Alert archive / North Carolina / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 120, NWS Raleigh, NC

July 20, 20204 counties in North Carolina

NWS Raleigh, NC issued this severe thunderstorm warning at Jul 20, 2020, 5:05 PM EDT for 4 counties in North Carolina. It was in force for 40 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jul 20, 2020, 5:05 PM EDT (21:05 UTC)
Expired
Jul 20, 2020, 5:45 PM EDT
In force
40 min
Issued by
NWS Raleigh, NC
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Montgomery County, NC, Moore County, NC, Richmond County, NC, Scotland County, NC

The radar

The Raleigh/Durham radar (KRAX), 121 km from the middle of the area, began a volume at 21:03 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

Roanoke, VA (KRNK), launched 12:00Z, 9.1 hours before the alert went out and 231 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, Roanoke, VA at 12:00Z on 2020-07-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 456 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, Roanoke, VA at 12:00Z on 2020-07-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 74 square meters per square second.1939Sfc1 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
456 J/kg
Mixed-layer CIN
-52 J/kg
Mixed-layer LCL
933 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
74 m²/s²
0-3 km storm-relative helicity
-1 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 20, 3:49 AM EDTExcessive Heat WarningRAHCumberland, Edgecombe, Halifax, Harnett, Hoke, Johnston and 5 more17 hr
Jul 20, 3:23 PM EDTHeat AdvisoryRAHAlamance, Anson, Chatham, Cumberland, Davidson, Durham and 25 more30 hr
Jul 20, 3:27 PM EDTSpecial Weather StatementRAHGuilford48 min
Jul 20, 3:40 PM EDTSevere Thunderstorm WarningRAHGuilford25 min
Jul 20, 3:52 PM EDTAreal Flood AdvisoryRAHGuilford77 min
Jul 20, 4:33 PM EDTSpecial Weather StatementRAHAnson, Moore, Richmond57 min
Jul 20, 5:14 PM EDTSpecial Weather StatementRAHFranklin61 min
Jul 20, 5:47 PM EDTSpecial Weather StatementRAHHoke, Montgomery, Moore, Richmond, Scotland58 min
Jul 20, 6:21 PM EDTSpecial Weather StatementRAHJohnston39 min
Jul 20, 6:34 PM EDTSpecial Weather StatementRAHHarnett56 min
Jul 20, 6:56 PM EDTSpecial Weather StatementRAHWayne34 min
Jul 20, 7:45 PM EDTAreal Flood AdvisoryRAHWayne2 hr

Nearby

Severe Thunderstorm Warnings in North Carolina, 2020Every severe thunderstorm warning 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.