Alert archive / Arizona / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 57, NWS Phoenix, AZ

August 12, 2018Gila County, Maricopa County, Pinal County, Arizona

NWS Phoenix, AZ issued this severe thunderstorm warning at Aug 12, 2018, 3:46 PM MST for Gila County, Maricopa County, Pinal County, Arizona. It was in force for 44 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 12, 2018, 3:46 PM MST (22:46 UTC)
Expired: Aug 12, 2018, 4:30 PM MST
In force: 44 min
Issued by: NWS Phoenix, AZ
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Gila County, AZ, Maricopa County, AZ, Pinal County, AZ

The radar

The Phoenix radar (KIWA), 13 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Aug 12, 3:40 PM MST	Severe Thunderstorm Watch	SPC	7 hr

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 12, 1:30 PM MST, 2 hours 16 minutes earlier.

Area forecast discussion, Aug 12, 1:30 PM MST, 2 hours 16 minutes before

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In the hours before

Local storm report, Aug 12, 1:04 PM MST, 2 hours 42 minutes before

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  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
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  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <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.
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      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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Special weather statement, Aug 12, 3:22 PM MST, 24 minutes before

Special Weather Statement
National Weather Service Phoenix AZ
322 PM MST SUN AUG 12 2018

AZZ556-558-562-563-122300-
Southeast Gila County AZ-Tonto Basin AZ-Globe/Miami AZ-
Pinal/Superstition Mountains AZ-
322 PM MST SUN AUG 12 2018

...SIGNIFICANT WEATHER ADVISORY FOR GILA...MARICOPA AND PINAL
COUNTIES UNTIL 400 PM MST...

At 321 PM MST, Doppler radar was tracking a strong thunderstorm 11
miles northeast of Tonto National Monument, or 12 miles east of
Roosevelt, moving south at 20 mph.

Nickel size hail and wind gusts of 50 to 55 mph will be possible with
this storm.

Locations impacted include...
Miami, Tonto National Monument and Inspiration.

This includes AZ Route 188 between mile markers 219 and 240.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 3376 11099 3374 11096 3364 11092 3368 11084
      3366 11078 3372 11073 3371 11073 3339 11088
      3347 11120 3377 11105
TIME...MOT...LOC 2221Z 021DEG 17KT 3371 11092

Rogers

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 12, 3:22 PM MST	Special Weather Statement	PSR	Gila	38 min
Aug 12, 3:49 PM MST	Special Weather Statement	PSR	Gila	41 min
Aug 12, 4:24 PM MST	Special Weather Statement	PSR	Gila	51 min
Aug 12, 4:27 PM MST	Special Weather Statement	PSR	Pinal	48 min
Aug 12, 4:35 PM MST	Areal Flood Advisory	PSR	Gila, Maricopa, Pinal	3 hr

Nearby

Severe Thunderstorm Warnings in Arizona, 2018 Every severe thunderstorm warning in 2018

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.