Alert archive / North Carolina / Areal Flood Warnings in 2024

Areal Flood Warning 21, NWS Greenville-Spartanburg, SC

May 18, 2024Avery County, North Carolina

NWS Greenville-Spartanburg, SC issued this areal flood warning at May 18, 2024, 9:15 PM EDT for Avery County, North Carolina. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
May 18, 2024, 9:15 PM EDT (01:15 UTC)
Expired
May 19, 2024, 12:15 AM EDT
In force
3 hr
Issued by
NWS Greenville-Spartanburg, SC
Area
Storm-based polygon
Flood severity
None

County Avery County, NC

The radar

The Knoxville radar (KMRX), 133 km from the middle of the area, began a volume at 01:16 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, 1.3 hours before the alert went out and 182 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 00:00Z on 2024-05-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 40 joules per kilogram.LCLLFCEL10008507005003002001001 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 00:00Z on 2024-05-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -75 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
40 J/kg
Mixed-layer CIN
-25 J/kg
Mixed-layer LCL
781 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
-75 m²/s²
0-3 km storm-relative helicity
-2 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 18, 8:19 PM EDTSpecial Weather StatementGSPYancey41 min
May 18, 8:42 PM EDTSpecial Weather StatementGSPLincoln48 min
May 18, 8:50 PM EDTAreal Flood AdvisoryGSPYancey3 hr
May 18, 9:14 PM EDTSpecial Weather StatementGSPCleveland31 min
May 19, 2:53 PM EDTSpecial Weather StatementGSPMadison37 min
May 18, 11:31 PM EDTSpecial Weather StatementGSPChester44 min
May 18, 11:52 PM EDTSpecial Weather StatementGSPUnion38 min
May 19, 1:40 AM EDTAreal Flood AdvisoryGSPChester2 hr

Nearby

Areal Flood Warnings in North Carolina, 2024Every areal flood warning in 2024

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.