Alert archive / North Carolina / Special Weather Statements in 2015

Special Weather Statement, NWS Raleigh, NC

April 21, 2015Edgecombe County, North Carolina

NWS Raleigh, NC issued this special weather statement at Apr 21, 2015, 2:43 AM EDT for Edgecombe County, North Carolina. It was in force for 62 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: Apr 21, 2015, 2:43 AM EDT (06:43 UTC)
Expired: Apr 21, 2015, 3:45 AM EDT
In force: 62 min
Issued by: NWS Raleigh, NC

County Edgecombe County, NC

The radar

The Raleigh/Durham radar (KRAX), 92 km from the middle of the area, began a volume at 06:43 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, 6.7 hours before the alert went out and 133 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: 11 J/kg
Mixed-layer CIN: -238 J/kg
Mixed-layer LCL: 1672 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 232 m²/s²
0-3 km storm-relative helicity: 249 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

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 Raleigh, NC wrote its last area forecast discussion before this special weather statement went out at Apr 21, 1:40 AM EDT, 1 hour 3 minutes earlier.

Area forecast discussion, Apr 21, 1:40 AM EDT, 1 hour 3 minutes before

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Hazardous weather outlook, Apr 21, 2:33 AM EDT, 10 minutes before

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In the hours before

Special weather statement, Apr 20, 8:56 PM EDT, 5 hours 47 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
856 PM EDT MON APR 20 2015

NCZ011-210145-
HALIFAX NC-
856 PM EDT MON APR 20 2015

...A STRONG THUNDERSTORM WILL AFFECT PORTIONS OF NORTHERN HALIFAX
COUNTY UNTIL 945 PM EDT...

AT 856 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 13 MILES SOUTH OF LITTLETON...OR 14 MILES WEST OF
HALIFAX...MOVING NORTHEAST AT 35 MPH.

WIND GUSTS UP TO 50 MPH WILL BE POSSIBLE WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
ROANOKE RAPIDS...HALIFAX...WELDON...SOUTH WELDON...MEDOC MOUNTAIN
STATE PARK...AIRLIE AND TILLERY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEEK SHELTER IN A NEARBY BUILDING OR VEHICLE. WIND GUSTS AS HIGH AS
50 MPH ARE CAPABLE OF KNOCKING DOWN SMALL OR WEAKENED TREES AND
BLOWING AROUND TRASH CANS...POTTED PLANTS...LAWN FURNITURE AND OTHER
LIGHT OUTDOOR OBJECTS.

&&

LAT...LON 3644 7762 3641 7755 3637 7755 3634 7759
      3632 7757 3630 7754 3632 7744 3629 7741
      3626 7741 3625 7738 3618 7792 3619 7792
      3619 7796 3636 7792 3647 7764
TIME...MOT...LOC 0056Z 245DEG 31KT 3624 7783

77

Special weather statement, Apr 20, 11:08 PM EDT, 3 hours 35 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
1108 PM EDT MON APR 20 2015

NCZ007>010-023>025-040-210415-
VANCE NC-WARREN NC-GRANVILLE NC-PERSON NC-ORANGE NC-CHATHAM NC-
DURHAM NC-ALAMANCE NC-
1108 PM EDT MON APR 20 2015

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT PORTIONS OF VANCE...
WESTERN WARREN...GRANVILLE...SOUTHEASTERN PERSON...ORANGE...NORTHERN
CHATHAM...DURHAM AND SOUTHEASTERN ALAMANCE COUNTIES UNTIL 1215 AM
EDT...

AT 1107 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 9 MILES
SOUTHEAST OF VIRGILINA TO NEAR HILLSBOROUGH TO NEAR SILER CITY...AND
MOVING EAST AT 30 MPH.

HALF INCH HAIL AND WIND GUSTS UP TO 50 MPH WILL BE POSSIBLE WITH
THESE STORMS.

LOCATIONS IMPACTED INCLUDE...
DURHAM...CHAPEL HILL...HENDERSON...OXFORD...HILLSBOROUGH...
CREEDMOOR...PITTSBORO...WARRENTON...SILER CITY AND CARRBORO.

THESE STORMS MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND
TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.

LAT...LON 3626 7823 3623 7838 3616 7842 3618 7849
      3602 7855 3607 7875 3603 7875 3601 7870
      3597 7871 3592 7876 3592 7881 3587 7883
      3587 7891 3573 7895 3571 7955 3578 7954
      3609 7913 3651 7866 3654 7844 3654 7792
TIME...MOT...LOC 0307Z 263DEG 26KT 3647 7866 3609 7907 3577 7951

26

Special weather statement, Apr 21, 12:26 AM EDT, 2 hours 17 minutes before

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Special weather statement, Apr 21, 12:28 AM EDT, 2 hours 15 minutes before

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Special weather statement, Apr 21, 1:44 AM EDT, 59 minutes before

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Special weather statement, Apr 21, 2:43 AM EDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 20, 8:08 PM EDT	Special Weather Statement	RAH	Franklin, Halifax	52 min
Apr 20, 8:56 PM EDT	Special Weather Statement	RAH	Halifax	49 min
Apr 20, 11:08 PM EDT	Special Weather Statement	RAH	Durham, Granville, Orange, Vance, Warren	67 min
Apr 20, 11:23 PM EDT	Severe Thunderstorm Warning	RAH	Durham, Granville, Orange, Vance, Wake	52 min
Apr 21, 12:26 AM EDT	Special Weather Statement	RAH	Franklin	64 min
Apr 21, 12:28 AM EDT	Special Weather Statement	RAH	Warren	62 min
Apr 21, 1:44 AM EDT	Special Weather Statement	RAH	Halifax	61 min
Apr 21, 1:53 AM EDT	Areal Flood Advisory	RAH	Franklin, Halifax, Nash, Wake	3 hr

Nearby

Special Weather Statements in North Carolina, 2015 Every special weather statement in 2015

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.