Alert archive / Georgia / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 51, NWS Columbia, SC

May 20, 2008McDuffie County, Georgia

NWS Columbia, SC issued this severe thunderstorm warning at May 20, 2008, 3:08 PM EDT for McDuffie County, Georgia. It was in force for 52 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
May 20, 2008, 3:08 PM EDT (19:08 UTC)
Expired
May 20, 2008, 4:00 PM EDT
In force
52 min
Issued by
NWS Columbia, SC
Area
Storm-based polygon

County McDuffie County, GA

The radar

The Robins AFB radar (KJGX), 121 km from the middle of the area, began a volume at 19:08 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
May 20, 2:59 PM EDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 7.1 hours before the alert went out and 188 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.

Skew-T log-pSkew-T log-p diagram, Peachtre/Fal Fld, GA at 12:00Z on 2008-05-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 572 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Peachtre/Fal Fld, GA at 12:00Z on 2008-05-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 225 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
572 J/kg
Mixed-layer CIN
-199 J/kg
Mixed-layer LCL
979 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
225 m²/s²
0-3 km storm-relative helicity
251 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.3

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Columbia, SC wrote its last area forecast discussion before this severe thunderstorm warning went out at May 20, 1:36 PM EDT, 1 hour 32 minutes earlier.

Area forecast discussion, May 20, 1:36 PM EDT, 1 hour 32 minutes before
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Hazardous weather outlook, May 20, 3:04 PM EDT, 4 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE COLUMBIA SC
304 PM EDT TUE MAY 20 2008

GAZ040-063>065-077-SCZ015-016-018-020>022-025>031-035>038-041-211000-
LINCOLN-MCDUFFIE-COLUMBIA-RICHMOND-BURKE-LANCASTER-CHESTERFIELD-
MCCORMICK-NEWBERRY-FAIRFIELD-KERSHAW-EDGEFIELD-SALUDA-LEXINGTON-
RICHLAND-LEE-AIKEN-SUMTER-BARNWELL-ORANGEBURG-CALHOUN-CLARENDON-
BAMBERG-
304 PM EDT TUE MAY 20 2008

...LAKE WIND ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING...
...SEVERE THUNDERSTORM WATCH 328 IN EFFECT UNTIL 10 PM EDT THIS
EVENING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL GEORGIA AND
CENTRAL SOUTH CAROLINA.

.DAY ONE...THIS AFTERNOON AND TONIGHT

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   LAKE WIND ADVISORY.
   SEVERE THUNDERSTORM WATCH.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL LIKELY BE NEEDED.

The office that day

Everything else NWS Columbia, SC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 20, 3:50 AM EDTLake Wind AdvisoryCAEAiken, Bamberg, Barnwell, Calhoun, Chesterfield, Clarendon and 10 more16 hr
May 20, 3:47 PM EDTSevere Thunderstorm WarningCAEAiken58 min
May 20, 4:17 PM EDTSevere Thunderstorm WarningCAEBarnwell58 min
May 20, 4:34 PM EDTSevere Thunderstorm WarningCAEBamberg56 min
May 20, 4:40 PM EDTSevere Thunderstorm WarningCAECalhoun, Lexington, Orangeburg65 min
May 20, 5:02 PM EDTSevere Thunderstorm WarningCAECalhoun, Clarendon, Richland, Sumter48 min
May 20, 5:04 PM EDTTornado WarningCAEBamberg, Barnwell41 min
May 20, 6:19 PM EDTSevere Thunderstorm WarningCAEBarnwell41 min
May 20, 7:00 PM EDTSevere Thunderstorm WarningCAESaluda60 min
May 20, 7:19 PM EDTSevere Thunderstorm WarningCAEEdgefield, McCormick41 min
May 20, 7:34 PM EDTSevere Thunderstorm WarningCAELexington, Newberry, Richland41 min
May 20, 7:56 PM EDTSevere Thunderstorm WarningCAELexington, Saluda49 min
May 20, 3:23 PM EDTSevere Thunderstorm WarningCAEColumbia35 min
May 20, 3:39 PM EDTSevere Thunderstorm WarningCAERichmond35 min
May 20, 5:23 PM EDTSevere Thunderstorm WarningCAEMcDuffie37 min
May 20, 5:33 PM EDTSevere Thunderstorm WarningCAEColumbia, Richmond42 min
May 20, 5:44 PM EDTSevere Thunderstorm WarningCAEBurke, Richmond46 min
May 20, 6:31 PM EDTTornado WarningCAEBurke44 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2008Every severe thunderstorm warning in 2008

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.