Alert archive / North Carolina / Frost Advisories in 2021

Frost Advisory 1, NWS Wilmington, NC

April 22, 2021Bladen County, Pender County, Robeson County, North Carolina; Darlington County, Dillon County, Marlboro County, South Carolina

NWS Wilmington, NC issued this frost advisory at Apr 22, 2021, 7:39 PM EDT for Bladen County, Pender County, Robeson County, North Carolina; Darlington County, Dillon County, Marlboro County, South Carolina. It took effect at Apr 23, 2021, 3:00 AM EDT. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued
Apr 22, 2021, 7:39 PM EDT (23:39 UTC)
In effect from
Apr 23, 2021, 3:00 AM EDT
Expired
Apr 23, 2021, 9:00 AM EDT
In force
6 hr
Issued by
NWS Wilmington, NC

Counties Bladen County, NC, Pender County, NC, Robeson County, NC, Darlington County, SC, Dillon County, SC, Marlboro County, SC

The radar

The Wilmington radar (KLTX), 85 km from the middle of the area, began a volume at 23:38 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, 11.7 hours before the alert went out and 189 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 2021-04-22Temperature 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 2021-04-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -178 square meters per square second.1939587897117136Sfc1 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
1463 m above ground
0-6 km bulk shear
90 kt
0-1 km storm-relative helicity
-178 m²/s²
0-3 km storm-relative helicity
107 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

439 
WWUS72 KILM 222339
NPWILM

URGENT - WEATHER MESSAGE
National Weather Service Wilmington NC
739 PM EDT Thu Apr 22 2021

NCZ087-096-105-106-SCZ017-023-024-231300-
/O.NEW.KILM.FR.Y.0001.210423T0700Z-210423T1300Z/
Robeson-Bladen-Inland Pender-Coastal Pender-Marlboro-Darlington-
Dillon-
Including the cities of Lumberton, Elizabethtown, Bladenboro, 
Burgaw, Surf City, Bennettsville, McColl, Hartsville, Darlington,
North Hartsville, and Dillon
739 PM EDT Thu Apr 22 2021

...FROST ADVISORY IN EFFECT FROM 3 AM TO 9 AM EDT FRIDAY...

* WHAT...Temperatures between 33 and 36 will result in frost 
  formation.

* WHERE...In South Carolina, Marlboro, Darlington and Dillon 
  Counties. In North Carolina, Robeson, Bladen, Inland Pender 
  and Coastal Pender Counties.

* WHEN...From 3 AM to 9 AM EDT Friday.

* IMPACTS...Frost could kill sensitive outdoor vegetation if left
  uncovered.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

Nearby

Frost Advisories in North Carolina, 2021Frost Advisories in South Carolina, 2021Every frost advisory 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.