Alert archive / North Dakota / Mesoscale Discussions in 2004

Mesoscale Discussion 2092

August 23, 200413 counties in North Dakota

The Storm Prediction Center issued this mesoscale discussion at Aug 23, 2004, 8:15 PM CDT for 13 counties in North Dakota. It was in force for 90 min.

The area

The outline as issued.

The facts

Issued: Aug 23, 2004, 8:15 PM CDT (01:15 UTC)
Expired: Aug 23, 2004, 9:45 PM CDT
In force: 90 min
Issued by: the Storm Prediction Center

Counties Benson County, ND, Burleigh County, ND, Eddy County, ND, Foster County, ND, Kidder County, ND, LaMoure County, ND, Logan County, ND, McHenry County, ND, McIntosh County, ND, Pierce County, ND, Sheridan County, ND, Stutsman County, ND, Wells County, ND

The radar

The Bismarck radar (KBIS), 97 km from the middle of the area, began a volume at 01:14 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 778Aug 23, 8:35 PM CDT

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 1.3 hours before the alert went out and 93 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: 1332 J/kg
Mixed-layer CIN: -97 J/kg
Mixed-layer LCL: 1245 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 126 m²/s²
0-3 km storm-relative helicity: 215 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 4.7

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
Aug 23, 8:35 PM CDT	Severe Thunderstorm Watch	SPC	Barnes, Benson, Bottineau, Burleigh, Cavalier, Dickey and 17 more	4 hr
Aug 23, 11:32 PM CDT	Mesoscale Discussion	SPC	Barnes, Griggs, LaMoure, Nelson, Steele, Stutsman	88 min

Nearby

Mesoscale Discussions in North Dakota, 2004 Every mesoscale discussion in 2004

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.