearly stationary.

HAZARD...Wind gusts up to 50 mph and half inch 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...
Tucson, Davis-Monthan Air Force Base, Vail, East Sahuarita, Corona De
Tucson, Tucson International Airport, Summit, Saguaro National Park
East and Rita Ranch.

This includes the following highways...
 Interstate 10 between mile markers 266 and 294.
 Interstate 19 near mile marker 57.
 Route 83 between mile markers 43 and 58.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3197 11047 3180 11072 3211 11100 3223 11069
TIME...MOT...LOC 2012Z 141DEG 3KT 3202 11075

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

JT

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 16, 5:47 PM MST	Special Weather Statement	TWC		43 min
Aug 16, 6:00 PM MST	Severe Thunderstorm Warning	TWC	Pima, Pinal	45 min
Aug 16, 6:05 PM MST	Areal Flood Advisory	TWC	Pima	115 min
Aug 17, 12:27 PM MST	Special Weather Statement	TWC	Santa Cruz	48 min
Aug 17, 1:10 PM MST	Special Weather Statement	TWC	Santa Cruz	50 min
Aug 17, 1:12 PM MST	Special Weather Statement	TWC	Santa Cruz	48 min
Aug 17, 1:14 PM MST	Severe Thunderstorm Warning	TWC	Pima, Santa Cruz	46 min
Aug 17, 1:59 PM MST	Areal Flood Advisory	TWC	Pima, Santa Cruz	3 hr
Aug 17, 2:07 PM MST	Flood Watch	TWC	Pima, Pinal, Santa Cruz	59 hr
Aug 17, 2:23 PM MST	Severe Thunderstorm Warning	TWC	Pima, Santa Cruz	52 min
Aug 17, 2:55 PM MST	Severe Thunderstorm Warning	TWC	Pima	50 min
Aug 17, 3:27 PM MST	Dust Storm Advisory	TWC	Pima, Pinal	63 min
Aug 17, 3:42 PM MST	Areal Flood Advisory	TWC	Pima	2 hr
Aug 17, 4:08 PM MST	Areal Flood Advisory	TWC	Pima	112 min
Aug 17, 4:38 PM MST	Severe Thunderstorm Warning	TWC	Pima, Pinal	52 min

Nearby

Severe Thunderstorm Warnings in Arizona, 2023 Every severe thunderstorm warning in 2023

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.