Alert archive / South Carolina / Special Weather Statements in 2012
Special Weather Statement, NWS Columbia, SC
NWS Columbia, SC issued this special weather statement at May 9, 2012, 12:46 PM EDT for Lexington County, South Carolina. It was in force for 44 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 9, 2012, 12:46 PM EDT (16:46 UTC)
- Expired
- May 9, 2012, 1:30 PM EDT
- In force
- 44 min
- Issued by
- NWS Columbia, SC
County Lexington County, SC
The radar
The Columbia radar (KCAE), 16 km from the middle of the area, began a volume at 16:45 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
Charleston AFB, SC (KCHS), launched 12:00Z, 4.8 hours before the alert went out and 171 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
- 484 J/kg
- Mixed-layer CIN
- -17 J/kg
- Mixed-layer LCL
- 666 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 39 m²/s²
- 0-3 km storm-relative helicity
- 50 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>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 9, 12:11 PM EDT, 35 minutes earlier.
Area forecast discussion, May 9, 12:11 PM EDT, 35 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE COLUMBIA SC 1211 PM EDT WED MAY 9 2012 .SYNOPSIS... A COLD FRONT WILL MOVE THROUGH THE REGION THIS AFTERNOON... INCREASING OUR CHANCES OF SHOWER AND THUNDERSTORM ACTIVITY. DRIER AIR AND HIGH PRESSURE WILL BUILD IN BEHIND THE FRONT...PROVIDING FAIR WEATHER THURSDAY THROUGH SATURDAY. && .NEAR TERM /THROUGH TONIGHT/... A LINE OF SHOWERS AND THUNDERSTORMS ARE IN THE PROCESS OF MOVING THROUGH THE WESTERN PART OF THE FORECAST AREA EARLY THIS AFTERNOON AND MORE CONVECTIVE ACTIVITY IS EXPECTED AS AIRMASS BECOMES MARGINALLY UNSTABLE THIS AFTERNOON. SPC HAS CAE CWA IN A SLIGHT RISK AREA THIS AFTERNOON BUT WITH PREVAILING CLOUD COVER AND ONLY MARGINAL INSTABILITY...THINK LESS COVERAGE A BETTER POSSIBILITY. WILL KEEP THE HIGH CHANCES OF PRECIPITATION THIS AFTERNOON 80 TO 100 PERCENT. TEMPERATURES ARE RIGHT AS FORECAST. SO...NO CHANGES TO HIGHS. KEPT 100 PERCENT THROUGH 5 PM BUT LOWERED TO 60 PERCENT BY 6 PM WHEN NIGHT-TIME PERIOD BEGINS AS COLD FRONT IS EXPECTED TO MOVE THROUGH. OTHERWISE...A 20-30 PERCENT CHANCE WEST PART BEFORE MIDNIGHT AS ACTIVITY MAY LINGER IN A FEW SPOTS...40-50 PERCENT CHANCE EAST PART. THEN...WILL DROP MENTION AFTER MIDNIGHT WEST PART AND LOWER TO 20 PERCENT IN THE EAST UNTIL IT IS GONE AROUND 5 AM THURSDAY MORNING. SPC MAINTAINS A SLIGHT RISK OF SEVERE THUNDERSTORMS FOR OUR FA TODAY...THOUGH INSTABILITY APPEARS WILL BE LIMITED BY CLOUD COVER/PRECIP...AND ONLY WEAK UPPER ENERGY EXPECTED TODAY/EARLY TONIGHT AHEAD OF THE MAIN UPPER TROUGH DIGGING SOUTHEASTWARD WHICH WILL LAG BEHIND THE SYSTEM. BEST CHANCES FOR LATE THIS AFTERNOON AND EARLY THIS EVENING APPEAR TO BE FROM OGB TO CHS WHERE THE WARM AIR ADVECTION IS THE STRONGEST. VERY LATE IN PERIOD TONIGHT NEAR DAYBREAK THURSDAY... DRIER CONDITIONS EXPECTED AS HIGH PRESSURE BEGINS TO BUILD OVER THE REGION. && .SHORT TERM /THURSDAY THROUGH SATURDAY NIGHT/... FAIR WEATHER EXPECTED. HIGH PRESSURE WILL BUILD INTO THE EAST COAST WITH A DRY ATMOSPHERE IN PLACE. REFRESHING SLIGHTLY BELOW NORMAL TEMPS EXPECTED...ESPECIALLY ON THE MIN TEMP SIDE WITH SOME UPPER 40S POSSIBLE OVER PORTIONS OF THE FA FRI/SAT MORNINGS IF IDEAL RADIATIONAL COOLING CONDITIONS SET UP. && .LONG TERM /SUNDAY THROUGH WEDNESDAY/... ECMWF AND GFS REMAIN IN GOOD AGREEMENT. SURFACE HIGH WILL SHIFT EAST AS AN UPPER TROUGH SLOWLY APPROACHES FROM THE WEST. A SURFACE LOW MAY DEVELOP AND MOVE SLOWLY EAST ALONG THE GULF COAST/DEEP SOUTH. MOISTURE RETURN EXPECTED FOR OUR REGION...WITH INCREASING POPS. && .AVIATION /16Z WEDNESDAY THROUGH SUNDAY/... SURFACE FRONT CONTINUES TO APPROACH THE AREA FROM THE WEST THIS AFTERNOON. CAE 88D SHOWS A LINE OF SHOWERS AND THUNDERSTORMS IN THE WESTERN PART OF THE FORECAST AREA MOVING EAST AND SHOULD AFFECT TAF SITES. ALREADY AFFECTED AGS AND DNL WITH THUNDERSTORM ACTIVITY BUT JUST BRIEFLY. NOT SURE IF OTHER TAF SITES WILL ACTUALLY GET ANY THUNDERSTORM ACTIVITY. SO DECIDED TO LEAVE OUT FOR THE TIME BEING. OTHERWISE...MORE CONVECTIVE ACTIVITY IS EXPECTED TO DEVELOP DURING THE AFTERNOON. SPC HAS REGION IN SLIGHT RISK BUT DUE TO PREVAILING CLOUD COVER...LOWER ATMOSPHERE MAY ONLY BE MARGINALLY UNSTABLE. STILL BEST WARM AIR ADVECTION AND THEREFORE BEST CHANCES OF STRONG THUNDERSTORM ACTIVITY APPEAR TO BE FROM OGB TO CHS AREA. VIL OF DAY PRETTY HIGH AT 58. LAPS CAPES RUNNING 1000-1400 J/KG AND LAPS LIS AROUND -4. THERE IS SOME INSTABILITY BUT AS SHOWERS MOVE IN AND CAUSE SOME RAIN...THE LOWER ATMOSPHERE MAY BECOME MORE STABLE. SO WILL JUST HAVE TO WATCH DEVELOPMENT. AS FAR AS TAFS GO...MAINLY VFR BUT BRIEF IFR-MVFR CONDITIONS ARE POSSIBLE IN HEAVIER SHOWERS AND THUNDERSTORMS. STILL LIKE THE TIMING OFF MORE NUMEROUS THUNDERSTORMS FOR THE LATE AFTERNOON HOURS. ONCE THE FRONT PUSHES THROUGH LATE TONIGHT...RAIN WILL END AND SKIES WILL BEGIN TO CLEAR OUT. AT THIS TIME DO NOT EXPECT MUCH IN THE WAY OF FOG FOR THURSDAY MORNING DUE TO THE WINDS REMAINING UP AND DRIER AIR PUSHING IN. EXTENDED AVIATION OUTLOOK...THE SLOW MOVING FRONT WILL MOVE OFF THE COAST EARLY THURSDAY. DO NOT EXPECT ANY SIGNIFICANT AVIATION ISSUES IN THE EXTENDED PERIOD AT THIS TIME. && .CAE WATCHES/WARNINGS/ADVISORIES... SC...NONE. GA...NONE. && SYNOPSIS...07 NEAR TERM...07 SHORT TERM...99 LONG TERM...99 AVIATION...07
Hazardous weather outlook, May 9, 5:06 AM EDT, 7 hours 40 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE COLUMBIA SC 506 AM EDT WED MAY 9 2012 GAZ040-063>065-077-SCZ015-016-018-020>022-025>031-035>038-041-100915- LINCOLN-MCDUFFIE-COLUMBIA-RICHMOND-BURKE-LANCASTER-CHESTERFIELD- MCCORMICK-NEWBERRY-FAIRFIELD-KERSHAW-EDGEFIELD-SALUDA-LEXINGTON- RICHLAND-LEE-AIKEN-SUMTER-BARNWELL-ORANGEBURG-CALHOUN-CLARENDON- BAMBERG- 506 AM EDT WED MAY 9 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL GEORGIA AND CENTRAL SOUTH CAROLINA. .DAY ONE...TODAY AND TONIGHT. SLIGHT RISK OF SEVERE THUNDERSTORMS TODAY. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED TODAY.
In the hours before
Special weather statement, May 9, 12:46 PM EDT, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE COLUMBIA SC
1246 PM EDT WED MAY 9 2012
SCZ027-091730-
LEXINGTON-
1246 PM EDT WED MAY 9 2012
...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF LEXINGTON COUNTY
THROUGH 130 PM EDT...
AT 1245 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM...NEAR LEESVILLE...MOVING EAST AT 25 MPH.
SOME LOCATIONS THAT MAY BE AFFECTED INCLUDE...
LEESVILLE...LEXINGTON...OAK GROVE...PINE RIDGE...RED BANK...SOUTH
CONGAREE AND SPRINGDALE...
PREPARE NOW FOR THE FOLLOWING HAZARDS...
GUSTY WINDS OF 40 TO 50 MPH...
PEA SIZE HAIL...
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 3410 8127 3402 8111 3388 8103 3388 8153
3400 8150
TIME...MOT...LOC 1645Z 251DEG 21KT 3395 8145
SJNThe office that day
Everything else NWS Columbia, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 9, 12:51 PM EDT | Special Weather Statement | CAE | Aiken | 24 min |
| May 9, 2:08 PM EDT | Special Weather Statement | CAE | Bamberg, Calhoun, Clarendon, Lee, Orangeburg, Richland and 1 more | 67 min |
| May 9, 2:50 PM EDT | Severe Thunderstorm Warning | CAE | Clarendon | 40 min |
| May 9, 3:08 PM EDT | Special Weather Statement | CAE | Sumter | 22 min |
Nearby
Special Weather Statements in South Carolina, 2012Every 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; radar from the NEXRAD Level II archive.