Alert archive / North Carolina / Freeze Watches in 2021

Freeze Watch 4, NWS Greenville-Spartanburg, SC

November 3, 202111 counties in North Carolina

NWS Greenville-Spartanburg, SC issued this freeze watch at Nov 3, 2021, 1:26 PM EDT for 11 counties in North Carolina. It took effect at Nov 5, 2021, 2:00 AM EDT. It was in force for .

The area

The counties it named.

The facts

Issued
Nov 3, 2021, 1:26 PM EDT (17:26 UTC)
In effect from
Nov 5, 2021, 2:00 AM EDT
Expired
Nov 4, 2021, 3:23 AM EDT
In force
Issued by
NWS Greenville-Spartanburg, SC

Counties Alexander County, NC, Burke County, NC, Cabarrus County, NC, Caldwell County, NC, Catawba County, NC, Cleveland County, NC, Davie County, NC, Iredell County, NC, Lincoln County, NC, McDowell County, NC, Rowan County, NC

The radar

The Greer radar (KGSP), 130 km from the middle of the area, began a volume at 17:24 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, 5.4 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-pSkew-T log-p diagram, Greensboro/Hi Pt, NC at 12:00Z on 2021-11-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Greensboro/Hi Pt, NC at 12:00Z on 2021-11-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -66 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
1747 m above ground
0-6 km bulk shear
60 kt
0-1 km storm-relative helicity
-66 m²/s²
0-3 km storm-relative helicity
119 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 Greenville-Spartanburg, SC wrote its last area forecast discussion before this freeze watch went out at Nov 3, 12:00 PM EDT, 1 hour 26 minutes earlier.

Area forecast discussion, Nov 3, 12:00 PM EDT, 1 hour 26 minutes before
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Hazardous weather outlook, Nov 3, 3:38 AM EDT, 9 hours 48 minutes before
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Nearby

Freeze Watches in North Carolina, 2021Every freeze watch in 2021

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.