Alert archive / Georgia / Mesoscale Discussions in 2004

Mesoscale Discussion 41

January 26, 200413 counties in Alabama; 11 counties in Florida; 18 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Jan 26, 2004, 7:00 AM CST for 13 counties in Alabama; 11 counties in Florida; 18 counties in Georgia. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jan 26, 2004, 7:00 AM CST (13:00 UTC)
Expired: Jan 26, 2004, 9:00 AM CST
In force: 2 hr
Issued by: the Storm Prediction Center

All 42 counties

Baldwin County, AL, Barbour County, AL, Butler County, AL, Coffee County, AL, Conecuh County, AL, Covington County, AL, Crenshaw County, AL, Dale County, AL, Escambia County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Pike County, AL, Bay County, FL, Calhoun County, FL, Escambia County, FL, Gadsden County, FL, Holmes County, FL, Jackson County, FL, Liberty County, FL, Okaloosa County, FL, Santa Rosa County, FL, Walton County, FL, Washington County, FL, Baker County, GA, Calhoun County, GA, Clay County, GA, Crisp 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, Terrell County, GA, Turner County, GA, Wilcox County, GA, Worth County, GA

The watches that followed

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

Tornado Watch 3Jan 26, 9:30 AM CST

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 1.0 hours before the alert went out and 175 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: 549 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 470 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 219 m²/s²
0-3 km storm-relative helicity: 281 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 4.5

Open this sounding in Storm Lab

The text

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

474 
ACUS11 KWNS 261301
SWOMCD
SPC MCD 261300 
GAZ000-FLZ000-ALZ000-MSZ000-261500-

MESOSCALE DISCUSSION 0041
NWS STORM PREDICTION CENTER NORMAN OK
0700 AM CST MON JAN 26 2004

AREAS AFFECTED...SRN AL/SWRN GA AND THE FL PNHDL

CONCERNING...TORNADO WATCH 2...

VALID 261300Z - 261500Z

THE POTENTIAL FOR ISOLATED TORNADOES/DAMAGING WINDS IS EXPECTED TO
CONTINUE FOR THE NEXT SEVERAL HOURS EWD ACROSS WW AREA.

AS OF 1240Z...REGIONAL RADAR MOSAIC SHOWED A LINE OF STRONG TO
SEVERE TSTMS FROM AROUND CSG SWWD TO NEAR PNS. WHILE OVERALL LINE
MOVEMENT IS SLOWLY TO THE E...INDIVIDUAL STORMS EMBEDDED WITHIN THE
LINE /SOME OF WHICH HAVE EXHIBITED MID-LEVEL ROTATION/ WERE MOVING
NE AT AROUND 50KTS. SLY LOW-LEVEL FLOW AHEAD OF ONGOING CONVECTION
CONTINUES TO ADVECT HIGHER THETAE AIRMASS NWD OFF THE GULF WITH 12Z
TLH SOUNDING INDICATING MLCAPES OF 500-600 J/KG. DYNAMIC FORCING
AHEAD OF APPROACHING MID-LEVEL TROUGH COUPLED WITH ADDITIONAL
MOISTENING/LIMITED DIABATIC HEATING OF BOUNDARY-LAYER SHOULD
CONTRIBUTE FURTHER TO THE DESTABILIZATION PROCESS EWD ACROSS THE WW
AREA THROUGH 15 OR 16Z. 

IN ADDITION...LOCAL VWP TRENDS FROM FORT RUCKER/EGLIN AFB INDICATE
BACKING OF NEAR SURFACE WIND FIELDS /PRIMARILY BELOW 1KM/ WHICH IS
RESULTING IN 0-1KM SRH VALUES OF 100-200 M2/S2. GIVEN THE INCREASING
INSTABILITY AND LOW-LEVEL SHEAR...THE POTENTIAL FOR SUPERCELLS
EMBEDDED WITHIN AND/OR DEVELOPING AHEAD OF THE LINE APPEARS TO BE
INCREASING. ISOLATED TORNADOES AND DAMAGING WINDS WILL REMAIN THE
PRIMARY SEVERE WEATHER THREATS. EXCESSIVE RAINFALL WILL ALSO BE
LIKELY WITHIN TRAILING PORTION OF CONVECTIVE LINE OWING TO TRAINING
CELLS/SLOW LINE MOVEMENT.

..MEAD.. 01/26/2004

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

ATTN...WFO...FFC...TAE...BMX...MOB...LIX...

31808681 32058633 32028336 31818325 30068503 29938549
29938810 30098854

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jan 26, 2:10 AM CST	Mesoscale Discussion	SPC	Baldwin, Barbour, Butler, Coffee, Conecuh, Covington and 7 more	3 hr
Jan 26, 4:15 AM CST	Tornado Watch	SPC	Baldwin, Barbour, Butler, Coffee, Conecuh, Covington and 7 more	6 hr
Jan 26, 9:30 AM CST	Tornado Watch	SPC	Dale, Geneva, Henry, Houston	6 hr
Jan 26, 11:10 AM CST	Mesoscale Discussion	SPC	Bay, Gulf	65 min
Jan 26, 2:00 PM CST	Mesoscale Discussion	SPC	Baker, Columbia, Hamilton, Jefferson, Lafayette, Madison and 4 more	60 min
Jan 26, 3:15 AM CST	Mesoscale Discussion	SPC	Clarke, Columbia, Elbert, Glascock, Greene, Hancock and 14 more	6 hr
Jan 26, 4:57 PM CST	Mesoscale Discussion	SPC	Banks, Barrow, Clarke, Elbert, Franklin, Greene and 13 more	5 hr

Nearby

Mesoscale Discussions in Georgia, 2004 Mesoscale Discussions in Alabama, 2004 Mesoscale Discussions in Florida, 2004 Every mesoscale discussion in 2004

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.