Alert archive / South Carolina / Special Weather Statements in 2016

Special Weather Statement, NWS Columbia, SC

July 16, 2016Lexington County, South Carolina

NWS Columbia, SC issued this special weather statement at Jul 16, 2016, 10:33 PM EDT for Lexington County, South Carolina. It was in force for 42 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
Jul 16, 2016, 10:33 PM EDT (02:33 UTC)
Expired
Jul 16, 2016, 11:15 PM EDT
In force
42 min
Issued by
NWS Columbia, SC

County Lexington County, SC

The radar

The Columbia radar (KCAE), 18 km from the middle of the area, began a volume at 02:32 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 00:00Z, 2.6 hours before the alert went out and 139 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-pSkew-T log-p diagram, Charleston AFB, SC at 00:00Z on 2016-07-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2000 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Charleston AFB, SC at 00:00Z on 2016-07-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 39 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
2000 J/kg
Mixed-layer CIN
-22 J/kg
Mixed-layer LCL
1025 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
39 m²/s²
0-3 km storm-relative helicity
49 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.5

Open this sounding in Storm Lab

The text

As transmitted.

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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 Jul 16, 6:03 PM EDT, 4 hours 30 minutes earlier.

Area forecast discussion, Jul 16, 6:03 PM EDT, 4 hours 30 minutes before
Area Forecast Discussion
National Weather Service Columbia SC
603 PM EDT SAT JUL 16 2016

.SYNOPSIS...
A pressure ridge will extend westward from the Atlantic into the
northern Gulf of Mexico. North of the ridge a pressure trough
will be in the forecast area. An upper trough over the area will
weaken on Sunday. Scattered mainly afternoon and evening
thunderstorms are expected for the next few days. Temperatures
will be at or above normal through the period.

&&

.NEAR TERM /UNTIL 6 AM SUNDAY MORNING/...
Scattered thunderstorms in progress, and will expect convective
activity to continue to affect portions of the forecast area (FA)
through this evening to early tonight. Isolated severe cells
possible, with threat of locally heavy rain with some of the
training echoes as precipitable water values are over 2 inches.
Otherwise, will expect a decrease in convective coverage later
tonight. Used the guidance consensus for the minimum temperature.

&&

.SHORT TERM /6 AM SUNDAY MORNING THROUGH MONDAY NIGHT/...
The NAM and GFS show surface ridging from the Atlantic more
dominate Sunday although weak surface trough should be near the
area. Upper level forcing should be weaker with short wave troughs
mainly north of the area as upper level trough lifts north. Moisture
remains high across the east midlands and CSRA with precipitable
water around 2 inches. Some drying possible in the west. The
pattern indicates less thunderstorm coverage but with temperatures
in the low to mid 90s...moderate instability expected. The
guidance supports highest pops in the southeast. Will continue
chance pops mainly afternoon.

The surface trough remains across the area Monday and the air
mass moderately unstable. Strongest lift remains north of the
region although models suggest weakness in upper level ridge and a
short wave may track southeast through the area in the afternoon.
Chance afternoon and evening thunderstorms with temperatures in
the mid 90s. Warm overnight temperatures.

&&

.LONG TERM /TUESDAY THROUGH SATURDAY/...
The GFS and ECMWF displayed surface ridging extending from the
Atlantic into the Gulf of Mexico during much of the medium-range
period. The models showed some troughing in the forecast area. The
models indicated upper ridging early but troughing along the east
coast by the middle of the week as ridge shifts west. Some hint of
a backdoor cold frontal passage mid week suggesting increased
chance thunderstorms during that period although GFS ensemble
suggests near climatology or lower pops. Temperatures should be
near or above normal during the period. Scattered afternoon and
evening through much of the period with highest chance mid week.

&&

.AVIATION /22Z SATURDAY THROUGH THURSDAY/...
Main near term concern through this evening is scattered
thunderstorm activity. Will monitor radar trends for appropriate
inclusion of such in the TAFs. Will expect convective coverage to
decrease later this evening/early tonight. Because of high
dewpoint temperatures and expected rainfall, have included some
fog for Sunday morning at OGB/CUB/AGS.

EXTENDED AVIATION OUTLOOK...Increasing potential for restrictions
in convection into early next week.

&&

.CAE WATCHES/WARNINGS/ADVISORIES...
GA...None.
SC...None.

&&
Hazardous weather outlook, Jul 16, 3:06 AM EDT, 19 hours 27 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE COLUMBIA SC
306 AM EDT SAT JUL 16 2016

GAZ040-063>065-077-SCZ015-016-018-020>022-025>031-035>038-041-170715-
LINCOLN-MCDUFFIE-COLUMBIA-RICHMOND-BURKE-LANCASTER-CHESTERFIELD-
MCCORMICK-NEWBERRY-FAIRFIELD-KERSHAW-EDGEFIELD-SALUDA-LEXINGTON-
RICHLAND-LEE-AIKEN-SUMTER-BARNWELL-ORANGEBURG-CALHOUN-CLARENDON-
BAMBERG-
306 AM EDT SAT JUL 16 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE MIDLANDS OF SOUTH CAROLINA
AND THE CENTRAL SAVANNAH RIVER AREA OF GEORGIA.

.DAY ONE...TODAY AND TONIGHT.

THUNDERSTORMS THIS AFTERNOON AND EVENING COULD POSSIBLY CONTAIN
DAMAGING WIND. A FEW OF THE THUNDERSTORMS COULD ALSO CONTAIN HEAVY
RAIN WITH LOCALIZED FLOODING.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

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, Jul 16, 5:13 PM EDT, 5 hours 20 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE COLUMBIA SC
513 PM EDT SAT JUL 16 2016

GAZ065-077-SCZ030-162145-
BURKE-RICHMOND-AIKEN-
513 PM EDT SAT JUL 16 2016

...A STRONG THUNDERSTORM WILL AFFECT NORTH CENTRAL BURKE...
SOUTHEASTERN RICHMOND AND SOUTHWESTERN AIKEN COUNTIES...

AT 513 PM EDT...A STRONG THUNDERSTORM WAS NEAR HEPHZIBAH...OR 7 MILES
SOUTH OF AUGUSTA...MOVING EAST AT 25 MPH.

WIND GUSTS OF 45 TO 55 MPH AND HALF INCH HAIL ARE POSSIBLE WITH THIS
STORM.

LOCATIONS IMPACTED INCLUDE...
HEPHZIBAH.

LAT...LON 3325 8217 3341 8213 3347 8195 3325 8183
TIME...MOT...LOC 2113Z 258DEG 20KT 3334 8201

AWP
Special weather statement, Jul 16, 5:14 PM EDT, 5 hours 19 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE COLUMBIA SC
514 PM EDT SAT JUL 16 2016

SCZ021-027-028-162200-
LEXINGTON-RICHLAND-FAIRFIELD-
514 PM EDT SAT JUL 16 2016

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT NORTHERN
RICHLAND...CENTRAL FAIRFIELD AND CENTRAL LEXINGTON COUNTIES...

AT 514 PM EDT...A LINE OF STRONG THUNDERSTORMS WAS ALONG A LINE
EXTENDING FROM 7 MILES WEST OF WINNSBORO TO ST. ANDREWS TO NEAR RED
BANK...AND MOVING EAST AT 30 MPH.

WIND GUSTS OF 35 TO 45 MPH ARE POSSIBLE WITH THESE STORMS.

LOCATIONS IMPACTED INCLUDE...
COLUMBIA...LEXINGTON...WEST COLUMBIA...CAYCE...IRMO...FOREST ACRES...
WINNSBORO...SPRINGDALE...ST. ANDREWS...WOODFIELDS...RED BANK...
DENTSVILLE...OAK GROVE...SOUTH CONGAREE...PINE RIDGE...
ARCADIA LAKES...WOODFIELD...FIVE POINTS...
FORT JACKSON AND BLYTHEWOOD.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

LAT...LON 3431 8080 3418 8087 3408 8073 3394 8077
      3383 8134 3405 8117 3445 8128 3453 8094
TIME...MOT...LOC 2114Z 253DEG 27KT 3439 8122 3407 8110 3386 8128

FWA
Local storm report, Jul 16, 6:07 PM EDT, 4 hours 26 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE COLUMBIA SC
607 PM EDT SAT JUL 16 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0547 PM     TSTM WND DMG     5 S WINNSBORO MILLS     34.28N 81.07W
07/16/2016                   FAIRFIELD          SC   LAW ENFORCEMENT

            FAIRFIELD COUNTY SHERIFF REPORTED TREES DOWN
            ON US HIGHWAY 321 AT PEACH ROAD.

&&

AWP
Local storm report, Jul 16, 6:26 PM EDT, 4 hours 7 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE COLUMBIA SC
626 PM EDT SAT JUL 16 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0555 PM     TSTM WND DMG     3 ENE RIDGEWAY          34.33N 80.91W
07/16/2016                   FAIRFIELD          SC   LAW ENFORCEMENT

            TREE IN ROADWAY LONGTOWN RD AND BELLFIELD
            RD.

&&

DA
Special weather statement, Jul 16, 6:46 PM EDT, 3 hours 47 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE COLUMBIA SC
646 PM EDT SAT JUL 16 2016

SCZ015-016-022-029-162315-
LEE-CHESTERFIELD-LANCASTER-KERSHAW-
646 PM EDT SAT JUL 16 2016

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT EASTERN KERSHAW...
SOUTHERN LANCASTER...WESTERN CHESTERFIELD AND NORTHWESTERN LEE
COUNTIES...

AT 646 PM EDT...A LINE OF STRONG THUNDERSTORMS WAS ALONG A LINE
EXTENDING FROM LANCASTER TO 10 MILES SOUTHEAST OF KERSHAW TO 9 MILES
NORTHWEST OF OAKLAND...AND MOVING EAST AT 35 MPH.

WIND GUSTS OF 45 TO 55 MPH ARE POSSIBLE WITH THESE STORMS.

LOCATIONS IMPACTED INCLUDE...
LANCASTER...CAMDEN...BISHOPVILLE...PAGELAND...KERSHAW...ELGIN...HEATH
SPRINGS...MCBEE...JEFFERSON...BETHUNE AND LANCASTER MILL.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

LAT...LON 3448 8006 3437 8029 3432 8024 3437 8018
      3433 8018 3416 8031 3413 8048 3416 8049
      3412 8055 3410 8066 3441 8054 3479 8088
      3482 8080 3481 8030 3452 8003
TIME...MOT...LOC 2246Z 254DEG 29KT 3475 8077 3443 8048 3409 8060

FWA
Local storm report, Jul 16, 7:50 PM EDT, 2 hours 43 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 16, 8:59 PM EDTSpecial Weather StatementCAEBamberg, Orangeburg61 min
Jul 16, 9:56 PM EDTAreal Flood AdvisoryCAECalhoun, Orangeburg2 hr
Jul 17, 4:08 PM EDTSpecial Weather StatementCAERichland22 min
Jul 17, 4:50 PM EDTAreal Flood AdvisoryCAERichland55 min
Jul 17, 5:09 PM EDTSpecial Weather StatementCAEFairfield21 min
Jul 17, 5:27 PM EDTSpecial Weather StatementCAELexington48 min
Jul 17, 7:11 PM EDTSpecial Weather StatementCAELancaster34 min
Jul 17, 7:39 PM EDTSpecial Weather StatementCAEMcCormick51 min
Jul 17, 7:47 PM EDTSevere Thunderstorm WarningCAEEdgefield, McCormick43 min
Jul 16, 8:20 PM EDTSpecial Weather StatementCAEColumbia, Richmond55 min

Nearby

Special Weather Statements in South Carolina, 2016Every special weather statement in 2016

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.