Alert archive / Georgia / Mesoscale Discussions in 2012
Mesoscale Discussion 349
The Storm Prediction Center issued this mesoscale discussion at Mar 24, 2012, 4:19 PM EDT for 10 counties in Florida; 12 counties in Georgia. It was in force for 86 min.
The area
The outline as issued.
The facts
- Issued
- Mar 24, 2012, 4:19 PM EDT (20:19 UTC)
- Expired
- Mar 24, 2012, 5:45 PM EDT
- In force
- 86 min
- Issued by
- the Storm Prediction Center
All 22 counties
Baker County, FL, Bradford County, FL, Clay County, FL, Columbia County, FL, Duval County, FL, Hamilton County, FL, Nassau County, FL, Saint Johns County, FL, Suwannee County, FL, Union County, FL, Brantley County, GA, Camden County, GA, Charlton County, GA, Clinch County, GA, Echols County, GA, Glynn County, GA, Liberty County, GA, Long County, GA, McIntosh County, GA, Pierce County, GA, Ware County, GA, Wayne County, GA
The nearest sounding before it
Jacksonville, FL (KJAX), launched 12:00Z, 8.3 hours before the alert went out and 74 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
- 139 J/kg
- Mixed-layer CIN
- -87 J/kg
- Mixed-layer LCL
- 982 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 90 m²/s²
- 0-3 km storm-relative helicity
- 121 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
551
ACUS11 KWNS 242019
SWOMCD
SPC MCD 242019
GAZ000-FLZ000-242145-
MESOSCALE DISCUSSION 0349
NWS STORM PREDICTION CENTER NORMAN OK
0319 PM CDT SAT MAR 24 2012
AREAS AFFECTED...FAR SOUTHEAST GA/NORTHEAST FL
CONCERNING...SEVERE THUNDERSTORM WATCH 104...
VALID 242019Z - 242145Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 104
CONTINUES.
SEVERE TSTM WATCH 104 CONTINUES UNTIL 23Z...WITH DAMAGING WINDS
REMAINING POSSIBLE ON AN ISOLATED BASIS.
SCATTERED CLUSTERS OF TSTMS PERSIST THIS AFTERNOON WITH A
SOUTHWEST-NORTHEAST CORRIDOR ACROSS NORTH FL INTO FAR SOUTHEAST GA.
SEVERAL FACTOR SEEMS TO BE LEADING TO A LIMITED SEVERE
THREAT...INCLUDING GRADUALLY VEERING FLOW ABOVE THE SURFACE/ABATING
CONVERGENCE ALONG WITH CONVECTIVE OVERTURNING/AMPLE CLOUD COVER. A
SEVERE THREAT REMAINS ON AN ISOLATED BASIS...BUT SHOULD GENERALLY
REMAIN LIMITED IN MAGNITUDE/EXTENT. FARTHER NORTHWEST...POTENTIAL
DOES REMAIN FOR SOME ADDITIONAL DEEP CONVECTIVE DEVELOPMENT ALONG
THE SYNOPTIC COLD FRONT...AND/OR WHERE IT INTERCEPTS OUTFLOW/ZONE OF
DIFFERENTIAL HEATING. WITH A MODESTLY CONFLUENT REGIME AND A
WARM/RECOVERED AIRMASS...SOME ADDITIONAL STRONG STORM DEVELOPMENT
COULD OCCUR ON THE NORTHERN FRINGE OF THE THICKER CLOUD
COVER/PRECIPITATION NEAR/AHEAD OF THE COLD FRONT.
..GUYER.. 03/24/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...CHS...JAX...TAE...
LAT...LON 31238290 31878190 31898091 29868131 29748289 30538334
31238290SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 24, 10:16 AM EDT | Mesoscale Discussion | SPC | Alachua, Baker, Bradford, Clay, Columbia, Duval and 8 more | 59 min |
| Mar 24, 10:45 AM EDT | Severe Thunderstorm Watch | SPC | Alachua, Baker, Bradford, Clay, Columbia, Duval and 7 more | 8 hr |
| Mar 24, 12:29 PM EDT | Mesoscale Discussion | SPC | Alachua, Baker, Bradford, Clay, Columbia, Duval and 4 more | 61 min |
| Mar 24, 6:25 PM EDT | Mesoscale Discussion | SPC | Alachua, Baker, Bradford, Citrus, Clay, Columbia and 11 more | 65 min |
| Mar 24, 4:16 PM EDT | Mesoscale Discussion | SPC | Richmond | 59 min |
| Mar 24, 5:52 PM EDT | Mesoscale Discussion | SPC | Chattooga, Dade, Walker | 53 min |
Nearby
Mesoscale Discussions in Georgia, 2012Mesoscale Discussions in Florida, 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.