Alert archive / Illinois / Mesoscale Discussions in 2014

Mesoscale Discussion 1365

July 14, 20144 states

The Storm Prediction Center issued this mesoscale discussion at Jul 14, 2014, 10:56 AM CDT for 4 states. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued
Jul 14, 2014, 10:56 AM CDT (15:56 UTC)
Expired
Jul 14, 2014, 12:30 PM CDT
In force
94 min
Issued by
the Storm Prediction Center
Chance of a watch
40%
All 64 counties

Brown County, IL, Calhoun County, IL, Cass County, IL, Champaign County, IL, Christian County, IL, DeWitt County, IL, Ford County, IL, Fulton County, IL, Greene County, IL, Grundy County, IL, Iroquois County, IL, Jersey County, IL, Kankakee County, IL, Livingston County, IL, Logan County, IL, Macon County, IL, Macoupin County, IL, Madison County, IL, Mason County, IL, McLean County, IL, Menard County, IL, Montgomery County, IL, Morgan County, IL, Moultrie County, IL, Piatt County, IL, Pike County, IL, Sangamon County, IL, Schuyler County, IL, Scott County, IL, Tazewell County, IL, Will County, IL, Woodford County, IL, Lake County, IN, Newton County, IN, Johnson County, KS, Miami County, KS, Audrain County, MO, Bates County, MO, Benton County, MO, Boone County, MO, Callaway County, MO, Cass County, MO, Cole County, MO, Cooper County, MO, Gasconade County, MO, Henry County, MO, Howard County, MO, Jackson County, MO, Johnson County, MO, Lafayette County, MO, Lincoln County, MO, Miller County, MO, Moniteau County, MO, Monroe County, MO, Montgomery County, MO, Morgan County, MO, Osage County, MO, Pettis County, MO, Pike County, MO, Ralls County, MO, Randolph County, MO, Saint Charles County, MO, Saline County, MO, Warren County, MO

The radar

The St Louis radar (KLSX), 126 km from the middle of the area, began a volume at 15:56 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, 3.9 hours before the alert went out and 188 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 2014-07-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 745 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 2014-07-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 54 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
745 J/kg
Mixed-layer CIN
-27 J/kg
Mixed-layer LCL
876 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
54 m²/s²
0-3 km storm-relative helicity
92 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.6

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
Jul 13, 10:04 PM CDTMesoscale DiscussionSPCAlexander, Gallatin, Hardin, Johnson, Massac, Pope and 4 more86 min
Jul 14, 11:42 AM CDTSevere Thunderstorm WatchSPCBond, Calhoun, Champaign, Christian, Clark, Clay and 42 more6 hr
Jul 14, 2:21 PM CDTMesoscale DiscussionSPCBond, Clark, Clay, Clinton, Coles, Crawford and 29 more54 min
Jul 14, 4:53 PM CDTMesoscale DiscussionSPCEdwards, Gallatin, Hamilton, Saline, Wabash, White67 min
Jul 14, 5:28 PM CDTSevere Thunderstorm WatchSPCDearborn, Fayette, Franklin, Ripley, Union, Wayne3 hr
Jul 14, 12:48 PM CDTMesoscale DiscussionSPCGrant, Greeley, Hamilton, Kearny, Morton, Stanton and 2 more57 min
Jul 14, 1:10 PM CDTMesoscale DiscussionSPCAllen, Anderson, Barber, Bourbon, Butler, Chase and 34 more2 hr
Jul 14, 12:10 PM CDTMesoscale DiscussionSPCDunklin, New Madrid, Pemiscot2 hr
Jul 14, 1:22 PM CDTSevere Thunderstorm WatchSPCDunklin, Pemiscot7 hr
Jul 14, 3:57 PM CDTMesoscale DiscussionSPCDunklin, Pemiscot93 min
Jul 14, 5:53 PM CDTMesoscale DiscussionSPCPemiscot97 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.