Alert archive / Iowa / Mesoscale Discussions in 2004

Mesoscale Discussion 610

May 9, 20045 states

The Storm Prediction Center issued this mesoscale discussion at May 9, 2004, 1:22 AM CDT for 5 states. It was in force for 23 min.

The area

The outline as issued.

The facts

Issued
May 9, 2004, 1:22 AM CDT (06:22 UTC)
Expired
May 9, 2004, 1:45 AM CDT
In force
23 min
Issued by
the Storm Prediction Center
All 116 counties

Adair County, IA, Adams County, IA, Appanoose County, IA, Cass County, IA, Cedar County, IA, Clarke County, IA, Davis County, IA, Decatur County, IA, Des Moines County, IA, Fremont County, IA, Henry County, IA, Iowa County, IA, Jasper County, IA, Jefferson County, IA, Johnson County, IA, Keokuk County, IA, Lee County, IA, Louisa County, IA, Lucas County, IA, Madison County, IA, Mahaska County, IA, Marion County, IA, Mills County, IA, Monroe County, IA, Montgomery County, IA, Muscatine County, IA, Page County, IA, Poweshiek County, IA, Ringgold County, IA, Taylor County, IA, Union County, IA, Van Buren County, IA, Wapello County, IA, Warren County, IA, Washington County, IA, Wayne County, IA, Hancock County, IL, Atchison County, KS, Barton County, KS, Brown County, KS, Clay County, KS, Cloud County, KS, Dickinson County, KS, Doniphan County, KS, Ellis County, KS, Ellsworth County, KS, Geary County, KS, Jackson County, KS, Jefferson County, KS, Jewell County, KS, Leavenworth County, KS, Lincoln County, KS, Marshall County, KS, Mitchell County, KS, Nemaha County, KS, Osborne County, KS, Ottawa County, KS, Pawnee County, KS, Phillips County, KS, Pottawatomie County, KS, Republic County, KS, Riley County, KS, Rooks County, KS, Rush County, KS, Russell County, KS, Saline County, KS, Shawnee County, KS, Smith County, KS, Wabaunsee County, KS, Washington County, KS, Adair County, MO, Andrew County, MO, Atchison County, MO, Buchanan County, MO, Caldwell County, MO, Clark County, MO, Clinton County, MO, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Holt County, MO, Knox County, MO, Lewis County, MO, Linn County, MO, Livingston County, MO, Macon County, MO, Mercer County, MO, Nodaway County, MO, Platte County, MO, Putnam County, MO, Schuyler County, MO, Scotland County, MO, Sullivan County, MO, Worth County, MO, Adams County, NE, Cass County, NE, Clay County, NE, Fillmore County, NE, Franklin County, NE, Gage County, NE, Harlan County, NE, Jefferson County, NE, Johnson County, NE, Lancaster County, NE, Nemaha County, NE, Nuckolls County, NE, Otoe County, NE, Pawnee County, NE, Richardson County, NE, Saline County, NE, Sarpy County, NE, Seward County, NE, Thayer County, NE, Webster County, NE

The radar

The Omaha radar (KOAX), 111 km from the middle of the area, began a volume at 06:24 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, 6.4 hours before the alert went out and 111 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 2004-05-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2163 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 2004-05-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 20 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
2163 J/kg
Mixed-layer CIN
-22 J/kg
Mixed-layer LCL
2150 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
20 m²/s²
0-3 km storm-relative helicity
104 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 8, 9:55 PM CDTMesoscale DiscussionSPCBoone, Cook, Lake, McHenry, Stephenson, Winnebago2 hr
May 9, 11:48 AM CDTMesoscale DiscussionSPCBoone, Cook, DeKalb, DuPage, Kane, Lake and 4 more2 hr
May 9, 12:55 PM CDTSevere Thunderstorm WatchSPCCook, DuPage, Lake, Will6 hr
May 9, 2:46 PM CDTMesoscale DiscussionSPCCook, Lake89 min
May 9, 4:46 PM CDTMesoscale DiscussionSPCBoone, Bureau, Carroll, DeKalb, Grundy, Henry and 10 more59 min
May 9, 5:17 PM CDTMesoscale DiscussionSPCCook, DuPage, Lake, Will88 min
May 9, 6:50 PM CDTSevere Thunderstorm WatchSPCCook, DuPage, Grundy, Kankakee, Kendall, LaSalle and 3 more4 hr
May 8, 7:54 PM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Carroll, Cass, Clarke and 19 more2 hr
May 8, 8:25 PM CDTSevere Thunderstorm WatchSPCAdair, Adams, Allamakee, Appanoose, Audubon, Benton and 58 more6 hr
May 8, 10:44 PM CDTMesoscale DiscussionSPCAdair, Adams, Cass, Clarke, Decatur, Fremont and 12 more2 hr
May 9, 2:30 PM CDTSevere Thunderstorm WatchSPCLyon, Sioux6 hr
May 9, 5:38 PM CDTMesoscale DiscussionSPCDickinson, Emmet, Lyon, Osceola, Sioux2 hr
May 9, 2:42 PM CDTMesoscale DiscussionSPCCheyenne, Decatur, Greeley, Logan, Rawlins, Sherman and 3 more3 hr
May 9, 3:07 PM CDTMesoscale DiscussionSPCMorton, Stevens2 hr
May 9, 3:30 PM CDTSevere Thunderstorm WatchSPCDecatur, Gove, Graham, Logan, Norton, Phillips and 7 more6 hr
May 8, 9:17 PM CDTMesoscale DiscussionSPCBoyd88 min
May 9, 6:12 PM CDTMesoscale DiscussionSPCAdams, Antelope, Blaine, Boone, Buffalo, Butler and 37 more2 hr

Nearby

Mesoscale Discussions in Iowa, 2004Mesoscale Discussions in Kansas, 2004Mesoscale Discussions in Missouri, 2004Every mesoscale discussion in 2004

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.