Alert archive / North Dakota / Mesoscale Discussions in 2005

Mesoscale Discussion 1520

June 28, 2005Richland County, Roosevelt County, Sheridan County, Montana; 9 counties in North Dakota

The Storm Prediction Center issued this mesoscale discussion at Jun 28, 2005, 11:09 AM MDT for Richland County, Roosevelt County, Sheridan County, Montana; 9 counties in North Dakota. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jun 28, 2005, 11:09 AM MDT (17:09 UTC)
Expired: Jun 28, 2005, 1:15 PM MDT
In force: 2 hr
Issued by: the Storm Prediction Center

Counties Richland County, MT, Roosevelt County, MT, Sheridan County, MT, Dunn County, ND, McHenry County, ND, McKenzie County, ND, McLean County, ND, Mercer County, ND, Mountrail County, ND, Renville County, ND, Ward County, ND, Williams County, ND

The watches that followed

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

Tornado Watch 546Jun 28, 1:30 PM MDT

The nearest sounding before it

Rapid City, SD (KUNR), launched 12:00Z, 5.2 hours before the alert went out and 450 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: 316 J/kg
Mixed-layer CIN: -447 J/kg
Mixed-layer LCL: 1145 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 190 m²/s²
0-3 km storm-relative helicity: 264 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

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 27, 6:30 PM MDT	Mesoscale Discussion	SPC	Big Horn, Blaine, Chouteau, Fergus, Golden Valley, Hill and 8 more	2 hr
Jun 28, 12:36 PM MDT	Mesoscale Discussion	SPC	Big Horn, Carbon, Golden Valley, Musselshell, Rosebud, Stillwater and 3 more	114 min
Jun 28, 1:30 PM MDT	Tornado Watch	SPC	Big Horn, Carter, Custer, Daniels, Dawson, Fallon and 15 more	7 hr
Jun 28, 5:49 PM MDT	Mesoscale Discussion	SPC	Big Horn, Carter, Custer, Daniels, Dawson, Fallon and 15 more	116 min
Jun 28, 2:45 PM MDT	Tornado Watch	SPC	Adams, Billings, Bowman, Golden Valley, Grant, Hettinger and 2 more	7 hr
Jun 28, 5:26 PM MDT	Mesoscale Discussion	SPC	Adams, Billings, Bowman, Golden Valley, Grant, Hettinger and 4 more	94 min

Nearby

Mesoscale Discussions in North Dakota, 2005 Mesoscale Discussions in Montana, 2005 Every mesoscale discussion in 2005

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.