Alert archive / Mississippi / Mesoscale Discussions in 2008

Mesoscale Discussion 301

February 25, 20084 states

The Storm Prediction Center issued this mesoscale discussion at Feb 25, 2008, 11:20 PM CST for 4 states. It was in force for 85 min.

The area

The outline as issued.

The facts

Issued
Feb 25, 2008, 11:20 PM CST (05:20 UTC)
Expired
Feb 26, 2008, 12:45 AM CST
In force
85 min
Issued by
the Storm Prediction Center
All 100 counties

Bibb County, AL, Choctaw County, AL, Clarke County, AL, Fayette County, AL, Greene County, AL, Hale County, AL, Lamar County, AL, Marengo County, AL, Perry County, AL, Pickens County, AL, Sumter County, AL, Tuscaloosa County, AL, Washington County, AL, Ashley County, AR, Chicot County, AR, Avoyelles Parish, LA, Bienville Parish, LA, Caldwell Parish, LA, Catahoula Parish, LA, Concordia Parish, LA, East Carroll Parish, LA, Franklin Parish, LA, Grant Parish, LA, Jackson Parish, LA, LaSalle Parish, LA, Lincoln Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Natchitoches Parish, LA, Ouachita Parish, LA, Rapides Parish, LA, Red River Parish, LA, Richland Parish, LA, Saint Helena Parish, LA, Tensas Parish, LA, Union Parish, LA, Vernon Parish, LA, Washington Parish, LA, West Carroll Parish, LA, Winn Parish, LA, Adams County, MS, Amite County, MS, Attala County, MS, Bolivar County, MS, Calhoun County, MS, Carroll County, MS, Chickasaw County, MS, Choctaw County, MS, Claiborne County, MS, Clarke County, MS, Clay County, MS, Copiah County, MS, Covington County, MS, Forrest County, MS, Franklin County, MS, Greene County, MS, Grenada County, MS, Hinds County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Jasper County, MS, Jefferson County, MS, Jefferson Davis County, MS, Jones County, MS, Kemper County, MS, Lamar County, MS, Lauderdale County, MS, Lawrence County, MS, Leake County, MS, Leflore County, MS, Lincoln County, MS, Lowndes County, MS, Madison County, MS, Marion County, MS, Monroe County, MS, Montgomery County, MS, Neshoba County, MS, Newton County, MS, Noxubee County, MS, Oktibbeha County, MS, Pearl River County, MS, Perry County, MS, Pike County, MS, Rankin County, MS, Scott County, MS, Sharkey County, MS, Simpson County, MS, Smith County, MS, Sunflower County, MS, Tallahatchie County, MS, Walthall County, MS, Warren County, MS, Washington County, MS, Wayne County, MS, Webster County, MS, Wilkinson County, MS, Winston County, MS, Yalobusha County, MS, Yazoo County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 64 km from the middle of the area, began a volume at 05:20 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 00:00Z, 5.3 hours before the alert went out and 54 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 00:00Z on 2008-02-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 00:00Z on 2008-02-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 207 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1551 m above ground
0-6 km bulk shear
67 kt
0-1 km storm-relative helicity
207 m²/s²
0-3 km storm-relative helicity
359 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.

IssuedProductOfficeCountiesLasted
Feb 26, 12:10 AM CSTSevere Thunderstorm WatchSPCAutauga, Bibb, Chilton, Choctaw, Dallas, Fayette and 12 more7 hr
Feb 26, 2:50 AM CSTMesoscale DiscussionSPCAutauga, Bibb, Chilton, Choctaw, Dallas, Fayette and 12 more85 min
Feb 26, 4:41 AM CSTSevere Thunderstorm WatchSPCBarbour, Bullock, Chambers, Clay, Cleburne, Coosa and 8 more7 hr
Feb 26, 5:12 AM CSTSevere Thunderstorm WatchSPCBaldwin, Butler, Clarke, Conecuh, Covington, Crenshaw and 5 more4 hr
Feb 26, 6:50 AM CSTMesoscale DiscussionSPCBarbour, Coffee, Covington, Dale, Geneva, Henry and 1 more85 min
Feb 26, 7:39 AM CSTSevere Thunderstorm WatchSPCCoffee, Dale, Geneva, Henry, Houston6 hr
Feb 26, 9:22 AM CSTMesoscale DiscussionSPCHouston83 min
Feb 26, 9:35 AM CSTMesoscale DiscussionSPCHouston85 min
Feb 25, 7:20 PM CSTSevere Thunderstorm WatchSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 17 more7 hr
Feb 25, 9:22 PM CSTMesoscale DiscussionSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Cleveland and 10 more83 min

Nearby

Mesoscale Discussions in Mississippi, 2008Mesoscale Discussions in Louisiana, 2008Mesoscale Discussions in Alabama, 2008Every mesoscale discussion in 2008

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.