Alert archive / Arizona / Special Weather Statements in 2021

Special Weather Statement, NWS Phoenix, AZ

June 30, 2021Pinal County, Arizona

NWS Phoenix, AZ issued this special weather statement at Jun 30, 2021, 2:06 PM MST for Pinal County, Arizona. It was in force for 24 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: Jun 30, 2021, 2:06 PM MST (21:06 UTC)
Expired: Jun 30, 2021, 2:30 PM MST
In force: 24 min
Issued by: NWS Phoenix, AZ

County Pinal County, AZ

The radar

The Phoenix radar (KIWA), 65 km from the middle of the area, began a volume at 21:09 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, 9.1 hours before the alert went out and 95 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: 301 J/kg
Mixed-layer CIN: -210 J/kg
Mixed-layer LCL: 2430 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: -54 m²/s²
0-3 km storm-relative helicity: 44 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 Jun 30, 1:41 PM MST, 25 minutes earlier.

Area forecast discussion, Jun 30, 1:41 PM MST, 25 minutes before

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In the hours before

Special weather statement, Jun 30, 8:35 AM MST, 5 hours 31 minutes before

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Special weather statement, Jun 30, 9:31 AM MST, 4 hours 35 minutes before

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Special weather statement, Jun 30, 10:35 AM MST, 3 hours 31 minutes before

Special Weather Statement
National Weather Service Phoenix AZ
1035 AM MST Wed Jun 30 2021

AZZ533-301830-
Central La Paz AZ-
1035 AM MST Wed Jun 30 2021

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN LA PAZ COUNTY UNTIL
1130 AM MST...

At 1035 AM MST, Doppler radar was tracking a strong thunderstorm 10
miles northwest of Harcuvar, or 26 miles south of Alamo Lake, moving
east at 30 mph.

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

Locations impacted include...
Salome, Vicksburg, Vicksburg Junction, Wenden and Harcuvar.

This includes the following highways...
AZ Interstate 10 between mile markers 47 and 51.
US Highway 60 between mile markers 40 and 72.
AZ Route 72 between mile markers 30 and 49.

LAT...LON 3378 11403 3418 11387 3425 11337 3367 11336
      3361 11371
TIME...MOT...LOC 1735Z 285DEG 24KT 3391 11374

Hirsch

Special weather statement, Jun 30, 2:06 PM MST, 0 minutes before

Special Weather Statement
National Weather Service Phoenix AZ
206 PM MST Wed Jun 30 2021

AZZ552-558-302130-
Superior AZ-Pinal/Superstition Mountains AZ-
206 PM MST Wed Jun 30 2021

...SIGNIFICANT WEATHER ADVISORY FOR GILA AND PINAL COUNTIES UNTIL 230
PM MST...

At 205 PM MST, Doppler radar was tracking a strong thunderstorm near
Top-Of-The-World, or near Superior. This storm was nearly stationary.

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

Locations impacted include...
Superior and Top-Of-The-World.

This includes the following highways...
US Highway 60 between mile markers 224 and 239.
AZ Route 177 between mile markers 165 and 167.

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.

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 3320 11091 3321 11093 3324 11095 3319 11103
      3330 11117 3340 11099 3329 11085
TIME...MOT...LOC 2105Z 042DEG 4KT 3330 11100

LJH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 30, 2:11 AM MST	Special Weather Statement	PSR	La Paz	19 min
Jun 30, 2:34 AM MST	Areal Flood Advisory	PSR	La Paz	116 min
Jun 30, 8:35 AM MST	Special Weather Statement	PSR	La Paz	55 min
Jun 30, 9:31 AM MST	Special Weather Statement	PSR	La Paz	59 min
Jun 30, 10:35 AM MST	Special Weather Statement	PSR	La Paz	55 min
Jun 30, 2:13 PM MST	Special Weather Statement	PSR	Gila	32 min
Jun 30, 4:08 PM MST	Flash Flood Warning Considerable damage threat	PSR	Gila, Maricopa	4 hr
Jun 30, 4:19 PM MST	Special Weather Statement	PSR	Gila	41 min
Jun 30, 4:21 PM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa, Pinal	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.