Alert archive / Arizona / Special Weather Statements in 2019

Special Weather Statement, NWS Phoenix, AZ

August 7, 2019La Paz County, Arizona

NWS Phoenix, AZ issued this special weather statement at Aug 7, 2019, 12:33 PM MST for La Paz County, Arizona. It was in force for 42 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 7, 2019, 12:33 PM MST (19:33 UTC)
Expired: Aug 7, 2019, 1:15 PM MST
In force: 42 min
Issued by: NWS Phoenix, AZ

County La Paz County, AZ

The radar

The Yuma radar (KYUX), 100 km from the middle of the area, began a volume at 19:33 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, 7.6 hours before the alert went out and 203 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: 704 J/kg
Mixed-layer CIN: -168 J/kg
Mixed-layer LCL: 1864 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: 17 m²/s²
0-3 km storm-relative helicity: 40 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 7, 11:12 AM MST, 1 hour 21 minutes earlier.

Area forecast discussion, Aug 7, 11:12 AM MST, 1 hour 21 minutes before

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<head>
  <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.
      </p>
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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 7, 11:40 AM MST, 53 minutes before

Special Weather Statement
National Weather Service Phoenix AZ
1140 AM MST Wed Aug 7 2019

AZZ532-CAZ565-569-071930-
Yuma AZ-Imperial County Southeast CA-Palo Verde Valley CA-
1140 AM MST Wed Aug 7 2019

...SIGNIFICANT WEATHER ADVISORY FOR WESTERN YUMA AND SOUTHEASTERN
IMPERIAL COUNTIES UNTIL 1230 PM MST/1230 PM PDT/...

At 1139 AM MST/1139 AM PDT/, Doppler radar was tracking a strong
thunderstorm near Somerton, moving north at 30 mph.

Winds in excess of 40 mph and brief heavy rain will be possible with
this storm.

Locations impacted include...
Yuma, Somerton, Gadsden, Winterhaven and Andrade.

This includes CA Interstate 8 between mile markers 82 and 96.

LAT...LON 3255 11478 3257 11481 3258 11480 3262 11481
      3263 11478 3272 11472 3271 11487 3293 11488
      3291 11456 3254 11466
TIME...MOT...LOC 1839Z 185DEG 24KT 3263 11476

MP

Special weather statement, Aug 7, 12:22 PM MST, 11 minutes before

Special Weather Statement
National Weather Service Phoenix AZ
1222 PM MST Wed Aug 7 2019

AZZ558-560-072000-
San Carlos AZ-Pinal/Superstition Mountains AZ-
1222 PM MST Wed Aug 7 2019

...SIGNIFICANT WEATHER ADVISORY FOR GILA AND PINAL COUNTIES UNTIL 100
PM MST...

At 1221 PM MST, Doppler radar was tracking a strong thunderstorm near
Cutter, or 13 miles southeast of Globe, moving east at 25 mph.

Pea size hail, brief heavy rain, and winds in excess of 40 mph will
be possible with this storm.

Locations impacted include...
San Carlos, Cutter and San Carlos Reservoir.

This includes AZ Route 70 between mile markers 258 and 271.

LAT...LON 3339 11044 3335 11046 3329 11046 3321 11041
      3318 11047 3319 11050 3317 11053 3319 11069
      3336 11069 3341 11036
TIME...MOT...LOC 1921Z 267DEG 21KT 3328 11061

MP

Special weather statement, Aug 7, 12:32 PM MST, 1 minute before

Special Weather Statement
National Weather Service Phoenix AZ
1232 PM MST Wed Aug 7 2019

AZZ531-533-072015-
Kofa AZ-Central La Paz AZ-
1232 PM MST Wed Aug 7 2019

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL LA PAZ AND NORTHERN YUMA
COUNTIES UNTIL 115 PM MST...

At 1231 PM MST, Doppler radar was tracking a strong thunderstorm over
Kofa Wildlife Refuge, or 44 miles northeast of Martinez Lake, moving
north at 5 mph.

Pea size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Kofa Wildlife Refuge.

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.

&&

LAT...LON 3336 11391 3343 11411 3365 11406 3355 11376
TIME...MOT...LOC 1931Z 201DEG 5KT 3347 11398

Hernandez

Special weather statement, Aug 7, 12:33 PM MST, 0 minutes before

Special Weather Statement
National Weather Service Phoenix AZ
1233 PM MST Wed Aug 7 2019

AZZ531-072015-
Kofa AZ-
1233 PM MST Wed Aug 7 2019

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN LA PAZ AND NORTH
CENTRAL YUMA COUNTIES UNTIL 115 PM MST...

At 1233 PM MST, Doppler radar was tracking a strong thunderstorm 16
miles southwest of Kofa Wildlife Refuge, or 27 miles northeast of
Martinez Lake, moving northeast at 10 mph.

Pea size hail and winds in excess of 40 mph will be possible with
this storm.

This storm will remain over mainly rural areas of southwestern La Paz
and north central Yuma Counties.
This includes AZ Route 95 between mile markers 74 and 90.

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.

&&

LAT...LON 3318 11413 3324 11428 3346 11423 3336 11395
TIME...MOT...LOC 1933Z 205DEG 9KT 3329 11417

Hernandez

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 7, 11:40 AM MST	Special Weather Statement	PSR		50 min
Aug 7, 12:22 PM MST	Special Weather Statement	PSR		38 min
Aug 7, 12:32 PM MST	Special Weather Statement	PSR	La Paz	43 min
Aug 7, 12:36 PM MST	Special Weather Statement	PSR	Yuma	39 min
Aug 7, 12:56 PM MST	Special Weather Statement	PSR	La Paz	49 min
Aug 7, 1:18 PM MST	Severe Thunderstorm Warning	PSR	La Paz	27 min
Aug 7, 1:19 PM MST	Areal Flood Advisory	PSR	La Paz, Yuma	3 hr
Aug 7, 1:36 PM MST	Special Weather Statement	PSR	Gila	39 min
Aug 7, 1:38 PM MST	Flash Flood Warning	PSR	La Paz, Yuma	4 hr
Aug 7, 1:41 PM MST	Special Weather Statement	PSR	La Paz	49 min
Aug 7, 1:44 PM MST	Severe Thunderstorm Warning	PSR	La Paz	46 min
Aug 7, 1:48 PM MST	Special Weather Statement	PSR		42 min
Aug 7, 1:54 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	36 min
Aug 7, 2:02 PM MST	Areal Flood Advisory	PSR	Gila	3 hr
Aug 7, 2:11 PM MST	Special Weather Statement	PSR	La Paz	49 min
Aug 7, 2:12 PM MST	Areal Flood Advisory	PSR	Maricopa	2 hr
Aug 7, 2:25 PM MST	Flash Flood Warning	PSR	La Paz	4 hr
Aug 7, 2:44 PM MST	Flash Flood Warning	PSR	La Paz	4 hr
Aug 7, 2:44 PM MST	Special Weather Statement	PSR		46 min
Aug 7, 2:57 PM MST	Flash Flood Warning	PSR	La Paz, Maricopa	4 hr
Aug 7, 3:13 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	19 min
Aug 7, 3:58 PM MST	Dust Storm Advisory	PSR	Maricopa	62 min
Aug 7, 4:08 PM MST	Special Weather Statement	PSR	Maricopa	37 min
Aug 7, 4:14 PM MST	Special Weather Statement	PSR		31 min
Aug 7, 4:15 PM MST	Special Weather Statement	PSR	Maricopa	30 min
Aug 7, 4:28 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	17 min
Aug 7, 4:33 PM MST	Dust Storm Advisory	PSR	Maricopa	42 min
Aug 7, 4:47 PM MST	Special Weather Statement	PSR	Maricopa	43 min
Aug 7, 4:57 PM MST	Dust Storm Advisory	PSR	Maricopa, Pinal	48 min
Aug 7, 8:54 AM MST	Areal Flood Advisory	PSR	Imperial	3 hr

Nearby

Special Weather Statements in Arizona, 2019 Every special weather statement in 2019

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.