Alert archive / Mississippi / Mesoscale Discussions in 2005

Mesoscale Discussion 412

March 27, 200511 counties in Alabama; Washington Parish, Louisiana; 37 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Mar 27, 2005, 3:27 AM CST for 11 counties in Alabama; Washington Parish, Louisiana; 37 counties in Mississippi. It was in force for 33 min.

The area

The outline as issued.

The facts

Issued
Mar 27, 2005, 3:27 AM CST (09:27 UTC)
Expired
Mar 27, 2005, 4:00 AM CST
In force
33 min
Issued by
the Storm Prediction Center
All 49 counties

Choctaw County, AL, Clarke 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, Washington Parish, LA, Amite County, MS, Chickasaw County, MS, Choctaw County, MS, Clarke County, MS, Clay County, MS, Covington County, MS, Forrest County, MS, George County, MS, Greene County, MS, Harrison County, MS, Jackson County, MS, Jasper County, MS, Jefferson Davis County, MS, Jones County, MS, Kemper County, MS, Lamar County, MS, Lauderdale County, MS, Lawrence County, MS, Leake County, MS, Lincoln County, MS, Lowndes County, MS, Marion County, MS, Monroe County, MS, Neshoba County, MS, Newton County, MS, Noxubee County, MS, Oktibbeha County, MS, Pearl River County, MS, Perry County, MS, Pike County, MS, Scott County, MS, Simpson County, MS, Smith County, MS, Stone County, MS, Walthall County, MS, Wayne County, MS, Winston County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 101 km from the middle of the area, began a volume at 09:30 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 00:00Z, 9.5 hours before the alert went out and 111 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 2005-03-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 356 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 2005-03-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 46 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
356 J/kg
Mixed-layer CIN
-21 J/kg
Mixed-layer LCL
1347 m above ground
0-6 km bulk shear
69 kt
0-1 km storm-relative helicity
46 m²/s²
0-3 km storm-relative helicity
122 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.7

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
Mar 26, 6:05 PM CSTSevere Thunderstorm WatchSPCBibb, Blount, Calhoun, Chambers, Cherokee, Chilton and 23 more3 hr
Mar 26, 8:45 PM CSTTornado WatchSPCAutauga, Baldwin, Bibb, Blount, Bullock, Butler and 44 more7 hr
Mar 26, 9:00 PM CSTTornado WatchSPCBarbour, Dale, Geneva, Henry, Houston, Lee and 1 more7 hr
Mar 26, 10:43 PM CSTMesoscale DiscussionSPCAutauga, Barbour, Bibb, Bullock, Butler, Chilton and 24 more62 min
Mar 27, 1:14 AM CSTMesoscale DiscussionSPCAutauga, Baldwin, Barbour, Bibb, Blount, Bullock and 50 more91 min
Mar 27, 2:27 AM CSTMesoscale DiscussionSPCBaldwin, Barbour, Bullock, Butler, Coffee, Conecuh and 13 more63 min
Mar 27, 3:45 AM CSTTornado WatchSPCBarbour, Bullock, Coffee, Covington, Crenshaw, Dale and 6 more6 hr
Mar 27, 6:53 AM CSTMesoscale DiscussionSPCBarbour, Coffee, Covington, Dale, Geneva, Henry and 1 more2 hr
Mar 27, 9:08 AM CSTMesoscale DiscussionSPCCovington, Geneva, Houston37 min
Mar 27, 9:35 AM CSTTornado WatchSPCBarbour, Bullock, Coffee, Covington, Crenshaw, Dale and 5 more7 hr
Mar 27, 11:06 AM CSTMesoscale DiscussionSPCAutauga, Bibb, Blount, Butler, Calhoun, Cherokee and 33 more54 min
Mar 27, 11:40 AM CSTTornado WatchSPCAutauga, Bibb, Blount, Calhoun, Chambers, Cherokee and 25 more5 hr
Mar 27, 2:24 PM CSTMesoscale DiscussionSPCAutauga, Barbour, Bibb, Blount, Bullock, Chilton and 23 more2 hr
Mar 27, 4:55 PM CSTTornado WatchSPCBarbour, Blount, Bullock, Calhoun, Chambers, Cherokee and 22 more7 hr
Mar 26, 9:18 PM CSTMesoscale DiscussionSPCEast Carroll, Franklin, Morehouse, Richland, West Carroll57 min
Mar 27, 12:52 AM CSTMesoscale DiscussionSPCAcadia, Allen, Avoyelles, Beauregard, Calcasieu, Cameron and 15 more113 min
Mar 27, 1:35 AM CSTSevere Thunderstorm WatchSPCAcadia, Allen, Avoyelles, Beauregard, Calcasieu, Cameron and 9 more6 hr
Mar 27, 3:48 AM CSTMesoscale DiscussionSPCAcadia, Allen, Beauregard, Calcasieu, Cameron, Evangeline and 8 more87 min
Mar 27, 6:24 AM CSTMesoscale DiscussionSPCAcadia, Allen, Avoyelles, Beauregard, Calcasieu, Cameron and 10 more2 hr
Mar 26, 8:35 PM CSTTornado WatchSPCAmite, Attala, Calhoun, Carroll, Chickasaw, Choctaw and 38 more7 hr
Mar 26, 11:32 PM CSTMesoscale DiscussionSPCAttala, Bolivar, Calhoun, Carroll, Chickasaw, Choctaw and 31 more58 min

Nearby

Mesoscale Discussions in Mississippi, 2005Mesoscale Discussions in Alabama, 2005Mesoscale Discussions in Louisiana, 2005Every mesoscale discussion in 2005

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.