Alert archive / Georgia / Mesoscale Discussions in 2012

Mesoscale Discussion 1035

June 3, 201217 counties in Alabama; 26 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Jun 3, 2012, 4:39 PM CDT for 17 counties in Alabama; 26 counties in Georgia. It was in force for 66 min.

The area

The outline as issued.

The facts

Issued: Jun 3, 2012, 4:39 PM CDT (21:39 UTC)
Expired: Jun 3, 2012, 5:45 PM CDT
In force: 66 min
Issued by: the Storm Prediction Center
Chance of a watch: 95%

All 43 counties

Autauga County, AL, Bibb County, AL, Bullock County, AL, Chambers County, AL, Chilton County, AL, Coosa County, AL, Dallas County, AL, Elmore County, AL, Hale County, AL, Lee County, AL, Lowndes County, AL, Macon County, AL, Montgomery County, AL, Perry County, AL, Russell County, AL, Tallapoosa County, AL, Wilcox County, AL, Carroll County, GA, Chattahoochee County, GA, Clayton County, GA, Cobb County, GA, Coweta County, GA, DeKalb County, GA, Douglas County, GA, Fayette County, GA, Fulton County, GA, Haralson County, GA, Harris County, GA, Heard County, GA, Henry County, GA, Lamar County, GA, Marion County, GA, Meriwether County, GA, Muscogee County, GA, Paulding County, GA, Pike County, GA, Polk County, GA, Rockdale County, GA, Spalding County, GA, Talbot County, GA, Taylor County, GA, Troup County, GA, Upson County, GA

The watches that followed

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

Severe Thunderstorm Watch 346Jun 3, 5:00 PM CDT

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 9.7 hours before the alert went out and 96 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 12 J/kg
Mixed-layer CIN: -97 J/kg
Mixed-layer LCL: 1374 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 112 m²/s²
0-3 km storm-relative helicity: 232 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.

682 
ACUS11 KWNS 032139
SWOMCD
SPC MCD 032139 
GAZ000-ALZ000-032245-

MESOSCALE DISCUSSION 1035
NWS STORM PREDICTION CENTER NORMAN OK
0439 PM CDT SUN JUN 03 2012

AREAS AFFECTED...PORTIONS OF CNTRL AL INTO W-CNTRL GA

CONCERNING...SEVERE POTENTIAL...WATCH LIKELY 

VALID 032139Z - 032245Z

PROBABILITY OF WATCH ISSUANCE...95 PERCENT

SUMMARY...DAMAGING WIND AND MARGINALLY SEVERE HAIL THREAT MAY
CONTINUE FOR A FEW MORE HOURS. A NEW SVR WATCH MAY BE NEEDED SOON TO
THE SOUTH AND EAST OF SVR WW 344.

DISCUSSION...A NEW SEVERE WATCH MAY BE NEEDED TO THE SOUTH AND EAST
OF SVR WW 344. A MOIST...UNSTABLE DOWNSTREAM AIRMASS WITH MODEST
DEEP LAYER SHEAR AND STEEP LOW LEVEL LAPSE RATES INTO CNTRL/SRN AL
AND W-CNTRL GA MAY SUPPORT CONTINUED DAMAGING WIND THREAT FOR AT
LEAST A FEW MORE HOURS. COOL TEMPERATURES ALOFT MAY ALSO SUPPORT
MARGINALLY SEVERE HAIL IN STRONGEST CELLS AS WELL. WITH LITTLE IN
THE WAY OF UPPER LEVEL SUPPORT TO AID IN DEEP LAYER FORCING FOR
ASCENT AND SLIGHT WEAKENING OF DEEP LAYER SHEAR FURTHER TO THE SOUTH
AND EAST INTO CNTRL GA AND SRN AL...STORMS SHOULD GRADUALLY WEAKEN
LATER THIS EVENING WITH THE LOSS OF DAYTIME HEATING AND INCREASING
CINH.

..LEITMAN/CORFIDI.. 06/03/2012

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

ATTN...WFO...FFC...BMX...MOB...

LAT...LON   34068504 33928538 33278527 33158570 33118661 32988786
            32058771 31888667 31988546 32178473 32598414 32938391
            33888406 34098450 34068504

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 3, 1:11 PM CDT	Mesoscale Discussion	SPC	Blount, Calhoun, Cherokee, Clay, Colbert, Coosa and 17 more	64 min
Jun 3, 1:26 PM CDT	Severe Thunderstorm Watch	SPC	Bibb, Blount, Calhoun, Chambers, Chilton, Clay and 27 more	5 hr
Jun 3, 3:47 PM CDT	Mesoscale Discussion	SPC	Bibb, Blount, Calhoun, Clay, Cleburne, Cullman and 10 more	88 min
Jun 3, 5:00 PM CDT	Severe Thunderstorm Watch	SPC	Chattahoochee, Coweta, Crawford, Harris, Heard, Lamar and 14 more	115 min
Jun 3, 6:51 PM CDT	Mesoscale Discussion	SPC	Chattahoochee, Crawford, Harris, Heard, Lamar, Macon and 14 more	54 min

Nearby

Mesoscale Discussions in Georgia, 2012 Mesoscale Discussions in Alabama, 2012 Every mesoscale discussion in 2012

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.