Alert archive / North Dakota / Mesoscale Discussions in 2005

Mesoscale Discussion 1763

July 17, 20054 counties in Montana; 18 counties in North Dakota; Harding County, South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jul 17, 2005, 12:10 AM MDT for 4 counties in Montana; 18 counties in North Dakota; Harding County, South Dakota. It was in force for 65 min.

The area

The outline as issued.

The facts

Issued: Jul 17, 2005, 12:10 AM MDT (06:10 UTC)
Expired: Jul 17, 2005, 1:15 AM MDT
In force: 65 min
Issued by: the Storm Prediction Center

All 23 counties

Carter County, MT, Fallon County, MT, Powder River County, MT, Wibaux County, MT, Adams County, ND, Billings County, ND, Bowman County, ND, Dunn County, ND, Golden Valley County, ND, Grant County, ND, Hettinger County, ND, McHenry County, ND, McLean County, ND, Mercer County, ND, Morton County, ND, Mountrail County, ND, Oliver County, ND, Pierce County, ND, Sheridan County, ND, Slope County, ND, Stark County, ND, Ward County, ND, Harding County, SD

The radar

The Bismarck radar (KBIS), 177 km from the middle of the area, began a volume at 06:12 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, 6.2 hours before the alert went out and 181 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: 2375 J/kg
Mixed-layer CIN: -104 J/kg
Mixed-layer LCL: 2709 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 157 m²/s²
0-3 km storm-relative helicity: 348 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 7.7

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
Jul 16, 6:15 PM MDT	Severe Thunderstorm Watch	SPC	Dawson, McCone, Richland, Roosevelt, Sheridan, Valley	4 hr
Jul 16, 8:34 PM MDT	Mesoscale Discussion	SPC	Benson, Cavalier, Grand Forks, Nelson, Pembina, Ramsey and 1 more	86 min
Jul 16, 9:45 PM MDT	Severe Thunderstorm Watch	SPC	Benson, Billings, Cavalier, Dunn, Eddy, Golden Valley and 17 more	3 hr
Jul 17, 10:52 AM MDT	Mesoscale Discussion	SPC	Brookings, Deuel, Grant, Lake, McCook, Minnehaha and 1 more	113 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.