Alert archive / North Carolina / Special Weather Statements in 2011

Special Weather Statement, NWS Wilmington, NC

August 21, 2011Robeson County, North Carolina

NWS Wilmington, NC issued this special weather statement at Aug 21, 2011, 2:46 PM EDT for Robeson County, North Carolina. It was in force for 29 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 21, 2011, 2:46 PM EDT (18:46 UTC)
Expired: Aug 21, 2011, 3:15 PM EDT
In force: 29 min
Issued by: NWS Wilmington, NC

County Robeson County, NC

The radar

The Wilmington radar (KLTX), 76 km from the middle of the area, began a volume at 18:48 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

Newport, NC (KMHX), launched 12:00Z, 6.8 hours before the alert went out and 194 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: 1537 J/kg
Mixed-layer CIN: -20 J/kg
Mixed-layer LCL: 811 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 25 m²/s²
0-3 km storm-relative helicity: 29 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Wilmington, NC wrote its last area forecast discussion before this special weather statement went out at Aug 21, 1:38 PM EDT, 1 hour 8 minutes earlier.

Area forecast discussion, Aug 21, 1:38 PM EDT, 1 hour 8 minutes before

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Hazardous weather outlook, Aug 21, 6:47 AM EDT, 7 hours 59 minutes before

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In the hours before

Special weather statement, Aug 21, 2:29 PM EDT, 17 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILMINGTON NC
229 PM EDT SUN AUG 21 2011

NCZ099-109-211930-
COLUMBUS-INLAND BRUNSWICK-
229 PM EDT SUN AUG 21 2011

...A STRONG THUNDERSTORM WILL MOVE ACROSS BRUNSWICK AND COLUMBUS
COUNTIES THROUGH 330 PM EDT...

AT 229 PM EDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM ABOUT
15 MILES WEST OF LELAND...MOVING NORTHEAST AT 10 MPH.

SOME LOCATIONS IMPACTED INCLUDE BATARORA...DELCO...RIEGELWOOD...
SANDY CREEK...AND ROUTE 76.

HAZARDS INCLUDE...
SMALL HAIL.
GUSTY WINDS OF 30 TO 40 MPH.
CLOUD TO GROUND LIGHTNING.

IF YOU SEE LIGHTNING OR HEAR THUNDER...YOU ARE AT RISK. TAKE SHELTER
INDOORS IMMEDIATELY. IF YOU CANNOT FIND SHELTER IN A BUILDING A
VEHICLE PROVIDES SAFETY FROM LIGHTNING.

&&

LAT...LON 3420 7805 3418 7826 3427 7834 3436 7821
      3435 7820 3436 7817
TIME...MOT...LOC 1829Z 236DEG 8KT 3423 7827

III

Special weather statement, Aug 21, 2:46 PM EDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILMINGTON NC
246 PM EDT SUN AUG 21 2011

NCZ087-099-211915-
COLUMBUS-ROBESON-
246 PM EDT SUN AUG 21 2011

...A STRONG THUNDERSTORM WILL MOVE ACROSS COLUMBUS AND ROBESON
COUNTIES THROUGH 315 PM EDT...

AT 245 PM EDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM ABOUT
10 MILES SOUTH OF LUMBERTON...MOVING EAST AT 15 MPH.

SOME LOCATIONS IMPACTED INCLUDE BOARDMAN...ORRUM...PROCTORVILLE AND
ROUTE 74.

HAZARDS INCLUDE...
PEA SIZE HAIL.
GUSTY WINDS OF 30 TO 40 MPH.
FREQUENT CLOUD TO GROUND LIGHTNING.

IF YOU SEE LIGHTNING OR HEAR THUNDER...YOU ARE AT RISK. TAKE SHELTER
INDOORS IMMEDIATELY. IF YOU CANNOT FIND SHELTER IN A BUILDING A
VEHICLE PROVIDES SAFETY FROM LIGHTNING.

&&

LAT...LON 3459 7892 3440 7884 3443 7909 3453 7909
TIME...MOT...LOC 1845Z 261DEG 11KT 3449 7900

III

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 21, 4:30 PM EDT	Special Weather Statement	ILM	Horry	30 min
Aug 21, 5:16 PM EDT	Special Weather Statement	ILM	Marlboro	29 min
Aug 21, 5:54 PM EDT	Severe Thunderstorm Warning	ILM	Dillon, Horry, Marion	51 min
Aug 21, 2:29 PM EDT	Special Weather Statement	ILM	Brunswick	61 min
Aug 21, 4:14 PM EDT	Severe Thunderstorm Warning	ILM	Robeson	61 min
Aug 21, 5:02 PM EDT	Severe Thunderstorm Warning	ILM	Bladen, Columbus, Robeson	58 min
Aug 21, 5:16 PM EDT	Tornado Warning	ILM	Bladen, Columbus, Robeson	29 min
Aug 21, 6:29 PM EDT	Severe Thunderstorm Warning	ILM	Columbus	46 min
Aug 21, 7:11 PM EDT	Special Weather Statement	ILM	Brunswick	49 min
Aug 21, 7:59 PM EDT	Special Weather Statement	ILM	New Hanover	31 min

Nearby

Special Weather Statements in North Carolina, 2011 Every 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.