Alert archive / Georgia / Mesoscale Discussions in 2012
Mesoscale Discussion 229
The Storm Prediction Center issued this mesoscale discussion at Mar 3, 2012, 4:47 AM CST for 6 counties in Alabama; 16 counties in Florida; 24 counties in Georgia. It was in force for 58 min.
The area
The outline as issued.
The facts
- Issued
- Mar 3, 2012, 4:47 AM CST (10:47 UTC)
- Expired
- Mar 3, 2012, 5:45 AM CST
- In force
- 58 min
- Issued by
- the Storm Prediction Center
All 46 counties
Coffee County, AL, Covington County, AL, Dale County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Bay County, FL, Calhoun County, FL, Escambia County, FL, Franklin County, FL, Gadsden County, FL, Gulf County, FL, Holmes County, FL, Jackson County, FL, Jefferson County, FL, Leon County, FL, Liberty County, FL, Okaloosa County, FL, Santa Rosa County, FL, Wakulla County, FL, Walton County, FL, Washington County, FL, Baker County, GA, Berrien County, GA, Brooks County, GA, Calhoun County, GA, Clay County, GA, Colquitt County, GA, Cook 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, Sumter County, GA, Terrell County, GA, Thomas County, GA, Tift County, GA, Turner County, GA, Webster County, GA, Worth County, GA
The radar
The Eglin Afb radar (KEVX), 58 km from the middle of the area, began a volume at 10:49 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 watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 10.8 hours before the alert went out and 105 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.
- Mixed-layer CAPE
- 585 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 549 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- 141 m²/s²
- 0-3 km storm-relative helicity
- 174 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 2.0
The text
As transmitted, in the capitals the NWS used until 2016.
343
ACUS11 KWNS 031048
SWOMCD
SPC MCD 031047
GAZ000-FLZ000-ALZ000-031145-
MESOSCALE DISCUSSION 0229
NWS STORM PREDICTION CENTER NORMAN OK
0447 AM CST SAT MAR 03 2012
AREAS AFFECTED...FL PANHANDLE...SRN AL...SW GA
CONCERNING...TORNADO WATCH 67...
VALID 031047Z - 031145Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 67 CONTINUES.
AN ISOLATED TORNADO THREAT MAY DEVELOP ACROSS PARTS OF SW GA...SE AL
AND THE FL PANHANDLE TOWARD DAYBREAK. WW ISSUANCE MAY BE NEEDED
LATER THIS MORNING AS CELLS INCREASE IN COVERAGE. WW 67 WILL BE
ALLOWED TO EXPIRE AT 11Z.
CONVECTION IS STARTING TO INCREASE IN COVERAGE FROM THE FL PANHANDLE
NEWD ACROSS SW GA ACROSS A WARM SECTOR WITH SFC DEWPOINTS IN THE MID
TO UPPER 60S F. THIS ACTIVITY IS WELL AHEAD OF COLD FRONT WHICH WILL
MOVE INTO THE FL PANHANDLE THIS MORNING. AS THE COLD FRONT
APPROACHES...A LINE OF CONVECTION SHOULD GRADUALLY ORGANIZE AS IS
SUGGESTED BY SHORT-TERM MODEL FORECASTS. IN ADDITION...A LOW-LEVEL
JET MAX IS FORECAST TO DEVELOP ACROSS NRN FL THIS MORNING HELPING
SHEAR PROFILES TO BECOME MORE FAVORABLE FOR STORM ROTATION. ALTHOUGH
THE MORE SUBSTANTIAL TORNADO THREAT SHOULD BE DELAYED UNTIL LATER
MORNING AS SFC TEMPS WARM...AN ISOLATED TORNADO THREAT CAN NOT BE
RULED OUT AROUND DAYBREAK DUE TO THE LOW-LEVEL SHEAR ENVIRONMENT
ALREADY IN PLACE.
..BROYLES.. 03/03/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...FFC...TAE...BMX...MOB...
LAT...LON 32128397 32008501 31338665 30738760 30338760 30208688
30328618 30018556 29628531 29538496 29908437 30258365
31248304 32128397SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 2, 7:18 PM CST | Mesoscale Discussion | SPC | Blount, Cullman, DeKalb, Fayette, Greene, Jackson and 12 more | 57 min |
| Mar 2, 10:07 PM CST | Mesoscale Discussion | SPC | Autauga, Bibb, Calhoun, Chambers, Cherokee, Chilton and 25 more | 113 min |
| Mar 2, 10:56 PM CST | Tornado Watch | SPC | Autauga, Baldwin, Barbour, Bibb, Bullock, Butler and 31 more | 6 hr |
| Mar 3, 6:35 AM CST | Tornado Watch | SPC | Geneva, Houston | 6 hr |
| Mar 3, 9:12 AM CST | Mesoscale Discussion | SPC | Bay, Calhoun, Gadsden, Hamilton, Jefferson, Leon and 3 more | 93 min |
| Mar 3, 11:45 AM CST | Mesoscale Discussion | SPC | Alachua, Baker, Bradford, Clay, Columbia, Duval and 15 more | 60 min |
| Mar 3, 12:04 PM CST | Tornado Watch | SPC | Alachua, Baker, Bradford, Calhoun, Clay, Columbia and 17 more | 5 hr |
| Mar 3, 3:30 PM CST | Mesoscale Discussion | SPC | Baker, Columbia, Hamilton, Lafayette, Nassau, Suwannee and 2 more | 90 min |
| Mar 2, 7:15 PM CST | Mesoscale Discussion | SPC | Catoosa, Dade, Fannin, Gilmer, Murray, Rabun and 4 more | 90 min |
| Mar 2, 8:36 PM CST | Mesoscale Discussion | SPC | Baker, Calhoun, Colquitt, Cook, Decatur, Dougherty and 6 more | 54 min |
| Mar 2, 9:54 PM CST | Tornado Watch | SPC | Banks, Barrow, Bartow, Butts, Carroll, Catoosa and 61 more | 6 hr |
| Mar 2, 11:40 PM CST | Mesoscale Discussion | SPC | Banks, Barrow, Bartow, Carroll, Cherokee, Clarke and 30 more | 95 min |
| Mar 3, 2:58 AM CST | Mesoscale Discussion | SPC | Burke, Columbia, Glascock, Jefferson, Jenkins, Lincoln and 6 more | 92 min |
| Mar 3, 3:39 AM CST | Severe Thunderstorm Watch | SPC | Burke, Columbia, Lincoln, McDuffie, Richmond | 4 hr |
Nearby
Mesoscale Discussions in Georgia, 2012Mesoscale Discussions in Florida, 2012Mesoscale Discussions in Alabama, 2012Every 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.