Alert archive / Mississippi / Mesoscale Discussions in 2003

Mesoscale Discussion 571

April 25, 20034 states

The Storm Prediction Center issued this mesoscale discussion at Apr 25, 2003, 1:15 AM CDT for 4 states. It was in force for 90 min.

The area

The outline as issued.

The facts

Issued
Apr 25, 2003, 1:15 AM CDT (06:15 UTC)
Expired
Apr 25, 2003, 2:45 AM CDT
In force
90 min
Issued by
the Storm Prediction Center
All 79 counties

Choctaw County, AL, Clarke County, AL, Greene County, AL, Hale County, AL, Marengo County, AL, Pickens County, AL, Sumter County, AL, Washington County, AL, Crittenden County, AR, Mississippi County, AR, Alcorn County, MS, Attala County, MS, Benton County, MS, Calhoun County, MS, Carroll County, MS, Chickasaw County, MS, Choctaw County, MS, Clarke County, MS, Clay County, MS, Covington County, MS, DeSoto County, MS, Forrest County, MS, Greene County, MS, Grenada County, MS, Holmes County, MS, Humphreys County, MS, Itawamba County, MS, Jasper County, MS, Jefferson Davis County, MS, Jones County, MS, Kemper County, MS, Lafayette County, MS, Lamar County, MS, Lauderdale County, MS, Lawrence County, MS, Leake County, MS, Lee County, MS, Leflore County, MS, Lowndes County, MS, Madison County, MS, Marion County, MS, Marshall County, MS, Monroe County, MS, Montgomery County, MS, Neshoba County, MS, Newton County, MS, Noxubee County, MS, Oktibbeha County, MS, Perry County, MS, Pontotoc County, MS, Prentiss County, MS, Rankin County, MS, Scott County, MS, Sharkey County, MS, Simpson County, MS, Smith County, MS, Tallahatchie County, MS, Tate County, MS, Tippah County, MS, Tishomingo County, MS, Union County, MS, Walthall County, MS, Wayne County, MS, Webster County, MS, Winston County, MS, Yalobusha County, MS, Yazoo County, MS, Chester County, TN, Crockett County, TN, Dyer County, TN, Fayette County, TN, Gibson County, TN, Hardeman County, TN, Haywood County, TN, Lauderdale County, TN, Madison County, TN, McNairy County, TN, Shelby County, TN, Tipton County, TN

The nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 6.3 hours before the alert went out and 145 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 2003-04-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1927 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 00:00Z on 2003-04-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 293 square meters per square second.19395878Sfc1 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
1927 J/kg
Mixed-layer CIN
-8 J/kg
Mixed-layer LCL
649 m above ground
0-6 km bulk shear
59 kt
0-1 km storm-relative helicity
293 m²/s²
0-3 km storm-relative helicity
370 m²/s²
Significant tornado parameter
4.7
Supercell composite
18.7

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
Apr 25, 3:05 AM CDTMesoscale DiscussionSPCBaldwin, Bibb, Butler, Choctaw, Clarke, Conecuh and 17 more85 min
Apr 25, 5:40 AM CDTMesoscale DiscussionSPCBaldwin, Coffee, Covington, Dale, Escambia, Geneva and 2 more65 min
Apr 25, 6:05 AM CDTTornado WatchSPCCoffee, Covington, Geneva, Houston6 hr
Apr 25, 7:41 AM CDTMesoscale DiscussionSPCHouston94 min
Apr 25, 11:04 AM CDTMesoscale DiscussionSPCColbert, Franklin, Lauderdale, Marion, Winston116 min
Apr 25, 12:45 PM CDTTornado WatchSPCAutauga, Bibb, Blount, Bullock, Butler, Calhoun and 45 more5 hr
Apr 25, 12:59 PM CDTMesoscale DiscussionSPCAutauga, Bibb, Blount, Chilton, Choctaw, Coosa and 15 more2 hr
Apr 25, 3:08 PM CDTMesoscale DiscussionSPCAutauga, Bibb, Blount, Bullock, Calhoun, Chambers and 24 more2 hr
Apr 25, 5:16 PM CDTMesoscale DiscussionSPCAutauga, Barbour, Bibb, Bullock, Butler, Chilton and 15 more59 min
Apr 25, 5:40 PM CDTTornado WatchSPCBarbour, Bullock, Butler, Choctaw, Clarke, Coffee and 10 more5 hr
Apr 24, 7:50 PM CDTTornado WatchSPCAshley, Chicot, Drew4 hr
Apr 24, 9:03 PM CDTMesoscale DiscussionSPCArkansas, Baxter, Clay, Cleburne, Cleveland, Conway and 33 more117 min
Apr 24, 10:51 PM CDTMesoscale DiscussionSPCAshley, Chicot, Drew84 min
Apr 24, 11:45 PM CDTTornado WatchSPCCraighead, Crittenden, Cross, Greene, Lawrence, Lee and 4 more5 hr
Apr 25, 2:40 PM CDTSevere Thunderstorm WatchSPCAmite, Covington, Forrest, Franklin, George, Greene and 13 more5 hr
Apr 25, 11:50 AM CDTSevere Thunderstorm WatchSPCBedford, Benton, Bledsoe, Bradley, Cannon, Cheatham and 43 more5 hr
Apr 25, 1:55 PM CDTMesoscale DiscussionSPCCheatham, Davidson, Dickson, Hickman, Houston, Lewis and 4 more2 hr
Apr 25, 3:22 PM CDTMesoscale DiscussionSPCBedford, Cannon, Cheatham, Davidson, DeKalb, Dickson and 20 more113 min
Apr 25, 4:40 PM CDTTornado WatchSPCClay, Macon4 hr
Apr 25, 4:45 PM CDTSevere Thunderstorm WatchSPCBedford, Bledsoe, Bradley, Cannon, Clay, Coffee and 28 more4 hr
Apr 25, 6:48 PM CDTMesoscale DiscussionSPCBledsoe, Bradley, Clay, Cumberland, DeKalb, Fentress and 13 more87 min

Nearby

Mesoscale Discussions in Mississippi, 2003Mesoscale Discussions in Tennessee, 2003Mesoscale Discussions in Alabama, 2003Every mesoscale discussion in 2003

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.