Alert archive / Arizona / Special Weather Statements in 2021

Special Weather Statement, NWS Phoenix, AZ

June 30, 2021La Paz County, Arizona

NWS Phoenix, AZ issued this special weather statement at Jun 30, 2021, 10:35 AM MST for La Paz County, Arizona. It was in force for 55 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, 10:35 AM MST (17:35 UTC)
Expired: Jun 30, 2021, 11:30 AM MST
In force: 55 min
Issued by: NWS Phoenix, AZ

County La Paz County, AZ

The radar

The Yuma radar (KYUX), 176 km from the middle of the area, began a volume at 17:38 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, 5.6 hours before the alert went out and 170 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, 4:36 AM MST, 5 hours 59 minutes earlier.

Area forecast discussion, Jun 30, 4:36 AM MST, 5 hours 59 minutes before

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In the hours before

Special weather statement, Jun 30, 8:35 AM MST, 2 hours before

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Special weather statement, Jun 30, 9:31 AM MST, 1 hour 4 minutes before

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Special weather statement, Jun 30, 10:35 AM MST, 0 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

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, 2:06 PM MST	Special Weather Statement	PSR	Pinal	24 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.