Alert archive / Arizona / Mesoscale Discussions in 2007

Mesoscale Discussion 1612

July 29, 20074 counties in Arizona; 4 counties in New Mexico

The Storm Prediction Center issued this mesoscale discussion at Jul 29, 2007, 12:14 PM MST for 4 counties in Arizona; 4 counties in New Mexico. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued: Jul 29, 2007, 12:14 PM MST (19:14 UTC)
Expired: Jul 29, 2007, 2:45 PM MST
In force: 3 hr
Issued by: the Storm Prediction Center

Counties Cochise County, AZ, Graham County, AZ, Greenlee County, AZ, Santa Cruz County, AZ, Catron County, NM, Grant County, NM, Hidalgo County, NM, Luna County, NM

The radar

The Tucson radar (KEMX), 161 km from the middle of the area, began a volume at 19:15 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

Tuscon, AZ (KTUS), launched 12:00Z, 7.2 hours before the alert went out and 174 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: 316 J/kg
Mixed-layer CIN: -62 J/kg
Mixed-layer LCL: 1031 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 26 m²/s²
0-3 km storm-relative helicity: 15 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 28, 5:32 PM MST	Mesoscale Discussion	SPC	Maricopa	118 min

Nearby

Mesoscale Discussions in Arizona, 2007 Mesoscale Discussions in New Mexico, 2007 Every mesoscale discussion in 2007

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.