Alert archive / North Dakota / Mesoscale Discussions in 2003

Mesoscale Discussion 1441

June 21, 200323 counties in North Dakota; 20 counties in South Dakota; 6 counties in Wyoming

The Storm Prediction Center issued this mesoscale discussion at Jun 21, 2003, 12:14 PM MDT for 23 counties in North Dakota; 20 counties in South Dakota; 6 counties in Wyoming. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued: Jun 21, 2003, 12:14 PM MDT (18:14 UTC)
Expired: Jun 21, 2003, 2:45 PM MDT
In force: 3 hr
Issued by: the Storm Prediction Center

All 49 counties

Adams County, ND, Benson County, ND, Bottineau County, ND, Burleigh County, ND, Emmons County, ND, Grant County, ND, Hettinger County, ND, Kidder County, ND, Logan County, ND, McHenry County, ND, McIntosh County, ND, McLean County, ND, Mercer County, ND, Morton County, ND, Oliver County, ND, Pierce County, ND, Renville County, ND, Sheridan County, ND, Sioux County, ND, Stark County, ND, Towner County, ND, Ward County, ND, Wells County, ND, Butte County, SD, Campbell County, SD, Corson County, SD, Custer County, SD, Dewey County, SD, Fall River County, SD, Haakon County, SD, Harding County, SD, Hughes County, SD, Jackson County, SD, Lawrence County, SD, Meade County, SD, Oglala Lakota County, SD, Pennington County, SD, Perkins County, SD, Potter County, SD, Stanley County, SD, Sully County, SD, Walworth County, SD, Ziebach County, SD, Campbell County, WY, Converse County, WY, Crook County, WY, Johnson County, WY, Niobrara County, WY, Weston County, WY

The watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Rapid City, SD (KUNR), launched 12:00Z, 6.2 hours before the alert went out and 136 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: 34 J/kg
Mixed-layer CIN: -373 J/kg
Mixed-layer LCL: 2468 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: -11 m²/s²
0-3 km storm-relative helicity: -39 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
Jun 21, 1:45 PM MDT	Severe Thunderstorm Watch	SPC	Adams, Barnes, Benson, Billings, Bottineau, Bowman and 42 more	6 hr
Jun 21, 4:10 PM MDT	Mesoscale Discussion	SPC	Barnes, Benson, Burleigh, Cass, Eddy, Emmons and 25 more	95 min
Jun 21, 5:50 PM MDT	Severe Thunderstorm Watch	SPC	Barnes, Benson, Cass, Cavalier, Dickey, Eddy and 20 more	7 hr
Jun 20, 7:59 PM MDT	Mesoscale Discussion	SPC	Bennett, Todd	61 min
Jun 21, 1:10 PM MDT	Severe Thunderstorm Watch	SPC	Aurora, Bennett, Brule, Buffalo, Butte, Charles Mix and 23 more	7 hr
Jun 21, 2:03 PM MDT	Mesoscale Discussion	SPC	Brookings, Lincoln, Minnehaha, Moody	117 min
Jun 21, 3:52 PM MDT	Mesoscale Discussion	SPC	Aurora, Bennett, Brule, Buffalo, Butte, Charles Mix and 25 more	83 min

Nearby

Mesoscale Discussions in North Dakota, 2003 Mesoscale Discussions in South Dakota, 2003 Mesoscale Discussions in Wyoming, 2003 Every mesoscale discussion in 2003

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.