Alert archive / Illinois / Mesoscale Discussions in 2013

Mesoscale Discussion 2010

November 17, 201361 counties in Illinois; 13 counties in Iowa; 30 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Nov 17, 2013, 7:47 AM CST for 61 counties in Illinois; 13 counties in Iowa; 30 counties in Missouri. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued
Nov 17, 2013, 7:47 AM CST (13:47 UTC)
Expired
Nov 17, 2013, 9:15 AM CST
In force
88 min
Issued by
the Storm Prediction Center
Chance of a watch
80%
All 104 counties

Cedar County, IA, Clinton County, IA, Davis County, IA, Des Moines County, IA, Henry County, IA, Jefferson County, IA, Keokuk County, IA, Lee County, IA, Louisa County, IA, Muscatine County, IA, Scott County, IA, Van Buren County, IA, Washington County, IA, Adams County, IL, Bond County, IL, Brown County, IL, Bureau County, IL, Calhoun County, IL, Carroll County, IL, Cass County, IL, Champaign County, IL, Christian County, IL, Clinton County, IL, DeKalb County, IL, DeWitt County, IL, Douglas County, IL, DuPage County, IL, Fayette County, IL, Ford County, IL, Fulton County, IL, Greene County, IL, Grundy County, IL, Hancock County, IL, Henderson County, IL, Henry County, IL, Jersey County, IL, Kane County, IL, Kankakee County, IL, Kendall County, IL, Knox County, IL, LaSalle County, IL, Lee County, IL, Livingston County, IL, Logan County, IL, Macon County, IL, Macoupin County, IL, Madison County, IL, Marshall County, IL, Mason County, IL, McDonough County, IL, McLean County, IL, Menard County, IL, Mercer County, IL, Monroe County, IL, Montgomery County, IL, Morgan County, IL, Moultrie County, IL, Ogle County, IL, Peoria County, IL, Piatt County, IL, Pike County, IL, Putnam County, IL, Rock Island County, IL, Saint Clair County, IL, Sangamon County, IL, Schuyler County, IL, Scott County, IL, Shelby County, IL, Stark County, IL, Tazewell County, IL, Warren County, IL, Whiteside County, IL, Will County, IL, Woodford County, IL, Adair County, MO, Audrain County, MO, Boone County, MO, Callaway County, MO, City of Saint Louis, MO, Clark County, MO, Cole County, MO, Crawford County, MO, Franklin County, MO, Gasconade County, MO, Jefferson County, MO, Knox County, MO, Lewis County, MO, Lincoln County, MO, Macon County, MO, Maries County, MO, Marion County, MO, Monroe County, MO, Montgomery County, MO, Osage County, MO, Pike County, MO, Ralls County, MO, Randolph County, MO, Saint Charles County, MO, Saint Louis County, MO, Schuyler County, MO, Scotland County, MO, Shelby County, MO, Warren County, MO, Washington County, MO

The radar

The Lincoln radar (KILX), 114 km from the middle of the area, began a volume at 13:45 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, 1.8 hours before the alert went out and 175 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 2013-11-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1021 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 2013-11-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 398 square meters per square second.1939587897117Sfc1 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
1021 J/kg
Mixed-layer CIN
-53 J/kg
Mixed-layer LCL
506 m above ground
0-6 km bulk shear
67 kt
0-1 km storm-relative helicity
398 m²/s²
0-3 km storm-relative helicity
396 m²/s²
Significant tornado parameter
2.7
Supercell composite
11.0

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
Nov 16, 11:29 PM CSTMesoscale DiscussionSPCAlexander, Jackson, Johnson, Pulaski, Union, Williamson61 min
Nov 17, 2:06 AM CSTMesoscale DiscussionSPCAlexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 14 more84 min
Nov 17, 8:40 AM CSTTornado Watch PDSSPCAdams, Bond, Boone, Brown, Bureau, Calhoun and 77 more7 hr
Nov 17, 10:17 AM CSTMesoscale DiscussionSPCAlexander, Franklin, Gallatin, Hamilton, Hardin, Jackson and 10 more118 min
Nov 17, 10:43 AM CSTTornado WatchSPCAlexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more8 hr
Nov 17, 10:49 AM CSTMesoscale DiscussionSPCBond, Boone, Bureau, Calhoun, Cass, Champaign and 56 more86 min
Nov 17, 11:57 AM CSTMesoscale DiscussionSPCChampaign, Coles, Cook, DeWitt, Douglas, DuPage and 11 more93 min
Nov 17, 11:57 AM CSTMesoscale DiscussionSPCAlexander, Franklin, Gallatin, Hamilton, Hardin, Jackson and 10 more93 min
Nov 17, 1:05 PM CSTMesoscale DiscussionSPCAlexander, Hamilton, Johnson, Massac, Pope, Pulaski and 4 more55 min
Nov 17, 1:13 PM CSTMesoscale DiscussionSPCClark, Crawford, Edgar, Edwards, Jasper, Lawrence and 3 more77 min
Nov 17, 2:43 PM CSTMesoscale DiscussionSPCAlexander, Edwards, Gallatin, Hamilton, Hardin, Johnson and 8 more62 min
Nov 16, 7:53 PM CSTMesoscale DiscussionSPCAdair, Andrew, Buchanan, Caldwell, Carroll, Chariton and 16 more67 min
Nov 17, 3:46 PM CSTMesoscale DiscussionSPCDunklin, Pemiscot89 min

Nearby

Mesoscale Discussions in Illinois, 2013Mesoscale Discussions in Missouri, 2013Mesoscale Discussions in Iowa, 2013Every mesoscale discussion in 2013

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.