Alert archive / Iowa / Mesoscale Discussions in 2004

Mesoscale Discussion 1516

July 5, 20044 states

The Storm Prediction Center issued this mesoscale discussion at Jul 5, 2004, 4:45 AM CDT for 4 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jul 5, 2004, 4:45 AM CDT (09:45 UTC)
Expired
Jul 5, 2004, 6:45 AM CDT
In force
2 hr
Issued by
the Storm Prediction Center
All 79 counties

Adair County, IA, Adams County, IA, Appanoose County, IA, Audubon County, IA, Boone County, IA, Buena Vista County, IA, Calhoun County, IA, Carroll County, IA, Cass County, IA, Clarke County, IA, Crawford County, IA, Dallas County, IA, Davis County, IA, Decatur County, IA, Greene County, IA, Guthrie County, IA, Harrison County, IA, Ida County, IA, Lucas County, IA, Madison County, IA, Marion County, IA, Mills County, IA, Monona County, IA, Monroe County, IA, Montgomery County, IA, Page County, IA, Pocahontas County, IA, Polk County, IA, Pottawattamie County, IA, Ringgold County, IA, Sac County, IA, Shelby County, IA, Taylor County, IA, Union County, IA, Warren County, IA, Wayne County, IA, Johnson County, KS, Miami County, KS, Wyandotte County, KS, Adair County, MO, Andrew County, MO, Bates County, MO, Caldwell County, MO, Carroll County, MO, Cass County, MO, Chariton County, MO, Clay County, MO, Clinton County, MO, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Henry County, MO, Howard County, MO, Jackson County, MO, Johnson County, MO, Knox County, MO, Lafayette County, MO, Lewis County, MO, Linn County, MO, Livingston County, MO, Macon County, MO, Mercer County, MO, Nodaway County, MO, Pettis 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, Burt County, NE, Dodge County, NE, Douglas County, NE, Washington County, NE

The radar

The Pleasant Hill radar (KEAX), 128 km from the middle of the area, began a volume at 09:48 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 00:00Z, 9.8 hours before the alert went out and 136 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 2004-07-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 486 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 00:00Z on 2004-07-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 10 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
486 J/kg
Mixed-layer CIN
-310 J/kg
Mixed-layer LCL
2387 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
10 m²/s²
0-3 km storm-relative helicity
67 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
Jul 4, 11:05 PM CDTSevere Thunderstorm WatchSPCFremont, Mills5 hr
Jul 5, 1:16 AM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Boone, Buena Vista, Calhoun and 25 more89 min
Jul 5, 2:00 AM CDTSevere Thunderstorm WatchSPCAdair, Adams, Appanoose, Audubon, Boone, Calhoun and 31 more5 hr
Jul 5, 3:00 PM CDTMesoscale DiscussionSPCAppanoose, Clarke, Dallas, Davis, Decatur, Des Moines and 22 more60 min
Jul 5, 4:20 PM CDTTornado WatchSPCAllamakee, Appanoose, Benton, Black Hawk, Bremer, Buchanan and 51 more6 hr
Jul 5, 6:30 PM CDTMesoscale DiscussionSPCBenton, Black Hawk, Bremer, Buchanan, Butler, Cedar and 40 more60 min
Jul 4, 7:02 PM CDTMesoscale DiscussionSPCNorton, Phillips58 min
Jul 4, 7:12 PM CDTMesoscale DiscussionSPCBarber, Barton, Clark, Comanche, Edwards, Ellis and 15 more2 hr
Jul 4, 7:25 PM CDTSevere Thunderstorm WatchSPCCloud, Graham, Jewell, Mitchell, Norton, Osborne and 5 more7 hr
Jul 4, 9:21 PM CDTMesoscale DiscussionSPCButler, Chase, Cowley, Dickinson, Elk, Ellsworth and 11 more54 min
Jul 4, 9:40 PM CDTSevere Thunderstorm WatchSPCAllen, Anderson, Barber, Barton, Butler, Chase and 44 more6 hr
Jul 4, 10:45 PM CDTMesoscale DiscussionSPCCloud, Jewell, Mitchell, Phillips, Republic, Smith60 min
Jul 4, 11:20 PM CDTMesoscale DiscussionSPCBarber, Barton, Butler, Chase, Clark, Comanche and 30 more55 min
Jul 5, 2:06 AM CDTMesoscale DiscussionSPCAllen, Anderson, Barber, Butler, Chase, Chautauqua and 20 more114 min
Jul 5, 3:25 AM CDTSevere Thunderstorm WatchSPCAllen, Anderson, Bourbon, Chautauqua, Cherokee, Coffey and 10 more6 hr
Jul 5, 6:02 AM CDTMesoscale DiscussionSPCBourbon, Cherokee, Crawford, Labette, Montgomery, Neosho88 min
Jul 5, 12:40 PM CDTMesoscale DiscussionSPCCheyenne, Rawlins, Sherman, Thomas2 hr
Jul 5, 2:20 PM CDTSevere Thunderstorm WatchSPCCheyenne, Decatur, Gove, Logan, Rawlins, Sheridan and 3 more6 hr
Jul 5, 3:43 PM CDTMesoscale DiscussionSPCAllen, Anderson, Bourbon, Cherokee, Crawford, Labette and 5 more92 min
Jul 5, 4:21 PM CDTMesoscale DiscussionSPCAllen, Barber, Bourbon, Butler, Chautauqua, Cherokee and 20 more114 min
Jul 5, 4:36 PM CDTMesoscale DiscussionSPCClark, Finney, Ford, Grant, Gray, Hamilton and 7 more54 min
Jul 5, 4:40 PM CDTSevere Thunderstorm WatchSPCAllen, Barber, Bourbon, Butler, Chautauqua, Cherokee and 17 more5 hr
Jul 5, 5:45 PM CDTSevere Thunderstorm WatchSPCClark, Comanche, Edwards, Finney, Ford, Grant and 18 more6 hr
Jul 5, 5:52 PM CDTMesoscale DiscussionSPCCheyenne, Decatur, Graham, Logan, Norton, Rawlins and 4 more83 min
Jul 5, 6:55 AM CDTSevere Thunderstorm WatchSPCAudrain, Benton, Boone, Callaway, Camden, Cole and 19 more4 hr
Jul 5, 9:12 AM CDTMesoscale DiscussionSPCFranklin, Jefferson, Lincoln, Pike, Saint Charles, Saint Louis and 2 more63 min
Jul 5, 4:00 PM CDTTornado WatchSPCAudrain, Barton, Bates, Benton, Boone, Callaway and 46 more6 hr

Nearby

Mesoscale Discussions in Iowa, 2004Mesoscale Discussions in Missouri, 2004Mesoscale Discussions in Nebraska, 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.