Alert archive / Arizona / Mesoscale Discussions in 2014

Mesoscale Discussion 1473

July 26, 20144 counties in Arizona

The Storm Prediction Center issued this mesoscale discussion at Jul 26, 2014, 5:39 PM MST for 4 counties in Arizona. It was in force for 96 min.

The area

The outline as issued.

The facts

Issued: Jul 26, 2014, 5:39 PM MST (00:39 UTC)
Expired: Jul 26, 2014, 7:15 PM MST
In force: 96 min
Issued by: the Storm Prediction Center
Chance of a watch: 20%

Counties Cochise County, AZ, Gila County, AZ, Graham County, AZ, Pinal County, AZ

The radar

The Tucson radar (KEMX), 115 km from the middle of the area, began a volume at 00:41 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 (KDMA), launched 00:00Z, 0.7 hours before the alert went out and 93 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: 577 J/kg
Mixed-layer CIN: -214 J/kg
Mixed-layer LCL: 2668 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: -76 m²/s²
0-3 km storm-relative helicity: 25 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 26, 11:47 PM MST	Mesoscale Discussion	SPC	Maricopa, Pima, Santa Cruz, Yavapai	88 min
Jul 27, 1:09 PM MST	Mesoscale Discussion	SPC	Apache, Gila, Graham, Greenlee, Navajo	66 min
Jul 27, 4:08 PM MST	Mesoscale Discussion	SPC	Cochise, Graham, Pima, Santa Cruz	67 min

Nearby

Mesoscale Discussions in Arizona, 2014 Every mesoscale discussion in 2014

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.