Alert archive / Nebraska / Mesoscale Discussions in 2003

Mesoscale Discussion 1891

July 18, 20035 states

The Storm Prediction Center issued this mesoscale discussion at Jul 18, 2003, 7:59 PM MDT for 5 states. It was in force for 61 min.

The area

The outline as issued.

The facts

Issued: Jul 18, 2003, 7:59 PM MDT (01:59 UTC)
Expired: Jul 18, 2003, 9:00 PM MDT
In force: 61 min
Issued by: the Storm Prediction Center

All 27 counties

Carter County, MT, Fallon County, MT, Adams County, ND, Bowman County, ND, Hettinger County, ND, Slope County, ND, Banner County, NE, Box Butte County, NE, Cheyenne County, NE, Dawes County, NE, Garden County, NE, Kimball County, NE, Morrill County, NE, Scotts Bluff County, NE, Sheridan County, NE, Sioux County, NE, Butte County, SD, Custer County, SD, Fall River County, SD, Harding County, SD, Lawrence County, SD, Meade County, SD, Oglala Lakota County, SD, Pennington County, SD, Perkins County, SD, Goshen County, WY, Niobrara County, WY

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 2.0 hours before the alert went out and 365 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: 691 J/kg
Mixed-layer CIN: -208 J/kg
Mixed-layer LCL: 2107 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 91 m²/s²
0-3 km storm-relative helicity: 200 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

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
Jul 19, 2:00 PM MDT	Mesoscale Discussion	SPC	Carter, Fallon, Powder River	2 hr
Jul 19, 5:02 PM MDT	Mesoscale Discussion	SPC	Big Horn, Carter, Custer, Dawson, Fallon, McCone and 5 more	118 min
Jul 19, 4:16 PM MDT	Mesoscale Discussion	SPC	Arthur, Blaine, Box Butte, Brown, Cherry, Cheyenne and 13 more	119 min
Jul 19, 4:00 PM MDT	Mesoscale Discussion	SPC	Cavalier, Grand Forks, Pembina, Traill, Walsh	90 min
Jul 19, 4:30 PM MDT	Severe Thunderstorm Watch	SPC	Benson, Bottineau, Cavalier, Eddy, Foster, Grand Forks and 13 more	6 hr

Nearby

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