Alert archive / Iowa / Mesoscale Discussions in 2005

Mesoscale Discussion 545

April 10, 20055 states

The Storm Prediction Center issued this mesoscale discussion at Apr 10, 2005, 7:49 PM CDT for 5 states. It was in force for 56 min.

The area

The outline as issued.

The facts

Issued
Apr 10, 2005, 7:49 PM CDT (00:49 UTC)
Expired
Apr 10, 2005, 8:45 PM CDT
In force
56 min
Issued by
the Storm Prediction Center
All 69 counties

Adair County, IA, Adams County, IA, Audubon County, IA, Boone County, IA, Buena Vista County, IA, Calhoun County, IA, Carroll County, IA, Cass County, IA, Cherokee County, IA, Clay County, IA, Crawford County, IA, Dallas County, IA, Dickinson County, IA, Emmet County, IA, Franklin County, IA, Fremont County, IA, Greene County, IA, Guthrie County, IA, Hamilton County, IA, Hardin County, IA, Harrison County, IA, Humboldt County, IA, Ida County, IA, Kossuth County, IA, Lyon County, IA, Mills County, IA, Monona County, IA, Montgomery County, IA, O'Brien County, IA, Osceola County, IA, Page County, IA, Palo Alto County, IA, Plymouth County, IA, Pocahontas County, IA, Pottawattamie County, IA, Sac County, IA, Shelby County, IA, Sioux County, IA, Taylor County, IA, Webster County, IA, Woodbury County, IA, Wright County, IA, Jackson County, MN, Nobles County, MN, Atchison County, MO, Holt County, MO, Burt County, NE, Butler County, NE, Cass County, NE, Colfax County, NE, Cuming County, NE, Dakota County, NE, Dixon County, NE, Dodge County, NE, Douglas County, NE, Johnson County, NE, Lancaster County, NE, Nemaha County, NE, Otoe County, NE, Platte County, NE, Polk County, NE, Richardson County, NE, Sarpy County, NE, Saunders County, NE, Stanton County, NE, Thurston County, NE, Washington County, NE, Wayne County, NE, Union County, SD

The radar

The Omaha radar (KOAX), 80 km from the middle of the area, began a volume at 00:51 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

Topeka, KS (KTOP), launched 00:00Z, 0.8 hours before the alert went out and 287 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, Topeka, KS at 00:00Z on 2005-04-11Temperature 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, Topeka, KS at 00:00Z on 2005-04-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 125 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1404 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
125 m²/s²
0-3 km storm-relative helicity
94 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
Apr 11, 10:55 AM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Boone, Buena Vista, Calhoun and 18 more95 min
Apr 11, 11:55 AM CDTTornado WatchSPCAudubon, Carroll, Cass, Crawford, Fremont, Greene and 8 more8 hr
Apr 11, 5:01 PM CDTMesoscale DiscussionSPCAudubon, Carroll, Cass, Crawford, Fremont, Greene and 8 more59 min
Apr 10, 8:53 PM CDTMesoscale DiscussionSPCJasper, McDonald, Newton2 hr
Apr 10, 9:15 PM CDTSevere Thunderstorm WatchSPCBarry, Lawrence, McDonald, Newton, Stone7 hr
Apr 11, 1:23 AM CDTMesoscale DiscussionSPCBarry, McDonald, Newton, Stone67 min
Apr 11, 6:17 AM CDTMesoscale DiscussionSPCButler, Dunklin, Mississippi, New Madrid, Oregon, Pemiscot and 3 more118 min
Apr 11, 2:01 PM CDTMesoscale DiscussionSPCBarry, Barton, Bates, Cass, Cedar, Clay and 9 more89 min
Apr 11, 5:40 PM CDTSevere Thunderstorm WatchSPCBates, Buchanan, Caldwell, Cass, Clay, Clinton and 7 more4 hr

Nearby

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