Alert archive / Georgia / Mesoscale Discussions in 2004

Mesoscale Discussion 1020

May 31, 20045 states

The Storm Prediction Center issued this mesoscale discussion at May 31, 2004, 1:06 PM CDT for 5 states. It was in force for 54 min.

The area

The outline as issued.

The facts

Issued
May 31, 2004, 1:06 PM CDT (18:06 UTC)
Expired
May 31, 2004, 2:00 PM CDT
In force
54 min
Issued by
the Storm Prediction Center
All 74 counties

Baldwin County, AL, Coffee County, AL, Conecuh County, AL, Covington County, AL, Dale County, AL, Escambia County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Mobile County, AL, Washington County, AL, Escambia County, FL, Gadsden County, FL, Holmes County, FL, Jackson County, FL, Okaloosa County, FL, Santa Rosa County, FL, Walton County, FL, Washington County, FL, Baker County, GA, Ben Hill County, GA, Berrien County, GA, Brooks County, GA, Calhoun County, GA, Clay County, GA, Colquitt County, GA, Cook County, GA, Decatur County, GA, Dougherty County, GA, Early County, GA, Grady County, GA, Irwin County, GA, Lanier County, GA, Lowndes County, GA, Miller County, GA, Mitchell County, GA, Randolph County, GA, Seminole County, GA, Terrell County, GA, Thomas County, GA, Tift County, GA, Turner County, GA, Worth County, GA, Ascension Parish, LA, East Baton Rouge Parish, LA, East Feliciana Parish, LA, Iberville Parish, LA, Livingston Parish, LA, Orleans Parish, LA, Pointe Coupee Parish, LA, Saint Helena Parish, LA, Saint James Parish, LA, Saint John the Baptist Parish, LA, Saint Martin Parish, LA, Saint Tammany Parish, LA, Tangipahoa Parish, LA, Washington Parish, LA, West Baton Rouge Parish, LA, West Feliciana Parish, LA, Amite County, MS, Forrest County, MS, George County, MS, Greene County, MS, Hancock County, MS, Harrison County, MS, Jackson County, MS, Lamar County, MS, Marion County, MS, Pearl River County, MS, Perry County, MS, Pike County, MS, Stone County, MS, Walthall County, MS, Wilkinson County, MS

The radar

The Mobile radar (KMOB), 4 km from the middle of the area, began a volume at 18:09 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

Slidell Radar S, LA (KSIL), launched 12:00Z, 6.1 hours before the alert went out and 152 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, Slidell Radar S, LA at 12:00Z on 2004-05-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1274 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, Slidell Radar S, LA at 12:00Z on 2004-05-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 104 square meters per square second.193958Sfc1 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
1274 J/kg
Mixed-layer CIN
-64 J/kg
Mixed-layer LCL
701 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
104 m²/s²
0-3 km storm-relative helicity
164 m²/s²
Significant tornado parameter
0.4
Supercell composite
2.6

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
May 30, 8:54 PM CDTMesoscale DiscussionSPCColbert, Franklin, Lamar, Lauderdale, Lawrence, Limestone and 2 more66 min
May 30, 9:15 PM CDTTornado WatchSPCBlount, Colbert, Cullman, DeKalb, Etowah, Fayette and 13 more7 hr
May 30, 11:05 PM CDTMesoscale DiscussionSPCColbert, Franklin, Jackson, Lauderdale, Lawrence, Limestone and 4 more55 min
May 31, 12:40 AM CDTTornado WatchSPCCherokee5 hr
May 31, 1:06 AM CDTMesoscale DiscussionSPCBlount, Cullman, DeKalb, Etowah, Fayette, Franklin and 11 more84 min
May 31, 3:40 AM CDTMesoscale DiscussionSPCCherokee95 min
May 31, 3:45 AM CDTTornado WatchSPCAutauga, Bibb, Calhoun, Chambers, Chilton, Clay and 17 more5 hr
May 31, 5:31 AM CDTMesoscale DiscussionSPCAutauga, Bibb, Calhoun, Chambers, Chilton, Clay and 17 more119 min
May 31, 9:21 AM CDTMesoscale DiscussionSPCBaldwin, Coffee, Conecuh, Covington, Crenshaw, Dale and 8 more54 min
May 31, 10:00 AM CDTTornado WatchSPCBaldwin, Coffee, Conecuh, Covington, Dale, Escambia and 5 more6 hr
May 31, 3:30 PM CDTTornado WatchSPCDale, Geneva, Henry, Houston4 hr
May 31, 10:18 AM CDTMesoscale DiscussionSPCNassau27 min
May 31, 10:40 AM CDTSevere Thunderstorm WatchSPCHamilton6 hr
May 31, 1:27 PM CDTMesoscale DiscussionSPCHamilton63 min
May 31, 2:10 PM CDTSevere Thunderstorm WatchSPCAlachua, Baker, Bradford, Clay, Columbia, Duval and 5 more5 hr
May 31, 5:28 PM CDTMesoscale DiscussionSPCAlachua, Baker, Bradford, Clay, Columbia, Duval and 3 more92 min
May 31, 5:59 PM CDTMesoscale DiscussionSPCBay, Calhoun, Gadsden, Jefferson, Leon, Liberty and 1 more61 min
May 31, 6:30 PM CDTTornado WatchSPCBaker, Bradford, Clay, Columbia, Duval, Hamilton and 5 more4 hr
May 31, 8:10 AM CDTSevere Thunderstorm WatchSPCBurke, Columbia, Elbert, Glascock, Greene, Hancock and 12 more5 hr
May 30, 8:55 PM CDTMesoscale DiscussionSPCAvoyelles, Bienville, Bossier, Caddo, Caldwell, Catahoula and 23 more65 min
May 30, 10:35 PM CDTTornado WatchSPCBienville, Bossier, Caddo, Claiborne, De Soto, East Carroll and 10 more5 hr
May 31, 1:27 AM CDTMesoscale DiscussionSPCBienville, Caldwell, De Soto, East Carroll, Franklin, Jackson and 7 more2 hr
May 30, 10:55 PM CDTTornado WatchSPCAlcorn, Attala, Benton, Bolivar, Calhoun, Carroll and 31 more5 hr

Nearby

Mesoscale Discussions in Georgia, 2004Mesoscale Discussions in Louisiana, 2004Mesoscale Discussions in Mississippi, 2004Every mesoscale discussion in 2004

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.