Alert archive / Arizona / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 83, NWS Phoenix, AZ

September 13, 2023Maricopa County, Pinal County, Arizona

NWS Phoenix, AZ issued this severe thunderstorm warning at Sep 13, 2023, 12:51 PM MST for Maricopa County, Pinal County, Arizona. It was in force for 39 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 13, 2023, 12:51 PM MST (19:51 UTC)
Expired: Sep 13, 2023, 1:30 PM MST
In force: 39 min
Issued by: NWS Phoenix, AZ
Area: Storm-based polygon
Hail: 0.88 in
Wind: 60.0 mph

Counties Maricopa County, AZ, Pinal County, AZ

The radar

The Phoenix radar (KIWA), 29 km from the middle of the area, began a volume at 19:53 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, 7.9 hours before the alert went out and 34 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2337 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 97 m²/s²
0-3 km storm-relative helicity: 175 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 Phoenix, AZ wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 13, 11:38 AM MST, 1 hour 13 minutes earlier.

Area forecast discussion, Sep 13, 11:38 AM MST, 1 hour 13 minutes before

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In the hours before

Local storm report, Sep 13, 11:37 AM MST, 1 hour 14 minutes before

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Local storm report, Sep 13, 12:26 PM MST, 25 minutes before

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      <div class="status" id="status">Temporary Notice</div>
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Special weather statement, Sep 13, 12:46 PM MST, 5 minutes before

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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, 6:47 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	43 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, 12:57 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.