Alert archive / North Dakota / Mesoscale Discussions in 2005

Mesoscale Discussion 762

May 7, 20059 counties in North Dakota; 6 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at May 7, 2005, 6:47 PM CDT for 9 counties in North Dakota; 6 counties in South Dakota. It was in force for 118 min.

The area

The outline as issued.

The facts

Issued: May 7, 2005, 6:47 PM CDT (23:47 UTC)
Expired: May 7, 2005, 8:45 PM CDT
In force: 118 min
Issued by: the Storm Prediction Center

Counties Burleigh County, ND, Dickey County, ND, Emmons County, ND, Kidder County, ND, LaMoure County, ND, Logan County, ND, McIntosh County, ND, Sioux County, ND, Stutsman County, ND, Brown County, SD, Campbell County, SD, Edmunds County, SD, Faulk County, SD, McPherson County, SD, Walworth County, SD

The radar

The Bismarck radar (KBIS), 106 km from the middle of the area, began a volume at 23:50 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 228May 7, 7:55 PM CDT

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 11.8 hours before the alert went out and 102 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: 1691 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 51 m²/s²
0-3 km storm-relative helicity: 81 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
May 7, 3:25 PM CDT	Mesoscale Discussion	SPC	Emmons, McIntosh, Sioux	2 hr
May 7, 4:40 PM CDT	Severe Thunderstorm Watch	SPC	Burleigh, Dickey, Emmons, Kidder, LaMoure, Logan and 5 more	5 hr
May 6, 8:56 PM CDT	Mesoscale Discussion	SPC	Bennett, Todd	94 min
May 6, 11:36 PM CDT	Mesoscale Discussion	SPC	Lincoln, Minnehaha	54 min
May 7, 12:23 PM CDT	Mesoscale Discussion	SPC	Aurora, Brule, Buffalo, Charles Mix, Douglas, Gregory and 13 more	3 hr
May 7, 1:50 PM CDT	Severe Thunderstorm Watch	SPC	Aurora, Beadle, Brule, Buffalo, Charles Mix, Douglas and 9 more	7 hr
May 7, 5:02 PM CDT	Mesoscale Discussion	SPC	Clay, Lincoln, Minnehaha, Turner, Union, Yankton	118 min
May 7, 5:32 PM CDT	Mesoscale Discussion	SPC	Aurora, Beadle, Bon Homme, Brookings, Brown, Brule and 34 more	118 min

Nearby

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.