Alert archive / North Dakota / Mesoscale Discussions in 2005

Mesoscale Discussion 1385

June 18, 20054 states

The Storm Prediction Center issued this mesoscale discussion at Jun 18, 2005, 8:16 PM MDT for 4 states. It was in force for 119 min.

The area

The outline as issued.

The facts

Issued: Jun 18, 2005, 8:16 PM MDT (02:16 UTC)
Expired: Jun 18, 2005, 10:15 PM MDT
In force: 119 min
Issued by: the Storm Prediction Center

All 30 counties

Big Horn County, MT, Carter County, MT, Custer County, MT, Fallon County, MT, Powder River County, MT, Wibaux County, MT, Adams County, ND, Billings County, ND, Bottineau County, ND, Bowman County, ND, Burleigh County, ND, Dunn County, ND, Golden Valley County, ND, Grant County, ND, Hettinger County, ND, McHenry County, ND, McKenzie County, ND, McLean County, ND, Mercer County, ND, Morton County, ND, Mountrail County, ND, Oliver County, ND, Pierce County, ND, Renville County, ND, Sheridan County, ND, Slope County, ND, Stark County, ND, Ward County, ND, Harding County, SD, Sheridan County, WY

The radar

The Bismarck radar (KBIS), 200 km from the middle of the area, began a volume at 02:16 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 497Jun 18, 9:10 PM MDT

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 2.3 hours before the alert went out and 205 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: 3392 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 1315 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 54 m²/s²
0-3 km storm-relative helicity: 79 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 4.3

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 18, 9:10 PM MDT	Severe Thunderstorm Watch	SPC	Carter, Fallon, Powder River, Wibaux	7 hr
Jun 19, 12:35 AM MDT	Mesoscale Discussion	SPC	Carter, Fallon, Powder River, Wibaux	85 min
Jun 19, 4:03 PM MDT	Mesoscale Discussion	SPC	Big Horn, Carter, Powder River	2 hr
Jun 19, 12:50 AM MDT	Severe Thunderstorm Watch	SPC	Adams, Benson, Bottineau, Burleigh, Emmons, Grant and 15 more	6 hr
Jun 19, 2:32 AM MDT	Mesoscale Discussion	SPC	McLean	88 min
Jun 19, 4:07 AM MDT	Mesoscale Discussion	SPC	Benson, Cavalier, Pembina, Ramsey, Towner, Walsh	83 min
Jun 19, 2:23 PM MDT	Mesoscale Discussion	SPC	Cass, Grand Forks, Griggs, Steele, Traill	97 min
Jun 19, 2:30 PM MDT	Severe Thunderstorm Watch	SPC	Barnes, Cass, Grand Forks, Griggs, Ransom, Richland and 3 more	8 hr
Jun 19, 2:57 PM MDT	Mesoscale Discussion	SPC	Dickey, Emmons, LaMoure, Logan, McIntosh, Sioux and 1 more	2 hr
Jun 19, 4:17 PM MDT	Mesoscale Discussion	SPC	Goshen, Laramie, Platte	118 min

Nearby

Mesoscale Discussions in North Dakota, 2005 Mesoscale Discussions in Montana, 2005 Mesoscale Discussions in South Dakota, 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; radar from the NEXRAD Level II archive.