Alert archive / Georgia / Mesoscale Discussions in 2011
Mesoscale Discussion 17
The Storm Prediction Center issued this mesoscale discussion at Jan 10, 2011, 2:06 AM CST for 8 counties in Alabama; 71 counties in Georgia; 12 counties in South Carolina. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Jan 10, 2011, 2:06 AM CST (08:06 UTC)
- Expired
- Jan 10, 2011, 8:00 AM CST
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 91 counties
Barbour County, AL, Bullock County, AL, Chambers County, AL, Lee County, AL, Macon County, AL, Pike County, AL, Russell County, AL, Tallapoosa County, AL, Baldwin County, GA, Bibb County, GA, Bleckley County, GA, Bulloch County, GA, Burke County, GA, Butts County, GA, Candler County, GA, Chattahoochee County, GA, Clay County, GA, Clayton County, GA, Columbia County, GA, Coweta County, GA, Crawford County, GA, Crisp County, GA, Dodge County, GA, Dooly County, GA, Emanuel County, GA, Fayette County, GA, Glascock County, GA, Greene County, GA, Hancock County, GA, Harris County, GA, Heard County, GA, Henry County, GA, Houston County, GA, Jasper County, GA, Jefferson County, GA, Jenkins County, GA, Johnson County, GA, Jones County, GA, Lamar County, GA, Laurens County, GA, Lee County, GA, Macon County, GA, Marion County, GA, McDuffie County, GA, Meriwether County, GA, Monroe County, GA, Montgomery County, GA, Morgan County, GA, Muscogee County, GA, Newton County, GA, Peach County, GA, Pike County, GA, Pulaski County, GA, Putnam County, GA, Quitman County, GA, Randolph County, GA, Richmond County, GA, Rockdale County, GA, Schley County, GA, Screven County, GA, Spalding County, GA, Stewart County, GA, Sumter County, GA, Talbot County, GA, Taliaferro County, GA, Taylor County, GA, Telfair County, GA, Terrell County, GA, Treutlen County, GA, Troup County, GA, Turner County, GA, Twiggs County, GA, Upson County, GA, Warren County, GA, Washington County, GA, Webster County, GA, Wheeler County, GA, Wilcox County, GA, Wilkinson County, GA, Aiken County, SC, Allendale County, SC, Bamberg County, SC, Barnwell County, SC, Berkeley County, SC, Calhoun County, SC, Clarendon County, SC, Colleton County, SC, Dorchester County, SC, Hampton County, SC, Orangeburg County, SC, Williamsburg County, SC
The radar
The Robins AFB radar (KJGX), 18 km from the middle of the area, began a volume at 08:09 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
Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 8.1 hours before the alert went out and 143 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2113 m above ground
- 0-6 km bulk shear
- 74 kt
- 0-1 km storm-relative helicity
- 122 m²/s²
- 0-3 km storm-relative helicity
- 239 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
583
ACUS11 KWNS 100807
SWOMCD
SPC MCD 100806
SCZ000-GAZ000-ALZ000-101400-
MESOSCALE DISCUSSION 0017
NWS STORM PREDICTION CENTER NORMAN OK
0206 AM CST MON JAN 10 2011
AREAS AFFECTED...ERN AL...CNTRL GA...CNTRL SC
CONCERNING...WINTER MIXED PRECIPITATION
VALID 100806Z - 101400Z
SIGNIFICANT WINTER PRECIPITATION WILL CHANGE PHASE OVER MUCH OF THE
AREA THROUGH MORNING WITH SIGNIFICANT ICING AND SLEET LIKELY.
FREEZING RAIN RATES SHOULD AVERAGE 0.05 TO 0.10 IN/HR.
A SURFACE LOW WILL CONTINUE EWD ACROSS THE NERN GULF OF MEXICO WITH
INTENSE LOW LEVEL WARM ADVECTION PROFILES DEVELOPING INLAND ATOP A
COLD AIR MASS. AT 07Z...THE SURFACE FREEZING LINE EXTENDED FROM MGM
TO JUST N OF MCN AND INTO CNTRL SC. HOWEVER...THE SURFACE WET BULB
ZERO LINE WAS MUCH FARTHER S SUGGESTING BOUNDARY LAYER COOLING WILL
TAKE PLACE ONCE PRECIPITATION BEGINS. THEREFORE...AREAS CURRENTLY
JUST S OF THE FREEZING LINE WILL LIKELY CHANGE OVER TO FREEZING
RAIN...WITH AREAS ALONG AND JUST N OF THE CURRENT FREEZING LINE
EXPERIENCING THE LONGEST DURATION.
TO THE N...SNOW ACROSS NRN GA AND INTO CNTRL SC MAY EVENTUALLY
SWITCH OVER TO SLEET AS A WARM NOSE FORMS ALOFT...WITH ACCUMULATING
SLEET POSSIBLE.
..JEWELL.. 01/10/2011
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...ILM...CHS...CAE...FFC...TAE...BMX...
LAT...LON 31568504 31658564 31858606 32228608 32988577 33488524
33778459 33608358 33648171 33818033 33877919 33697907
33417937 32518125 32088245 31878293 31658370 31568504SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 9, 8:07 PM CST | Mesoscale Discussion | SPC | Colbert, DeKalb, Franklin, Jackson, Lauderdale, Lawrence and 4 more | 5 hr |
| Jan 9, 8:27 PM CST | Mesoscale Discussion | SPC | Autauga, Bibb, Blount, Calhoun, Chambers, Cherokee and 23 more | 5 hr |
| Jan 9, 10:56 PM CST | Mesoscale Discussion | SPC | DeKalb, Jackson | 5 hr |
| Jan 10, 10:27 AM CST | Mesoscale Discussion | SPC | Aiken, Allendale, Bamberg, Barnwell, Berkeley, Calhoun and 24 more | 6 hr |
Nearby
Mesoscale Discussions in Georgia, 2011Mesoscale Discussions in South Carolina, 2011Mesoscale Discussions in Alabama, 2011Every mesoscale discussion in 2011
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.