Alert archive / Illinois / Mesoscale Discussions in 2014

Mesoscale Discussion 1107

June 21, 201448 counties in Illinois; 4 counties in Indiana; 6 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Jun 21, 2014, 3:41 PM CDT for 48 counties in Illinois; 4 counties in Indiana; 6 counties in Missouri. It was in force for 64 min.

The area

The outline as issued.

The facts

Issued
Jun 21, 2014, 3:41 PM CDT (20:41 UTC)
Expired
Jun 21, 2014, 4:45 PM CDT
In force
64 min
Issued by
the Storm Prediction Center
All 58 counties

Adams County, IL, Boone County, IL, Brown County, IL, Bureau County, IL, Carroll County, IL, Cass County, IL, Cook County, IL, DeKalb County, IL, DeWitt County, IL, DuPage County, IL, Ford County, IL, Fulton County, IL, Grundy County, IL, Hancock County, IL, Henderson County, IL, Henry 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, Morgan County, IL, Ogle County, IL, Peoria County, IL, Pike County, IL, Putnam County, IL, Sangamon County, IL, Schuyler County, IL, Scott County, IL, Stark County, IL, Stephenson County, IL, Tazewell County, IL, Warren County, IL, Whiteside County, IL, Will County, IL, Winnebago County, IL, Woodford County, IL, Benton County, IN, Jasper County, IN, Lake County, IN, Newton County, IN, Lewis County, MO, Marion County, MO, Monroe County, MO, Pike County, MO, Ralls County, MO, Shelby County, MO

The radar

The Lincoln radar (KILX), 73 km from the middle of the area, began a volume at 20:43 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, 8.7 hours before the alert went out and 98 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 2014-06-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 47 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 2014-06-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 44 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
47 J/kg
Mixed-layer CIN
-222 J/kg
Mixed-layer LCL
1469 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
44 m²/s²
0-3 km storm-relative helicity
34 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 21, 12:41 PM CDTMesoscale DiscussionSPCAdams, Boone, Brown, Bureau, Carroll, Cass and 33 more2 hr
Jun 21, 1:33 PM CDTSevere Thunderstorm WatchSPCAdams, Boone, Brown, Bureau, Calhoun, Carroll and 57 more7 hr
Jun 21, 6:16 PM CDTMesoscale DiscussionSPCAdams, Bond, Brown, Bureau, Calhoun, Cass and 52 more89 min
Jun 20, 8:29 PM CDTMesoscale DiscussionSPCAtchison, Holt, Nodaway91 min
Jun 20, 8:51 PM CDTSevere Thunderstorm WatchSPCAndrew, Atchison, DeKalb, Gentry, Harrison, Holt and 2 more6 hr
Jun 20, 11:28 PM CDTMesoscale DiscussionSPCAndrew, Atchison, Daviess, Gentry, Harrison, Holt and 2 more92 min
Jun 21, 1:57 AM CDTMesoscale DiscussionSPCAndrew, Atchison, DeKalb, Gentry, Harrison, Holt and 2 more63 min

Nearby

Mesoscale Discussions in Illinois, 2014Mesoscale Discussions in Missouri, 2014Mesoscale Discussions in Indiana, 2014Every mesoscale discussion in 2014

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.