Alert archive / Arizona / Dust Storm Warnings in 2011

Dust Storm Warning 6, NWS Tucson, AZ

July 18, 2011Pinal County, Arizona

NWS Tucson, AZ issued this dust storm warning at Jul 18, 2011, 3:29 PM MST for Pinal County, Arizona. It was in force for 91 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 18, 2011, 3:29 PM MST (22:29 UTC)
Expired: Jul 18, 2011, 5:00 PM MST
In force: 91 min
Issued by: NWS Tucson, AZ

County Pinal County, AZ

The radar

The Phoenix radar (KIWA), 52 km from the middle of the area, began a volume at 22:30 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, 10.5 hours before the alert went out and 82 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: 18 J/kg
Mixed-layer CIN: -376 J/kg
Mixed-layer LCL: 2509 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 17 m²/s²
0-3 km storm-relative helicity: 37 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this dust storm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Tucson, AZ wrote its last area forecast discussion before this dust storm warning went out at Jul 18, 1:30 PM MST, 1 hour 59 minutes earlier.

Area forecast discussion, Jul 18, 1:30 PM MST, 1 hour 59 minutes before

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Hazardous weather outlook, Jul 18, 11:50 AM MST, 3 hours 39 minutes before

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In the hours before

Special weather statement, Jul 18, 1:28 PM MST, 2 hours 1 minute before

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Special weather statement, Jul 18, 1:40 PM MST, 1 hour 49 minutes before

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Special weather statement, Jul 18, 3:04 PM MST, 25 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 18, 1:10 PM MST	Areal Flood Advisory	TWC	Cochise	95 min
Jul 18, 1:28 PM MST	Special Weather Statement	TWC	Cochise	32 min
Jul 18, 1:40 PM MST	Special Weather Statement	TWC	Santa Cruz	35 min
Jul 18, 3:04 PM MST	Special Weather Statement	TWC		41 min

Nearby

Dust Storm Warnings in Arizona, 2011 Every dust storm warning in 2011

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.