Alert archive / Iowa / Mesoscale Discussions in 2003

Mesoscale Discussion 1834

July 14, 20034 states

The Storm Prediction Center issued this mesoscale discussion at Jul 14, 2003, 1:52 PM CDT for 4 states. It was in force for 113 min.

The area

The outline as issued.

The facts

Issued: Jul 14, 2003, 1:52 PM CDT (18:52 UTC)
Expired: Jul 14, 2003, 3:45 PM CDT
In force: 113 min
Issued by: the Storm Prediction Center

All 59 counties

Audubon County, IA, Buena Vista County, IA, Carroll County, IA, Cherokee County, IA, Clay County, IA, Crawford County, IA, Dickinson County, IA, Emmet County, IA, Harrison County, IA, Ida County, IA, Lyon County, IA, Mills County, IA, Monona County, IA, Montgomery County, IA, O'Brien County, IA, Osceola County, IA, Palo Alto County, IA, Plymouth County, IA, Pocahontas County, IA, Pottawattamie County, IA, Sac County, IA, Shelby County, IA, Sioux County, IA, Woodbury County, IA, Jackson County, MN, Murray County, MN, Nobles County, MN, Pipestone County, MN, Rock County, MN, Boone County, NE, Burt County, NE, Butler County, NE, Cedar County, NE, Colfax County, NE, Cuming County, NE, Dakota County, NE, Dixon County, NE, Dodge County, NE, Douglas County, NE, Madison County, NE, Merrick County, NE, Nance County, NE, Pierce County, NE, Platte County, NE, Polk County, NE, Sarpy County, NE, Saunders County, NE, Stanton County, NE, Thurston County, NE, Washington County, NE, Wayne County, NE, Clay County, SD, Lincoln County, SD, McCook County, SD, Minnehaha County, SD, Moody County, SD, Turner County, SD, Union County, SD, Yankton County, SD

The radar

The Sioux Falls radar (KFSD), 80 km from the middle of the area, began a volume at 18:52 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.

Tornado Watch 745Jul 14, 3:45 PM CDT

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 6.9 hours before the alert went out and 326 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: -643 J/kg
Mixed-layer LCL: 1461 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 94 m²/s²
0-3 km storm-relative helicity: 122 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
Jul 14, 9:58 AM CDT	Mesoscale Discussion	SPC	Bremer, Buena Vista, Butler, Cerro Gordo, Cherokee, Chickasaw and 17 more	62 min
Jul 14, 3:45 PM CDT	Tornado Watch	SPC	Audubon, Boone, Buena Vista, Calhoun, Carroll, Cherokee and 23 more	6 hr
Jul 13, 9:40 PM CDT	Severe Thunderstorm Watch	SPC	Becker, Beltrami, Clay, Clearwater, Douglas, Grant and 9 more	5 hr
Jul 13, 11:02 PM CDT	Mesoscale Discussion	SPC	Becker, Clay, Hubbard, Mahnomen, Norman, Otter Tail and 2 more	58 min
Jul 14, 2:10 PM CDT	Mesoscale Discussion	SPC	Becker, Beltrami, Clearwater, Hubbard, Itasca, Kittson and 9 more	65 min
Jul 14, 2:35 PM CDT	Tornado Watch	SPC	Beltrami, Cass, Clearwater, Hubbard, Itasca, Kittson and 9 more	5 hr
Jul 14, 3:50 PM CDT	Mesoscale Discussion	SPC	Beltrami, Cass, Clearwater, Hubbard, Itasca, Kittson and 9 more	85 min
Jul 14, 3:57 PM CDT	Mesoscale Discussion	SPC	Aitkin, Benton, Big Stone, Crow Wing, Douglas, Grant and 9 more	2 hr
Jul 14, 5:05 PM CDT	Mesoscale Discussion	SPC	Aitkin, Anoka, Benton, Blue Earth, Brown, Carlton and 37 more	55 min
Jul 14, 5:25 PM CDT	Tornado Watch	SPC	Aitkin, Anoka, Benton, Brown, Carlton, Carver and 36 more	5 hr
Jul 14, 5:35 PM CDT	Tornado Watch	SPC	Cook, Lake, Saint Louis	4 hr
Jul 14, 5:55 PM CDT	Mesoscale Discussion	SPC	Itasca	2 hr
Jul 14, 6:49 PM CDT	Mesoscale Discussion	SPC	Blue Earth, Brown, Jackson, Martin, Nicollet, Watonwan	116 min
Jul 13, 8:20 PM CDT	Severe Thunderstorm Watch	SPC	Aurora, Beadle, Brown, Brule, Buffalo, Campbell and 22 more	5 hr
Jul 13, 10:36 PM CDT	Mesoscale Discussion	SPC	Brown, Clark, Day, Edmunds, Faulk, Spink	84 min
Jul 14, 12:39 AM CDT	Mesoscale Discussion	SPC	Brown, Clark, Codington, Day, Deuel, Grant and 4 more	36 min
Jul 14, 3:48 AM CDT	Mesoscale Discussion	SPC	Brown, Campbell, Day, Edmunds, Faulk, McPherson and 3 more	57 min

Nearby

Mesoscale Discussions in Iowa, 2003 Mesoscale Discussions in Nebraska, 2003 Mesoscale Discussions in South 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; radar from the NEXRAD Level II archive.