Alert archive / Arizona / Special Weather Statements in 2021

Special Weather Statement, NWS Phoenix, AZ

September 18, 2021Maricopa County, Arizona

NWS Phoenix, AZ issued this special weather statement at Sep 18, 2021, 12:48 PM MST for Maricopa County, Arizona. It was in force for 27 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Sep 18, 2021, 12:48 PM MST (19:48 UTC)
Expired: Sep 18, 2021, 1:15 PM MST
In force: 27 min
Issued by: NWS Phoenix, AZ
Hail: 0.25 in
Wind: 40

County Maricopa County, AZ

The radar

The Phoenix radar (KIWA), 50 km from the middle of the area, began a volume at 19:51 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 text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Sep 18, 11:00 AM MST, 1 hour 48 minutes earlier.

Area forecast discussion, Sep 18, 11:00 AM MST, 1 hour 48 minutes before

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</head>
<body>
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    <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.
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In the hours before

Special weather statement, Sep 18, 11:51 AM MST, 57 minutes before

Special Weather Statement
National Weather Service Phoenix AZ
1151 AM MST Sat Sep 18 2021

AZZ540-553-554-559-181915-
Sonoran Desert Natl Monument AZ-Buckeye/Avondale AZ-
Northwest Pinal County AZ-West Pinal County AZ-
1151 AM MST Sat Sep 18 2021

...A strong thunderstorm will impact portions of Maricopa and Pinal
Counties through 1215 PM MST...

At 1150 AM MST, Doppler radar was tracking a strong thunderstorm 7
miles west of Estrella Sailport, or 24 miles east of Gila Bend,
moving north at 20 mph.

HAZARD...Winds in excess of 40 mph and pea 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...
Estrella, Estrella Sailport, Rainbow Valley and Mobile.

This includes AZ Route 238 between mile markers 18 and 37.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3296 11220 3298 11242 3324 11241 3321 11210
TIME...MOT...LOC 1850Z 189DEG 20KT 3306 11229

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

INS

Special weather statement, Sep 18, 12:22 PM MST, 26 minutes before

Special Weather Statement
National Weather Service Phoenix AZ
1222 PM MST Sat Sep 18 2021

AZZ540-553-554-559-182000-
Sonoran Desert Natl Monument AZ-Buckeye/Avondale AZ-
Northwest Pinal County AZ-West Pinal County AZ-
1222 PM MST Sat Sep 18 2021

...A strong thunderstorm will impact portions of Maricopa and Pinal
Counties through 100 PM MST...

At 1222 PM MST, Doppler radar was tracking a strong thunderstorm near
Estrella Sailport, or 23 miles southwest of Sun Lakes, moving north
at 15 mph.

HAZARD...Winds in excess of 40 mph and pea 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...
Estrella, Estrella Sailport, Rainbow Valley and Mobile.

This includes AZ Route 238 between mile markers 18 and 38.

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 3297 11217 3298 11242 3325 11242 3330 11222
      3321 11210
TIME...MOT...LOC 1922Z 186DEG 14KT 3306 11223

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

INS

Special weather statement, Sep 18, 12:48 PM MST, 0 minutes before

Special Weather Statement
National Weather Service Phoenix AZ
1248 PM MST Sat Sep 18 2021

AZZ540-543-544-550-553-182015-
South Mountain/Ahwatukee AZ-Buckeye/Avondale AZ-
Northwest Pinal County AZ-Central Phoenix AZ-
North Phoenix/Glendale AZ-
1248 PM MST Sat Sep 18 2021

...A strong thunderstorm will impact portions of Maricopa and Pinal
Counties through 115 PM MST...

At 1248 PM MST, Doppler radar was tracking a strong thunderstorm over
Avondale, moving north at 15 mph.

HAZARD...Winds in excess of 40 mph and pea 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...
Phoenix, Avondale, Goodyear, Tolleson, Laveen, Cashion, Litchfield
Park, South Phoenix, South Mountain Park, Phoenix International
Raceway, Estrella Mountain Park, Estrella Mountain Ranch and Komatke.

This includes the following highways...
AZ Interstate 10 between mile markers 123 and 143.
AZ Interstate 17 between mile markers 196 and 200.
AZ Route 101 between mile markers 2 and 4.

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 3323 11209 3332 11248 3355 11246 3346 11209
      3334 11198
TIME...MOT...LOC 1948Z 186DEG 14KT 3339 11236

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

INS

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 17, 5:43 PM MST	Special Weather Statement	PSR	Yuma	32 min
Sep 18, 11:51 AM MST	Special Weather Statement	PSR	Maricopa	24 min
Sep 18, 12:13 PM MST	Areal Flood Advisory	PSR	Maricopa	22 min
Sep 18, 12:22 PM MST	Special Weather Statement	PSR	Maricopa	38 min
Sep 18, 12:35 PM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa, Pinal	4 hr
Sep 18, 1:11 PM MST	Areal Flood Advisory	PSR	Maricopa	2 hr
Sep 18, 1:30 PM MST	Special Weather Statement	PSR	Maricopa	30 min
Sep 18, 1:39 PM MST	Special Weather Statement	PSR	Maricopa	66 min
Sep 18, 1:46 PM MST	Areal Flood Advisory	PSR	Maricopa	119 min
Sep 18, 2:05 PM MST	Special Weather Statement	PSR		25 min
Sep 18, 2:15 PM MST	Dust Storm Advisory	PSR	Maricopa, Pinal	45 min
Sep 18, 2:46 PM MST	Special Weather Statement	PSR		44 min
Sep 18, 2:54 PM MST	Dust Storm Advisory	PSR	Maricopa, Pinal	66 min
Sep 18, 3:00 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	45 min
Sep 18, 3:08 PM MST	Areal Flood Advisory	PSR	Maricopa, Pinal	3 hr
Sep 18, 3:17 PM MST	Dust Storm Warning	PSR	Maricopa, Pinal	43 min
Sep 18, 3:23 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	35 min
Sep 18, 4:34 PM MST	Special Weather Statement	PSR	Pinal	41 min
Sep 17, 5:09 PM MST	Special Weather Statement	PSR	Imperial	51 min
Sep 17, 5:41 PM MST	Areal Flood Advisory	PSR	Imperial, Riverside	2 hr

Nearby

Special Weather Statements in Arizona, 2021 Every special weather statement in 2021

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.