Alert archive / South Dakota / Mesoscale Discussions in 2003

Mesoscale Discussion 1596

July 3, 20035 states

The Storm Prediction Center issued this mesoscale discussion at Jul 3, 2003, 8:11 PM CDT for 5 states. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued
Jul 3, 2003, 8:11 PM CDT (01:11 UTC)
Expired
Jul 3, 2003, 9:45 PM CDT
In force
94 min
Issued by
the Storm Prediction Center
All 89 counties

Buena Vista County, IA, Cherokee County, IA, Clay County, IA, Dickinson County, IA, Ida County, IA, Lyon County, IA, O'Brien County, IA, Osceola County, IA, Plymouth County, IA, Pocahontas County, IA, Sioux County, IA, Woodbury County, IA, Decatur County, KS, Osborne County, KS, Phillips County, KS, Smith County, KS, Jackson County, MN, Nobles County, MN, Rock County, MN, Adams County, NE, Arthur County, NE, Boone County, NE, Buffalo County, NE, Cedar County, NE, Cherry County, NE, Dakota County, NE, Dawes County, NE, Dixon County, NE, Franklin County, NE, Frontier County, NE, Furnas County, NE, Grant County, NE, Greeley County, NE, Hall County, NE, Harlan County, NE, Hooker County, NE, Howard County, NE, Kearney County, NE, Lincoln County, NE, Logan County, NE, McPherson County, NE, Phelps County, NE, Red Willow County, NE, Sheridan County, NE, Thomas County, NE, Thurston County, NE, Wayne County, NE, Webster County, NE, Aurora County, SD, Beadle County, SD, Bennett County, SD, Bon Homme County, SD, Brule County, SD, Buffalo County, SD, Charles Mix County, SD, Clay County, SD, Dewey County, SD, Douglas County, SD, Fall River County, SD, Faulk County, SD, Gregory County, SD, Haakon County, SD, Hand County, SD, Hanson County, SD, Hughes County, SD, Hutchinson County, SD, Hyde County, SD, Jackson County, SD, Jerauld County, SD, Jones County, SD, Lincoln County, SD, Lyman County, SD, McCook County, SD, Meade County, SD, Mellette County, SD, Minnehaha County, SD, Oglala Lakota County, SD, Pennington County, SD, Potter County, SD, Sanborn County, SD, Spink County, SD, Stanley County, SD, Sully County, SD, Todd County, SD, Tripp County, SD, Turner County, SD, Union County, SD, Yankton County, SD, Ziebach County, SD

The radar

The Sioux Falls radar (KFSD), 157 km from the middle of the area, began a volume at 01:13 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

Aberdeen, SD (KABR), launched 00:00Z, 1.2 hours before the alert went out and 227 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-pSkew-T log-p diagram, Aberdeen, SD at 00:00Z on 2003-07-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1927 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Aberdeen, SD at 00:00Z on 2003-07-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 33 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
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
1927 J/kg
Mixed-layer CIN
-22 J/kg
Mixed-layer LCL
1633 m above ground
0-6 km bulk shear
61 kt
0-1 km storm-relative helicity
33 m²/s²
0-3 km storm-relative helicity
201 m²/s²
Significant tornado parameter
0.3
Supercell composite
2.8

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.

IssuedProductOfficeCountiesLasted
Jul 3, 9:40 PM CDTSevere Thunderstorm WatchSPCBoone, Buena Vista, Calhoun, Carroll, Cherokee, Clay and 22 more6 hr
Jul 3, 11:23 PM CDTMesoscale DiscussionSPCAllamakee, Boone, Bremer, Buena Vista, Butler, Calhoun and 36 more97 min
Jul 4, 12:42 AM CDTMesoscale DiscussionSPCAllamakee, Black Hawk, Boone, Bremer, Butler, Calhoun and 24 more63 min
Jul 4, 1:15 AM CDTSevere Thunderstorm WatchSPCAllamakee, Benton, Black Hawk, Boone, Bremer, Buchanan and 34 more6 hr
Jul 4, 3:27 AM CDTMesoscale DiscussionSPCAllamakee, Benton, Black Hawk, Bremer, Buchanan, Cedar and 14 more93 min
Jul 4, 12:48 PM CDTMesoscale DiscussionSPCDes Moines, Henry117 min
Jul 3, 7:36 PM CDTMesoscale DiscussionSPCCheyenne, Rawlins, Sherman, Thomas54 min
Jul 4, 5:12 PM CDTMesoscale DiscussionSPCDecatur, Graham, Jewell, Norton, Osborne, Phillips and 5 more93 min
Jul 3, 10:22 PM CDTMesoscale DiscussionSPCBecker, Clay, Douglas, Grant, Hubbard, Otter Tail and 3 more23 min
Jul 3, 10:40 PM CDTSevere Thunderstorm WatchSPCAitkin, Becker, Carlton, Cass, Clay, Crow Wing and 14 more5 hr
Jul 4, 12:25 AM CDTMesoscale DiscussionSPCTraverse2 hr
Jul 4, 2:51 PM CDTMesoscale DiscussionSPCBanner, Box Butte, Dawes, Morrill, Scotts Bluff, Sheridan and 1 more114 min
Jul 4, 5:55 PM CDTMesoscale DiscussionSPCAntelope, Blaine, Brown, Cedar, Cherry, Garfield and 6 more95 min
Jul 4, 3:20 PM CDTSevere Thunderstorm WatchSPCBennett, Butte, Custer, Dewey, Fall River, Haakon and 14 more6 hr

Nearby

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