Alert archive / Iowa / Mesoscale Discussions in 2005

Mesoscale Discussion 1846

July 24, 20054 states

The Storm Prediction Center issued this mesoscale discussion at Jul 24, 2005, 10:33 AM CDT for 4 states. It was in force for 117 min.

The area

The outline as issued.

The facts

Issued
Jul 24, 2005, 10:33 AM CDT (15:33 UTC)
Expired
Jul 24, 2005, 12:30 PM CDT
In force
117 min
Issued by
the Storm Prediction Center
All 81 counties

Bremer County, IA, Buena Vista County, IA, Butler County, IA, Cerro Gordo County, IA, Cherokee County, IA, Chickasaw County, IA, Clay County, IA, Dickinson County, IA, Emmet County, IA, Fayette County, IA, Floyd County, IA, Franklin County, IA, Hancock County, IA, Howard County, IA, Humboldt County, IA, Ida County, IA, Kossuth County, IA, Lyon County, IA, Mitchell County, IA, O'Brien County, IA, Osceola County, IA, Palo Alto County, IA, Plymouth County, IA, Pocahontas County, IA, Sioux County, IA, Winnebago County, IA, Woodbury County, IA, Worth County, IA, Wright County, IA, Blue Earth County, MN, Brown County, MN, Cottonwood County, MN, Dodge County, MN, Faribault County, MN, Fillmore County, MN, Freeborn County, MN, Jackson County, MN, Le Sueur County, MN, Martin County, MN, Mower County, MN, Murray County, MN, Nicollet County, MN, Nobles County, MN, Olmsted County, MN, Pipestone County, MN, Rice County, MN, Rock County, MN, Steele County, MN, Waseca County, MN, Watonwan County, MN, Antelope County, NE, Blaine County, NE, Boyd County, NE, Cedar County, NE, Custer County, NE, Dakota County, NE, Dixon County, NE, Garfield County, NE, Holt County, NE, Knox County, NE, Logan County, NE, Loup County, NE, Madison County, NE, Pierce County, NE, Rock County, NE, Thurston County, NE, Wayne County, NE, Wheeler County, NE, Bon Homme County, SD, Charles Mix County, SD, Clay County, SD, Douglas County, SD, Hanson County, SD, Hutchinson 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), 81 km from the middle of the area, began a volume at 15:35 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

Omaha, NE (KOAX), launched 12:00Z, 3.6 hours before the alert went out and 180 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, Omaha, NE at 12:00Z on 2005-07-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 699 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, Omaha, NE at 12:00Z on 2005-07-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -42 square meters per square second.193958Sfc1 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
699 J/kg
Mixed-layer CIN
-380 J/kg
Mixed-layer LCL
1888 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
-42 m²/s²
0-3 km storm-relative helicity
31 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

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, 4:10 PM CDTMesoscale DiscussionSPCAudubon, Black Hawk, Boone, Bremer, Buchanan, Buena Vista and 36 more95 min
Jul 24, 4:50 PM CDTSevere Thunderstorm WatchSPCBoone, Buena Vista, Butler, Calhoun, Carroll, Cerro Gordo and 31 more5 hr
Jul 24, 6:26 PM CDTMesoscale DiscussionSPCAllamakee, Black Hawk, Bremer, Buchanan, Chickasaw, Clayton and 5 more64 min
Jul 23, 11:02 PM CDTMesoscale DiscussionSPCCarlton, Pine118 min
Jul 24, 3:30 AM CDTSevere Thunderstorm WatchSPCLincoln, Rock2 hr
Jul 24, 5:22 AM CDTMesoscale DiscussionSPCLincoln, Pipestone, Rock83 min
Jul 24, 3:14 AM CDTMesoscale DiscussionSPCAurora, Brule, Davison, Gregory, Jerauld, Kingsbury and 3 more91 min
Jul 24, 2:14 PM CDTMesoscale DiscussionSPCButte, Corson, Dewey, Haakon, Harding, Lawrence and 4 more2 hr
Jul 24, 2:50 PM CDTSevere Thunderstorm WatchSPCButte, Harding, Lawrence, Meade, Perkins7 hr

Nearby

Mesoscale Discussions in Iowa, 2005Mesoscale Discussions in Minnesota, 2005Mesoscale Discussions in Nebraska, 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.