Alert archive / Illinois / Mesoscale Discussions in 2015

Mesoscale Discussion 598

May 10, 201537 counties in Illinois; 11 counties in Kentucky; 5 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at May 10, 2015, 6:30 PM CDT for 37 counties in Illinois; 11 counties in Kentucky; 5 counties in Missouri. It was in force for 90 min.

The area

The outline as issued.

The facts

Issued
May 10, 2015, 6:30 PM CDT (23:30 UTC)
Expired
May 10, 2015, 8:00 PM CDT
In force
90 min
Issued by
the Storm Prediction Center
All 53 counties

Alexander County, IL, Bond County, IL, Christian County, IL, Clay County, IL, Clinton County, IL, Edwards County, IL, Effingham County, IL, Fayette County, IL, Franklin County, IL, Gallatin County, IL, Greene County, IL, Hamilton County, IL, Hardin County, IL, Jackson County, IL, Jasper County, IL, Jefferson County, IL, Johnson County, IL, Macoupin County, IL, Madison County, IL, Marion County, IL, Massac County, IL, Montgomery County, IL, Morgan County, IL, Perry County, IL, Pope County, IL, Pulaski County, IL, Richland County, IL, Saint Clair County, IL, Saline County, IL, Sangamon County, IL, Scott County, IL, Shelby County, IL, Union County, IL, Washington County, IL, Wayne County, IL, White County, IL, Williamson County, IL, Ballard County, KY, Calloway County, KY, Carlisle County, KY, Crittenden County, KY, Fulton County, KY, Graves County, KY, Hickman County, KY, Livingston County, KY, Lyon County, KY, Marshall County, KY, McCracken County, KY, Cape Girardeau County, MO, Mississippi County, MO, New Madrid County, MO, Scott County, MO, Stoddard County, MO

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 11.5 hours before the alert went out and 212 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 2015-05-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 66 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 2015-05-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 74 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
66 J/kg
Mixed-layer CIN
-56 J/kg
Mixed-layer LCL
777 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
74 m²/s²
0-3 km storm-relative helicity
142 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
May 10, 3:52 PM CDTMesoscale DiscussionSPCAdams, Alexander, Bond, Brown, Calhoun, Clinton and 24 more68 min
May 10, 4:02 PM CDTSevere Thunderstorm WatchSPCAlexander, Bond, Calhoun, Clinton, Fayette, Franklin and 23 more4 hr
May 10, 5:17 PM CDTMesoscale DiscussionSPCBrown, Bureau, Carroll, Cass, Christian, Fulton and 22 more88 min
May 10, 11:00 AM CDTMesoscale DiscussionSPCBarton, Bates, Benton, Boone, Camden, Cedar and 32 more3 hr
May 10, 11:52 AM CDTMesoscale DiscussionSPCAndrew, Atchison, Caldwell, Carroll, Chariton, Clinton and 14 more2 hr
May 10, 1:22 PM CDTTornado WatchSPCAdair, Audrain, Benton, Boone, Butler, Callaway and 54 more4 hr
May 10, 1:47 PM CDTSevere Thunderstorm WatchSPCAndrew, Atchison, Barry, Barton, Bates, Buchanan and 28 more8 hr
May 10, 3:13 PM CDTMesoscale DiscussionSPCAndrew, Atchison, Barton, Bates, Buchanan, Caldwell and 17 more92 min

Nearby

Mesoscale Discussions in Illinois, 2015Mesoscale Discussions in Kentucky, 2015Mesoscale Discussions in Missouri, 2015Every mesoscale discussion in 2015

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.