Alert archive / South Dakota / Mesoscale Discussions in 2003

Mesoscale Discussion 1466

June 23, 200311 counties in Nebraska; 27 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jun 23, 2003, 1:04 AM CDT for 11 counties in Nebraska; 27 counties in South Dakota. It was in force for 116 min.

The area

The outline as issued.

The facts

Issued
Jun 23, 2003, 1:04 AM CDT (06:04 UTC)
Expired
Jun 23, 2003, 3:00 AM CDT
In force
116 min
Issued by
the Storm Prediction Center
All 38 counties

Blaine County, NE, Boyd County, NE, Brown County, NE, Cedar County, NE, Cherry County, NE, Holt County, NE, Hooker County, NE, Keya Paha County, NE, Knox County, NE, Rock County, NE, Thomas County, NE, Aurora County, SD, Beadle County, SD, Bon Homme County, SD, Brule County, SD, Buffalo County, SD, Charles Mix County, SD, Clark County, SD, Clay County, SD, Davison County, SD, Douglas County, SD, Gregory County, SD, Hamlin County, SD, Hanson County, SD, Hutchinson County, SD, Jerauld County, SD, Kingsbury County, SD, Lake County, SD, Lincoln County, SD, McCook County, SD, Miner County, SD, Minnehaha County, SD, Moody County, SD, Sanborn County, SD, Tripp County, SD, Turner County, SD, Union County, SD, Yankton County, SD

The radar

The Sioux Falls radar (KFSD), 179 km from the middle of the area, began a volume at 06:03 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 nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 6.1 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 2003-06-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1749 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 2003-06-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 59 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
1749 J/kg
Mixed-layer CIN
-8 J/kg
Mixed-layer LCL
951 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
59 m²/s²
0-3 km storm-relative helicity
97 m²/s²
Significant tornado parameter
1.0
Supercell composite
5.4

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 22, 8:30 PM CDTTornado WatchSPCAdams, Antelope, Boone, Butler, Cedar, Clay and 31 more5 hr
Jun 22, 10:32 PM CDTMesoscale DiscussionSPCAdams, Boone, Butler, Clay, Colfax, Fillmore and 19 more88 min
Jun 22, 11:20 PM CDTSevere Thunderstorm WatchSPCAdams, Buffalo, Butler, Cass, Clay, Douglas and 24 more6 hr
Jun 23, 1:49 AM CDTMesoscale DiscussionSPCAdams, Buffalo, Clay, Fillmore, Franklin, Gage and 17 more116 min
Jun 23, 3:13 AM CDTMesoscale DiscussionSPCAntelope, Boone, Burt, Cedar, Colfax, Cuming and 17 more2 hr
Jun 23, 1:42 PM CDTMesoscale DiscussionSPCAntelope, Arthur, Blaine, Boone, Brown, Custer and 18 more3 hr
Jun 23, 5:35 PM CDTTornado WatchSPCAntelope, Arthur, Blaine, Boone, Boyd, Brown and 37 more5 hr
Jun 23, 6:00 PM CDTSevere Thunderstorm WatchSPCDundy, Hitchcock, Red Willow6 hr
Jun 23, 6:45 PM CDTTornado WatchSPCBoyd4 hr
Jun 22, 8:05 PM CDTMesoscale DiscussionSPCBrown, Clark, Codington, Day, Deuel, Edmunds and 6 more55 min
Jun 23, 10:16 AM CDTMesoscale DiscussionSPCGrant, Roberts119 min
Jun 23, 6:24 PM CDTMesoscale DiscussionSPCAurora, Brookings, Charles Mix, Codington, Davison, Deuel and 14 more66 min

Nearby

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