Alert archive / Arizona / Dust Storm Warnings in 2017

Dust Storm Warning 1, NWS Phoenix, AZ

July 8, 2017La Paz County, Arizona

NWS Phoenix, AZ issued this dust storm warning at Jul 8, 2017, 8:16 PM MST for La Paz County, Arizona. It was in force for 99 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: Jul 8, 2017, 8:16 PM MST (03:16 UTC)
Expired: Jul 8, 2017, 9:55 PM MST
In force: 99 min
Issued by: NWS Phoenix, AZ

County La Paz County, AZ

The radar

The Yuma radar (KYUX), 151 km from the middle of the area, began a volume at 03:19 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, 3.3 hours before the alert went out and 189 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: 144 J/kg
Mixed-layer CIN: -149 J/kg
Mixed-layer LCL: 3453 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 38 m²/s²
0-3 km storm-relative helicity: 69 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this dust storm 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 dust storm warning went out at Jul 8, 3:02 PM MST, 5 hours 14 minutes earlier.

Area forecast discussion, Jul 8, 3:02 PM MST, 5 hours 14 minutes before

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In the hours before

Special weather statement, Jul 8, 4:47 PM MST, 3 hours 29 minutes before

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  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <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, Jul 8, 5:15 PM MST, 3 hours 1 minute before

Special Weather Statement
National Weather Service Phoenix AZ
515 PM MST SAT JUL 8 2017

AZZ553-090045-
Northwest Pinal County AZ-
515 PM MST SAT JUL 8 2017

...SIGNIFICANT WEATHER ADVISORY FOR PINAL COUNTY UNTIL 545 PM MST...

At 514 PM MST, Doppler radar was tracking a strong thunderstorm 7
miles southeast of Olberg, or 8 miles north of Casa Grande, moving
southwest at 10 mph.

Winds in excess of 40 mph will be possible with this storm.

Locations impacted include...
Casa Grande and Sacaton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Locally dense blowing dust is possible.  If you encounter blowing
dust while driving, pull over as far off the roadway as possible and
park. Turn off your headlights and keep your foot off the brake.

&&

LAT...LON 3311 11178 3298 11164 3281 11180 3304 11199
TIME...MOT...LOC 0014Z 051DEG 9KT 3301 11178

AD

Local storm report, Jul 8, 5:46 PM MST, 2 hours 30 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PHOENIX AZ
546 PM MST SAT JUL 8 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0415 PM     TSTM WND GST     10 ESE QUEEN CREEK      33.16N 111.49W
07/08/2017  M53 MPH          PINAL              AZ   MESONET

            MESONET STATION SRP22, 10 ESE QUEEN CREEK.

&&

ED

Local storm report, Jul 8, 6:28 PM MST, 1 hour 48 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PHOENIX AZ
628 PM MST SAT JUL 8 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0530 PM     TSTM WND GST     3 WNW CASA GRANDE       32.90N 111.79W
07/08/2017  M41 MPH          PINAL              AZ   MESONET

            MESONET STATION SRP14, 2 WNW CASA GRANDE.

&&

ED

Special weather statement, Jul 8, 6:42 PM MST, 1 hour 34 minutes before

Special Weather Statement
National Weather Service Phoenix AZ
642 PM MST SAT JUL 8 2017

AZZ533-090215-
Central La Paz AZ-
642 PM MST SAT JUL 8 2017

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN LA PAZ COUNTY UNTIL
715 PM MST...

At 641 PM MST, Doppler radar was tracking a strong thunderstorm over
Alamo State Park, or over Alamo Lake, moving southwest at 20 mph.
Boaters and others in the area should seek shelter.

Wind gusts of 50 to 55 mph will be possible with this storm.

Locations impacted include...
Alamo State Park.

LAT...LON 3430 11349 3424 11342 3409 11362 3422 11376
      3424 11373 3422 11372 3421 11367 3423 11364
      3423 11361 3431 11353
TIME...MOT...LOC 0141Z 057DEG 19KT 3429 11356

AD

Special weather statement, Jul 8, 7:50 PM MST, 26 minutes before

Special Weather Statement
National Weather Service Phoenix AZ
750 PM MST SAT JUL 8 2017

AZZ530-533-CAZ569-090315-
Parker Valley AZ-Central La Paz AZ-Palo Verde Valley CA-
750 PM MST SAT JUL 8 2017

...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN LA PAZ...SAN BERNARDINO
AND RIVERSIDE COUNTIES UNTIL 815 PM MST/815 PM PDT/...

At 749 PM MST/749 PM PDT/, Doppler radar was tracking strong
thunderstorms along a line extending from near Buckskin Mountain Park
to near Bouse to 6 miles northwest of Vicksburg. Movement was west at
35 mph.

Winds in excess of 40 mph will be possible with these storms.

Locations impacted include...
Parker, Brenda, Vicksburg Junction, Buckskin Mountain Park,
Vicksburg, Bouse, Harcuvar, Salome and Poston.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Locally dense blowing dust is possible.  If you encounter blowing
dust while driving, pull over as far off the roadway as possible and
park. Turn off your headlights and keep your foot off the brake.

&&

LAT...LON 3398 11391 3373 11355 3360 11397 3392 11445
      3408 11455 3408 11444 3411 11441 3414 11433
      3417 11429 3417 11425 3425 11417 3426 11410
TIME...MOT...LOC 0249Z 082DEG 30KT 3420 11414 3398 11399 3383 11378

AD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 8, 5:15 PM MST	Special Weather Statement	PSR	Pinal	30 min
Jul 8, 6:42 PM MST	Special Weather Statement	PSR		33 min
Jul 8, 7:10 PM MST	Blowing Dust Advisory	PSR	La Paz, Pinal, Yuma	3 hr
Jul 8, 7:50 PM MST	Special Weather Statement	PSR	La Paz	25 min
Jul 8, 8:20 PM MST	Special Weather Statement	PSR	La Paz	25 min
Jul 8, 8:30 PM MST	Severe Thunderstorm Warning	PSR	La Paz	30 min
Jul 8, 8:57 PM MST	Severe Thunderstorm Warning	PSR	La Paz	18 min
Jul 9, 11:44 AM MST	Blowing Dust Advisory	PSR	Maricopa, Pinal, Yuma	10 hr
Jul 9, 3:13 PM MST	Special Weather Statement	PSR		32 min
Jul 9, 4:10 PM MST	Special Weather Statement	PSR	Gila	50 min

Nearby

Dust Storm Warnings in Arizona, 2017 Every dust storm warning in 2017

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.