Alert archive / Minnesota / Mesoscale Discussions in 2004

Mesoscale Discussion 1826

August 2, 200418 counties in Minnesota; 13 counties in North Dakota

The Storm Prediction Center issued this mesoscale discussion at Aug 2, 2004, 12:53 AM CDT for 18 counties in Minnesota; 13 counties in North Dakota. It was in force for 97 min.

The area

The outline as issued.

The facts

Issued: Aug 2, 2004, 12:53 AM CDT (05:53 UTC)
Expired: Aug 2, 2004, 2:30 AM CDT
In force: 97 min
Issued by: the Storm Prediction Center

All 31 counties

Becker County, MN, Beltrami County, MN, Cass County, MN, Clay County, MN, Clearwater County, MN, Hubbard County, MN, Kittson County, MN, Lake of the Woods County, MN, Mahnomen County, MN, Marshall County, MN, Norman County, MN, Otter Tail County, MN, Pennington County, MN, Polk County, MN, Red Lake County, MN, Roseau County, MN, Wadena County, MN, Wilkin County, MN, Barnes County, ND, Cass County, ND, Cavalier County, ND, Grand Forks County, ND, Griggs County, ND, Nelson County, ND, Pembina County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND, Steele County, ND, Traill County, ND, Walsh County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 52 km from the middle of the area, began a volume at 05:52 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 685Aug 2, 3:00 AM CDT

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 5.9 hours before the alert went out and 318 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: 980 J/kg
Mixed-layer CIN: -49 J/kg
Mixed-layer LCL: 2136 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 66 m²/s²
0-3 km storm-relative helicity: 490 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 8.8

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
Aug 1, 7:22 PM CDT	Mesoscale Discussion	SPC	Big Stone, Lac qui Parle, Lincoln, Swift	53 min
Aug 2, 12:20 AM CDT	Severe Thunderstorm Watch	SPC	Murray, Nobles, Pipestone, Rock	4 hr
Aug 2, 3:00 AM CDT	Severe Thunderstorm Watch	SPC	Anoka, Becker, Benton, Clay, Douglas, Grant and 14 more	5 hr
Aug 2, 3:02 AM CDT	Mesoscale Discussion	SPC	Murray, Nobles, Rock	58 min
Aug 2, 5:17 AM CDT	Mesoscale Discussion	SPC	Anoka, Becker, Benton, Clay, Douglas, Grant and 14 more	88 min
Aug 2, 6:41 AM CDT	Mesoscale Discussion	SPC	Anoka, Becker, Benton, Clay, Douglas, Grant and 14 more	64 min
Aug 2, 3:12 PM CDT	Mesoscale Discussion	SPC	Blue Earth, Brown, Cottonwood, Dodge, Faribault, Freeborn and 18 more	2 hr
Aug 2, 3:50 PM CDT	Severe Thunderstorm Watch	SPC	Blue Earth, Brown, Cottonwood, Faribault, Freeborn, Jackson and 14 more	5 hr
Aug 1, 8:10 PM CDT	Mesoscale Discussion	SPC	Benson, Bottineau, Burleigh, Eddy, Foster, Kidder and 13 more	65 min

Nearby

Mesoscale Discussions in Minnesota, 2004 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.