Alert archive / North Dakota / Mesoscale Discussions in 2007

Mesoscale Discussion 1710

August 10, 200711 counties in North Dakota; 10 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Aug 10, 2007, 2:04 PM CDT for 11 counties in North Dakota; 10 counties in South Dakota. It was in force for 116 min.

The area

The outline as issued.

The facts

Issued: Aug 10, 2007, 2:04 PM CDT (19:04 UTC)
Expired: Aug 10, 2007, 4:00 PM CDT
In force: 116 min
Issued by: the Storm Prediction Center

All 21 counties

Burleigh County, ND, Dickey County, ND, Emmons County, ND, Grant County, ND, Kidder County, ND, LaMoure County, ND, Logan County, ND, McIntosh County, ND, Morton County, ND, Sioux County, ND, Stutsman County, ND, Campbell County, SD, Corson County, SD, Dewey County, SD, Edmunds County, SD, McPherson County, SD, Potter County, SD, Stanley County, SD, Sully County, SD, Walworth County, SD, Ziebach County, SD

The radar

The Bismarck radar (KBIS), 104 km from the middle of the area, began a volume at 19:05 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.

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 7.1 hours before the alert went out and 103 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: 1398 J/kg
Mixed-layer CIN: -392 J/kg
Mixed-layer LCL: 1454 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 84 m²/s²
0-3 km storm-relative helicity: 73 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.6

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 10, 2:33 PM CDT	Mesoscale Discussion	SPC	Nelson, Pembina, Walsh	87 min
Aug 10, 3:04 PM CDT	Severe Thunderstorm Watch	SPC	Barnes, Cass, Grand Forks, Griggs, Nelson, Steele and 2 more	7 hr
Aug 10, 3:41 PM CDT	Severe Thunderstorm Watch	SPC	Dickey, Emmons, Foster, Kidder, LaMoure, Logan and 4 more	8 hr
Aug 10, 4:57 PM CDT	Mesoscale Discussion	SPC	Divide, Golden Valley, Williams	2 hr
Aug 10, 5:45 PM CDT	Severe Thunderstorm Watch	SPC	Adams, Billings, Bottineau, Bowman, Burke, Burleigh and 20 more	9 hr
Aug 9, 8:18 PM CDT	Severe Thunderstorm Watch	SPC	Bon Homme, Yankton	4 hr
Aug 9, 9:33 PM CDT	Mesoscale Discussion	SPC	Aurora, Bon Homme, Charles Mix, Clay, Davison, Douglas and 5 more	87 min
Aug 9, 10:14 PM CDT	Severe Thunderstorm Watch	SPC	Clay, Union	6 hr
Aug 10, 1:45 AM CDT	Mesoscale Discussion	SPC	Aurora, Bon Homme, Brule, Charles Mix, Clay, Davison and 5 more	60 min
Aug 10, 4:25 AM CDT	Mesoscale Discussion	SPC	Aurora, Bon Homme, Brule, Buffalo, Charles Mix, Davison and 6 more	35 min
Aug 10, 10:45 AM CDT	Mesoscale Discussion	SPC	Aurora, Beadle, Bon Homme, Brule, Buffalo, Charles Mix and 18 more	90 min
Aug 10, 12:28 PM CDT	Severe Thunderstorm Watch	SPC	Bon Homme, Clay, Union, Yankton	5 hr
Aug 10, 4:33 PM CDT	Mesoscale Discussion	SPC	Bennett, Haakon, Jackson, Jones, Mellette, Stanley and 1 more	57 min
Aug 10, 5:03 PM CDT	Severe Thunderstorm Watch	SPC	Bennett, Haakon, Hughes, Jackson, Jones, Lyman and 6 more	6 hr

Nearby

Mesoscale Discussions in North Dakota, 2007 Mesoscale Discussions in South Dakota, 2007 Every mesoscale discussion in 2007

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.