Alert archive / South Dakota / Mesoscale Discussions in 2004

Mesoscale Discussion 220

March 26, 2004Carter County, Fallon County, Montana; 4 counties in North Dakota; 9 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Mar 26, 2004, 5:37 PM MST for Carter County, Fallon County, Montana; 4 counties in North Dakota; 9 counties in South Dakota. It was in force for 53 min.

The area

The outline as issued.

The facts

Issued: Mar 26, 2004, 5:37 PM MST (00:37 UTC)
Expired: Mar 26, 2004, 6:30 PM MST
In force: 53 min
Issued by: the Storm Prediction Center

Counties Carter County, MT, Fallon County, MT, Adams County, ND, Bowman County, ND, Golden Valley County, ND, Slope County, ND, Butte County, SD, Haakon County, SD, Harding County, SD, Jackson County, SD, Lawrence County, SD, Meade County, SD, Pennington County, SD, Perkins County, SD, Ziebach County, SD

The radar

The Rapid City radar (KUDX), 161 km from the middle of the area, began a volume at 00:41 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 33Mar 26, 6:35 PM MST

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 0.6 hours before the alert went out and 246 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1872 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 466 m²/s²
0-3 km storm-relative helicity: 715 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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
Mar 26, 6:35 PM MST	Severe Thunderstorm Watch	SPC	Fallon, Richland, Wibaux	5 hr
Mar 26, 8:35 PM MST	Mesoscale Discussion	SPC	Wibaux	55 min
Mar 26, 10:30 PM MST	Severe Thunderstorm Watch	SPC	Adams, Burleigh, Emmons, Grant, Hettinger, Morton and 1 more	6 hr
Mar 27, 12:18 AM MST	Mesoscale Discussion	SPC	Burleigh, Emmons, Grant, Morton, Sioux	87 min
Mar 27, 11:11 AM MST	Mesoscale Discussion	SPC	Clay, Union	3 hr

Nearby

Mesoscale Discussions in South Dakota, 2004 Mesoscale Discussions in North Dakota, 2004 Mesoscale Discussions in Montana, 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.