Alert archive / North Dakota / Mesoscale Discussions in 2009

Mesoscale Discussion 1302

June 24, 20094 counties in Montana; 12 counties in North Dakota; 5 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jun 24, 2009, 12:46 PM MDT for 4 counties in Montana; 12 counties in North Dakota; 5 counties in South Dakota. It was in force for 119 min.

The area

The outline as issued.

The facts

Issued: Jun 24, 2009, 12:46 PM MDT (18:46 UTC)
Expired: Jun 24, 2009, 2:45 PM MDT
In force: 119 min
Issued by: the Storm Prediction Center

All 21 counties

Dawson County, MT, Fallon County, MT, Richland County, MT, Wibaux County, MT, Adams County, ND, Billings County, ND, Bowman County, ND, Divide County, ND, Dunn County, ND, Golden Valley County, ND, Hettinger County, ND, McKenzie County, ND, Mountrail County, ND, Slope County, ND, Stark County, ND, Williams County, ND, Dewey County, SD, Harding County, SD, Perkins County, SD, Stanley County, SD, Ziebach County, SD

The radar

The Bismarck radar (KBIS), 191 km from the middle of the area, began a volume at 18:45 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

Bismarck Municip, ND (KBIS), launched 12:00Z, 6.8 hours before the alert went out and 196 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: 1910 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 21 m²/s²
0-3 km storm-relative helicity: 40 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 24, 6:14 AM MDT	Mesoscale Discussion	SPC	Corson, Dewey, Edmunds, Faulk, Hand, Hughes and 8 more	91 min
Jun 24, 1:12 PM MDT	Mesoscale Discussion	SPC	Beadle, Brookings, Clark, Codington, Day, Deuel and 12 more	93 min
Jun 24, 4:34 PM MDT	Mesoscale Discussion	SPC	Aurora, Beadle, Brookings, Brule, Buffalo, Haakon and 13 more	86 min
Jun 24, 5:16 PM MDT	Severe Thunderstorm Watch	SPC	Beadle, Brookings, Brown, Buffalo, Campbell, Clark and 24 more	6 hr

Nearby

Mesoscale Discussions in North Dakota, 2009 Mesoscale Discussions in South Dakota, 2009 Mesoscale Discussions in Montana, 2009 Every mesoscale discussion in 2009

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.