Alert archive / South Dakota / Mesoscale Discussions in 2003

Mesoscale Discussion 1494

June 24, 20034 states

The Storm Prediction Center issued this mesoscale discussion at Jun 24, 2003, 5:59 PM CDT for 4 states. It was in force for 61 min.

The area

The outline as issued.

The facts

Issued
Jun 24, 2003, 5:59 PM CDT (22:59 UTC)
Expired
Jun 24, 2003, 7:00 PM CDT
In force
61 min
Issued by
the Storm Prediction Center
All 48 counties

Lyon County, IA, O'Brien County, IA, Osceola County, IA, Plymouth County, IA, Sioux County, IA, Lincoln County, MN, Lyon County, MN, Murray County, MN, Nobles County, MN, Pipestone County, MN, Rock County, MN, Antelope County, NE, Blaine County, NE, Boyd County, NE, Brown County, NE, Cedar County, NE, Dixon County, NE, Garfield County, NE, Holt County, NE, Keya Paha County, NE, Knox County, NE, Logan County, NE, Loup County, NE, McPherson County, NE, Pierce County, NE, Rock County, NE, Thomas County, NE, Wheeler County, NE, Aurora County, SD, Bon Homme County, SD, Brookings County, SD, Charles Mix County, SD, Clay County, SD, Davison County, SD, Douglas County, SD, Gregory County, SD, Hanson County, SD, Hutchinson County, SD, Lake County, SD, Lincoln County, SD, McCook County, SD, Miner County, SD, Minnehaha County, SD, Moody County, SD, Tripp County, SD, Turner County, SD, Union County, SD, Yankton County, SD

The radar

The North Platte radar (KLNX), 160 km from the middle of the area, began a volume at 23:02 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

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 11.0 hours before the alert went out and 213 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, N. Platte/Lee Bi, NE at 12:00Z on 2003-06-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 413 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, N. Platte/Lee Bi, NE at 12:00Z on 2003-06-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 103 square meters per square second.19395878Sfc1 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
413 J/kg
Mixed-layer CIN
-377 J/kg
Mixed-layer LCL
1537 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
103 m²/s²
0-3 km storm-relative helicity
51 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.

IssuedProductOfficeCountiesLasted
Jun 23, 8:08 PM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Boone, Calhoun, Carroll and 28 more67 min
Jun 23, 8:55 PM CDTTornado WatchSPCAudubon, Buena Vista, Calhoun, Carroll, Cass, Cerro Gordo and 24 more4 hr
Jun 23, 9:10 PM CDTMesoscale DiscussionSPCCherokee, Dickinson, Lyon, O'Brien, Osceola, Sioux65 min
Jun 23, 10:38 PM CDTMesoscale DiscussionSPCBuena Vista, Calhoun, Cherokee, Clay, Humboldt, Ida and 9 more67 min
Jun 23, 10:50 PM CDTTornado WatchSPCPlymouth5 hr
Jun 23, 11:45 PM CDTSevere Thunderstorm WatchSPCLyon, O'Brien, Osceola, Sioux6 hr
Jun 24, 12:35 AM CDTSevere Thunderstorm WatchSPCBoone, Buena Vista, Calhoun, Carroll, Cerro Gordo, Cherokee and 24 more5 hr
Jun 24, 1:52 AM CDTMesoscale DiscussionSPCPlymouth53 min
Jun 24, 2:05 AM CDTSevere Thunderstorm WatchSPCAdair, Adams, Allamakee, Benton, Black Hawk, Boone and 39 more5 hr
Jun 24, 2:44 AM CDTMesoscale DiscussionSPCLyon, Osceola, Sioux2 hr
Jun 24, 3:09 AM CDTMesoscale DiscussionSPCBoone, Buena Vista, Calhoun, Carroll, Cerro Gordo, Cherokee and 12 more96 min
Jun 24, 11:43 AM CDTMesoscale DiscussionSPCAdams, Cass, Fremont, Harrison, Mills, Montgomery and 3 more2 hr
Jun 24, 2:15 PM CDTTornado WatchSPCCherokee, Lyon, O'Brien, Osceola, Plymouth, Sioux8 hr
Jun 24, 3:56 PM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Cass, Fremont, Guthrie and 6 more64 min
Jun 24, 5:25 PM CDTSevere Thunderstorm WatchSPCAdair, Audubon, Boone, Buena Vista, Butler, Calhoun and 30 more5 hr
Jun 24, 1:21 AM CDTMesoscale DiscussionSPCBig Stone, Lac qui Parle, Stevens, Yellow Medicine114 min
Jun 24, 4:20 PM CDTSevere Thunderstorm WatchSPCAitkin, Anoka, Benton, Big Stone, Carlton, Chippewa and 21 more6 hr
Jun 24, 5:00 PM CDTSevere Thunderstorm WatchSPCBlue Earth, Brown, Carver, Dakota, Dodge, Faribault and 18 more5 hr
Jun 23, 8:17 PM CDTMesoscale DiscussionSPCAdams, Antelope, Boone, Buffalo, Butler, Clay and 37 more58 min
Jun 23, 8:20 PM CDTTornado WatchSPCAdams, Buffalo, Clay, Fillmore, Franklin, Furnas and 11 more3 hr
Jun 23, 8:34 PM CDTMesoscale DiscussionSPCCheyenne, Deuel, Kimball86 min
Jun 23, 9:10 PM CDTTornado WatchSPCBanner, Box Butte, Cheyenne, Deuel, Garden, Kimball and 3 more4 hr
Jun 23, 10:50 PM CDTTornado WatchSPCArthur, Blaine, Chase, Custer, Dawson, Frontier and 10 more5 hr
Jun 23, 11:08 PM CDTMesoscale DiscussionSPCBanner, Box Butte, Cheyenne, Garden, Grant, Kimball and 3 more67 min
Jun 24, 12:50 AM CDTSevere Thunderstorm WatchSPCBanner, Cheyenne, Deuel, Garden, Kimball, Morrill and 1 more3 hr
Jun 24, 1:29 PM CDTMesoscale DiscussionSPCAntelope, Blaine, Boone, Boyd, Brown, Buffalo and 22 more3 hr
Jun 24, 3:47 PM CDTMesoscale DiscussionSPCChase, Dundy, Hayes, Hitchcock88 min
Jun 24, 3:55 PM CDTSevere Thunderstorm WatchSPCChase, Dawson, Dundy, Frontier, Furnas, Gosper and 3 more6 hr
Jun 24, 6:30 PM CDTMesoscale DiscussionSPCBuffalo, Dawson, Dundy, Frontier, Furnas, Gosper and 7 more2 hr
Jun 24, 6:28 PM CDTMesoscale DiscussionSPCBeadle, Brown, Buffalo, Campbell, Clark, Day and 18 more92 min

Nearby

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