Alert archive / Arizona / Special Weather Statements in 2021

Special Weather Statement, NWS Phoenix, AZ

August 10, 2021La Paz County, Arizona

NWS Phoenix, AZ issued this special weather statement at Aug 10, 2021, 5:07 AM MST for La Paz County, Arizona. It was in force for 53 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: Aug 10, 2021, 5:07 AM MST (12:07 UTC)
Expired: Aug 10, 2021, 6:00 AM MST
In force: 53 min
Issued by: NWS Phoenix, AZ
Hail: 0.25 in
Wind: 40

County La Paz County, AZ

The radar

The Yuma radar (KYUX), 159 km from the middle of the area, began a volume at 12:08 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, 0.1 hours before the alert went out and 172 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: 110 J/kg
Mixed-layer CIN: -193 J/kg
Mixed-layer LCL: 1490 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: 11 m²/s²
0-3 km storm-relative helicity: 93 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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 Aug 10, 4:02 AM MST, 1 hour 5 minutes earlier.

Area forecast discussion, Aug 10, 4:02 AM MST, 1 hour 5 minutes before

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<head>
  <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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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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In the hours before

Special weather statement, Aug 10, 1:40 AM MST, 3 hours 27 minutes before

Special Weather Statement
National Weather Service Phoenix AZ
140 AM MST Tue Aug 10 2021

AZZ537-538-540-543-544-548-550-551-553-554-559-100930-
South Mountain/Ahwatukee AZ-Sonoran Desert Natl Monument AZ-
Buckeye/Avondale AZ-Northwest Pinal County AZ-East Valley AZ-
Tonopah Desert AZ-Southeast Valley/Queen Creek AZ-Central Phoenix AZ-
Northwest Valley AZ-West Pinal County AZ-North Phoenix/Glendale AZ-
140 AM MST Tue Aug 10 2021

...A strong thunderstorm will impact portions of Maricopa and Pinal
Counties through 230 AM MST...

At 139 AM MST, Doppler radar was tracking an area of strong
thunderstorms 8 miles north of Estrella Sailport, or 14 miles west
of Sun Lakes, moving north at 5 mph.

HAZARD...Winds in excess of 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Phoenix, Chandler, Glendale, Tempe, Surprise, Avondale, Goodyear,
Buckeye, El Mirage, Tolleson, Sun Lakes, Waddell, Laveen, Cashion,
Litchfield Park, Palo Verde, White Tank Mountain Park, South Phoenix,
Liberty and South Mountain Park.

This includes the following highways...
AZ Interstate 10 between mile markers 109 and 141, and between mile
markers 157 and 172.
AZ Interstate 17 between mile markers 198 and 199.
AZ Route 87 between mile markers 157 and 166.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3315 11199 3309 11219 3328 11237 3327 11260
      3347 11271 3362 11258 3362 11235 3347 11228
      3348 11218 3339 11201 3331 11184 3318 11173
TIME...MOT...LOC 0839Z 159DEG 5KT 3320 11213

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

JS

Special weather statement, Aug 10, 1:54 AM MST, 3 hours 13 minutes before

Special Weather Statement
National Weather Service Phoenix AZ
154 AM MST Tue Aug 10 2021

AZZ534-537-538-540-559-100945-
Sonoran Desert Natl Monument AZ-Aguila Valley AZ-Buckeye/Avondale AZ-
Tonopah Desert AZ-Northwest Valley AZ-
154 AM MST Tue Aug 10 2021

...A strong thunderstorm will impact portions of Maricopa County
through 245 AM MST...

At 154 AM MST, Doppler radar was tracking a strong thunderstorm 9
miles northwest of White Tank Mountain Park, or 13 miles southwest of
Wittmann, moving northwest at 15 mph.

HAZARD...Winds in excess of 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Buckeye, Wickenburg, Tonopah, Circle City, Painted Rock Dam,
Morristown, Cotton Center, Palo Verde Nuclear Generation Station,
Wintersburg, Hassayampa and Arlington.

This includes the following highways...
AZ Interstate 10 between mile markers 85 and 108.
US Highway 60 between mile markers 100 and 126.
AZ Route 74 between mile markers 1 and 4.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3395 11255 3362 11257 3346 11271 3326 11259
      3308 11257 3309 11298 3333 11309 3362 11310
      3385 11301 3401 11283 3400 11273
TIME...MOT...LOC 0854Z 114DEG 10KT 3364 11270

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

JS

Special weather statement, Aug 10, 2:15 AM MST, 2 hours 52 minutes before

Special Weather Statement
National Weather Service Phoenix AZ
215 AM MST Tue Aug 10 2021

AZZ540-543-544-546-548-550-551-553-101000-
South Mountain/Ahwatukee AZ-Scottsdale/Paradise Valley AZ-
Buckeye/Avondale AZ-Northwest Pinal County AZ-East Valley AZ-
Southeast Valley/Queen Creek AZ-Central Phoenix AZ-
North Phoenix/Glendale AZ-
215 AM MST Tue Aug 10 2021

...A strong thunderstorm will impact portions of Maricopa and Pinal
Counties through 300 AM MST...

At 215 AM MST, Doppler radar was tracking a strong thunderstorm over
Tumbleweed Park, or near Chandler, moving north at 10 mph.

HAZARD...Winds in excess of 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Phoenix, Mesa, Chandler, Gilbert, Tempe, Paradise Valley, Sun Lakes,
Queen Creek, Tempe Marketplace, Papago Park, Falcon Field Airport,
Salt River Indian Community, South Phoenix, Arizona State
Fairgrounds, San Tan Village Mall, Seville, Freestone Park, Downtown
Scottsdale, Fiesta Mall and Camelback Mountain.

This includes the following highways...
AZ Interstate 10 between mile markers 141 and 166.
AZ Interstate 17 between mile markers 195 and 203.
AZ Route 51 between mile markers 1 and 5.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3315 11182 3328 11200 3348 11217 3354 11203
      3353 11185 3346 11172 3333 11165 3317 11166
TIME...MOT...LOC 0915Z 170DEG 9KT 3327 11182

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

JS

Special weather statement, Aug 10, 4:27 AM MST, 40 minutes before

Special Weather Statement
National Weather Service Phoenix AZ
427 AM MST Tue Aug 10 2021

AZZ531-533-101215-
Kofa AZ-Central La Paz AZ-
427 AM MST Tue Aug 10 2021

...A strong thunderstorm will impact portions of central La Paz and
north central Yuma Counties through 515 AM MST...

At 426 AM MST, Doppler radar was tracking a strong thunderstorm near
Brenda, or 40 miles southeast of Parker, moving north at 5 mph. This
includes Interstate 10 and US 60.

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...
Kofa Wildlife Refuge and Brenda.

This includes the following highways...
AZ Interstate 10 between mile markers 26 and 45.
US Highway 60 between mile markers 31 and 47.
AZ Route 72 between mile markers 46 and 47.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3340 11382 3348 11421 3380 11405 3375 11374
TIME...MOT...LOC 1126Z 191DEG 5KT 3363 11394

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

AD

Special weather statement, Aug 10, 5:07 AM MST, 0 minutes before

Special Weather Statement
National Weather Service Phoenix AZ
507 AM MST Tue Aug 10 2021

AZZ533-101300-
Central La Paz AZ-
507 AM MST Tue Aug 10 2021

...A strong thunderstorm will impact portions of central La Paz
County through 600 AM MST...

At 507 AM MST, Doppler radar was tracking a strong thunderstorm near
Vicksburg Junction, or 38 miles southeast of Parker, moving northwest
at 5 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...
Salome, Vicksburg, Brenda, Vicksburg Junction, Harcuvar and Wenden.

This includes the following highways...
AZ Interstate 10 between mile markers 28 and 46.
US Highway 60 between mile markers 31 and 58.
AZ Route 72 between mile markers 33 and 49.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3382 11356 3367 11371 3347 11390 3358 11413
      3398 11387
TIME...MOT...LOC 1207Z 122DEG 5KT 3373 11383

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

AD

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 9, 5:24 PM MST	Areal Flood Advisory	PSR	La Paz	3 hr
Aug 9, 5:44 PM MST	Special Weather Statement	PSR	La Paz	46 min
Aug 9, 6:22 PM MST	Special Weather Statement	PSR		38 min
Aug 9, 10:11 PM MST	Special Weather Statement	PSR	Gila	34 min
Aug 9, 10:40 PM MST	Flash Flood Warning Considerable damage threat	PSR	Gila	4 hr
Aug 9, 11:51 PM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	8 hr
Aug 10, 1:40 AM MST	Special Weather Statement	PSR	Maricopa	50 min
Aug 10, 1:54 AM MST	Special Weather Statement	PSR	Maricopa	51 min
Aug 10, 2:15 AM MST	Special Weather Statement	PSR	Maricopa	45 min
Aug 10, 2:23 AM MST	Areal Flood Advisory	PSR	Maricopa, Pinal	2 hr
Aug 10, 4:27 AM MST	Special Weather Statement	PSR	La Paz	48 min
Aug 10, 5:09 AM MST	Areal Flood Advisory	PSR	La Paz	2 hr
Aug 10, 5:52 AM MST	Areal Flood Advisory	PSR	Maricopa, Pinal	5 hr
Aug 10, 6:21 AM MST	Special Weather Statement	PSR	La Paz	39 min
Aug 10, 7:39 AM MST	Areal Flood Advisory	PSR	Maricopa, Pinal	3 hr
Aug 10, 8:00 AM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	3 hr
Aug 10, 8:06 AM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	4 hr
Aug 10, 8:30 AM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa, Pinal	7 hr
Aug 10, 9:54 AM MST	Areal Flood Advisory	PSR	La Paz	3 hr
Aug 10, 3:05 PM MST	Areal Flood Warning	PSR	Maricopa, Pinal	7 hr
Aug 10, 4:43 PM MST	Special Weather Statement	PSR		62 min
Aug 10, 4:44 PM MST	Special Weather Statement	PSR		61 min
Aug 10, 4:56 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	49 min
Aug 9, 5:06 PM MST	Areal Flood Advisory	PSR	Riverside	3 hr
Aug 9, 6:09 PM MST	Areal Flood Advisory	PSR	Riverside, San Bernardino	115 min
Aug 10, 3:11 PM MST	Areal Flood Advisory	PSR	Riverside, San Bernardino	3 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.