Alert archive / North Carolina / Winter Weather Advisories in 2017

Winter Weather Advisory 2, NWS Raleigh, NC

January 7, 201731 counties in North Carolina

NWS Raleigh, NC issued this winter weather advisory at Jan 7, 2017, 3:17 PM EST for 31 counties in North Carolina. It was in force for 69 hr.

The area

The counties it named.

The facts

Issued: Jan 7, 2017, 3:17 PM EST (20:17 UTC)
Expired: Jan 10, 2017, 11:58 AM EST
In force: 69 hr
Issued by: NWS Raleigh, NC

All 31 counties

Alamance County, NC, Anson County, NC, Chatham County, NC, Cumberland County, NC, Davidson County, NC, Durham County, NC, Edgecombe County, NC, Forsyth County, NC, Franklin County, NC, Granville County, NC, Guilford County, NC, Halifax County, NC, Harnett County, NC, Hoke County, NC, Johnston County, NC, Lee County, NC, Montgomery County, NC, Moore County, NC, Nash County, NC, Orange County, NC, Person County, NC, Randolph County, NC, Richmond County, NC, Sampson County, NC, Scotland County, NC, Stanly County, NC, Vance County, NC, Wake County, NC, Warren County, NC, Wayne County, NC, Wilson County, NC

The radar

The Raleigh/Durham radar (KRAX), 45 km from the middle of the area, began a volume at 20:17 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, 8.3 hours before the alert went out and 93 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 554 m above ground
0-6 km bulk shear: 114 kt
0-1 km storm-relative helicity: -84 m²/s²
0-3 km storm-relative helicity: 433 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this winter weather advisory 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 winter weather advisory went out at Jan 7, 3:10 PM EST, 7 minutes earlier.

Area forecast discussion, Jan 7, 3:10 PM EST, 7 minutes before

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Hazardous weather outlook, Jan 7, 7:29 AM EST, 7 hours 48 minutes before

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In the hours before

Local storm report, Jan 7, 2:47 PM EST, 30 minutes before

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Local storm report, Jan 7, 2:57 PM EST, 20 minutes before

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Local storm report, Jan 7, 3:03 PM EST, 14 minutes before

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Local storm report, Jan 7, 3:10 PM EST, 7 minutes before

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Local storm report, Jan 7, 3:13 PM EST, 4 minutes before

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Local storm report, Jan 7, 3:14 PM EST, 3 minutes before

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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 7, 2:21 AM EST	Special Weather Statement	RAH	Alamance, Davidson, Forsyth, Guilford, Person	84 min
Jan 7, 2:35 AM EST	Special Weather Statement	RAH	Chatham, Durham, Franklin, Halifax, Lee, Montgomery and 5 more	85 min

Nearby

Winter Weather Advisories in North Carolina, 2017 Every winter weather advisory in 2017

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.