Alert archive / Wyoming / Mesoscale Discussions in 2015

Mesoscale Discussion 1032

June 16, 2015Gallatin County, Madison County, Park County, Montana; 5 counties in Wyoming

The Storm Prediction Center issued this mesoscale discussion at Jun 16, 2015, 11:23 AM MDT for Gallatin County, Madison County, Park County, Montana; 5 counties in Wyoming. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jun 16, 2015, 11:23 AM MDT (17:23 UTC)
Expired: Jun 16, 2015, 1:30 PM MDT
In force: 2 hr
Issued by: the Storm Prediction Center
Chance of a watch: 20%

Counties Gallatin County, MT, Madison County, MT, Park County, MT, Fremont County, WY, Hot Springs County, WY, Park County, WY, Sublette County, WY, Teton County, WY

The radar

The Riverton/Lander radar (KRIW), 174 km from the middle of the area, began a volume at 17:25 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

Riverton, WY (KRIW), launched 12:00Z, 5.4 hours before the alert went out and 179 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: 1048 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 132 m²/s²
0-3 km storm-relative helicity: 155 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
Jun 16, 5:02 PM MDT	Mesoscale Discussion	SPC	Big Horn, Carbon, Golden Valley, Stillwater, Sweet Grass, Yellowstone	88 min
Jun 15, 7:29 PM MDT	Mesoscale Discussion	SPC	Albany, Carbon, Converse, Fremont, Goshen, Hot Springs and 10 more	91 min
Jun 16, 1:12 PM MDT	Mesoscale Discussion	SPC	Albany, Converse, Goshen, Laramie, Natrona, Niobrara and 1 more	2 hr
Jun 16, 2:02 PM MDT	Severe Thunderstorm Watch	SPC	Albany, Campbell, Carbon, Converse, Goshen, Laramie and 3 more	7 hr
Jun 16, 4:53 PM MDT	Mesoscale Discussion	SPC	Albany, Carbon, Converse, Fremont, Goshen, Laramie and 5 more	97 min

Nearby

Mesoscale Discussions in Wyoming, 2015 Mesoscale Discussions in Montana, 2015 Every 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.