Alert archive / Missouri / Mesoscale Discussions in 2005

Mesoscale Discussion 815

May 11, 20055 states

The Storm Prediction Center issued this mesoscale discussion at May 11, 2005, 8:41 AM CDT for 5 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
May 11, 2005, 8:41 AM CDT (13:41 UTC)
Expired
May 11, 2005, 10:45 AM CDT
In force
2 hr
Issued by
the Storm Prediction Center
All 69 counties

Appanoose County, IA, Davis County, IA, Henry County, IA, Jefferson County, IA, Lee County, IA, Van Buren County, IA, Wayne County, IA, Adams County, IL, Hancock County, IL, Atchison County, KS, Brown County, KS, Clay County, KS, Doniphan County, KS, Douglas County, KS, Geary County, KS, Jackson County, KS, Jefferson County, KS, Johnson County, KS, Leavenworth County, KS, Marshall County, KS, Nemaha County, KS, Pottawatomie County, KS, Riley County, KS, Shawnee County, KS, Wabaunsee County, KS, Washington County, KS, Wyandotte County, KS, Adair County, MO, Andrew County, MO, Buchanan County, MO, Caldwell County, MO, Carroll County, MO, Chariton County, MO, Clark County, MO, Clay County, MO, Clinton County, MO, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Holt County, MO, Jackson County, MO, Knox County, MO, Lafayette County, MO, Lewis County, MO, Linn County, MO, Livingston County, MO, Macon County, MO, Marion County, MO, Mercer County, MO, Monroe County, MO, Nodaway County, MO, Platte County, MO, Putnam County, MO, Randolph County, MO, Ray County, MO, Saline County, MO, Schuyler County, MO, Scotland County, MO, Shelby County, MO, Sullivan County, MO, Worth County, MO, Gage County, NE, Jefferson County, NE, Johnson County, NE, Nemaha County, NE, Pawnee County, NE, Richardson County, NE

The radar

The Pleasant Hill radar (KEAX), 108 km from the middle of the area, began a volume at 13:45 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Topeka, KS (KTOP), launched 12:00Z, 1.7 hours before the alert went out and 143 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 12:00Z on 2005-05-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1968 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, Topeka, KS at 12:00Z on 2005-05-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 262 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
1968 J/kg
Mixed-layer CIN
-194 J/kg
Mixed-layer LCL
714 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
262 m²/s²
0-3 km storm-relative helicity
255 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.3

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
May 11, 3:11 AM CDTMesoscale DiscussionSPCBureau, Henry, Lee, Marshall, Mercer, Rock Island and 2 more2 hr
May 11, 1:37 PM CDTMesoscale DiscussionSPCAdams, Brown, Calhoun, Cass, Christian, Coles and 22 more113 min
May 11, 1:55 PM CDTSevere Thunderstorm WatchSPCAdams, Brown, Calhoun, Cass, Fulton, Greene and 11 more6 hr
May 11, 3:21 PM CDTMesoscale DiscussionSPCChampaign, Clark, Coles, Cumberland, DeWitt, Douglas and 4 more114 min
May 11, 6:28 PM CDTMesoscale DiscussionSPCChristian, Clark, Clay, Coles, Crawford, Cumberland and 13 more2 hr
May 10, 7:30 PM CDTMesoscale DiscussionSPCBenton, Black Hawk, Boone, Bremer, Buchanan, Butler and 26 more2 hr
May 10, 9:14 PM CDTMesoscale DiscussionSPCAudubon, Black Hawk, Boone, Bremer, Buena Vista, Butler and 33 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 10, 7:00 PM CDTSevere Thunderstorm WatchSPCCheyenne, Decatur, Norton, Phillips, Rawlins, Smith7 hr
May 11, 11:45 AM CDTTornado WatchSPCAtchison, Brown, Doniphan, Jackson, Jefferson, Leavenworth and 6 more7 hr
May 11, 2:36 PM CDTMesoscale DiscussionSPCCheyenne, Decatur, Ellis, Finney, Gove, Graham and 27 more114 min
May 11, 2:55 PM CDTTornado WatchSPCClay, Cloud, Dickinson, Ellis, Geary, Jewell and 11 more7 hr
May 11, 3:10 PM CDTTornado WatchSPCCheyenne, Clark, Decatur, Finney, Ford, Gove and 24 more7 hr
May 11, 3:41 PM CDTMesoscale DiscussionSPCAtchison, Brown, Doniphan, Jackson, Jefferson, Leavenworth and 4 more94 min
May 11, 4:50 PM CDTSevere Thunderstorm WatchSPCJohnson, Linn, Miami6 hr
May 11, 4:53 PM CDTMesoscale DiscussionSPCClay, Cloud, Dickinson, Ellis, Geary, Jewell and 11 more97 min
May 11, 5:13 PM CDTMesoscale DiscussionSPCCheyenne, Clark, Decatur, Finney, Ford, Gove and 24 more92 min
May 11, 5:25 PM CDTMesoscale DiscussionSPCAtchison, Brown, Doniphan, Douglas, Franklin, Jackson and 13 more2 hr
May 11, 6:45 PM CDTSevere Thunderstorm WatchSPCBrown, Jackson, Jefferson, Marshall, Nemaha, Pottawatomie and 1 more7 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

Nearby

Mesoscale Discussions in Missouri, 2005Mesoscale Discussions in Kansas, 2005Mesoscale Discussions in Iowa, 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.