Alert archive / Mississippi / Mesoscale Discussions in 2018
Mesoscale Discussion 842
The Storm Prediction Center issued this mesoscale discussion at Jun 23, 2018, 4:50 PM CDT for 7 states. It was in force for 115 min.
The area
The outline as issued.
The facts
- Issued
- Jun 23, 2018, 4:50 PM CDT (21:50 UTC)
- Expired
- Jun 23, 2018, 6:45 PM CDT
- In force
- 115 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 40%
All 119 counties
Colbert County, AL, Franklin County, AL, Lamar County, AL, Lauderdale County, AL, Marion County, AL, Clay County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Greene County, AR, Lee County, AR, Mississippi County, AR, Phillips County, AR, Poinsett County, AR, Randolph County, AR, St. Francis County, AR, Alexander County, IL, Franklin County, IL, Gallatin County, IL, Hardin County, IL, Jackson County, IL, Johnson County, IL, Massac County, IL, Pope County, IL, Pulaski County, IL, Saline County, IL, Union County, IL, Williamson County, IL, Ballard County, KY, Caldwell 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, Trigg County, KY, Bollinger County, MO, Butler County, MO, Cape Girardeau County, MO, Carter County, MO, Dunklin County, MO, Iron County, MO, Madison County, MO, Mississippi County, MO, New Madrid County, MO, Pemiscot County, MO, Perry County, MO, Reynolds County, MO, Ripley County, MO, Sainte Genevieve County, MO, Scott County, MO, Stoddard County, MO, Wayne County, MO, Alcorn County, MS, Benton County, MS, Bolivar County, MS, Calhoun County, MS, Carroll County, MS, Chickasaw County, MS, Choctaw County, MS, Clay County, MS, Coahoma County, MS, DeSoto County, MS, Grenada County, MS, Itawamba County, MS, Lafayette County, MS, Lee County, MS, Leflore County, MS, Marshall County, MS, Monroe County, MS, Montgomery County, MS, Oktibbeha County, MS, Panola County, MS, Pontotoc County, MS, Prentiss County, MS, Quitman County, MS, Sunflower County, MS, Tallahatchie County, MS, Tate County, MS, Tippah County, MS, Tishomingo County, MS, Tunica County, MS, Union County, MS, Webster County, MS, Yalobusha County, MS, Benton County, TN, Carroll County, TN, Chester County, TN, Crockett County, TN, Decatur County, TN, Dyer County, TN, Fayette County, TN, Gibson County, TN, Hardeman County, TN, Hardin County, TN, Haywood County, TN, Henderson County, TN, Henry County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Lake County, TN, Lauderdale County, TN, Lawrence County, TN, Lewis County, TN, Madison County, TN, McNairy County, TN, Obion County, TN, Perry County, TN, Shelby County, TN, Stewart County, TN, Tipton County, TN, Wayne County, TN, Weakley County, TN
The radar
The Memphis radar (KNQA), 62 km from the middle of the area, began a volume at 21:51 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
Nashville Metro, TN (KBNA), launched 12:00Z, 9.8 hours before the alert went out and 279 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
- 25 J/kg
- Mixed-layer CIN
- -55 J/kg
- Mixed-layer LCL
- 952 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 127 m²/s²
- 0-3 km storm-relative helicity
- 140 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 23, 7:17 AM CDT | Mesoscale Discussion | SPC | Blount, Colbert, Cullman, Fayette, Franklin, Jefferson and 6 more | 118 min |
| Jun 23, 10:32 AM CDT | Mesoscale Discussion | SPC | Cherokee, Colbert, Cullman, DeKalb, Etowah, Franklin and 8 more | 88 min |
| Jun 23, 11:09 AM CDT | Severe Thunderstorm Watch | SPC | DeKalb, Jackson, Limestone, Madison, Marshall, Morgan | 4 hr |
| Jun 23, 5:40 PM CDT | Tornado Watch | SPC | Blount, Colbert, Cullman, Fayette, Franklin, Lamar and 9 more | 4 hr |
| Jun 22, 11:09 PM CDT | Mesoscale Discussion | SPC | Crawford, Garland, Hempstead, Howard, Little River, Logan and 7 more | 2 hr |
| Jun 22, 11:48 PM CDT | Severe Thunderstorm Watch | SPC | Arkansas, Clark, Cleburne, Cleveland, Conway, Crawford and 33 more | 7 hr |
| Jun 23, 1:01 AM CDT | Mesoscale Discussion | SPC | Crawford, Garland, Hempstead, Howard, Little River, Logan and 7 more | 59 min |
| Jun 23, 4:45 AM CDT | Mesoscale Discussion | SPC | Arkansas, Clark, Cleveland, Dallas, Garland, Grant and 14 more | 90 min |
Nearby
Mesoscale Discussions in Mississippi, 2018Mesoscale Discussions in Tennessee, 2018Mesoscale Discussions in Missouri, 2018Every mesoscale discussion in 2018
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.