Alert archive / Arizona / Special Weather Statements in 2021

Special Weather Statement, NWS Phoenix, AZ

August 30, 2021La Paz County, Arizona

NWS Phoenix, AZ issued this special weather statement at Aug 30, 2021, 3:04 PM MST for La Paz County, Arizona. It was in force for 26 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 30, 2021, 3:04 PM MST (22:04 UTC)
Expired: Aug 30, 2021, 3:30 PM MST
In force: 26 min
Issued by: NWS Phoenix, AZ
Hail: 0.25 in
Wind: 55

County La Paz County, AZ

The radar

The Yuma radar (KYUX), 139 km from the middle of the area, began a volume at 22:07 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, 10.1 hours before the alert went out and 224 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: 126 J/kg
Mixed-layer CIN: -355 J/kg
Mixed-layer LCL: 2569 m above ground
0-6 km bulk shear: 3 kt
0-1 km storm-relative helicity: -25 m²/s²
0-3 km storm-relative helicity: 59 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 30, 1:50 PM MST, 1 hour 14 minutes earlier.

Area forecast discussion, Aug 30, 1:50 PM MST, 1 hour 14 minutes before

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In the hours before

Special weather statement, Aug 30, 1:41 PM MST, 1 hour 23 minutes before

Special Weather Statement
National Weather Service Phoenix AZ
141 PM MST Mon Aug 30 2021

AZZ531-533-302115-
Kofa AZ-Central La Paz AZ-
141 PM MST Mon Aug 30 2021

...A strong thunderstorm will impact portions of central La Paz and
north central Yuma Counties through 215 PM MST...

At 140 PM MST, Doppler radar was tracking a strong thunderstorm over
Kofa Wildlife Refuge, or 45 miles south of Parker, moving northwest
at 15 mph.

HAZARD...Wind gusts of 50 to 55 mph and half inch 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...
Quartzsite, Kofa Wildlife Refuge and Brenda.

This includes the following highways...
AZ Interstate 10 between mile markers 18 and 42.
US Highway 60 between mile markers 31 and 37.
AZ Route 95 between mile markers 91 and 112.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

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 3368 11381 3336 11382 3348 11430 3372 11422
TIME...MOT...LOC 2040Z 115DEG 11KT 3351 11399

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...55 MPH

INS

Special weather statement, Aug 30, 3:04 PM MST, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 29, 5:05 PM MST	Special Weather Statement	PSR		25 min
Aug 29, 5:23 PM MST	Areal Flood Advisory	PSR	La Paz, Maricopa	2 hr
Aug 29, 6:07 PM MST	Special Weather Statement	PSR	Pinal	23 min
Aug 30, 12:42 AM MST	Areal Flood Advisory	PSR	Maricopa, Pinal	4 hr
Aug 30, 1:43 AM MST	Flash Flood Watch	PSR	Gila, La Paz, Maricopa, Pinal, Yuma	3 days
Aug 30, 1:41 PM MST	Special Weather Statement	PSR	La Paz	34 min
Aug 30, 1:55 PM MST	Severe Thunderstorm Warning	PSR	La Paz	50 min
Aug 30, 2:24 PM MST	Areal Flood Advisory	PSR	La Paz, Yuma	3 hr
Aug 30, 2:55 PM MST	Flash Flood Warning Considerable damage threat	PSR	La Paz	4 hr
Aug 30, 3:21 PM MST	Special Weather Statement	PSR		24 min
Aug 30, 3:32 PM MST	Special Weather Statement	PSR	La Paz	28 min
Aug 30, 3:47 PM MST	Dust Storm Advisory	PSR	La Paz	58 min
Aug 30, 4:48 PM MST	Special Weather Statement	PSR		42 min
Aug 30, 4:51 PM MST	Special Weather Statement	PSR	Gila	39 min
Aug 30, 4:56 PM MST	Dust Storm Advisory	PSR	Imperial, Riverside, San Bernardino	94 min

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.