Alert archive / South Carolina / Heat Advisories in 2011

Heat Advisory 20, NWS Columbia, SC

August 8, 201112 counties in South Carolina; Burke County, Richmond County, Georgia

NWS Columbia, SC issued this heat advisory at Aug 8, 2011, 9:47 PM EDT for 12 counties in South Carolina; Burke County, Richmond County, Georgia. It took effect at Aug 9, 2011, 12:00 PM EDT. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued: Aug 8, 2011, 9:47 PM EDT (01:47 UTC)
In effect from: Aug 9, 2011, 12:00 PM EDT
Expired: Aug 9, 2011, 7:00 PM EDT
In force: 7 hr
Issued by: NWS Columbia, SC

Counties Burke County, GA, Richmond County, GA, Aiken County, SC, Bamberg County, SC, Barnwell County, SC, Calhoun County, SC, Chesterfield County, SC, Clarendon County, SC, Edgefield County, SC, Kershaw County, SC, Lee County, SC, Lexington County, SC, Richland County, SC, Sumter County, SC

The radar

The Columbia radar (KCAE), 23 km from the middle of the area, began a volume at 01:50 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

Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 1.8 hours before the alert went out and 279 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: 126 J/kg
Mixed-layer CIN: -70 J/kg
Mixed-layer LCL: 1998 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 21 m²/s²
0-3 km storm-relative helicity: 46 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 heat advisory 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 heat advisory went out at Aug 8, 9:40 PM EDT, 7 minutes earlier.

Area forecast discussion, Aug 8, 9:40 PM EDT, 7 minutes before

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Hazardous weather outlook, Aug 8, 5:16 AM EDT, 16 hours 31 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE COLUMBIA SC
516 AM EDT MON AUG 8 2011

GAZ040-063>065-077-SCZ015-016-018-020>022-025>031-035>038-041-090930-
LINCOLN-MCDUFFIE-COLUMBIA-RICHMOND-BURKE-LANCASTER-CHESTERFIELD-
MCCORMICK-NEWBERRY-FAIRFIELD-KERSHAW-EDGEFIELD-SALUDA-LEXINGTON-
RICHLAND-LEE-AIKEN-SUMTER-BARNWELL-ORANGEBURG-CALHOUN-CLARENDON-
BAMBERG-
516 AM EDT MON AUG 8 2011

...HEAT ADVISORY IN EFFECT FROM 1 PM THIS AFTERNOON TO 7 PM EDT THIS
EVENING...

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

.DAY ONE...TODAY AND TONIGHT.

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

   HEAT ADVISORY.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

In the hours before

Special weather statement, Aug 8, 8:18 PM EDT, 1 hour 29 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE COLUMBIA SC
818 PM EDT MON AUG 8 2011

SCZ015-090100-
LANCASTER-
818 PM EDT MON AUG 8 2011

...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF LANCASTER COUNTY
THROUGH 900 PM EDT...

AT 816 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS...ALONG A LINE EXTENDING FROM 17 MILES NORTH OF
LANCASTER TO 18 MILES SOUTHWEST OF IRWIN...MOVING EAST AT 20 MPH.

SOME LOCATIONS THAT WILL BE AFFECTED INCLUDE...
ELGIN...HEATH SPRINGS...IRWIN AND LANCASTER...

PREPARE NOW FOR THE FOLLOWING HAZARDS...
GUSTY WINDS OF 30 TO 40 MPH...
FREQUENT CLOUD TO GROUND LIGHTNING...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REPORT LARGE HAIL...DAMAGING WINDS OR FLOODING TO YOUR COUNTY
SHERIFF...OR CALL THE NATIONAL WEATHER SERVICE TOLL FREE AT 1...8 7
7...6 3 3...6 7 7 2.

&&

LAT...LON 3494 8078 3482 8079 3482 8057 3454 8066
      3460 8090 3464 8090 3470 8086 3475 8088
      3479 8088 3483 8091 3484 8087 3490 8088
      3492 8087 3501 8091 3507 8091
TIME...MOT...LOC 0017Z 271DEG 17KT 3496 8067 3452 8105

SMITH

Special weather statement, Aug 8, 8:27 PM EDT, 1 hour 20 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE COLUMBIA SC
827 PM EDT MON AUG 8 2011

GAZ063>065-090115-
COLUMBIA-MCDUFFIE-RICHMOND-
827 PM EDT MON AUG 8 2011

...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF RICHMOND...MCDUFFIE
AND COLUMBIA COUNTIES THROUGH 915 PM EDT...

AT 827 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM...NEAR DEARING...MOVING SOUTHEAST AT 15 MPH.

SOME LOCATIONS THAT WILL BE AFFECTED INCLUDE...
EVANS...FORT GORDON...GROVETOWN...HARLEM AND THOMSON...

PREPARE NOW FOR THE FOLLOWING HAZARDS...
GUSTY WINDS OF 30 TO 40 MPH...
FREQUENT CLOUD TO GROUND LIGHTNING...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REPORT LARGE HAIL...DAMAGING WINDS OR FLOODING TO YOUR COUNTY
SHERIFF...OR CALL THE NATIONAL WEATHER SERVICE TOLL FREE AT 1...8 7
7...6 3 3...6 7 7 2.

&&

LAT...LON 3365 8254 3348 8201 3328 8226 3329 8231
      3331 8234 3331 8239 3334 8245 3334 8250
      3335 8255 3341 8255 3346 8260 3361 8265
TIME...MOT...LOC 0027Z 299DEG 12KT 3341 8244

SMITH

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 8, 8:18 PM EDT	Special Weather Statement	CAE	Lancaster	42 min
Aug 9, 3:59 PM EDT	Special Weather Statement	CAE	Aiken	61 min
Aug 9, 4:30 PM EDT	Special Weather Statement	CAE	Bamberg, Barnwell	60 min
Aug 9, 5:14 PM EDT	Special Weather Statement	CAE	Lexington	61 min
Aug 9, 5:31 PM EDT	Special Weather Statement	CAE	Bamberg, Barnwell, Orangeburg	59 min
Aug 9, 5:58 PM EDT	Severe Thunderstorm Warning	CAE	Calhoun, Orangeburg	62 min
Aug 9, 6:38 PM EDT	Severe Thunderstorm Warning	CAE	Calhoun, Clarendon, Orangeburg	67 min
Aug 9, 6:42 PM EDT	Severe Thunderstorm Warning	CAE	Fairfield, Lexington, Newberry, Richland	63 min
Aug 9, 7:35 PM EDT	Special Weather Statement	CAE	Lexington, Richland	55 min
Aug 8, 8:27 PM EDT	Special Weather Statement	CAE	Columbia, McDuffie	48 min
Aug 9, 5:06 PM EDT	Special Weather Statement	CAE	Jenkins	39 min

Nearby

Heat Advisories in South Carolina, 2011 Heat Advisories in Georgia, 2011 Every heat advisory 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; radar from the NEXRAD Level II archive.