Alert archive / North Dakota / Mesoscale Discussions in 2005

Mesoscale Discussion 1398

June 20, 20058 counties in North Dakota

The Storm Prediction Center issued this mesoscale discussion at Jun 20, 2005, 5:28 AM MDT for 8 counties in North Dakota. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued: Jun 20, 2005, 5:28 AM MDT (11:28 UTC)
Expired: Jun 20, 2005, 7:00 AM MDT
In force: 92 min
Issued by: the Storm Prediction Center

Counties Adams County, ND, Grant County, ND, Hettinger County, ND, Mercer County, ND, Morton County, ND, Oliver County, ND, Sioux County, ND, Stark County, ND

The radar

The Bismarck radar (KBIS), 125 km from the middle of the area, began a volume at 11:30 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 00:00Z, 11.5 hours before the alert went out and 130 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: 1635 J/kg
Mixed-layer CIN: -18 J/kg
Mixed-layer LCL: 1322 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: -26 m²/s²
0-3 km storm-relative helicity: 179 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 2.8

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 19, 6:02 PM MDT	Mesoscale Discussion	SPC	Barnes, Cass, LaMoure, Ransom, Steele, Traill	118 min
Jun 20, 1:17 AM MDT	Mesoscale Discussion	SPC	Adams, Billings, Bowman, Golden Valley, Grant, Hettinger and 4 more	58 min
Jun 20, 2:00 AM MDT	Severe Thunderstorm Watch	SPC	Adams, Billings, Bowman, Golden Valley, Grant, Hettinger and 5 more	5 hr
Jun 20, 3:40 AM MDT	Mesoscale Discussion	SPC	Adams, Billings, Bowman, Dickey, Emmons, Golden Valley and 11 more	95 min
Jun 20, 4:20 AM MDT	Severe Thunderstorm Watch	SPC	Barnes, Cass, Dickey, Emmons, LaMoure, Logan and 4 more	5 hr
Jun 20, 6:39 AM MDT	Mesoscale Discussion	SPC	Barnes, Cass, Dickey, LaMoure, Ransom, Richland and 2 more	96 min
Jun 20, 8:19 AM MDT	Mesoscale Discussion	SPC	Barnes, Cass, Dickey, LaMoure, Ransom, Richland and 2 more	56 min
Jun 20, 9:42 AM MDT	Mesoscale Discussion	SPC	Barnes, Cass, Dickey, LaMoure, Ransom, Richland and 2 more	63 min

Nearby

Mesoscale Discussions in North 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.