Alert archive / Alabama / Mesoscale Discussions in 2012

Mesoscale Discussion 1044

June 3, 20124 states

The Storm Prediction Center issued this mesoscale discussion at Jun 3, 2012, 11:13 PM CDT for 4 states. It was in force for 62 min.

The area

The outline as issued.

The facts

Issued: Jun 3, 2012, 11:13 PM CDT (04:13 UTC)
Expired: Jun 4, 2012, 12:15 AM CDT
In force: 62 min
Issued by: the Storm Prediction Center

All 32 counties

Blount County, AL, Cherokee County, AL, Colbert County, AL, Cullman County, AL, DeKalb County, AL, Etowah County, AL, Franklin County, AL, Jackson County, AL, Lauderdale County, AL, Lawrence County, AL, Limestone County, AL, Madison County, AL, Marion County, AL, Marshall County, AL, Morgan County, AL, Winston County, AL, Chattooga County, GA, Dade County, GA, Floyd County, GA, Gordon County, GA, Walker County, GA, Whitfield County, GA, Alcorn County, MS, Benton County, MS, Itawamba County, MS, Lee County, MS, Prentiss County, MS, Tippah County, MS, Tishomingo County, MS, Union County, MS, Hardin County, TN, McNairy County, TN

The radar

The Northeast Alabama radar (KHTX), 87 km from the middle of the area, began a volume at 04:15 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, 4.2 hours before the alert went out and 155 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: 561 J/kg
Mixed-layer CIN: -123 J/kg
Mixed-layer LCL: 1537 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 139 m²/s²
0-3 km storm-relative helicity: 236 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

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

340 
ACUS11 KWNS 040413
SWOMCD
SPC MCD 040413 
GAZ000-ALZ000-TNZ000-MSZ000-040515-

MESOSCALE DISCUSSION 1044
NWS STORM PREDICTION CENTER NORMAN OK
1113 PM CDT SUN JUN 03 2012

AREAS AFFECTED...NERN MS...NRN AL...FAR SRN TN...NWRN GA

CONCERNING...TORNADO WATCH 348...

VALID 040413Z - 040515Z

THE SEVERE WEATHER THREAT FOR TORNADO WATCH 348 CONTINUES.

SUMMARY...ALTHOUGH THE THREAT FOR TORNADOES APPEARS TO HAVE
DIMINISHED ALONG WITH OVERALL SEVERE POTENTIAL...ISOLATED DAMAGING
WINDS AND MARGINALLY SEVERE HAIL SHOULD PERSIST FOR THE NEXT FEW
HOURS WITH AN E/SEWD EVOLVING MCS ALONG THE TN/MS/AL BORDER AREA.

DISCUSSION...PRIMARY SEVERE RISK EXISTS ON SWRN FLANK OF MCS WHERE
ORIENTATION OF HIGHER REFLECTIVITY MORE NORMAL TO THE NEARLY
UNIDIRECTIONAL DEEP-LAYER WLYS WILL FAVOR A RISK FOR DAMAGING WINDS
AND MARGINALLY SEVERE HAIL. GIVEN THE COLD POOL CONFIGURATION...THIS
SHOULD YIELD A MORE SERN PROPAGATION WITH TIME AS THE FEED OF
STRONGER INSTABILITY OCCURS FROM W/SW IN MS. WITH ERN EXTENT...THE
PARALLELING ORIENTATION OF CONVECTION WITH THE DEEP-LAYER FLOW ALONG
WITH WEAKER INSTABILITY SHOULD PRECLUDE A SUBSTANTIAL SEVERE RISK
INTO NWRN GA BEYOND MARGINALLY SEVERE HAIL.

..GRAMS.. 06/04/2012

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

ATTN...WFO...FFC...OHX...BMX...HUN...MEG...

LAT...LON   35108906 35308819 35078712 34978644 34908562 34888526
            34858494 34708469 34438476 34158491 33858564 33768654
            33878750 34028801 34188859 34368909 34738928 35108906

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 3, 7:09 PM CDT	Tornado Watch	SPC	Colbert, Franklin, Lauderdale, Lawrence, Limestone, Morgan	7 hr
Jun 3, 8:34 PM CDT	Mesoscale Discussion	SPC	Colbert, Lauderdale, Lawrence, Limestone	56 min
Jun 4, 3:14 AM CDT	Mesoscale Discussion	SPC	Colbert, Franklin	91 min
Jun 4, 5:33 AM CDT	Mesoscale Discussion	SPC	Autauga, Barbour, Bibb, Blount, Bullock, Butler and 29 more	87 min
Jun 4, 8:43 AM CDT	Mesoscale Discussion	SPC	Barbour, Bullock, Chambers, Elmore, Henry, Lee and 5 more	2 hr
Jun 4, 12:09 PM CDT	Severe Thunderstorm Watch	SPC	Appling, Atkinson, Bacon, Ben Hill, Berrien, Brantley and 39 more	3 hr
Jun 4, 5:06 PM CDT	Mesoscale Discussion	SPC	Bolivar, Carroll, Coahoma, Hinds, Holmes, Humphreys and 11 more	114 min
Jun 4, 2:38 PM CDT	Mesoscale Discussion	SPC	Henry, Houston, Montgomery, Robertson, Stewart	2 hr
Jun 4, 3:25 PM CDT	Severe Thunderstorm Watch	SPC	Benton, Cheatham, Davidson, Dickson, Henry, Houston and 8 more	7 hr
Jun 4, 6:27 PM CDT	Mesoscale Discussion	SPC	Benton, Cheatham, Davidson, Dickson, Henry, Houston and 10 more	93 min

Nearby

Mesoscale Discussions in Alabama, 2012 Mesoscale Discussions in Mississippi, 2012 Mesoscale Discussions in Georgia, 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; radar from the NEXRAD Level II archive.