Alert archive / Iowa / Mesoscale Discussions in 2005

Mesoscale Discussion 753

May 6, 200529 counties in Iowa; 10 counties in Minnesota; Lincoln County, Minnehaha County, South Dakota

The Storm Prediction Center issued this mesoscale discussion at May 6, 2005, 11:36 PM CDT for 29 counties in Iowa; 10 counties in Minnesota; Lincoln County, Minnehaha County, South Dakota. It was in force for 54 min.

The area

The outline as issued.

The facts

Issued
May 6, 2005, 11:36 PM CDT (04:36 UTC)
Expired
May 7, 2005, 12:30 AM CDT
In force
54 min
Issued by
the Storm Prediction Center
All 41 counties

Black Hawk County, IA, Bremer County, IA, Buena Vista County, IA, Butler County, IA, Cerro Gordo County, IA, Chickasaw County, IA, Clay County, IA, Dickinson County, IA, Emmet County, IA, Floyd County, IA, Franklin County, IA, Grundy County, IA, Hamilton County, IA, Hancock County, IA, Hardin County, IA, Howard County, IA, Humboldt County, IA, Kossuth County, IA, Lyon County, IA, Mitchell County, IA, O'Brien County, IA, Osceola County, IA, Palo Alto County, IA, Pocahontas County, IA, Sioux County, IA, Webster County, IA, Winnebago County, IA, Worth County, IA, Wright County, IA, Cottonwood County, MN, Faribault County, MN, Freeborn County, MN, Jackson County, MN, Martin County, MN, Murray County, MN, Nobles County, MN, Pipestone County, MN, Rock County, MN, Watonwan County, MN, Lincoln County, SD, Minnehaha County, SD

The radar

The Sioux Falls radar (KFSD), 168 km from the middle of the area, began a volume at 04:38 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

Minneapolis, MN (KMPX), launched 00:00Z, 4.6 hours before the alert went out and 189 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, Minneapolis, MN at 00:00Z on 2005-05-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Minneapolis, MN at 00:00Z on 2005-05-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -13 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2600 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
-13 m²/s²
0-3 km storm-relative helicity
44 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
May 6, 7:54 PM CDTMesoscale DiscussionSPCJackson2 hr
May 7, 5:02 PM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Buena Vista, Calhoun, Carroll and 28 more118 min
May 6, 8:56 PM CDTMesoscale DiscussionSPCBennett, Todd94 min
May 7, 12:23 PM CDTMesoscale DiscussionSPCAurora, Brule, Buffalo, Charles Mix, Douglas, Gregory and 13 more3 hr
May 7, 1:50 PM CDTSevere Thunderstorm WatchSPCAurora, Beadle, Brule, Buffalo, Charles Mix, Douglas and 9 more7 hr
May 7, 3:25 PM CDTMesoscale DiscussionSPCBrown, Campbell, Corson, Dewey, Edmunds, Faulk and 4 more2 hr
May 7, 4:40 PM CDTSevere Thunderstorm WatchSPCCampbell, Corson, Dewey, Edmunds, Faulk, Hand and 5 more5 hr
May 7, 5:32 PM CDTMesoscale DiscussionSPCAurora, Beadle, Bon Homme, Brookings, Brown, Brule and 34 more118 min
May 7, 6:47 PM CDTMesoscale DiscussionSPCBrown, Campbell, Edmunds, Faulk, McPherson, Walworth118 min

Nearby

Mesoscale Discussions in Iowa, 2005Mesoscale Discussions in Minnesota, 2005Mesoscale Discussions in South Dakota, 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.