Alert archive / Illinois / Mesoscale Discussions in 2004

Mesoscale Discussion 1263

June 14, 200438 counties in Illinois; 4 counties in Indiana

The Storm Prediction Center issued this mesoscale discussion at Jun 14, 2004, 10:03 AM CDT for 38 counties in Illinois; 4 counties in Indiana. It was in force for 57 min.

The area

The outline as issued.

The facts

Issued
Jun 14, 2004, 10:03 AM CDT (15:03 UTC)
Expired
Jun 14, 2004, 11:00 AM CDT
In force
57 min
Issued by
the Storm Prediction Center
All 42 counties

Boone County, IL, Bureau County, IL, Champaign County, IL, Cook County, IL, DeKalb County, IL, DeWitt County, IL, DuPage County, IL, Ford County, IL, Fulton County, IL, Grundy County, IL, Henderson County, IL, Iroquois County, IL, Kane County, IL, Kankakee County, IL, Kendall County, IL, Knox County, IL, Lake County, IL, LaSalle County, IL, Lee County, IL, Livingston County, IL, Logan County, IL, Marshall County, IL, Mason County, IL, McDonough County, IL, McHenry County, IL, McLean County, IL, Menard County, IL, Ogle County, IL, Peoria County, IL, Piatt County, IL, Putnam County, IL, Schuyler County, IL, Tazewell County, IL, Vermilion County, IL, Warren County, IL, Will County, IL, Winnebago County, IL, Woodford County, IL, Lake County, IN, Newton County, IN, Vermillion County, IN, Warren County, IN

The radar

The Lincoln radar (KILX), 100 km from the middle of the area, began a volume at 15:05 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

Davenport, (KDVN), launched 12:00Z, 3.1 hours before the alert went out and 101 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, Davenport, at 12:00Z on 2004-06-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 544 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Davenport, at 12:00Z on 2004-06-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 42 square meters per square second.1939Sfc1 km3 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
544 J/kg
Mixed-layer CIN
-42 J/kg
Mixed-layer LCL
1019 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
42 m²/s²
0-3 km storm-relative helicity
62 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
Jun 14, 5:25 AM CDTMesoscale DiscussionSPCBureau, DeKalb, Grundy, Henderson, Henry, Kendall and 12 more3 hr
Jun 14, 6:50 AM CDTSevere Thunderstorm WatchSPCBoone, Brown, Bureau, Carroll, Cass, Champaign and 44 more6 hr
Jun 14, 7:42 AM CDTMesoscale DiscussionSPCBureau, Carroll, Cass, DeKalb, DeWitt, Ford and 31 more2 hr
Jun 14, 3:15 PM CDTMesoscale DiscussionSPCBond, Calhoun, Greene, Jersey, Macoupin, Madison and 2 more90 min
Jun 14, 4:10 PM CDTSevere Thunderstorm WatchSPCBond, Calhoun, Clay, Clinton, Edwards, Effingham and 29 more6 hr
Jun 13, 7:30 PM CDTMesoscale DiscussionSPCBartholomew, Dearborn, Decatur, Fayette, Franklin, Randolph and 4 more90 min
Jun 14, 9:06 AM CDTMesoscale DiscussionSPCAdams, Allen, Carroll, Cass, DeKalb, Elkhart and 18 more54 min
Jun 14, 9:40 AM CDTSevere Thunderstorm WatchSPCAdams, Allen, Blackford, Boone, Carroll, Cass and 32 more7 hr
Jun 14, 10:22 AM CDTMesoscale DiscussionSPCAdams, Allen, Blackford, Cass, DeKalb, Delaware and 20 more53 min
Jun 14, 12:29 PM CDTMesoscale DiscussionSPCAdams, Allen, Blackford, Boone, Clinton, DeKalb and 16 more91 min

Nearby

Mesoscale Discussions in Illinois, 2004Mesoscale Discussions in Indiana, 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.