Alert archive / Georgia / Dense Fog Advisories in 2012

Dense Fog Advisory 3, NWS Charleston, SC

January 22, 20128 counties in Georgia; 5 counties in South Carolina

NWS Charleston, SC issued this dense fog advisory at Jan 22, 2012, 1:20 AM EST for 8 counties in Georgia; 5 counties in South Carolina. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued: Jan 22, 2012, 1:20 AM EST (06:20 UTC)
Expired: Jan 22, 2012, 9:00 AM EST
In force: 8 hr
Issued by: NWS Charleston, SC

Counties Bulloch County, GA, Candler County, GA, Effingham County, GA, Evans County, GA, Jenkins County, GA, Long County, GA, Screven County, GA, Tattnall County, GA, Allendale County, SC, Berkeley County, SC, Colleton County, SC, Dorchester County, SC, Hampton County, SC

The radar

The Charleston,SC radar (KCLX), 33 km from the middle of the area, began a volume at 06:23 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

Jacksonville, FL (KJAX), launched 00:00Z, 6.3 hours before the alert went out and 233 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1044 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 115 m²/s²
0-3 km storm-relative helicity: 107 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

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

NWS Charleston, SC wrote its last area forecast discussion before this dense fog advisory went out at Jan 21, 10:36 PM EST, 2 hours 44 minutes earlier.

Area forecast discussion, Jan 21, 10:36 PM EST, 2 hours 44 minutes before

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Hazardous weather outlook, Jan 22, 1:18 AM EST, 2 minutes before

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In the hours before

Special weather statement, Jan 21, 8:08 PM EST, 5 hours 12 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
808 PM EST SAT JAN 21 2012

GAZ117-119-137>141-220200-
COASTAL BRYAN-COASTAL CHATHAM-COASTAL LIBERTY-COASTAL MCINTOSH-INLAND
LIBERTY-INLAND MCINTOSH-LONG-
808 PM EST SAT JAN 21 2012

...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF LIBERTY...BRYAN...
CHATHAM...LONG AND MCINTOSH COUNTIES THROUGH 900 PM EST...

AT 807 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM...8 MILES WEST OF TIBET...MOVING EAST AT 45 MPH.

SOME LOCATIONS THAT WILL BE AFFECTED INCLUDE...
BLACKBEARD ISLAND...CARNIGAN...COX...CRESCENT...DARIEN...EULONIA...
HALFMOON LANDING...HARRIS NECK...JONES...LUDOWICI...MERIDIAN...PINE
HARBOR...RETREAT...RIDGEVILLE...SAPELO ISLAND...SHELLMAN BLUFF...
SOUTH NEWPORT...ST. CATHERINES ISLAND...TIBET...TOWNSEND...VALONA AND
WOLF ISLAND...

PREPARE NOW FOR THE FOLLOWING HAZARDS...
GUSTY WINDS OF 40 TO 50 MPH...
PENNY SIZE HAIL...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

HAVE AN ACTION PLAN READY IN THE EVENT THIS STORM STRENGTHENS OR A
WARNING IS ISSUED. CONTINUE TO MONITOR NOAA WEATHER RADIO ALL HAZARDS
FOR THE LATEST WEATHER INFORMATION.

BE ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS AS STORMS APPROACH.
BE READY TO TAKE IMMEDIATE ACTION IN CASE A SEVERE THUNDERSTORM
WARNING IS ISSUED FOR YOUR LOCATION.

&&

LAT...LON 3132 8136 3130 8142 3136 8154 3143 8161
      3147 8162 3156 8170 3158 8170 3166 8185
      3171 8188 3172 8113 3166 8112 3152 8117
      3140 8125 3137 8124 3137 8127 3130 8125
      3129 8129
TIME...MOT...LOC 0108Z 277DEG 39KT 3159 8172

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 21, 7:01 PM EST	Special Weather Statement	CHS	Tattnall	29 min
Jan 21, 7:15 PM EST	Severe Thunderstorm Warning	CHS	Liberty, Long, Tattnall	45 min
Jan 21, 8:08 PM EST	Special Weather Statement	CHS	McIntosh	52 min

Nearby

Dense Fog Advisories in Georgia, 2012 Dense Fog Advisories in South Carolina, 2012 Every dense fog advisory 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; radar from the NEXRAD Level II archive.