Alert archive / Iowa / Mesoscale Discussions in 2005

Mesoscale Discussion 810

May 10, 200539 counties in Iowa; 16 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at May 10, 2005, 9:14 PM CDT for 39 counties in Iowa; 16 counties in Nebraska. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
May 10, 2005, 9:14 PM CDT (02:14 UTC)
Expired
May 10, 2005, 11:15 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
All 55 counties

Audubon County, IA, Black Hawk County, IA, Boone County, IA, Bremer County, IA, Buena Vista County, IA, Butler County, IA, Calhoun County, IA, Carroll County, IA, Cass County, IA, Cerro Gordo County, IA, Cherokee County, IA, Crawford County, IA, Dallas County, IA, Floyd County, IA, Franklin County, IA, Greene County, IA, Grundy County, IA, Guthrie County, IA, Hamilton County, IA, Hancock County, IA, Hardin County, IA, Harrison County, IA, Humboldt County, IA, Ida County, IA, Jasper County, IA, Marshall County, IA, Monona County, IA, Palo Alto County, IA, Pocahontas County, IA, Polk County, IA, Pottawattamie County, IA, Poweshiek County, IA, Sac County, IA, Shelby County, IA, Story County, IA, Tama County, IA, Webster County, IA, Woodbury County, IA, Wright County, IA, Burt County, NE, Butler County, NE, Colfax County, NE, Cuming County, NE, Dakota County, NE, Dodge County, NE, Douglas County, NE, Hamilton County, NE, Merrick County, NE, Platte County, NE, Polk County, NE, Saunders County, NE, Stanton County, NE, Thurston County, NE, Washington County, NE, York County, NE

The radar

The Des Moines radar (KDMX), 102 km from the middle of the area, began a volume at 02:18 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 00:00Z, 2.2 hours before the alert went out and 142 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 00:00Z on 2005-05-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2604 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 00:00Z on 2005-05-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 45 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
2604 J/kg
Mixed-layer CIN
-15 J/kg
Mixed-layer LCL
1952 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
45 m²/s²
0-3 km storm-relative helicity
124 m²/s²
Significant tornado parameter
0.0
Supercell composite
4.2

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 10, 7:30 PM CDTMesoscale DiscussionSPCBenton, Black Hawk, Boone, Bremer, Buchanan, Butler and 26 more2 hr
May 10, 9:54 PM CDTMesoscale DiscussionSPCAllamakee, Cerro Gordo, Chickasaw, Clay, Clayton, Dickinson and 15 more2 hr
May 10, 11:35 PM CDTMesoscale DiscussionSPCAdair, Audubon, Benton, Black Hawk, Boone, Bremer and 35 more85 min
May 11, 3:11 AM CDTMesoscale DiscussionSPCCedar, Clinton, Johnson, Louisa, Muscatine, Scott and 1 more2 hr
May 11, 8:41 AM CDTMesoscale DiscussionSPCAppanoose, Davis, Henry, Jefferson, Lee, Van Buren and 1 more2 hr
May 10, 7:00 PM CDTSevere Thunderstorm WatchSPCBuffalo, Chase, Dawson, Dundy, Franklin, Frontier and 9 more7 hr
May 11, 11:45 AM CDTTornado WatchSPCPawnee, Richardson7 hr
May 11, 2:36 PM CDTMesoscale DiscussionSPCDundy, Franklin, Furnas, Harlan, Hitchcock, Red Willow114 min
May 11, 2:55 PM CDTTornado WatchSPCAdams, Clay, Fillmore, Franklin, Gosper, Harlan and 7 more7 hr
May 11, 3:10 PM CDTTornado WatchSPCDundy, Hitchcock, Red Willow7 hr
May 11, 3:55 PM CDTSevere Thunderstorm WatchSPCAdams, Arthur, Boone, Buffalo, Butler, Chase and 34 more8 hr
May 11, 4:00 PM CDTMesoscale DiscussionSPCAntelope, Arthur, Blaine, Boone, Brown, Buffalo and 25 more2 hr
May 11, 4:53 PM CDTMesoscale DiscussionSPCAdams, Clay, Fillmore, Franklin, Gosper, Harlan and 7 more97 min
May 11, 5:13 PM CDTMesoscale DiscussionSPCDundy, Hitchcock, Red Willow92 min
May 11, 6:45 PM CDTSevere Thunderstorm WatchSPCGage, Johnson, Nemaha, Pawnee, Richardson7 hr

Nearby

Mesoscale Discussions in Iowa, 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.