Alert archive / Alabama / Mesoscale Discussions in 2014

Mesoscale Discussion 910

June 8, 20144 states

The Storm Prediction Center issued this mesoscale discussion at Jun 8, 2014, 7:09 PM CDT for 4 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jun 8, 2014, 7:09 PM CDT (00:09 UTC)
Expired
Jun 8, 2014, 9:15 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
All 75 counties

Autauga County, AL, Barbour County, AL, Bibb County, AL, Bullock County, AL, Butler County, AL, Chilton County, AL, Choctaw County, AL, Clarke County, AL, Clay 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, Jefferson County, AL, Lowndes County, AL, Macon County, AL, Marengo County, AL, Monroe County, AL, Montgomery County, AL, Perry County, AL, Pickens County, AL, Pike County, AL, Shelby County, AL, Sumter County, AL, Talladega County, AL, Tallapoosa County, AL, Tuscaloosa County, AL, Wilcox County, AL, Bay County, FL, Calhoun County, FL, Escambia County, FL, Gadsden County, FL, Holmes County, FL, Jackson County, FL, Jefferson County, FL, Leon County, FL, Liberty County, FL, Madison County, FL, Okaloosa County, FL, Santa Rosa County, FL, Wakulla County, FL, Walton County, FL, Washington County, FL, Baker County, GA, Brooks County, GA, Calhoun County, GA, Clay County, GA, Colquitt County, GA, Decatur County, GA, Dougherty County, GA, Early County, GA, Grady County, GA, Lee County, GA, Miller County, GA, Mitchell County, GA, Quitman County, GA, Randolph County, GA, Seminole County, GA, Stewart County, GA, Terrell County, GA, Thomas County, GA, Worth County, GA, Kemper County, MS, Lauderdale County, MS, Noxubee County, MS

The radar

The Ft Rucker radar (KEOX), 99 km from the middle of the area, began a volume at 00:12 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 00:00Z, 0.2 hours before the alert went out and 161 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 2014-06-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1385 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 00:00Z on 2014-06-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -34 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
1385 J/kg
Mixed-layer CIN
-38 J/kg
Mixed-layer LCL
1147 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
-34 m²/s²
0-3 km storm-relative helicity
32 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

505 
ACUS11 KWNS 090010
SWOMCD
SPC MCD 090009 
FLZ000-GAZ000-ALZ000-MSZ000-090215-

MESOSCALE DISCUSSION 0910
NWS STORM PREDICTION CENTER NORMAN OK
0709 PM CDT SUN JUN 08 2014

AREAS AFFECTED...CENTRAL MISSISSIPPI...CENTRAL/SOUTHERN
ALABAMA...SOUTHWESTERN GEORGIA...AND THE FLORIDA PANHANDLE

CONCERNING...SEVERE THUNDERSTORM WATCH 259...261...

VALID 090009Z - 090215Z

THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH
259...261...CONTINUES.

SUMMARY...THE THREAT FOR ISOLATED SEVERE HAIL AND DAMAGING WINDS
SHOULD DIMINISH OVER THE NEXT 1-2 HOURS WITH THE LOSS OF DAYTIME
HEATING.

DISCUSSION...RECENT RADAR TRENDS CONTINUE TO SHOW AN OVERALL
WEAKENING TREND FOR THUNDERSTORMS...AS INDICATED BY COLD POOLS
SURGING AWAY FROM PARENT THUNDERSTORMS. WITH THE LOSS OF DAYTIME
HEATING AND WEAK DEEP-LAYER SHEAR...WIDESPREAD ADDITIONAL
THUNDERSTORM DEVELOPMENT IS NOT ANTICIPATED IN THE SHORT-TERM.
HOWEVER...GIVEN THE PRESENCE OF STRONG INSTABILITY...A NEAR TERM
ISOLATED SEVERE THREAT WILL PERSIST WITH THE STRONGEST THUNDERSTORM
CORES.

LATER THIS EVENING...INTO THE OVERNIGHT HOURS...THE THREAT FOR
SEVERE WEATHER MAY INCREASE AGAIN ACROSS CENTRAL ALABAMA AS AN
APPROACHING MESOSCALE CONVECTIVE VORTEX /CURRENTLY LOCATED ACROSS
NORTHERN LOUISIANA/ COMBINES WITH THE STRONG INSTABILITY TO SUPPORT
THUNDERSTORM REDEVELOPMENT.

..MARSH.. 06/09/2014

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...JAX...FFC...TAE...BMX...MOB...JAN...

LAT...LON   30308321 30108401 29988510 30038562 30398736 31218794
            31718843 32198866 32538870 32988870 33298849 33668813
            33708720 33578567 32208535 31828375 30308321

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 9, 2:07 AM CDTMesoscale DiscussionSPCColbert, Fayette, Franklin, Lamar, Marion, Pickens83 min
Jun 9, 4:54 PM CDTMesoscale DiscussionSPCColbert, Cullman, Fayette, Franklin, Greene, Lamar and 11 more96 min
Jun 9, 5:16 PM CDTSevere Thunderstorm WatchSPCAutauga, Bibb, Blount, Calhoun, Chambers, Cherokee and 20 more8 hr
Jun 9, 5:19 PM CDTMesoscale DiscussionSPCColbert, Franklin, Lauderdale, Lawrence, Marion26 min
Jun 9, 5:30 PM CDTTornado WatchSPCColbert, Cullman, Fayette, Franklin, Lamar, Lauderdale and 6 more8 hr
Jun 9, 6:55 PM CDTMesoscale DiscussionSPCColbert, Fayette, Franklin, Lamar, Lauderdale, Lawrence and 5 more95 min
Jun 9, 1:43 PM CDTMesoscale DiscussionSPCBurke, Columbia, Effingham, Lincoln, Richmond, Screven3 hr
Jun 8, 7:47 PM CDTMesoscale DiscussionSPCAdams, Attala, Bolivar, Calhoun, Carroll, Chickasaw and 33 more88 min
Jun 8, 8:41 PM CDTSevere Thunderstorm WatchSPCAlcorn, Attala, Benton, Bolivar, Calhoun, Carroll and 46 more7 hr
Jun 8, 10:53 PM CDTMesoscale DiscussionSPCAlcorn, Attala, Benton, Bolivar, Calhoun, Carroll and 42 more97 min
Jun 9, 9:39 AM CDTMesoscale DiscussionSPCBolivar, Humphreys, Issaquena, Sharkey, Sunflower, Washington and 1 more2 hr
Jun 9, 11:40 AM CDTSevere Thunderstorm WatchSPCAttala, Bolivar, Carroll, Claiborne, Coahoma, Grenada and 18 more7 hr
Jun 9, 1:54 PM CDTMesoscale DiscussionSPCAlcorn, Attala, Benton, Bolivar, Calhoun, Carroll and 25 more96 min
Jun 9, 2:14 PM CDTTornado WatchSPCAlcorn, Benton, Coahoma, DeSoto, Lafayette, Marshall and 7 more5 hr
Jun 9, 3:22 PM CDTMesoscale DiscussionSPCAdams, Attala, Bolivar, Carroll, Choctaw, Claiborne and 15 more83 min
Jun 9, 3:43 PM CDTMesoscale DiscussionSPCBenton, DeSoto, Lafayette, Marshall, Panola, Quitman and 4 more92 min

Nearby

Mesoscale Discussions in Alabama, 2014Mesoscale Discussions in Georgia, 2014Mesoscale Discussions in Florida, 2014Every mesoscale discussion in 2014

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.