Alert archive / North Carolina / Special Weather Statements in 2015

Special Weather Statement, NWS Raleigh, NC

December 24, 2015Alamance County, North Carolina

NWS Raleigh, NC issued this special weather statement at Dec 24, 2015, 3:01 PM EST for Alamance County, North Carolina. It was in force for 44 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: Dec 24, 2015, 3:01 PM EST (20:01 UTC)
Expired: Dec 24, 2015, 3:45 PM EST
In force: 44 min
Issued by: NWS Raleigh, NC

County Alamance County, NC

The radar

The Raleigh/Durham radar (KRAX), 95 km from the middle of the area, began a volume at 20:03 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

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 8.0 hours before the alert went out and 42 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: 343 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 503 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 331 m²/s²
0-3 km storm-relative helicity: 381 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 4.7

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 Dec 24, 2:18 PM EST, 43 minutes earlier.

Area forecast discussion, Dec 24, 2:18 PM EST, 43 minutes before

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Hazardous weather outlook, Dec 24, 2:55 PM EST, 6 minutes before

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In the hours before

Special weather statement, Dec 24, 10:39 AM EST, 4 hours 22 minutes before

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Special weather statement, Dec 24, 3:01 PM EST, 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
Dec 23, 7:07 PM EST	Special Weather Statement	RAH	Sampson	53 min
Dec 23, 7:29 PM EST	Special Weather Statement	RAH	Sampson	46 min
Dec 23, 8:01 PM EST	Special Weather Statement	RAH	Wayne	59 min
Dec 23, 8:32 PM EST	River Flood Warning	RAH	Anson, Stanly	12 hr
Dec 23, 10:18 PM EST	River Flood Warning	RAH	Harnett	59 hr
Dec 23, 11:42 PM EST	River Flood Warning	RAH	Alamance	21 hr
Dec 24, 12:26 AM EST	Areal Flood Warning	RAH	Durham, Orange	9 hr
Dec 24, 6:04 AM EST	River Flood Warning	RAH	Cumberland	4 days
Dec 24, 10:24 AM EST	River Flood Warning	RAH	Franklin	44 hr
Dec 24, 10:39 AM EST	Special Weather Statement	RAH	Davidson, Forsyth, Guilford	51 min

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.