Alert archive / Georgia / Mesoscale Discussions in 2012
Mesoscale Discussion 1002
The Storm Prediction Center issued this mesoscale discussion at Jun 1, 2012, 11:25 AM EDT for 15 counties in Florida; 56 counties in Georgia. It was in force for 95 min.
The area
The outline as issued.
The facts
- Issued
- Jun 1, 2012, 11:25 AM EDT (15:25 UTC)
- Expired
- Jun 1, 2012, 1:00 PM EDT
- In force
- 95 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 40%
All 71 counties
Baker County, FL, Columbia County, FL, Dixie County, FL, Gadsden County, FL, Hamilton County, FL, Jefferson County, FL, Lafayette County, FL, Leon County, FL, Liberty County, FL, Madison County, FL, Nassau County, FL, Suwannee County, FL, Taylor County, FL, Union County, FL, Wakulla County, FL, Appling County, GA, Atkinson County, GA, Bacon County, GA, Baker County, GA, Ben Hill County, GA, Berrien County, GA, Brantley County, GA, Brooks County, GA, Bryan County, GA, Bulloch County, GA, Calhoun County, GA, Camden County, GA, Candler County, GA, Charlton County, GA, Chatham County, GA, Clinch County, GA, Coffee County, GA, Colquitt County, GA, Cook County, GA, Crisp County, GA, Decatur County, GA, Dodge County, GA, Dougherty County, GA, Early County, GA, Echols County, GA, Emanuel County, GA, Evans County, GA, Glynn County, GA, Grady County, GA, Irwin County, GA, Jeff Davis County, GA, Lanier County, GA, Laurens County, GA, Lee County, GA, Liberty County, GA, Long County, GA, Lowndes County, GA, McIntosh County, GA, Miller County, GA, Mitchell County, GA, Montgomery County, GA, Pierce County, GA, Seminole County, GA, Tattnall County, GA, Telfair County, GA, Terrell County, GA, Thomas County, GA, Tift County, GA, Toombs County, GA, Treutlen County, GA, Turner County, GA, Ware County, GA, Wayne County, GA, Wheeler County, GA, Wilcox County, GA, Worth County, GA
The nearest sounding before it
Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 3.4 hours before the alert went out and 136 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
- 1139 J/kg
- Mixed-layer CIN
- -5 J/kg
- Mixed-layer LCL
- 624 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 36 m²/s²
- 0-3 km storm-relative helicity
- 28 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.1
The text
As transmitted, in the capitals the NWS used until 2016.
768
ACUS11 KWNS 011525
SWOMCD
SPC MCD 011525
SCZ000-GAZ000-FLZ000-011700-
MESOSCALE DISCUSSION 1002
NWS STORM PREDICTION CENTER NORMAN OK
1025 AM CDT FRI JUN 01 2012
AREAS AFFECTED...NRN FL...SRN GA
CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE
VALID 011525Z - 011700Z
PROBABILITY OF WATCH ISSUANCE...40 PERCENT
SUMMARY...THUNDERSTORMS WILL INCREASE IN AREAL COVERAGE AND
INTENSITY AS THEY SPREAD/DEVELOP ACROSS SRN GA/NRN FL INTO THE EARLY
AFTERNOON HOURS. ISOLATED DAMAGING WINDS AND PERHAPS SOME HAIL MAY
OCCUR WITH THE STRONGEST STORMS.
DISCUSSION...REMNANT MCV FROM OVERNIGHT CONVECTION IS SHEARING NEWD
AT ROUGHLY 25KT ACROSS SERN AL INTO SWRN GA. IT APPEARS DIURNAL
HEATING IS NOW CONTRIBUTING GREATLY TO THE RECENT INCREASE IN TSTM
ACTIVITY ALONG LEADING EDGE OF DEBRIS CANOPY AND CONVECTIVE OUTFLOW.
GIVEN THE MODEST DEEP LAYER SHEAR AND THE EXPECTED GRADUAL INCREASE
IN CONVECTION AHEAD OF THIS FEATURE A SLIGHT RISK WILL BE ADDED TO
THIS REGION TO ACCOUNT FOR ISOLATED DAMAGING WINDS AND PERHAPS SOME
HAIL. CURRENT SPEED OF THIS FEATURE SUGGESTS THE BACK EDGE OF
FORCING WITH MCV WILL PROGRESS INTO SERN GA BY 21Z.
..DARROW/CARBIN.. 06/01/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...CHS...JAX...FFC...TAE...
LAT...LON 31678485 32778194 31908075 30658121 29428344 30008518
31678485Nearby
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.