Alert archive / North Carolina / Special Weather Statements in 2012

Special Weather Statement, NWS Raleigh, NC

March 20, 2012Granville County, Vance County, North Carolina

NWS Raleigh, NC issued this special weather statement at Mar 20, 2012, 2:33 AM EDT for Granville County, Vance County, North Carolina. It was in force for 57 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: Mar 20, 2012, 2:33 AM EDT (06:33 UTC)
Expired: Mar 20, 2012, 3:30 AM EDT
In force: 57 min
Issued by: NWS Raleigh, NC

Counties Granville County, NC, Vance County, NC

The radar

The Raleigh/Durham radar (KRAX), 84 km from the middle of the area, began a volume at 06:35 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

Roanoke, VA (KRNK), launched 00:00Z, 6.6 hours before the alert went out and 123 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: 107 J/kg
Mixed-layer CIN: -43 J/kg
Mixed-layer LCL: 1866 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 32 m²/s²
0-3 km storm-relative helicity: 83 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 Raleigh, NC wrote its last area forecast discussion before this special weather statement went out at Mar 20, 1:40 AM EDT, 53 minutes earlier.

Area forecast discussion, Mar 20, 1:40 AM EDT, 53 minutes before

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Hazardous weather outlook, Mar 19, 4:24 PM EDT, 10 hours 9 minutes before

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In the hours before

Special weather statement, Mar 20, 2:33 AM EDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
233 AM EDT TUE MAR 20 2012

NCZ008-009-200730-
GRANVILLE-VANCE-
233 AM EDT TUE MAR 20 2012

...A STRONG THUNDERSTORM WILL MOVE ACROSS PARTS OF VANCE AND
GRANVILLE COUNTIES AT LEAST THROUGH 330 AM EDT...

AT 232 AM EDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 6 MILES
NORTH OF KERR LAKE...OR ABOUT 11 MILES NORTHEAST OF VIRGILINA...
MOVING SOUTH AT 20 MPH.

SOME LOCATIONS AFFECTED BY THIS STORM INCLUDE...KERR LAKE...
TUNGSTEN...STOVALL...DABNEY.

HAZARDS INCLUDE...
HALF INCH DIAMETER SIZE HAIL.
GUSTY WINDS OF 30 TO 40 MPH.

THIS INCLUDES INTERSTATE 85 BETWEEN EXITS 202 AND 218.

BOATERS ON THE OPEN WATER AND THOSE CAMPING OUTDOORS ARE ESPECIALLY
VULNERABLE TO THE DANGERS OF LIGHTNING. BOATERS SHOULD MOVE TO SAFE
HARBOR OR REMAIN THERE UNTIL THE THUNDERSTORM HAS PASSED. THOSE
CAMPING SHOULD CONSIDER MOVING TO SHELTER IN A NEARBY BUILDING OR
VEHICLE TO HELP AVOID THE DANGERS OF LIGHTNING. STAY TUNED TO THIS
STATION FOR THE LATEST WEATHER INFORMATION.

&&

LAT...LON 3631 7833 3624 7865 3655 7872 3655 7871
      3655 7844
TIME...MOT...LOC 0632Z 345DEG 17KT 3661 7860

DJF

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 20, 3:04 AM EDT	Special Weather Statement	RAH	Vance	56 min
Mar 20, 4:57 AM EDT	Special Weather Statement	RAH	Durham	63 min
Mar 20, 5:44 AM EDT	Special Weather Statement	RAH	Wake	61 min
Mar 20, 5:59 AM EDT	Special Weather Statement	RAH	Wake	61 min
Mar 20, 6:43 AM EDT	Special Weather Statement	RAH	Harnett, Lee	62 min
Mar 20, 7:08 AM EDT	Special Weather Statement	RAH	Cumberland, Harnett, Hoke, Lee, Moore	52 min
Mar 20, 9:26 AM EDT	Special Weather Statement	RAH	Granville	64 min
Mar 20, 9:50 AM EDT	Special Weather Statement	RAH	Richmond	55 min
Mar 20, 10:36 AM EDT	Special Weather Statement	RAH	Richmond	54 min
Mar 20, 10:41 AM EDT	Special Weather Statement	RAH	Wake	64 min
Mar 20, 4:04 PM EDT	Special Weather Statement	RAH	Franklin	41 min
Mar 20, 4:51 PM EDT	Severe Thunderstorm Warning	RAH	Franklin, Nash	39 min
Mar 20, 5:03 PM EDT	Special Weather Statement	RAH	Randolph	57 min
Mar 20, 5:32 PM EDT	Special Weather Statement	RAH	Franklin	58 min
Mar 20, 5:58 PM EDT	Severe Thunderstorm Warning	RAH	Franklin, Wake	28 min
Mar 20, 6:36 PM EDT	Special Weather Statement	RAH	Davidson, Forsyth	54 min
Mar 20, 7:04 PM EDT	Special Weather Statement	RAH	Davidson, Forsyth	26 min
Mar 20, 7:13 PM EDT	Areal Flood Advisory	RAH	Davidson, Forsyth, Guilford	3 hr
Mar 20, 7:16 PM EDT	Severe Thunderstorm Warning	RAH	Davidson, Forsyth, Guilford	44 min
Mar 20, 7:39 PM EDT	Flash Flood Warning	RAH	Davidson, Forsyth, Guilford	3 hr

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.