Alert archive / South Dakota / Mesoscale Discussions in 2003

Mesoscale Discussion 1436

June 20, 20037 counties in Nebraska; 8 counties in South Dakota; Crook County, Weston County, Wyoming

The Storm Prediction Center issued this mesoscale discussion at Jun 20, 2003, 5:45 PM MDT for 7 counties in Nebraska; 8 counties in South Dakota; Crook County, Weston County, Wyoming. It was in force for 60 min.

The area

The outline as issued.

The facts

Issued: Jun 20, 2003, 5:45 PM MDT (23:45 UTC)
Expired: Jun 20, 2003, 6:45 PM MDT
In force: 60 min
Issued by: the Storm Prediction Center

Counties Arthur County, NE, Dawes County, NE, Deuel County, NE, Garden County, NE, Grant County, NE, Keith County, NE, Sheridan County, NE, Bennett County, SD, Butte County, SD, Custer County, SD, Fall River County, SD, Lawrence County, SD, Meade County, SD, Oglala Lakota County, SD, Pennington County, SD, Crook County, WY, Weston County, WY

The nearest sounding before it

Rapid City, SD (KUNR), launched 12:00Z, 11.8 hours before the alert went out and 118 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: 2 J/kg
Mixed-layer CIN: -323 J/kg
Mixed-layer LCL: 1161 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: -31 m²/s²
0-3 km storm-relative helicity: 34 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 20, 1:41 PM MDT	Mesoscale Discussion	SPC	Banner, Box Butte, Dawes, Kimball, Morrill, Scotts Bluff and 1 more	2 hr
Jun 20, 2:25 PM MDT	Severe Thunderstorm Watch	SPC	Arthur, Banner, Box Butte, Cheyenne, Dawes, Deuel and 8 more	7 hr
Jun 20, 4:12 PM MDT	Mesoscale Discussion	SPC	Chase, Dawson, Dundy, Frontier, Furnas, Gosper and 4 more	63 min
Jun 20, 4:25 PM MDT	Tornado Watch	SPC	Chase, Dundy, Frontier, Hayes, Hitchcock, Lincoln and 2 more	6 hr
Jun 20, 3:25 PM MDT	Mesoscale Discussion	SPC	Harding	65 min
Jun 20, 11:36 AM MDT	Mesoscale Discussion	SPC	Park, Teton	114 min
Jun 20, 12:17 PM MDT	Mesoscale Discussion	SPC	Fremont, Hot Springs, Lincoln, Sublette, Sweetwater, Uinta	118 min

Nearby

Mesoscale Discussions in South Dakota, 2003 Mesoscale Discussions in Nebraska, 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.