Alert archive / South Carolina / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 164, NWS Wilmington, NC

August 27, 2000Florence County, South Carolina

NWS Wilmington, NC issued this severe thunderstorm warning at Aug 27, 2000, 2:06 PM EDT for Florence County, South Carolina. It was in force for 39 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Aug 27, 2000, 2:06 PM EDT (18:06 UTC)
Expired: Aug 27, 2000, 2:45 PM EDT
In force: 39 min
Issued by: NWS Wilmington, NC
Area: Whole counties

County Florence County, SC

The radar

The Wilmington radar (KLTX), 117 km from the middle of the area, began a volume at 18:07 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.

What was reported inside it

Time	Report	Where	Remark
Aug 27, 2:10 PM EDT	Thunderstorm Wind 65 E	Florence, SC	Florence 911 reported numerous trees down.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Aug 27, 2:00 PM EDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 6.1 hours before the alert went out and 128 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: 3497 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 647 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 23 m²/s²
0-3 km storm-relative helicity: 29 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.9

Open this sounding in Storm Lab

The text

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

000 
WUUS52 KILM 271806
SVRILM
SCC041-271845-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE WILMINGTON NC
206 PM EDT SUN AUG 27 2000

THE NATIONAL WEATHER SERVICE IN WILMINGTON NC HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  FLORENCE COUNTY IN NORTHEAST SOUTH CAROLINA

* UNTIL 245 PM EDT

* AT 157 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM WITH LARGE HAIL AND DAMAGING WINDS OVER
  FLORENCE...MOVING NORTHEAST AT 15 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
   CLAUSSEN AT 215 PM EDT

IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A STRONG
BUILDING. DAMAGING WIND...LARGE HAIL...HEAVY RAIN AND DEADLY
LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS. STAY INSIDE AWAY
FROM WINDOWS UNTIL THE STORM HAS PASSED.

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST
OFFICE IN WILMINGTON NC.

$$

CRM

.END

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Wilmington, NC wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 27, 2:03 PM EDT, 3 minutes earlier.

Area forecast discussion, Aug 27, 2:03 PM EDT, 3 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE WILMINGTON NC
203 PM EDT SUN AUG 27 2000

LOW CENTER IS SPINNING OVER OHIO THIS AFTN AND WATER VAPOR TRENDS
SHOW IT DROPPING SE. MODELS AGREE IN BRINGING IT OFF THE CAROLINA
COAST MON NIGHT INTO TUE. ASSOCIATED SFC TROF WILL APPROACH THE
EASTERN CAROLINAS MON THEN STALL OVER THE CWA OR JUST OFFSHORE.
MODELS ARE MAXIMIZING LIFT OVER THE CWA TONIGHT AND PLAN ON CARRYING
LIKELY POPS. SEVERE TSTM WATCH JUST ISSUED SO WILL MENTION
POSSIBILITY OF SEVERE TSTMS FOR THE EVENING AS NEEDED.

NGM DRIES THE MID-LEVELS OUT RAPIDLY AFTER 06Z MON AND THIS APPEARS
REASONABLE LOOKING AT WATER VAPOR. DUE TO DISAGREEMENT IN MODELS
WITH THE EVOLUTION OF THIS SYSTEM...CONFIDENCE IS NOT THAT HIGH AS
FAR AS POPS MON INTO TUE. ATTM AM PLANNING TO MAINTAIN LOW CHANCE
POPS THROUGH TUE.

CWF...SW WINDS 10 KTS OR LESS AND SEAS 2-3 FT PER LATEST OBS.
NEITHER ETA OR NGM IS DOING A GREAT JOB WITH SFC FEATURES AT 18Z.
ETA APPEARS SLIGHTLY MORE IN LINE WITH REALITY AS NGM PG TOO STRONG
OVER THE WATERS. WILL LEAN TOWARDS ETA SOLUTION AND KEEP WINDS BELOW
SCA. EXPECT LIGHT/VRBL WINDS MON AFTN-NIGHT INVOF TROF...NE ON TUE.

PRELIM CCF:
ILM BB 072/089 070/087 072 33733
FLO BB 071/091 070/090 071 33733
MYR BB 073/087 071/086 072 33733

.ILM...NONE.

CRM

The office that day

Everything else NWS Wilmington, NC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 27, 4:15 PM EDT	Severe Thunderstorm Warning	ILM	Marion	30 min
Aug 27, 5:07 PM EDT	Severe Thunderstorm Warning	ILM	Florence, Marion	53 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2000 Every severe thunderstorm warning in 2000

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.