Alert archive / Mississippi / Mesoscale Discussions in 2016

Mesoscale Discussion 126

February 23, 20164 states

The Storm Prediction Center issued this mesoscale discussion at Feb 23, 2016, 1:15 PM CST for 4 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Feb 23, 2016, 1:15 PM CST (19:15 UTC)
Expired
Feb 23, 2016, 3:15 PM CST
In force
2 hr
Issued by
the Storm Prediction Center
Chance of a watch
95%
All 49 counties

Baldwin County, AL, Butler County, AL, Choctaw County, AL, Clarke County, AL, Conecuh County, AL, Escambia County, AL, Marengo County, AL, Mobile County, AL, Monroe County, AL, Washington County, AL, Wilcox County, AL, Escambia County, FL, Santa Rosa County, FL, East Feliciana Parish, LA, Saint Helena Parish, LA, Saint Tammany Parish, LA, Tangipahoa Parish, LA, Washington Parish, LA, Amite County, MS, Clarke County, MS, Copiah County, MS, Covington County, MS, Forrest County, MS, Franklin County, MS, George County, MS, Greene County, MS, Hancock County, MS, Harrison County, MS, Jackson County, MS, Jasper County, MS, Jefferson County, MS, Jefferson Davis County, MS, Jones County, MS, Lamar County, MS, Lauderdale County, MS, Lawrence County, MS, Lincoln County, MS, Marion County, MS, Newton County, MS, Pearl River County, MS, Perry County, MS, Pike County, MS, Rankin County, MS, Scott County, MS, Simpson County, MS, Smith County, MS, Stone County, MS, Walthall County, MS, Wayne County, MS

The radar

The Mobile radar (KMOB), 113 km from the middle of the area, began a volume at 19:16 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

Jackson, MS (KJAN), launched 12:00Z, 7.3 hours before the alert went out and 140 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, Jackson, MS at 12:00Z on 2016-02-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 8 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, Jackson, MS at 12:00Z on 2016-02-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 104 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
8 J/kg
Mixed-layer CIN
-131 J/kg
Mixed-layer LCL
540 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
104 m²/s²
0-3 km storm-relative helicity
148 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Feb 23, 2:13 PM CSTTornado Watch PDSSPCBaldwin, Butler, Choctaw, Clarke, Conecuh, Covington and 6 more8 hr
Feb 23, 4:29 PM CSTMesoscale DiscussionSPCBarbour, Bullock, Butler, Coffee, Covington, Crenshaw and 3 more61 min
Feb 23, 5:18 PM CSTMesoscale DiscussionSPCChoctaw, Clarke, Monroe, Washington, Wilcox117 min
Feb 23, 5:35 PM CSTMesoscale DiscussionSPCAutauga, Bibb, Chilton, Clay, Coosa, Dallas and 9 more115 min
Feb 23, 5:53 PM CSTTornado WatchSPCAutauga, Barbour, Bibb, Bullock, Chambers, Chilton and 21 more6 hr
Feb 23, 10:44 AM CSTMesoscale DiscussionSPCAscension, Assumption, East Baton Rouge, Iberia, Iberville, Jefferson and 13 more91 min
Feb 23, 11:08 AM CSTTornado WatchSPCAcadia, Ascension, Assumption, East Baton Rouge, East Feliciana, Iberia and 23 more7 hr
Feb 23, 12:25 PM CSTMesoscale DiscussionSPCAscension, Assumption, East Baton Rouge, East Feliciana, Iberia, Iberville and 19 more65 min
Feb 23, 3:08 PM CSTMesoscale DiscussionSPCJefferson, Lafourche, Orleans, Plaquemines, Saint Bernard, Saint Charles and 4 more97 min
Feb 23, 2:20 PM CSTTornado WatchSPCAdams, Attala, Carroll, Choctaw, Claiborne, Clay and 26 more6 hr
Feb 23, 3:30 PM CSTMesoscale DiscussionSPCClaiborne, Copiah, Hinds, Madison, Rankin, Yazoo90 min

Nearby

Mesoscale Discussions in Mississippi, 2016Mesoscale Discussions in Alabama, 2016Mesoscale Discussions in Louisiana, 2016Every mesoscale discussion in 2016

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.