Alert archive / Minnesota / Mesoscale Discussions in 2005

Mesoscale Discussion 2071

August 25, 20059 counties in Minnesota; 5 counties in North Dakota; Brown County, Marshall County, Roberts County, South Dakota

The Storm Prediction Center issued this mesoscale discussion at Aug 25, 2005, 1:20 PM CDT for 9 counties in Minnesota; 5 counties in North Dakota; Brown County, Marshall County, Roberts County, South Dakota. It was in force for 115 min.

The area

The outline as issued.

The facts

Issued: Aug 25, 2005, 1:20 PM CDT (18:20 UTC)
Expired: Aug 25, 2005, 3:15 PM CDT
In force: 115 min
Issued by: the Storm Prediction Center

Counties Becker County, MN, Beltrami County, MN, Clay County, MN, Clearwater County, MN, Hubbard County, MN, Mahnomen County, MN, Norman County, MN, Otter Tail County, MN, Wilkin County, MN, Cass County, ND, Dickey County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND, Brown County, SD, Marshall County, SD, Roberts County, SD

The radar

The Fargo/Grand Forks radar (KMVX), 114 km from the middle of the area, began a volume at 18:23 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 745Aug 25, 3:45 PM CDT

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 6.3 hours before the alert went out and 234 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: 1435 J/kg
Mixed-layer CIN: -185 J/kg
Mixed-layer LCL: 511 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 41 m²/s²
0-3 km storm-relative helicity: 100 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
Aug 25, 3:45 PM CDT	Severe Thunderstorm Watch	SPC	Big Stone, Lac qui Parle, Stevens, Traverse	7 hr
Aug 25, 6:14 PM CDT	Mesoscale Discussion	SPC	Otter Tail, Todd, Wadena, Wilkin	61 min
Aug 25, 3:31 PM CDT	Mesoscale Discussion	SPC	Aurora, Beadle, Brule, Charles Mix, Clark, Codington and 14 more	59 min

Nearby

Mesoscale Discussions in Minnesota, 2005 Mesoscale Discussions in North Dakota, 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.