Alert archive / Arizona / Severe Thunderstorm Warnings in 2022

Severe Thunderstorm Warning 151, NWS Phoenix, AZ

August 20, 2022Maricopa County, Arizona

NWS Phoenix, AZ issued this severe thunderstorm warning at Aug 20, 2022, 8:42 PM MST for Maricopa County, Arizona. It was in force for 48 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 20, 2022, 8:42 PM MST (03:42 UTC)
Expired: Aug 20, 2022, 9:30 PM MST
In force: 48 min
Issued by: NWS Phoenix, AZ
Area: Storm-based polygon
Hail: 0.75 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 03:41 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 00:00Z, 3.7 hours before the alert went out and 49 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: 1341 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 1554 m above ground
0-6 km bulk shear: 7 kt
0-1 km storm-relative helicity: -27 m²/s²
0-3 km storm-relative helicity: 73 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 Aug 20, 4:52 PM MST, 3 hours 50 minutes earlier.

Area forecast discussion, Aug 20, 4:52 PM MST, 3 hours 50 minutes before

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In the hours before

Special weather statement, Aug 20, 6:45 PM MST, 1 hour 57 minutes before

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Special weather statement, Aug 20, 7:09 PM MST, 1 hour 33 minutes before

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Special weather statement, Aug 20, 7:23 PM MST, 1 hour 19 minutes before

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Special weather statement, Aug 20, 7:33 PM MST, 1 hour 9 minutes before

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<body>
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      <p id="message1">
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Special weather statement, Aug 20, 7:58 PM MST, 44 minutes before

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      <p id="message2">
        Please try again in a few minutes.
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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Local storm report, Aug 20, 8:02 PM MST, 40 minutes before

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<body>
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      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 20, 6:45 PM MST	Special Weather Statement	PSR		30 min
Aug 20, 7:09 PM MST	Special Weather Statement	PSR	Maricopa	36 min
Aug 20, 7:23 PM MST	Special Weather Statement	PSR		37 min
Aug 20, 7:33 PM MST	Special Weather Statement	PSR	Maricopa	27 min
Aug 20, 7:53 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	52 min
Aug 20, 7:58 PM MST	Special Weather Statement	PSR		47 min
Aug 20, 8:18 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	27 min
Aug 20, 8:20 PM MST	Areal Flood Advisory	PSR	Maricopa	3 hr
Aug 20, 8:29 PM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	4 hr
Aug 20, 8:35 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	40 min
Aug 20, 8:50 PM MST	Areal Flood Advisory	PSR	Maricopa	10 min
Aug 20, 8:51 PM MST	Areal Flood Advisory	PSR	Maricopa	3 hr
Aug 20, 8:54 PM MST	Areal Flood Advisory	PSR	Maricopa	3 hr
Aug 20, 9:00 PM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	3 hr
Aug 20, 9:09 PM MST	Areal Flood Advisory	PSR	Maricopa	3 hr
Aug 20, 9:10 PM MST	Areal Flood Advisory	PSR	Maricopa	3 hr
Aug 20, 9:14 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	46 min
Aug 20, 9:52 PM MST	Special Weather Statement	PSR	Maricopa	38 min
Aug 20, 10:15 PM MST	Areal Flood Advisory	PSR	Maricopa	3 hr
Aug 20, 10:33 PM MST	Special Weather Statement	PSR		42 min
Aug 20, 10:58 PM MST	Severe Thunderstorm Warning	PSR	La Paz, Maricopa	32 min
Aug 20, 11:07 PM MST	Flash Flood Warning Considerable damage threat	PSR	La Paz, Maricopa	7 hr
Aug 20, 11:29 PM MST	Severe Thunderstorm Warning	PSR	La Paz, Maricopa	31 min
Aug 21, 2:00 AM MST	Special Weather Statement	PSR		60 min
Aug 21, 2:43 AM MST	Areal Flood Advisory	PSR	Maricopa	3 hr
Aug 21, 3:06 AM MST	Special Weather Statement	PSR		54 min
Aug 21, 3:30 AM MST	Flash Flood Warning Considerable damage threat	PSR	Gila	6 hr
Aug 21, 3:37 AM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	4 hr
Aug 21, 3:52 AM MST	Special Weather Statement	PSR	Gila	53 min
Aug 21, 4:07 AM MST	Areal Flood Advisory	PSR	Maricopa	3 hr
Aug 21, 4:37 AM MST	Special Weather Statement	PSR		53 min
Aug 21, 4:56 AM MST	Special Weather Statement	PSR	Pinal	49 min
Aug 21, 5:08 AM MST	Flash Flood Warning Considerable damage threat	PSR	Gila, Maricopa	4 hr
Aug 21, 9:14 AM MST	Areal Flood Warning	PSR	Gila	23 hr
Aug 21, 4:28 PM MST	Special Weather Statement	PSR		32 min
Aug 21, 4:43 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	47 min
Aug 21, 4:48 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	42 min

Nearby

Severe Thunderstorm Warnings in Arizona, 2022 Every severe thunderstorm warning in 2022

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.