Alert archive / Illinois / Mesoscale Discussions in 2014
Mesoscale Discussion 877
The Storm Prediction Center issued this mesoscale discussion at Jun 7, 2014, 12:25 PM CDT for 6 states. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 7, 2014, 12:25 PM CDT (17:25 UTC)
- Expired
- Jun 7, 2014, 2:30 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 60%
All 107 counties
Baxter County, AR, Clay County, AR, Cleburne County, AR, Craighead County, AR, Fulton County, AR, Greene County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Lawrence County, AR, Marion County, AR, Mississippi County, AR, Poinsett County, AR, Randolph County, AR, Searcy County, AR, Sharp County, AR, Stone County, AR, Van Buren County, AR, Alexander County, IL, Bond County, IL, Clay County, IL, Clinton County, IL, Edwards County, IL, Fayette County, IL, Franklin County, IL, Gallatin County, IL, Hamilton County, IL, Hardin County, IL, Jackson County, IL, Jefferson County, IL, Johnson County, IL, Madison County, IL, Marion County, IL, Massac County, IL, Monroe County, IL, Montgomery County, IL, Perry County, IL, Pope County, IL, Pulaski County, IL, Randolph County, IL, Richland County, IL, Saint Clair County, IL, Saline County, IL, Union County, IL, Wabash County, IL, Washington County, IL, Wayne County, IL, White County, IL, Williamson County, IL, Posey County, IN, Vanderburgh County, IN, Ballard County, KY, Caldwell County, KY, Calloway County, KY, Carlisle County, KY, Crittenden County, KY, Fulton County, KY, Graves County, KY, Henderson County, KY, Hickman County, KY, Hopkins County, KY, Livingston County, KY, Lyon County, KY, Marshall County, KY, McCracken County, KY, Trigg County, KY, Union County, KY, Webster County, KY, Bollinger County, MO, Butler County, MO, Cape Girardeau County, MO, Carter County, MO, City of Saint Louis, MO, Dent County, MO, Douglas County, MO, Dunklin County, MO, Howell County, MO, Iron County, MO, Jefferson County, MO, Madison County, MO, Mississippi County, MO, New Madrid County, MO, Oregon County, MO, Ozark County, MO, Pemiscot County, MO, Perry County, MO, Reynolds County, MO, Ripley County, MO, Saint Francois County, MO, Saint Louis County, MO, Sainte Genevieve County, MO, Scott County, MO, Shannon County, MO, Stoddard County, MO, Texas County, MO, Washington County, MO, Wayne County, MO, Carroll County, TN, Crockett County, TN, Dyer County, TN, Gibson County, TN, Henry County, TN, Lake County, TN, Lauderdale County, TN, Obion County, TN, Tipton County, TN, Weakley County, TN
The radar
The Paducah radar (KPAH), 147 km from the middle of the area, began a volume at 17:26 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
Little Rock, AR (KBYH), launched 12:00Z, 5.4 hours before the alert went out and 268 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.
- Mixed-layer CAPE
- 1298 J/kg
- Mixed-layer CIN
- -67 J/kg
- Mixed-layer LCL
- 888 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 115 m²/s²
- 0-3 km storm-relative helicity
- 113 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.4
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 7, 1:54 AM CDT | Mesoscale Discussion | SPC | Benton, Crawford, Sebastian, Washington | 2 hr |
| Jun 7, 1:06 PM CDT | Mesoscale Discussion | SPC | Franklin, Logan, Montgomery, Polk, Scott, Sebastian and 1 more | 2 hr |
| Jun 7, 2:44 PM CDT | Severe Thunderstorm Watch | SPC | Clay, Cleburne, Conway, Craighead, Crittenden, Cross and 33 more | 6 hr |
| Jun 7, 4:44 PM CDT | Tornado Watch | SPC | Craighead, Greene, Mississippi, Poinsett | 7 hr |
| Jun 7, 6:32 PM CDT | Mesoscale Discussion | SPC | Arkansas, Grant, Hot Spring, Jefferson, Lee, Lincoln and 6 more | 88 min |
| Jun 7, 9:01 AM CDT | Mesoscale Discussion | SPC | Monroe, Randolph | 119 min |
| Jun 7, 2:27 PM CDT | Mesoscale Discussion | SPC | Bond, Calhoun, Clinton, Greene, Jersey, Macoupin and 4 more | 2 hr |
| Jun 7, 3:12 PM CDT | Mesoscale Discussion | SPC | Fulton, Graves | 63 min |
| Jun 7, 3:32 PM CDT | Mesoscale Discussion | SPC | Bedford, Cannon, Coffee, Davidson, DeKalb, Franklin and 17 more | 2 hr |
| Jun 7, 6:40 PM CDT | Severe Thunderstorm Watch | SPC | Bedford, Bledsoe, Cannon, Clay, Coffee, Cumberland and 22 more | 5 hr |
Nearby
Mesoscale Discussions in Illinois, 2014Mesoscale Discussions in Missouri, 2014Mesoscale Discussions in Arkansas, 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.