Alert archive / Arizona / Mesoscale Discussions in 2015

Mesoscale Discussion 1631

August 7, 20159 counties in Arizona; Hidalgo County, New Mexico

The Storm Prediction Center issued this mesoscale discussion at Aug 7, 2015, 12:01 PM MST for 9 counties in Arizona; Hidalgo County, New Mexico. It was in force for 89 min.

The area

The outline as issued.

The facts

Issued
Aug 7, 2015, 12:01 PM MST (19:01 UTC)
Expired
Aug 7, 2015, 1:30 PM MST
In force
89 min
Issued by
the Storm Prediction Center
Chance of a watch
20%

Counties Apache County, AZ, Cochise County, AZ, Gila County, AZ, Graham County, AZ, Greenlee County, AZ, Navajo County, AZ, Pima County, AZ, Pinal County, AZ, Santa Cruz County, AZ, Hidalgo County, NM

The radar

The Tucson radar (KEMX), 140 km from the middle of the area, began a volume at 19:01 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 12:00Z, 7.0 hours before the alert went out and 124 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-pSkew-T log-p diagram, Tuscon, AZ at 12:00Z on 2015-08-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 983 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tuscon, AZ at 12:00Z on 2015-08-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -16 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
983 J/kg
Mixed-layer CIN
-88 J/kg
Mixed-layer LCL
1639 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
-16 m²/s²
0-3 km storm-relative helicity
-12 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.

IssuedProductOfficeCountiesLasted
Aug 7, 11:27 AM MSTMesoscale DiscussionSPCCoconino2 hr

Nearby

Mesoscale Discussions in Arizona, 2015Mesoscale Discussions in New Mexico, 2015Every mesoscale discussion in 2015

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.