Alert archive / North Carolina / Frost Advisories in 2019

Frost Advisory 5, NWS Raleigh, NC

November 1, 201914 counties in North Carolina

NWS Raleigh, NC issued this frost advisory at Nov 1, 2019, 3:16 AM EDT for 14 counties in North Carolina. It took effect at Nov 2, 2019, 2:00 AM EDT. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued: Nov 1, 2019, 3:16 AM EDT (07:16 UTC)
In effect from: Nov 2, 2019, 2:00 AM EDT
Expired: Nov 2, 2019, 9:00 AM EDT
In force: 7 hr
Issued by: NWS Raleigh, NC

Counties Cumberland County, NC, Edgecombe County, NC, Halifax County, NC, Harnett County, NC, Hoke County, NC, Johnston County, NC, Lee County, NC, Moore County, NC, Nash County, NC, Sampson County, NC, Scotland County, NC, Wake County, NC, Wayne County, NC, Wilson County, NC

The radar

The Raleigh/Durham radar (KRAX), 22 km from the middle of the area, began a volume at 07:19 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 00:00Z, 7.3 hours before the alert went out and 140 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: 145 J/kg
Mixed-layer CIN: -54 J/kg
Mixed-layer LCL: 748 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: 194 m²/s²
0-3 km storm-relative helicity: 224 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 3.2

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this frost 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 frost advisory went out at Nov 1, 1:59 AM EDT, 1 hour 17 minutes earlier.

Area forecast discussion, Nov 1, 1:59 AM EDT, 1 hour 17 minutes before

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Hazardous weather outlook, Nov 1, 1:32 AM EDT, 1 hour 44 minutes before

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In the hours before

Local storm report, Oct 31, 11:08 PM EDT, 4 hours 8 minutes before

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Local storm report, Oct 31, 11:11 PM EDT, 4 hours 5 minutes before

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Local storm report, Oct 31, 11:15 PM EDT, 4 hours 1 minute before

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Local storm report, Oct 31, 11:19 PM EDT, 3 hours 57 minutes before

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Special weather statement, Oct 31, 11:23 PM EDT, 3 hours 53 minutes before

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Local storm report, Oct 31, 11:27 PM EDT, 3 hours 49 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
Oct 31, 8:15 PM EDT	Severe Thunderstorm Warning	RAH	Durham, Franklin, Granville, Person, Vance, Warren	60 min
Oct 31, 8:58 PM EDT	Severe Thunderstorm Warning	RAH	Cumberland, Harnett, Hoke, Johnston, Moore, Sampson	26 min
Oct 31, 8:59 PM EDT	Severe Thunderstorm Warning	RAH	Franklin, Granville, Johnston, Wake	46 min
Oct 31, 9:05 PM EDT	Tornado Warning	RAH	Franklin, Wake	23 min
Oct 31, 9:14 PM EDT	Severe Thunderstorm Warning	RAH	Franklin, Halifax, Vance, Warren	28 min
Oct 31, 9:44 PM EDT	Special Weather Statement	RAH	Franklin, Halifax, Nash, Warren	76 min
Oct 31, 11:07 PM EDT	Special Weather Statement	RAH	Halifax	53 min
Oct 31, 11:23 PM EDT	Special Weather Statement	RAH	Sampson, Wayne	67 min
Nov 1, 3:16 AM EDT	Freeze Warning	RAH	Alamance, Anson, Chatham, Davidson, Durham, Forsyth and 11 more	30 hr

Nearby

Frost Advisories in North Carolina, 2019 Every frost advisory in 2019

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.