Alert archive / Mississippi / Mesoscale Discussions in 2014

Mesoscale Discussion 1259

July 2, 20149 counties in Alabama; 13 parishes in Louisiana; 34 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Jul 2, 2014, 5:36 PM CDT for 9 counties in Alabama; 13 parishes in Louisiana; 34 counties in Mississippi. It was in force for 54 min.

The area

The outline as issued.

The facts

Issued: Jul 2, 2014, 5:36 PM CDT (22:36 UTC)
Expired: Jul 2, 2014, 6:30 PM CDT
In force: 54 min
Issued by: the Storm Prediction Center

All 56 counties

Fayette County, AL, Greene County, AL, Hale County, AL, Lamar County, AL, Marengo County, AL, Marion County, AL, Pickens County, AL, Sumter County, AL, Tuscaloosa County, AL, Allen Parish, LA, Avoyelles Parish, LA, Caldwell Parish, LA, Catahoula Parish, LA, Concordia Parish, LA, Evangeline Parish, LA, Franklin Parish, LA, Grant Parish, LA, LaSalle Parish, LA, Rapides Parish, LA, Tensas Parish, LA, Vernon Parish, LA, West Feliciana Parish, LA, Adams County, MS, Amite County, MS, Chickasaw County, MS, Choctaw County, MS, Claiborne County, MS, Clarke County, MS, Clay County, MS, Copiah County, MS, Franklin County, MS, Hinds County, MS, Itawamba County, MS, Jasper County, MS, Jefferson County, MS, Jefferson Davis County, MS, Kemper County, MS, Lauderdale County, MS, Lawrence County, MS, Leake County, MS, Lee County, MS, Lincoln County, MS, Lowndes County, MS, Monroe County, MS, Neshoba County, MS, Newton County, MS, Noxubee County, MS, Oktibbeha County, MS, Pontotoc County, MS, Rankin County, MS, Scott County, MS, Simpson County, MS, Smith County, MS, Webster County, MS, Wilkinson County, MS, Winston County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 57 km from the middle of the area, began a volume at 22:40 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 nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 10.6 hours before the alert went out and 62 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2402 J/kg
Mixed-layer CIN: -36 J/kg
Mixed-layer LCL: 984 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: -78 m²/s²
0-3 km storm-relative helicity: -14 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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.

Issued	Product	Office	Counties	Lasted
Jul 2, 1:41 PM CDT	Mesoscale Discussion	SPC	Allen, Avoyelles, Bienville, Caldwell, Catahoula, Concordia and 24 more	94 min
Jul 2, 2:17 PM CDT	Severe Thunderstorm Watch	SPC	Allen, Avoyelles, Beauregard, Caldwell, Catahoula, Concordia and 20 more	7 hr
Jul 1, 8:32 PM CDT	Mesoscale Discussion	SPC	Alcorn, DeSoto	2 hr

Nearby

Mesoscale Discussions in Mississippi, 2014 Mesoscale Discussions in Louisiana, 2014 Mesoscale Discussions in Alabama, 2014 Every 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.