Alert archive / Alabama / Mesoscale Discussions in 2017

Mesoscale Discussion 438

April 5, 201741 counties in Alabama; 32 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Apr 5, 2017, 6:15 AM CDT for 41 counties in Alabama; 32 counties in Georgia. It was in force for 90 min.

The area

The outline as issued.

The facts

Issued
Apr 5, 2017, 6:15 AM CDT (11:15 UTC)
Expired
Apr 5, 2017, 7:45 AM CDT
In force
90 min
Issued by
the Storm Prediction Center
All 73 counties

Autauga County, AL, Barbour County, AL, Bibb County, AL, Bullock County, AL, Butler County, AL, Calhoun County, AL, Chambers County, AL, Cherokee County, AL, Chilton County, AL, Clay County, AL, Cleburne County, AL, Coffee County, AL, Conecuh County, AL, Coosa County, AL, Covington County, AL, Crenshaw County, AL, Dale County, AL, Dallas County, AL, Elmore County, AL, Geneva County, AL, Greene County, AL, Hale County, AL, Henry County, AL, Houston County, AL, Jefferson County, AL, Lee County, AL, Lowndes County, AL, Macon County, AL, Marengo County, AL, Monroe County, AL, Montgomery County, AL, Perry County, AL, Pike County, AL, Randolph County, AL, Russell County, AL, Shelby County, AL, St. Clair County, AL, Talladega County, AL, Tallapoosa County, AL, Tuscaloosa County, AL, Wilcox County, AL, Calhoun County, GA, Carroll County, GA, Chattahoochee County, GA, Clay County, GA, Clayton County, GA, Cobb County, GA, Coweta County, GA, Douglas County, GA, Early County, GA, Fayette County, GA, Fulton County, GA, Haralson County, GA, Harris County, GA, Heard County, GA, Marion County, GA, Meriwether County, GA, Muscogee County, GA, Paulding County, GA, Pike County, GA, Polk County, GA, Quitman County, GA, Randolph County, GA, Schley County, GA, Spalding County, GA, Stewart County, GA, Sumter County, GA, Talbot County, GA, Taylor County, GA, Terrell County, GA, Troup County, GA, Upson County, GA, Webster County, GA

The watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 11.3 hours before the alert went out and 104 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, Birmingham, AL at 00:00Z on 2017-04-05Temperature 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, Birmingham, AL at 00:00Z on 2017-04-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 24 square meters per square second.1939587897117Sfc1 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
2644 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
24 m²/s²
0-3 km storm-relative helicity
84 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 4, 11:54 PM CDTMesoscale DiscussionSPCBaldwin, Butler, Clarke, Coffee, Conecuh, Covington and 8 more2 hr
Apr 5, 1:37 AM CDTSevere Thunderstorm WatchSPCAutauga, Barbour, Bibb, Blount, Bullock, Butler and 42 more6 hr
Apr 5, 3:41 AM CDTMesoscale DiscussionSPCAutauga, Barbour, Bibb, Bullock, Butler, Chambers and 38 more2 hr
Apr 5, 6:54 AM CDTTornado WatchSPCAutauga, Baldwin, Barbour, Bibb, Bullock, Butler and 44 more8 hr
Apr 5, 9:43 AM CDTMesoscale DiscussionSPCBarbour, Chambers, Lee, Macon, Russell, Tallapoosa2 hr
Apr 5, 11:54 AM CDTTornado Watch PDSSPCDale, Geneva, Henry, Houston10 hr
Apr 5, 1:02 PM CDTMesoscale DiscussionSPCBlount, Cullman, DeKalb, Jackson, Jefferson, Lauderdale and 8 more2 hr
Apr 5, 1:50 PM CDTTornado WatchSPCAutauga, Barbour, Bibb, Blount, Bullock, Calhoun and 36 more8 hr
Apr 5, 2:12 PM CDTMesoscale DiscussionSPCBarbour, Bullock, Dale, Henry, Houston, Lee and 2 more93 min
Apr 5, 3:29 PM CDTMesoscale DiscussionSPCBaldwin, Clarke, Conecuh, Escambia, Marengo, Mobile and 3 more3 hr
Apr 5, 3:51 PM CDTMesoscale DiscussionSPCBlount, Calhoun, Chambers, Cherokee, Chilton, Clay and 19 more84 min
Apr 5, 6:57 PM CDTMesoscale DiscussionSPCAutauga, Blount, Bullock, Calhoun, Chambers, Cherokee and 20 more48 min
Apr 5, 9:25 AM CDTMesoscale DiscussionSPCBaldwin, Banks, Barrow, Bartow, Burke, Butts and 45 more95 min
Apr 5, 10:38 AM CDTMesoscale DiscussionSPCAppling, Atkinson, Bacon, Baker, Ben Hill, Berrien and 52 more97 min
Apr 5, 5:29 PM CDTMesoscale DiscussionSPCAppling, Atkinson, Bacon, Berrien, Brantley, Brooks and 22 more61 min

Nearby

Mesoscale Discussions in Alabama, 2017Mesoscale Discussions in Georgia, 2017Every mesoscale discussion in 2017

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.