Alert archive / Illinois / Mesoscale Discussions in 2005

Mesoscale Discussion 440

March 30, 200536 counties in Illinois; 17 counties in Indiana; Allegan County, Berrien County, Van Buren County, Michigan

The Storm Prediction Center issued this mesoscale discussion at Mar 30, 2005, 5:24 PM CST for 36 counties in Illinois; 17 counties in Indiana; Allegan County, Berrien County, Van Buren County, Michigan. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Mar 30, 2005, 5:24 PM CST (23:24 UTC)
Expired
Mar 30, 2005, 7:30 PM CST
In force
2 hr
Issued by
the Storm Prediction Center
All 56 counties

Bond County, IL, Champaign County, IL, Christian County, IL, Clark County, IL, Clay 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, Effingham County, IL, Fayette County, IL, Ford County, IL, Grundy County, IL, Iroquois County, IL, Jasper County, IL, Kankakee County, IL, Kendall County, IL, Lake County, IL, Lawrence County, IL, Livingston County, IL, Logan County, IL, Macon County, IL, Marion County, IL, McLean County, IL, Montgomery County, IL, Moultrie County, IL, Piatt County, IL, Richland County, IL, Sangamon County, IL, Shelby County, IL, Vermilion County, IL, Will County, IL, Benton County, IN, Fountain County, IN, Jasper County, IN, Lake County, IN, LaPorte County, IN, Newton County, IN, Parke County, IN, Porter County, IN, Pulaski County, IN, Saint Joseph County, IN, Starke County, IN, Sullivan County, IN, Tippecanoe County, IN, Vermillion County, IN, Vigo County, IN, Warren County, IN, White County, IN, Allegan County, MI, Berrien County, MI, Van Buren County, MI

The radar

The Chicago radar (KLOT), 67 km from the middle of the area, began a volume at 23:25 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

Lincoln, IL (KILX), launched 12:00Z, 11.4 hours before the alert went out and 109 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 2005-03-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2005-03-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 244 square meters per square second.1939587897Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1491 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
244 m²/s²
0-3 km storm-relative helicity
299 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
Mar 30, 10:46 AM CSTMesoscale DiscussionSPCAdams, Brown, Carroll, Cass, Fulton, Hancock and 14 more119 min
Mar 30, 11:05 AM CSTTornado WatchSPCBureau, Carroll, Fulton, Hancock, Henderson, Henry and 15 more5 hr
Mar 30, 12:08 PM CSTMesoscale DiscussionSPCBond, Calhoun, Cass, Champaign, Christian, Clark and 49 more2 hr
Mar 30, 12:55 PM CSTTornado WatchSPCBond, Boone, Bureau, Champaign, Christian, Clark and 49 more7 hr
Mar 30, 1:23 PM CSTMesoscale DiscussionSPCBureau, Carroll, Fulton, Hancock, Henderson, Henry and 15 more97 min
Mar 30, 2:15 PM CSTTornado WatchSPCBoone, Bureau, Carroll, DeKalb, Henry, Jo Daviess and 11 more6 hr
Mar 30, 3:18 PM CSTMesoscale DiscussionSPCBoone, Champaign, Clark, Coles, Cook, Crawford and 28 more117 min
Mar 30, 3:54 PM CSTMesoscale DiscussionSPCBoone, Bureau, Carroll, Jo Daviess, Lee, McHenry and 4 more66 min

Nearby

Mesoscale Discussions in Illinois, 2005Mesoscale Discussions in Indiana, 2005Mesoscale Discussions in Michigan, 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.