Alert archive / Mississippi / Mesoscale Discussions in 2007

Mesoscale Discussion 234

March 1, 20074 states

The Storm Prediction Center issued this mesoscale discussion at Mar 1, 2007, 6:54 AM CST for 4 states. It was in force for 66 min.

The area

The outline as issued.

The facts

Issued
Mar 1, 2007, 6:54 AM CST (12:54 UTC)
Expired
Mar 1, 2007, 8:00 AM CST
In force
66 min
Issued by
the Storm Prediction Center
All 107 counties

Bibb County, AL, Blount County, AL, Calhoun County, AL, Cherokee County, AL, Cleburne County, AL, Colbert County, AL, Cullman County, AL, DeKalb County, AL, Etowah County, AL, Fayette County, AL, Franklin County, AL, Greene County, AL, Hale County, AL, Jackson County, AL, Jefferson County, AL, Lamar County, AL, Lauderdale County, AL, Lawrence County, AL, Limestone County, AL, Madison County, AL, Marion County, AL, Marshall County, AL, Morgan County, AL, Pickens County, AL, Shelby County, AL, St. Clair County, AL, Talladega County, AL, Tuscaloosa County, AL, Walker County, AL, Winston County, AL, Crittenden County, AR, Cross County, AR, Lee County, AR, Phillips County, AR, St. Francis 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, Yazoo County, MS, Bedford County, TN, Carroll County, TN, Chester County, TN, Coffee County, TN, Crockett County, TN, Decatur County, TN, Fayette County, TN, Franklin County, TN, Gibson County, TN, Giles County, TN, Hardeman County, TN, Hardin County, TN, Haywood County, TN, Henderson County, TN, Hickman County, TN, Lauderdale County, TN, Lawrence County, TN, Lewis County, TN, Lincoln County, TN, Madison County, TN, Marshall County, TN, Maury County, TN, McNairy County, TN, Moore County, TN, Perry County, TN, Shelby County, TN, Tipton County, TN, Wayne County, TN

The radar

The Columbus AFB radar (KGWX), 84 km from the middle of the area, began a volume at 12:55 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, 0.9 hours before the alert went out and 100 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, Little Rock, AR at 12:00Z on 2007-03-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1164 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, Little Rock, AR at 12:00Z on 2007-03-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 244 square meters per square second.1939587897117136Sfc1 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
1164 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
619 m above ground
0-6 km bulk shear
65 kt
0-1 km storm-relative helicity
244 m²/s²
0-3 km storm-relative helicity
241 m²/s²
Significant tornado parameter
1.4
Supercell composite
6.0

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
Mar 1, 12:12 AM CSTMesoscale DiscussionSPCColbert, Franklin, Lauderdale2 hr
Mar 1, 1:05 AM CSTSevere Thunderstorm WatchSPCColbert, Franklin, Lauderdale7 hr
Mar 1, 2:57 AM CSTMesoscale DiscussionSPCAutauga, Barbour, Bullock, Butler, Clarke, Coffee and 15 more2 hr
Mar 1, 4:18 AM CSTMesoscale DiscussionSPCColbert, Franklin, Lauderdale117 min
Mar 1, 7:28 AM CSTTornado Watch PDSSPCBaldwin, Bibb, Blount, Chilton, Choctaw, Clarke and 29 more12 hr
Mar 1, 8:58 AM CSTMesoscale DiscussionSPCBarbour, Bullock, Coffee, Covington, Crenshaw, Dale and 7 more2 hr
Mar 1, 9:47 AM CSTTornado Watch PDSSPCAutauga, Barbour, Bullock, Butler, Calhoun, Chambers and 26 more10 hr
Mar 1, 10:33 AM CSTMesoscale DiscussionSPCColbert, Franklin, Lamar, Lauderdale, Marion, Pickens117 min
Mar 1, 11:39 AM CSTMesoscale DiscussionSPCAutauga, Baldwin, Barbour, Bibb, Bullock, Butler and 35 more2 hr
Mar 1, 1:40 PM CSTMesoscale DiscussionSPCDale, Henry65 min
Mar 1, 2:41 PM CSTMesoscale DiscussionSPCAutauga, Barbour, Bibb, Blount, Bullock, Butler and 43 more94 min
Mar 1, 5:22 PM CSTMesoscale DiscussionSPCAutauga, Baldwin, Barbour, Bibb, Blount, Bullock and 59 more83 min
Mar 1, 1:32 AM CSTTornado WatchSPCBenton, Boone, Carroll, Crawford, Franklin, Johnson and 7 more6 hr
Mar 1, 3:35 AM CSTMesoscale DiscussionSPCBaxter, Clay, Cleburne, Conway, Craighead, Cross and 18 more55 min
Mar 1, 3:58 AM CSTTornado WatchSPCBaxter, Clay, Cleburne, Conway, Craighead, Faulkner and 18 more8 hr
Mar 1, 5:23 AM CSTMesoscale DiscussionSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 19 more97 min
Mar 1, 6:17 AM CSTTornado WatchSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 22 more7 hr
Mar 1, 3:43 PM CSTMesoscale DiscussionSPCAnderson, Blount, Campbell, Claiborne, Clay, Cumberland and 18 more92 min

Nearby

Mesoscale Discussions in Mississippi, 2007Mesoscale Discussions in Alabama, 2007Mesoscale Discussions in Tennessee, 2007Every mesoscale discussion in 2007

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.