Alert archive / North Carolina / Special Weather Statements in 2012

Special Weather Statement, NWS Wilmington, NC

August 20, 2012New Hanover County, North Carolina

NWS Wilmington, NC issued this special weather statement at Aug 20, 2012, 2:30 AM EDT for New Hanover County, North Carolina. It was in force for 45 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 20, 2012, 2:30 AM EDT (06:30 UTC)
Expired: Aug 20, 2012, 3:15 AM EDT
In force: 45 min
Issued by: NWS Wilmington, NC

County New Hanover County, NC

The radar

The Wilmington radar (KLTX), 58 km from the middle of the area, began a volume at 06:31 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 00:00Z, 6.5 hours before the alert went out and 110 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: 207 J/kg
Mixed-layer CIN: -84 J/kg
Mixed-layer LCL: 851 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 146 m²/s²
0-3 km storm-relative helicity: 166 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.8

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 20, 1:49 AM EDT, 41 minutes earlier.

Area forecast discussion, Aug 20, 1:49 AM EDT, 41 minutes before

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Hazardous weather outlook, Aug 19, 5:00 PM EDT, 9 hours 30 minutes before

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In the hours before

Special weather statement, Aug 20, 2:30 AM EDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILMINGTON NC
230 AM EDT MON AUG 20 2012

NCZ107>110-200715-
COASTAL BRUNSWICK-COASTAL NEW HANOVER-INLAND BRUNSWICK-INLAND NEW
HANOVER-
230 AM EDT MON AUG 20 2012

...SHOWERS AND THUNDERSTORMS PRODUCING HEAVY RAIN WILL MOVE ACROSS
BRUNSWICK AND NEW HANOVER COUNTIES THROUGH 315 AM EDT...

AT 230 AM EDT...DOPPLER RADAR INDICATED SHOWERS AND THUNDERSTORMS
WITH VERY HEAVY RAIN OVER BOILING SPRING LAKES...OR ABOUT 7 MILES
WEST OF CAROLINA BEACH...MOVING NORTHEAST AT 25 MPH.

SOME LOCATIONS IMPACTED INCLUDE BOILING SPRING LAKES...MASONBORO...
MILL CREEK...MYRTLE GROVE...SEAGATE...SILVER LAKE...WRIGHTSVILLE
BEACH AND BOLIVIA.

HAZARDS INCLUDE...
GUSTY WINDS OF 30 TO 40 MPH.

HEAVY RAINFALL AND MINOR FLOODING.

THIS STORM WILL PRODUCE HEAVY RAINFALL...WHICH WILL CAUSE MINOR
FLOODING OF LOW LYING AREAS INCLUDING DITCHES...CREEKS...ROADWAYS AND
AREAS OF POOR DRAINAGE. AVOID THESE AREAS AND DO NOT CROSS FLOODED
ROADS. MOTORISTS SHOULD ALSO REDUCE DRIVING SPEEDS TO AVOID
HYDROPLANING.

&&

LAT...LON 3429 7771 3425 7776 3416 7783 3410 7785
      3406 7787 3397 7813 3407 7820 3429 7774
      3429 7773 3429 7772
TIME...MOT...LOC 0630Z 240DEG 25KT 3408 7799

WEISS

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 20, 4:54 AM EDT	Special Weather Statement	ILM	Dillon	81 min
Aug 20, 5:59 AM EDT	Special Weather Statement	ILM	Bladen	91 min
Aug 20, 8:11 AM EDT	Special Weather Statement	ILM	Pender	34 min

Nearby

Special Weather Statements in North Carolina, 2012 Every 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.