Alert archive / Alabama / Mesoscale Discussions in 2013

Mesoscale Discussion 1289

June 28, 20134 states

The Storm Prediction Center issued this mesoscale discussion at Jun 28, 2013, 1:11 PM CDT for 4 states. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued
Jun 28, 2013, 1:11 PM CDT (18:11 UTC)
Expired
Jun 28, 2013, 2:45 PM CDT
In force
94 min
Issued by
the Storm Prediction Center
All 65 counties

Autauga County, AL, Baldwin County, AL, Barbour County, AL, Bullock County, AL, Butler County, AL, Chambers County, AL, Chilton County, AL, Choctaw County, AL, Clarke 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, Escambia County, AL, Geneva County, AL, Greene County, AL, Hale County, AL, Henry County, AL, Houston County, AL, Lee County, AL, Lowndes County, AL, Macon County, AL, Marengo County, AL, Mobile County, AL, Monroe County, AL, Montgomery County, AL, Perry County, AL, Pike County, AL, Russell County, AL, Sumter County, AL, Tallapoosa County, AL, Washington County, AL, Wilcox County, AL, Holmes County, FL, Baker County, GA, Calhoun County, GA, Chattahoochee County, GA, Clay County, GA, Decatur County, GA, Early County, GA, Harris County, GA, Marion County, GA, Meriwether County, GA, Miller County, GA, Muscogee County, GA, Pike County, GA, Quitman County, GA, Randolph County, GA, Seminole County, GA, Stewart County, GA, Talbot County, GA, Terrell County, GA, Troup County, GA, Webster County, GA, Clarke County, MS, George County, MS, Greene County, MS, Kemper County, MS, Lauderdale County, MS, Perry County, MS, Wayne County, MS

The radar

The Mobile radar (KMOB), 146 km from the middle of the area, began a volume at 18:11 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

Birmingham, AL (KBMX), launched 12:00Z, 6.2 hours before the alert went out and 178 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 12:00Z on 2013-06-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 4271 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, Birmingham, AL at 12:00Z on 2013-06-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -52 square meters per square second.1939Sfc1 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
4271 J/kg
Mixed-layer CIN
-24 J/kg
Mixed-layer LCL
667 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
-52 m²/s²
0-3 km storm-relative helicity
-62 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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
Jun 28, 6:16 AM CDTMesoscale DiscussionSPCColbert, Cullman, Fayette, Franklin, Greene, Lamar and 9 more89 min
Jun 28, 9:42 AM CDTMesoscale DiscussionSPCBibb, Blount, Chilton, Choctaw, Cullman, Dallas and 17 more2 hr
Jun 28, 11:26 AM CDTSevere Thunderstorm WatchSPCAutauga, Baldwin, Barbour, Bibb, Bullock, Butler and 36 more9 hr
Jun 28, 3:23 PM CDTMesoscale DiscussionSPCBaldwin, Barbour, Choctaw, Clarke, Coffee, Conecuh and 9 more97 min
Jun 28, 5:25 PM CDTSevere Thunderstorm WatchSPCAutauga, Chilton, Dallas, Greene, Hale, Lowndes and 4 more7 hr
Jun 28, 1:36 PM CDTMesoscale DiscussionSPCAppling, Bacon, Brantley, Bryan, Bulloch, Candler and 11 more84 min
Jun 28, 2:05 PM CDTMesoscale DiscussionSPCBaldwin, Banks, Barrow, Bibb, Bleckley, Burke and 52 more2 hr
Jun 28, 4:17 AM CDTMesoscale DiscussionSPCBenton, DeSoto, Marshall, Tate, Tippah, Tunica58 min
Jun 28, 5:18 AM CDTSevere Thunderstorm WatchSPCAlcorn, Benton, Calhoun, Chickasaw, Coahoma, DeSoto and 16 more8 hr
Jun 28, 12:34 PM CDTMesoscale DiscussionSPCAttala, Bolivar, Carroll, Claiborne, Coahoma, Copiah and 15 more2 hr
Jun 28, 4:41 PM CDTMesoscale DiscussionSPCAttala, Carroll, Choctaw, Grenada, Hinds, Holmes and 16 more94 min

Nearby

Mesoscale Discussions in Alabama, 2013Mesoscale Discussions in Georgia, 2013Mesoscale Discussions in Mississippi, 2013Every mesoscale discussion in 2013

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.