Alert archive / Arizona / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 73, NWS Phoenix, AZ

September 12, 2023Maricopa County, Arizona

NWS Phoenix, AZ issued this severe thunderstorm warning at Sep 12, 2023, 6:47 PM MST for Maricopa 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 12, 2023, 6:47 PM MST (01:47 UTC)
Expired: Sep 12, 2023, 7:30 PM MST
In force: 43 min
Issued by: NWS Phoenix, AZ
Area: Storm-based polygon
Hail: 0.88 in
Wind: 60.0 mph

County Maricopa County, AZ

The radar

The Phoenix radar (KIWA), 77 km from the middle of the area, began a volume at 01:49 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.

In the hours before

Special weather statement, Sep 12, 5:24 PM MST, 1 hour 23 minutes before

Special Weather Statement
National Weather Service Phoenix AZ
524 PM MST Tue Sep 12 2023

AZZ532-535-536-130100-
Gila River Valley AZ-Southeast Yuma County AZ-Yuma AZ-
524 PM MST Tue Sep 12 2023

...A strong thunderstorm will impact portions of central Yuma County
through 600 PM MST...

At 524 PM MST, Doppler radar was tracking a strong thunderstorm near
Ligurta, or 8 miles southeast of Fortuna Foothills, moving northeast
at 15 mph.

HAZARD...Winds in excess of 40 mph and penny size 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...
Fortuna Foothills, Wellton, and Ligurta.

This includes AZ Interstate 8 between mile markers 19 and 37.

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.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3249 11427 3260 11440 3280 11422 3267 11402
TIME...MOT...LOC 0024Z 224DEG 14KT 3261 11427

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...40 MPH

JL

Local storm report, Sep 12, 6:04 PM MST, 43 minutes before

Preliminary Local Storm Report
National Weather Service Phoenix AZ
604 PM MST Tue Sep 12 2023

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0310 PM     Tstm Wnd Dmg     6 SE Ahwatukee Foothill 33.25N 111.98W
09/12/2023                   Maricopa           AZ   Broadcast Media

            Multiple reports of power poles down near on
            Maricopa Rd west of I-10. Traffic signals
            out leading to significant traffic impacts.

&&

RW

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 12, 5:04 PM MST	Areal Flood Advisory	PSR	Maricopa	116 min
Sep 12, 5:15 PM MST	Severe Thunderstorm Warning	PSR	Gila, Maricopa	45 min
Sep 12, 5:24 PM MST	Special Weather Statement	PSR	Yuma	36 min
Sep 12, 5:49 PM MST	Flash Flood Warning Considerable damage threat	PSR	Gila, Maricopa	4 hr
Sep 12, 5:58 PM MST	Severe Thunderstorm Warning	PSR	Gila, Maricopa	32 min
Sep 12, 6:15 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	30 min
Sep 12, 7:25 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	50 min
Sep 12, 7:50 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	40 min
Sep 12, 8:06 PM MST	Areal Flood Advisory	PSR	Maricopa	2 hr
Sep 12, 8:30 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	45 min
Sep 12, 9:04 PM MST	Severe Thunderstorm Warning	PSR	Pinal	26 min
Sep 12, 9:10 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	35 min
Sep 12, 9:29 PM MST	Areal Flood Advisory	PSR	Maricopa, Pinal	4 hr
Sep 12, 9:43 PM MST	Areal Flood Advisory	PSR	Pinal	2 hr
Sep 12, 9:47 PM MST	Special Weather Statement	PSR	Pinal	43 min
Sep 12, 10:07 PM MST	Severe Thunderstorm Warning	PSR	Pinal	38 min
Sep 12, 10:30 PM MST	Special Weather Statement	PSR		45 min
Sep 12, 10:40 PM MST	Flash Flood Warning Considerable damage threat	PSR	Pinal	3 hr
Sep 12, 11:33 PM MST	Areal Flood Advisory	PSR	Gila, Maricopa	3 hr
Sep 13, 12:21 AM MST	Special Weather Statement	PSR		39 min
Sep 13, 12:35 AM MST	Special Weather Statement	PSR	Gila	40 min
Sep 13, 12:54 AM MST	Areal Flood Advisory	PSR	Gila, Maricopa	113 min
Sep 13, 12:59 AM MST	Severe Thunderstorm Warning	PSR	Gila	46 min
Sep 13, 2:51 AM MST	Flash Flood Warning Considerable damage threat	PSR	Gila, Maricopa	6 hr
Sep 13, 5:23 AM MST	Special Weather Statement	PSR		37 min
Sep 13, 5:34 AM MST	Areal Flood Advisory	PSR	Maricopa, Pinal	35 min
Sep 13, 6:08 AM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa, Pinal	3 hr
Sep 13, 6:41 AM MST	Severe Thunderstorm Warning	PSR	Maricopa	34 min
Sep 13, 6:45 AM MST	Severe Thunderstorm Warning	PSR	Gila	45 min
Sep 13, 7:30 AM MST	Areal Flood Advisory	PSR	Gila	14 min
Sep 13, 7:44 AM MST	Flash Flood Warning Considerable damage threat	PSR	Gila, Maricopa	3 hr
Sep 13, 7:53 AM MST	Flash Flood Warning Considerable damage threat	PSR	Gila	3 hr
Sep 13, 7:56 AM MST	Areal Flood Advisory	PSR	Gila, Maricopa, Pinal	3 hr
Sep 13, 12:46 PM MST	Special Weather Statement	PSR		44 min
Sep 13, 12:51 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	39 min
Sep 13, 12:57 PM MST	Special Weather Statement	PSR		3 hr

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.