Alert archive / Illinois / Mesoscale Discussions in 2005

Mesoscale Discussion 1644

July 4, 20055 states

The Storm Prediction Center issued this mesoscale discussion at Jul 4, 2005, 3:22 PM CDT for 5 states. It was in force for 83 min.

The area

The outline as issued.

The facts

Issued
Jul 4, 2005, 3:22 PM CDT (20:22 UTC)
Expired
Jul 4, 2005, 4:45 PM CDT
In force
83 min
Issued by
the Storm Prediction Center
All 106 counties

Clay County, AR, Cleburne County, AR, Conway County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Fulton County, AR, Greene County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Lawrence County, AR, Mississippi County, AR, Poinsett County, AR, Randolph County, AR, Sharp County, AR, Stone County, AR, Van Buren County, AR, White County, AR, Woodruff County, AR, Alexander County, IL, Bond County, IL, Champaign County, IL, Christian County, IL, Clark County, IL, Clay County, IL, Clinton County, IL, Coles County, IL, Cook County, IL, Crawford County, IL, Cumberland County, IL, DeWitt County, IL, Douglas County, IL, DuPage County, IL, Edgar County, IL, Edwards County, IL, Effingham County, IL, Fayette County, IL, Ford County, IL, Franklin County, IL, Grundy County, IL, Hamilton County, IL, Iroquois County, IL, Jackson County, IL, Jasper County, IL, Jefferson County, IL, Johnson County, IL, Kankakee County, IL, Kendall County, IL, Livingston County, IL, Logan County, IL, Macon County, IL, Macoupin County, IL, Madison County, IL, Marion County, IL, McLean County, IL, Menard County, IL, Monroe County, IL, Montgomery County, IL, Moultrie County, IL, Perry County, IL, Piatt County, IL, Pulaski County, IL, Randolph County, IL, Richland County, IL, Saint Clair County, IL, Sangamon County, IL, Shelby County, IL, Union County, IL, Vermilion County, IL, Wabash County, IL, Washington County, IL, Wayne County, IL, Will County, IL, Williamson County, IL, Benton County, IN, Lake County, IN, Newton County, IN, Porter County, IN, Warren County, IN, Bollinger County, MO, Butler County, MO, Cape Girardeau County, MO, Carter County, MO, Crawford County, MO, Dent County, MO, Dunklin County, MO, Howell County, MO, Iron County, MO, Jefferson County, MO, Madison County, MO, Mississippi County, MO, New Madrid County, MO, Oregon County, MO, Pemiscot County, MO, Perry County, MO, Reynolds County, MO, Ripley County, MO, Saint Francois County, MO, Sainte Genevieve County, MO, Scott County, MO, Shannon County, MO, Stoddard County, MO, Washington County, MO, Wayne County, MO, Lake County, TN

The radar

The Lincoln radar (KILX), 116 km from the middle of the area, began a volume at 20:22 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

Lincoln, IL (KILX), launched 12:00Z, 8.4 hours before the alert went out and 134 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, Lincoln, IL at 12:00Z on 2005-07-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 149 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, Lincoln, IL at 12:00Z on 2005-07-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -53 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
149 J/kg
Mixed-layer CIN
-169 J/kg
Mixed-layer LCL
1395 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
-53 m²/s²
0-3 km storm-relative helicity
4 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, 12:01 AM CDTMesoscale DiscussionSPCBenton, Boone, Carroll, Conway, Crawford, Franklin and 10 more89 min
Jul 4, 1:40 AM CDTMesoscale DiscussionSPCBenton, Crawford, Franklin, Howard, Little River, Logan and 7 more35 min
Jul 4, 2:15 AM CDTSevere Thunderstorm WatchSPCBenton, Carroll, Crawford, Madison, Washington7 hr
Jul 4, 5:12 AM CDTMesoscale DiscussionSPCBenton, Boone, Carroll, Crawford, Franklin, Madison and 2 more63 min
Jul 4, 11:35 AM CDTMesoscale DiscussionSPCBradley, Calhoun, Clark, Cleveland, Columbia, Dallas and 11 more85 min
Jul 4, 12:21 PM CDTMesoscale DiscussionSPCClay, Cleburne, Craighead, Fulton, Greene, Independence and 8 more84 min
Jul 4, 12:50 PM CDTSevere Thunderstorm WatchSPCClay, Cleburne, Conway, Craighead, Cross, Fulton and 12 more6 hr
Jul 4, 5:41 PM CDTMesoscale DiscussionSPCClay, Cleburne, Conway, Craighead, Crittenden, Cross and 11 more94 min
Jul 4, 2:53 AM CDTMesoscale DiscussionSPCBoone, Bureau, Carroll, Cook, DeKalb, DuPage and 25 more97 min
Jul 4, 11:13 AM CDTMesoscale DiscussionSPCBond, Bureau, Calhoun, Cass, Champaign, Christian and 41 more92 min
Jul 4, 12:00 PM CDTSevere Thunderstorm WatchSPCBond, Champaign, Christian, Clark, Clay, Clinton and 41 more6 hr
Jul 4, 2:18 PM CDTMesoscale DiscussionSPCElkhart, LaGrange, Saint Joseph87 min
Jul 4, 2:50 PM CDTSevere Thunderstorm WatchSPCAdams, Allen, Cass, DeKalb, Elkhart, Fulton and 17 more4 hr
Jul 3, 7:20 PM CDTMesoscale DiscussionSPCBarry, Barton, Bates, Benton, Cedar, Christian and 19 more115 min
Jul 3, 7:45 PM CDTSevere Thunderstorm WatchSPCBarton, Bates, Camden, Cedar, Christian, Dade and 13 more7 hr
Jul 3, 8:56 PM CDTMesoscale DiscussionSPCAndrew, Atchison, Buchanan, Clay, Clinton, DeKalb and 5 more64 min
Jul 3, 9:48 PM CDTMesoscale DiscussionSPCBarry, Barton, Benton, Camden, Cedar, Christian and 30 more87 min
Jul 4, 1:21 PM CDTMesoscale DiscussionSPCBedford, Franklin, Giles, Lawrence, Lewis, Lincoln and 4 more84 min

Nearby

Mesoscale Discussions in Illinois, 2005Mesoscale Discussions in Missouri, 2005Mesoscale Discussions in Arkansas, 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.