Alert archive / Montana / Mesoscale Discussions in 2016

Mesoscale Discussion 1235

July 10, 20168 counties in Montana; 7 counties in North Dakota; Harding County, South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jul 10, 2016, 1:19 PM MDT for 8 counties in Montana; 7 counties in North Dakota; Harding County, South Dakota. It was in force for 86 min.

The area

The outline as issued.

The facts

Issued: Jul 10, 2016, 1:19 PM MDT (19:19 UTC)
Expired: Jul 10, 2016, 2:45 PM MDT
In force: 86 min
Issued by: the Storm Prediction Center
Chance of a watch: 80%

Counties Carter County, MT, Custer County, MT, Dawson County, MT, Fallon County, MT, Powder River County, MT, Prairie County, MT, Richland County, MT, Wibaux County, MT, Billings County, ND, Bowman County, ND, Dunn County, ND, Golden Valley County, ND, McKenzie County, ND, Slope County, ND, Stark County, ND, Harding County, SD

The radar

The Glasgow radar (KGGW), 243 km from the middle of the area, began a volume at 19:20 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Severe Thunderstorm Watch 368Jul 10, 1:45 PM MDT

The nearest sounding before it

Glasgow Intl Airport, MT (KGGW), launched 12:00Z, 7.3 hours before the alert went out and 243 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: 1594 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 35 m²/s²
0-3 km storm-relative helicity: 31 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 10, 1:48 PM MDT	Severe Thunderstorm Watch	SPC	Carter, Custer, Fallon, Powder River, Wibaux	7 hr
Jul 9, 7:32 PM MDT	Severe Thunderstorm Watch	SPC	Barnes, Burleigh, Cass, Dickey, Emmons, Foster and 15 more	5 hr
Jul 9, 9:44 PM MDT	Mesoscale Discussion	SPC	Barnes, Cass, Dickey, Emmons, Foster, Griggs and 9 more	91 min
Jul 10, 3:53 PM MDT	Mesoscale Discussion	SPC	Burleigh, Dickey, Eddy, Emmons, Foster, Grant and 12 more	67 min
Jul 10, 4:19 PM MDT	Severe Thunderstorm Watch	SPC	Barnes, Benson, Bottineau, Burke, Burleigh, Cavalier and 29 more	6 hr
Jul 9, 10:36 PM MDT	Severe Thunderstorm Watch	SPC	Clark, Codington, Day, Deuel, Grant, Hamlin and 2 more	5 hr
Jul 10, 12:23 AM MDT	Mesoscale Discussion	SPC	Grant, Roberts	2 hr
Jul 10, 2:06 PM MDT	Mesoscale Discussion	SPC	Bennett, Brule, Buffalo, Dewey, Gregory, Haakon and 11 more	84 min

Nearby

Mesoscale Discussions in Montana, 2016 Mesoscale Discussions in North Dakota, 2016 Mesoscale Discussions in South Dakota, 2016 Every mesoscale discussion in 2016

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.