Alert archive / Arizona / Special Weather Statements in 2021

Special Weather Statement, NWS Phoenix, AZ

August 29, 2021Yuma County, Arizona

NWS Phoenix, AZ issued this special weather statement at Aug 29, 2021, 6:51 AM MST for Yuma County, Arizona. It was in force for 39 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 29, 2021, 6:51 AM MST (13:51 UTC)
Expired: Aug 29, 2021, 7:30 AM MST
In force: 39 min
Issued by: NWS Phoenix, AZ
Hail: 0.00 in
Wind: 50

County Yuma County, AZ

The radar

The Yuma radar (KYUX), 37 km from the middle of the area, began a volume at 13:53 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

San Diego, CA (KNKX), launched 12:00Z, 1.9 hours before the alert went out and 267 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2595 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: -9 m²/s²
0-3 km storm-relative helicity: 35 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 29, 5:07 AM MST, 1 hour 44 minutes earlier.

Area forecast discussion, Aug 29, 5:07 AM MST, 1 hour 44 minutes before

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In the hours before

Local storm report, Aug 29, 1:05 AM MST, 5 hours 46 minutes before

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Special weather statement, Aug 29, 1:15 AM MST, 5 hours 36 minutes before

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Special weather statement, Aug 29, 5:35 AM MST, 1 hour 16 minutes before

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Special weather statement, Aug 29, 6:51 AM 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 28, 6:21 PM MST	Special Weather Statement	PSR		39 min
Aug 28, 6:48 PM MST	Dust Storm Warning	PSR	Pinal	42 min
Aug 28, 7:14 PM MST	Dust Storm Advisory	PSR	Maricopa, Pinal	31 min
Aug 29, 1:15 AM MST	Special Weather Statement	PSR	Yuma	45 min
Aug 29, 5:35 AM MST	Special Weather Statement	PSR		25 min
Aug 29, 7:27 AM MST	Special Weather Statement	PSR	Yuma	48 min
Aug 29, 8:18 AM MST	Special Weather Statement	PSR	Yuma	42 min
Aug 29, 8:22 AM MST	Areal Flood Advisory	PSR	Yuma	3 hr
Aug 29, 4:31 PM MST	Special Weather Statement	PSR		44 min
Aug 29, 4:49 PM MST	Areal Flood Advisory	PSR	Maricopa	3 hr
Aug 29, 1:14 PM MST	Special Weather Statement	PSR	Riverside	31 min
Aug 29, 3:30 PM MST	Special Weather Statement	PSR	Riverside	30 min
Aug 29, 4:01 PM MST	Special Weather Statement	PSR	Riverside	29 min
Aug 29, 4:29 PM MST	Flash Flood Warning Considerable damage threat	PSR	Riverside, San Bernardino	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.