Alert archive / South Carolina / Special Weather Statements in 2012

Special Weather Statement, NWS Columbia, SC

May 5, 2012Calhoun County, South Carolina

NWS Columbia, SC issued this special weather statement at May 5, 2012, 11:01 PM EDT for Calhoun County, South Carolina. It was in force for 59 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 5, 2012, 11:01 PM EDT (03:01 UTC)
Expired: May 6, 2012, 12:00 AM EDT
In force: 59 min
Issued by: NWS Columbia, SC

County Calhoun County, SC

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 00:00Z, 3.0 hours before the alert went out and 131 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: 1350 J/kg
Mixed-layer CIN: -51 J/kg
Mixed-layer LCL: 1548 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 106 m²/s²
0-3 km storm-relative helicity: 196 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 3.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at May 5, 9:53 PM EDT, 1 hour 8 minutes earlier.

Area forecast discussion, May 5, 9:53 PM EDT, 1 hour 8 minutes before

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Hazardous weather outlook, May 5, 9:45 PM EDT, 1 hour 16 minutes before

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In the hours before

Special weather statement, May 5, 6:43 PM EDT, 4 hours 18 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE COLUMBIA SC
643 PM EDT SAT MAY 5 2012

SCZ031-052345-
SUMTER-
643 PM EDT SAT MAY 5 2012

...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF SUMTER COUNTY THROUGH
745 PM EDT...

AT 642 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM...NEAR WEDGEFIELD...MOVING EAST AT 20 MPH.

SOME LOCATIONS THAT WILL BE AFFECTED INCLUDE...
THE AREA BETWEEN WEDGEFIELD AND SUMTER.

THE STORM WILL LIKELY CONTAIN WIND GUSTS NEAR 45 MPH...ALONG
WITH FREQUENT LIGHTNING AND BRIEF HEAVY DOWNPOURS. SMALL HAIL
MAY ALSO OCCUR.

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 3377 8039 3384 8061 3404 8060 3401 8025
TIME...MOT...LOC 2242Z 278DEG 16KT 3394 8050

Special weather statement, May 5, 9:33 PM EDT, 1 hour 28 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE COLUMBIA SC
933 PM EDT SAT MAY 5 2012

SCZ020-060230-
NEWBERRY-
933 PM EDT SAT MAY 5 2012

...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF NEWBERRY COUNTY
THROUGH 1030 PM EDT...

AT 931 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS IN NORTHERN NEWBERRY COUNTY...AND ALONG THE
NEWBERRY AND LAURENS COUNTY LINE. MOVEMENT WAS SOUTHEASTWARD NEAR
25 MPH.

THE THUNDERSTORMS WILL LIKELY CONTAIN WIND GUSTS NEAR 40 MPH...
FREQUENT LIGHTNING...AND BRIEF HEAVY DOWNPOURS. SMALL HAIL
MAY ALSO OCCUR.

&&

LAT...LON 3426 8191 3430 8190 3432 8186 3435 8183
      3435 8181 3437 8178 3445 8173 3443 8141
      3411 8147 3418 8172 3419 8173 3418 8174
      3423 8193
TIME...MOT...LOC 0131Z 308DEG 27KT 3433 8181

Special weather statement, May 5, 10:02 PM EDT, 59 minutes before

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Special weather statement, May 5, 11:01 PM EDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
May 5, 9:33 PM EDT	Special Weather Statement	CAE	Newberry	57 min
May 5, 10:02 PM EDT	Special Weather Statement	CAE	Lexington	58 min

Nearby

Special Weather Statements in South Carolina, 2012 Every special weather statement 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.