Alert archive / South Carolina / Special Weather Statements in 2011
Special Weather Statement, NWS Columbia, SC
NWS Columbia, SC issued this special weather statement at Aug 19, 2011, 3:29 PM EDT for Aiken County, South Carolina. It was in force for 61 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
- Aug 19, 2011, 3:29 PM EDT (19:29 UTC)
- Expired
- Aug 19, 2011, 4:30 PM EDT
- In force
- 61 min
- Issued by
- NWS Columbia, SC
County Aiken County, SC
The radar
The Columbia radar (KCAE), 51 km from the middle of the area, began a volume at 19:32 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, 7.5 hours before the alert went out and 162 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
- 437 J/kg
- Mixed-layer CIN
- -55 J/kg
- Mixed-layer LCL
- 1001 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 22 m²/s²
- 0-3 km storm-relative helicity
- 24 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</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 Aug 19, 2:03 PM EDT, 1 hour 26 minutes earlier.
Area forecast discussion, Aug 19, 2:03 PM EDT, 1 hour 26 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE COLUMBIA SC 203 PM EDT FRI AUG 19 2011 .SYNOPSIS... A SLIGHT INCREASE IN ATMOSPHERIC MOISTURE WILL PROVIDE A SLIGHT CHANCE OF MAINLY AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS THROUGH MONDAY. && .NEAR TERM /THROUGH TONIGHT/... A WEAK SURFACE TROUGH STRETCHES ACROSS THE WESTERN CAROLINAS. IT APPEARS A WEAK UPPER LEVEL DISTURBANCE WILL MOVE ACROSS THE REGION THIS EVENING. LATEST RADAR INDICATES SOME SHOWER AND POSSIBLE ISOLATED THUNDERSTORM ACTIVITY DEVELOPING BEGINNIGN TO DEVELOP OVER PORTS OF OUR FA. LATEST MODEL INFORMATION SUGGESTS ADDITIONAL SCATTERED CONVECTION FORMING LATE THIS AFTERNOON ACROSS THE WESTERN CAROLINAS THAT DRIFTS TOWARDS OUR FA LATE TODAY AND THIS EVENING. LATEST NAM TRENDING MUCH HIGHER ON POPS TONIGHT...BUT IT MAY BE AN OUTLIER. IT APPEARS THAT BEST MOISTURE AND DYNAMICS MAY STAY JUST TO OUR NORTH...AND SOME OF THE CONVECTION MAY TEND TO DISSIPATE AFTER LOSS OF HEATING. SO...THINK CHANCE POPS IN ORDER ACROSS THE NORTH AND SLIGHT CHANCE ELSEWHERE THIS EVENING...AND WILL MAINTAIN AT LEAST A SLIGHT CHANCE EVERYWHERE THROUGHOUT THE NIGHT. && .SHORT TERM /SATURDAY THROUGH SUNDAY/... RELATIVELY LITTLE CHANGE SATURDAY. MODELS INDICATE A LITTLE DRYING ALOFT...BUT OVERALL ATMOSPHERE APPEARS SIMILAR WITH ONLY WEAK INSTABILITY. SO WILL MAINTAIN SLIGHT CHANCE POPS. LOWS TONIGHT FALLING DOWN TO NEAR 70...THEN LOWS SATURDAY NIGHT SLIGHTLY WARMER WITH READINGS IN THE LOWER 70S. HIGHS DURING THE DAY ON SATURDAY ABOVE NORMAL...RISING INTO THE MIDDLE 90S. && .LONG TERM /SUNDAY NIGHT THROUGH FRIDAY/... LITTLE OVERALL CHANGE IN THE MEAN UPPER PATTERN EXPECTED DURING THE PERIOD WITH RIDGE OVER THE SW US/SOUTHERN PLAINS AND TROUGH EAST COAST. WEAK COLD FRONT LIKELY APPROACHING THE AREA MONDAY. FRONT WEAKENS AS IT MOVES INTO THE AREA DURING THE AFTERNOON AND MOISTURE APPEARS LIMITED...AXIS SHIFTS EAST OF THE AREA EARLY...AND STRONGER DYNAMICS NORTH OF THE REGION. ENSEMBLE POPS LOW THROUGH MONDAY AND TRIGGERS HARD TO IDENTIFY/TIME SO SLIGHT CHANCE THUNDERSTORMS MAINLY AFTERNOON AND EVENING THROUGH MONDAY NIGHT. SOME UNCERTAINTIES WITH REGARD TO FRONTAL POSITION TUESDAY AND WEDNESDAY AND EXTENT AND TIMING OF ANY DRIER AIR THAT MAY MOVE INTO THE FA. ENSEMBLE GUIDANCE SUGGESTS A SLIGHT INCREASE IN POPS EACH DAY THROUGH EXTENDED AS MOISTURE INCREASES. TEMPERATURES AT OR ABOVE CLIMATOLOGY. && .AVIATION /18Z FRIDAY THROUGH WEDNESDAY/... UPDATE...LATEST RADAR INDICATES SOME SHOWER AND POSSIBLE ISOLATED THUNDERSTORM ACTIVITY DEVELOPING. WILL INCLUDE VCSH AND CB CLOUD GROUP IN THE NEAR TERM FOR ALL TAF SITES. VFR CONDITIONS CURRENTLY. A WEAK SURFACE TROUGH STRETCHES ACROSS THE WESTERN CAROLINAS. IT APPEARS A WEAK UPPER LEVEL DISTURBANCE WILL MOVE ACROSS THE REGION THIS EVENING. LATEST MODEL INFORMATION SUGGESTS SCATTERED CONVECTION FORMING LATE THIS AFTERNOON ACROSS THE WESTERN CAROLINAS THAT DRIFTS TOWARDS OUR FA LATE TODAY AND THIS EVENING. CURRENT INDICATIONS ARE THAT CONFIDENCE OF TSRA AFFECTING TAF SITES TOO LOW TO INCLUDE A MENTION IN THE TAFS AT THIS TIME. THOUGH SOME FOG POSSIBLE LATE TONIGHT/EARLY SATURDAY MORNING...WILL NOT MENTION FOG AT THIS TIME DUE TO UNCERTAINTIES REGARDING CLOUD COVER. EXTENDED AVIATION OUTLOOK...MVFR OR IFR CONDITIONS MAY OCCUR IN EARLY MORNING FOG/STRATUS AS WELL AS IN AFTERNOON AND EVENING CONVECTION EACH DAY. && .CAE WATCHES/WARNINGS/ADVISORIES... SC...NONE. GA...NONE. &&
Hazardous weather outlook, Aug 19, 4:26 AM EDT, 11 hours 3 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE COLUMBIA SC 426 AM EDT FRI AUG 19 2011 GAZ040-063>065-077-SCZ015-016-018-020>022-025>031-035>038-041-200830- LINCOLN-MCDUFFIE-COLUMBIA-RICHMOND-BURKE-LANCASTER-CHESTERFIELD- MCCORMICK-NEWBERRY-FAIRFIELD-KERSHAW-EDGEFIELD-SALUDA-LEXINGTON- RICHLAND-LEE-AIKEN-SUMTER-BARNWELL-ORANGEBURG-CALHOUN-CLARENDON- BAMBERG- 426 AM EDT FRI AUG 19 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL GEORGIA AND CENTRAL SOUTH CAROLINA. .DAY ONE...TODAY AND TONIGHT. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY. 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 19, 2:57 PM EDT, 32 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE COLUMBIA SC
257 PM EDT FRI AUG 19 2011
SCZ027-036-037-192000-
CALHOUN-LEXINGTON-ORANGEBURG-
257 PM EDT FRI AUG 19 2011
...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF LEXINGTON...CALHOUN
AND ORANGEBURG COUNTIES THROUGH 400 PM EDT...
AT 255 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS IN PARTS OF SOUTHERN LEXINGTON COUNTY AND
NORTHWEST CALHOUN CALHOUN...MOVING TOWARD PARTS OF NORTHERN
ORANGEBURG COUNTY.
MOVEMENT WAS SOUTHEAST NEAR 15 MPH.
EXPECT HEAVY DOWNPOURS...FREQUENT LIGHTNING...AND WIND GUSTS NEAR
40 MPH WITH THESE STORMS.
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 3370 8128 3391 8122 3382 8092 3381 8091
3380 8085 3378 8082 3378 8081 3376 8078
3377 8077 3376 8075 3377 8074 3359 8086
TIME...MOT...LOC 1855Z 302DEG 7KT 3373 8102Special weather statement, Aug 19, 3:29 PM EDT, 0 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE COLUMBIA SC 329 PM EDT FRI AUG 19 2011 SCZ030-192030- AIKEN- 329 PM EDT FRI AUG 19 2011 ...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF AIKEN COUNTY THROUGH 430 PM EDT... AT 325 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM IN NORTHERN AIKEN COUNTY. IT WAS IN THE MILE MARKER 29 AREA OF INTERSTATE 20. MOVEMENT WAS SOUTHEAST NEAR 20 MPH. EXPECT FREQUENT LIGHTNING...WIND GUSTS NEAR 40 MPH...AND HEAVY DOWNPOURS WITH THIS STORM. 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 3356 8133 3345 8160 3374 8173 3382 8154 TIME...MOT...LOC 1927Z 333DEG 8KT 3370 8158
The office that day
Everything else NWS Columbia, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 19, 2:57 PM EDT | Special Weather Statement | CAE | Calhoun | 63 min |
| Aug 19, 3:43 PM EDT | Special Weather Statement | CAE | Calhoun, Orangeburg | 62 min |
| Aug 19, 4:48 PM EDT | Severe Thunderstorm Warning | CAE | Orangeburg | 57 min |
Nearby
Special Weather Statements in South Carolina, 2011Every special weather statement 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.