Alert archive / Georgia / Mesoscale Discussions in 2011
Mesoscale Discussion 217
The Storm Prediction Center issued this mesoscale discussion at Mar 9, 2011, 2:04 PM EST for Nassau County, Florida; 40 counties in Georgia. It was in force for 26 min.
The area
The outline as issued.
The facts
- Issued
- Mar 9, 2011, 2:04 PM EST (19:04 UTC)
- Expired
- Mar 9, 2011, 2:30 PM EST
- In force
- 26 min
- Issued by
- the Storm Prediction Center
All 41 counties
Nassau County, FL, Appling County, GA, Atkinson County, GA, Bacon County, GA, Ben Hill County, GA, Berrien County, GA, Bleckley County, GA, Brantley County, GA, Bryan County, GA, Bulloch County, GA, Camden County, GA, Candler County, GA, Charlton County, GA, Chatham County, GA, Clinch County, GA, Coffee County, GA, Dodge County, GA, Echols County, GA, Emanuel County, GA, Evans County, GA, Glynn County, GA, Irwin County, GA, Jeff Davis County, GA, Johnson County, GA, Lanier County, GA, Laurens County, GA, Liberty County, GA, Long County, GA, Lowndes County, GA, McIntosh County, GA, Montgomery County, GA, Pierce County, GA, Pulaski County, GA, Tattnall County, GA, Telfair County, GA, Toombs County, GA, Treutlen County, GA, Ware County, GA, Wayne County, GA, Wheeler County, GA, Wilcox County, GA
The watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Jacksonville, FL (KJAX), launched 12:00Z, 7.1 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 783 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 142 m²/s²
- 0-3 km storm-relative helicity
- 244 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
423
ACUS11 KWNS 091904
SWOMCD
SPC MCD 091904
SCZ000-GAZ000-FLZ000-091930-
MESOSCALE DISCUSSION 0217
NWS STORM PREDICTION CENTER NORMAN OK
0104 PM CST WED MAR 09 2011
AREAS AFFECTED...SRN-SERN GA
CONCERNING...SEVERE POTENTIAL...SEVERE THUNDERSTORM WATCH LIKELY
VALID 091904Z - 091930Z
A SEVERE TSTM WATCH WILL BE COORDINATED SHORTLY FOR SRN-SERN GA FOR
THE LIKELIHOOD OF A DAMAGING WIND THREAT SPREADING EWD ACROSS THIS
REGION THROUGH THE AFTERNOON AND EARLY EVENING. RECENT TRENDS IN
RADAR IMAGERY INDICATED AN EWD ACCELERATION TO 40 KT OF THE BOWING
LINE...CURRENTLY LOCATED OVER SWRN GA.
GIVEN THIS INCREASED DAMAGING WIND THREAT WITH EWD EXTENT THE 20Z
DAY 1 CONVECTIVE OUTLOOK WILL BE ADDING THE REST OF SRN GA TO THE
SLIGHT RISK AREA. FOR ADDITIONAL SHORT TERM MESOSCALE DETAILS ABOUT
THIS ONGOING BOWING LINE AND ATTENDANT SEVERE WEATHER
THREAT...PLEASE REFER TO SPC MESOSCALE DISCUSSION #216.
..PETERS.. 03/09/2011
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...CHS...JAX...FFC...TAE...
LAT...LON 32798335 32618196 32188106 31668105 30658148 30558212
30668331 32088358 32798335SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 9, 8:26 AM EST | Tornado Watch | SPC | Escambia, Okaloosa, Santa Rosa | 6 hr |
| Mar 9, 9:32 AM EST | Mesoscale Discussion | SPC | Bay, Calhoun, Franklin, Gadsden, Gulf, Holmes and 8 more | 28 min |
| Mar 9, 9:39 AM EST | Tornado Watch | SPC | Bay, Calhoun, Franklin, Gadsden, Gulf, Holmes and 7 more | 7 hr |
| Mar 9, 10:31 AM EST | Mesoscale Discussion | SPC | Bay, Calhoun, Escambia, Franklin, Gadsden, Gulf and 10 more | 59 min |
| Mar 9, 12:09 PM EST | Mesoscale Discussion | SPC | Escambia, Okaloosa, Santa Rosa | 66 min |
| Mar 9, 1:38 PM EST | Mesoscale Discussion | SPC | Bay, Calhoun, Franklin, Gadsden, Gulf, Holmes and 7 more | 67 min |
| Mar 9, 4:14 PM EST | Mesoscale Discussion | SPC | Madison | 31 min |
| Mar 9, 2:21 PM EST | Severe Thunderstorm Watch | SPC | Appling, Atkinson, Bacon, Brantley, Bryan, Bulloch and 29 more | 6 hr |
| Mar 9, 4:38 PM EST | Mesoscale Discussion | SPC | Brantley, Bryan, Bulloch, Camden, Charlton, Chatham and 14 more | 67 min |
Nearby
Mesoscale Discussions in Georgia, 2011Mesoscale Discussions in Florida, 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.