Alert archive / South Dakota / Mesoscale Discussions in 2005

Mesoscale Discussion 1857

July 24, 20056 counties in Iowa; 6 counties in Minnesota; 16 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jul 24, 2005, 11:45 PM CDT for 6 counties in Iowa; 6 counties in Minnesota; 16 counties in South Dakota. It was in force for 60 min.

The area

The outline as issued.

The facts

Issued
Jul 24, 2005, 11:45 PM CDT (04:45 UTC)
Expired
Jul 25, 2005, 12:45 AM CDT
In force
60 min
Issued by
the Storm Prediction Center
All 28 counties

Clay County, IA, Dickinson County, IA, Lyon County, IA, O'Brien County, IA, Osceola County, IA, Sioux County, IA, Cottonwood County, MN, Jackson County, MN, Murray County, MN, Nobles County, MN, Pipestone County, MN, Rock County, MN, Bon Homme County, SD, Clay County, SD, Davison County, SD, Douglas 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, Sanborn County, SD, Turner County, SD, Union County, SD, Yankton County, SD

The radar

The Sioux Falls radar (KFSD), 26 km from the middle of the area, began a volume at 04:45 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, 4.8 hours before the alert went out and 182 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 2005-07-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1709 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 2005-07-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -7 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
1709 J/kg
Mixed-layer CIN
-86 J/kg
Mixed-layer LCL
1581 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
-7 m²/s²
0-3 km storm-relative helicity
33 m²/s²
Significant tornado parameter
-0.0
Supercell composite
-0.3

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 24, 8:20 PM CDTSevere Thunderstorm WatchSPCBlack Hawk, Bremer, Buchanan, Chickasaw, Clayton, Delaware and 2 more5 hr
Jul 24, 8:26 PM CDTMesoscale DiscussionSPCBoone, Buena Vista, Butler, Calhoun, Carroll, Cerro Gordo and 19 more94 min
Jul 24, 9:45 PM CDTSevere Thunderstorm WatchSPCClay, Dickinson, Lyon, O'Brien, Osceola, Sioux5 hr
Jul 24, 11:11 PM CDTMesoscale DiscussionSPCDubuque64 min
Jul 25, 10:05 AM CDTSevere Thunderstorm WatchSPCCedar, Clinton, Des Moines, Henry, Jackson, Johnson and 7 more7 hr
Jul 25, 1:31 PM CDTMesoscale DiscussionSPCCedar, Clinton, Des Moines, Dubuque, Henry, Jackson and 7 more89 min
Jul 25, 1:55 PM CDTMesoscale DiscussionSPCBlack Hawk, Bremer, Buena Vista, Butler, Calhoun, Cerro Gordo and 32 more2 hr
Jul 25, 3:30 PM CDTTornado WatchSPCBremer, Buena Vista, Butler, Cerro Gordo, Cherokee, Chickasaw and 19 more7 hr
Jul 25, 4:40 PM CDTTornado WatchSPCAllamakee, Clayton, Fayette, Winneshiek7 hr
Jul 25, 4:53 PM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Boone, Calhoun, Carroll and 20 more67 min
Jul 25, 5:25 PM CDTSevere Thunderstorm WatchSPCAdair, Adams, Audubon, Boone, Calhoun, Carroll and 17 more4 hr
Jul 25, 6:56 PM CDTMesoscale DiscussionSPCAllamakee, Bremer, Buena Vista, Butler, Cerro Gordo, Cherokee and 18 more94 min
Jul 25, 4:22 PM CDTMesoscale DiscussionSPCWinona23 min
Jul 24, 7:13 PM CDTMesoscale DiscussionSPCButte, Harding, Lawrence, Meade, Perkins2 hr
Jul 24, 9:53 PM CDTMesoscale DiscussionSPCBennett, Custer, Fall River, Jackson, Oglala Lakota, Pennington67 min
Jul 24, 10:00 PM CDTSevere Thunderstorm WatchSPCBennett, Custer, Fall River, Haakon, Jackson, Lawrence and 2 more4 hr
Jul 24, 11:23 PM CDTMesoscale DiscussionSPCBennett, Custer, Fall River, Haakon, Jackson, Lawrence and 2 more67 min
Jul 25, 2:39 AM CDTMesoscale DiscussionSPCButte, Corson, Harding, Perkins2 hr

Nearby

Mesoscale Discussions in South Dakota, 2005Mesoscale Discussions in Iowa, 2005Mesoscale Discussions in Minnesota, 2005Every mesoscale discussion in 2005

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.