Alert archive / North Carolina / Frost Advisories in 2020

Frost Advisory 1, NWS Wilmington, NC

March 7, 2020New Hanover County, North Carolina; Georgetown County, South Carolina

NWS Wilmington, NC issued this frost advisory at Mar 7, 2020, 5:32 PM EST for New Hanover County, North Carolina; Georgetown County, South Carolina. It took effect at Mar 8, 2020, 4:00 AM EDT. It was in force for 5 hr.

The area

The counties it named.

The facts

Issued
Mar 7, 2020, 5:32 PM EST (22:32 UTC)
In effect from
Mar 8, 2020, 4:00 AM EDT
Expired
Mar 8, 2020, 9:00 AM EDT
In force
5 hr
Issued by
NWS Wilmington, NC

Counties New Hanover County, NC, Georgetown County, SC

The radar

The Wilmington radar (KLTX), 26 km from the middle of the area, began a volume at 22:32 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

Charleston AFB, SC (KCHS), launched 12:00Z, 10.5 hours before the alert went out and 165 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, Charleston AFB, SC at 12:00Z on 2020-03-07Temperature 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, Charleston AFB, SC at 12:00Z on 2020-03-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -63 square meters per square second.1939587897117Sfc1 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
1472 m above ground
0-6 km bulk shear
76 kt
0-1 km storm-relative helicity
-63 m²/s²
0-3 km storm-relative helicity
198 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 7, 8:49 AM ESTSmall Craft AdvisoryILM9 hr
Mar 7, 2:55 PM ESTFreeze WarningILMBladen, Brunswick, Columbus, New Hanover, Pender, Robeson17 hr

Nearby

Frost Advisories in North Carolina, 2020Frost Advisories in South Carolina, 2020Every frost advisory in 2020

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.