Alert archive / Mississippi / Mesoscale Discussions in 2013
Mesoscale Discussion 563
The Storm Prediction Center issued this mesoscale discussion at Apr 27, 2013, 1:55 PM CDT for 4 states. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 27, 2013, 1:55 PM CDT (18:55 UTC)
- Expired
- Apr 27, 2013, 4:00 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 80%
All 81 counties
Colbert County, AL, Fayette County, AL, Franklin County, AL, Lamar County, AL, Lauderdale County, AL, Marion County, AL, Pickens County, AL, Arkansas County, AR, Chicot County, AR, Crittenden County, AR, Cross County, AR, Desha County, AR, Drew County, AR, Jefferson County, AR, Lee County, AR, Lincoln County, AR, Mississippi County, AR, Monroe County, AR, Phillips County, AR, Poinsett County, AR, Prairie County, AR, St. Francis County, AR, Woodruff County, AR, Alcorn County, MS, Attala 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, Holmes County, MS, Humphreys County, MS, Itawamba County, MS, Kemper County, MS, Lafayette County, MS, Leake County, MS, Lee County, MS, Leflore County, MS, Lowndes County, MS, Marshall County, MS, Monroe County, MS, Montgomery County, MS, Neshoba County, MS, Noxubee County, MS, Oktibbeha County, MS, Panola County, MS, Pontotoc County, MS, Prentiss County, MS, Quitman County, MS, Sharkey County, MS, Sunflower County, MS, Tallahatchie County, MS, Tate County, MS, Tippah County, MS, Tishomingo County, MS, Tunica County, MS, Union County, MS, Washington County, MS, Webster County, MS, Winston County, MS, Yalobusha County, MS, Chester County, TN, Crockett County, TN, Decatur County, TN, Fayette County, TN, Hardeman County, TN, Hardin County, TN, Haywood County, TN, Henderson County, TN, Lauderdale County, TN, Madison County, TN, McNairy County, TN, Perry County, TN, Shelby County, TN, Tipton County, TN, Wayne County, TN
The radar
The Columbus AFB radar (KGWX), 109 km from the middle of the area, began a volume at 18:56 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
Little Rock, AR (KLZK), launched 12:00Z, 6.9 hours before the alert went out and 88 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 429 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- 163 m²/s²
- 0-3 km storm-relative helicity
- 159 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 |
|---|---|---|---|---|
| Apr 27, 4:54 PM CDT | Mesoscale Discussion | SPC | Blount, Calhoun, Cherokee, Colbert, Cullman, DeKalb and 12 more | 66 min |
| Apr 27, 5:24 PM CDT | Severe Thunderstorm Watch | SPC | Blount, Calhoun, Cherokee, Colbert, Cullman, DeKalb and 20 more | 4 hr |
| Apr 27, 12:57 AM CDT | Mesoscale Discussion | SPC | Howard, Polk, Scott, Sebastian, Sevier | 2 hr |
| Apr 27, 2:50 AM CDT | Mesoscale Discussion | SPC | Polk, Scott | 25 min |
| Apr 27, 3:47 PM CDT | Tornado Watch | SPC | Arkansas, Crittenden, Cross, Jefferson, Lee, Lonoke and 5 more | 10 hr |
| Apr 27, 6:54 PM CDT | Mesoscale Discussion | SPC | Bradley, Calhoun, Cleveland, Drew, Lincoln, Union | 66 min |
Nearby
Mesoscale Discussions in Mississippi, 2013Mesoscale Discussions in Arkansas, 2013Mesoscale Discussions in Tennessee, 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.