Alert archive / Montana / Mesoscale Discussions in 2014

Mesoscale Discussion 1162

June 26, 201420 counties in Montana; 9 counties in North Dakota; 8 counties in Wyoming

The Storm Prediction Center issued this mesoscale discussion at Jun 26, 2014, 5:15 PM MDT for 20 counties in Montana; 9 counties in North Dakota; 8 counties in Wyoming. It was in force for 90 min.

The area

The outline as issued.

The facts

Issued: Jun 26, 2014, 5:15 PM MDT (23:15 UTC)
Expired: Jun 26, 2014, 6:45 PM MDT
In force: 90 min
Issued by: the Storm Prediction Center

All 37 counties

Big Horn County, MT, Carbon County, MT, Carter County, MT, Custer County, MT, Dawson County, MT, Fallon County, MT, Garfield County, MT, Golden Valley County, MT, McCone County, MT, Musselshell County, MT, Petroleum County, MT, Powder River County, MT, Prairie County, MT, Richland County, MT, Rosebud County, MT, Stillwater County, MT, Treasure County, MT, Valley County, MT, Wibaux County, MT, Yellowstone County, MT, Adams County, ND, Billings County, ND, Bowman County, ND, Dunn County, ND, Golden Valley County, ND, Hettinger County, ND, McKenzie County, ND, Slope County, ND, Stark County, ND, Big Horn County, WY, Campbell County, WY, Crook County, WY, Hot Springs County, WY, Johnson County, WY, Sheridan County, WY, Washakie County, WY, Weston County, WY

The radar

The Billings radar (KBLX), 205 km from the middle of the area, began a volume at 23:17 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

Rapid City, SD (KRAP), launched 12:00Z, 11.3 hours before the alert went out and 336 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: 1771 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 71 m²/s²
0-3 km storm-relative helicity: 138 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 26, 12:35 PM MDT	Mesoscale Discussion	SPC	Big Horn, Carter, Custer, Daniels, Dawson, Fallon and 13 more	115 min
Jun 26, 1:33 PM MDT	Severe Thunderstorm Watch	SPC	Big Horn, Carter, Custer, Dawson, Fallon, Garfield and 13 more	7 hr
Jun 25, 8:15 PM MDT	Mesoscale Discussion	SPC	Weston	90 min
Jun 26, 2:07 PM MDT	Mesoscale Discussion	SPC	Albany, Converse, Goshen, Laramie, Niobrara, Platte and 1 more	53 min
Jun 26, 3:01 PM MDT	Severe Thunderstorm Watch	SPC	Converse, Goshen, Laramie, Niobrara, Platte	8 hr
Jun 26, 5:48 PM MDT	Mesoscale Discussion	SPC	Goshen, Laramie, Niobrara	87 min

Nearby

Mesoscale Discussions in Montana, 2014 Mesoscale Discussions in North Dakota, 2014 Mesoscale Discussions in Wyoming, 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.