Alert archive / North Carolina / Freeze Watches in 2011

Freeze Watch 2, NWS Raleigh, NC

October 28, 201123 counties in North Carolina

NWS Raleigh, NC issued this freeze watch at Oct 28, 2011, 3:42 PM EDT for 23 counties in North Carolina. It took effect at Oct 30, 2011, 4:00 AM EDT. It was in force for .

The area

The counties it named.

The facts

Issued: Oct 28, 2011, 3:42 PM EDT (19:42 UTC)
In effect from: Oct 30, 2011, 4:00 AM EDT
Expired: Oct 29, 2011, 4:11 AM EDT
In force
Issued by: NWS Raleigh, NC

All 23 counties

Alamance County, NC, Anson County, NC, Chatham 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, Lee County, NC, Montgomery County, NC, Moore County, NC, Nash County, NC, Orange County, NC, Person County, NC, Randolph County, NC, Richmond County, NC, Stanly County, NC, Vance County, NC, Wake County, NC, Warren County, NC

The radar

The Raleigh/Durham radar (KRAX), 60 km from the middle of the area, began a volume at 19:47 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 12:00Z, 7.7 hours before the alert went out and 155 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: 605 m above ground
0-6 km bulk shear: 68 kt
0-1 km storm-relative helicity: -10 m²/s²
0-3 km storm-relative helicity: 186 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 freeze watch 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 freeze watch went out at Oct 28, 2:45 PM EDT, 57 minutes earlier.

Area forecast discussion, Oct 28, 2:45 PM EDT, 57 minutes before

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Hazardous weather outlook, Oct 28, 5:05 AM EDT, 10 hours 37 minutes before

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Nearby

Freeze Watches in North Carolina, 2011 Every freeze watch in 2011

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.