Alert archive / North Carolina / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 58, NWS Wilmington, NC

July 20, 2007Columbus County, North Carolina

NWS Wilmington, NC issued this severe thunderstorm warning at Jul 20, 2007, 6:09 PM EDT for Columbus County, North Carolina. It was in force for 51 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, 2007, 6:09 PM EDT (22:09 UTC)
Expired
Jul 20, 2007, 7:00 PM EDT
In force
51 min
Issued by
NWS Wilmington, NC
Area
Counties, with a storm outline in the text

County Columbus County, NC

The radar

The Wilmington radar (KLTX), 37 km from the middle of the area, began a volume at 22:11 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

Newport, NC (KMHX), launched 12:00Z, 10.2 hours before the alert went out and 172 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, Newport, NC at 12:00Z on 2007-07-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1571 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, Newport, NC at 12:00Z on 2007-07-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 18 square meters per square second.193958Sfc1 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
1571 J/kg
Mixed-layer CIN
-61 J/kg
Mixed-layer LCL
1293 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
18 m²/s²
0-3 km storm-relative helicity
63 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 20, 1:47 PM EDTMarine Weather StatementILM58 min
Jul 20, 2:40 PM EDTMarine Weather StatementILM95 min
Jul 20, 3:12 PM EDTMarine Weather StatementILM93 min
Jul 20, 4:18 PM EDTSevere Thunderstorm WarningILMWilliamsburg42 min
Jul 20, 4:28 PM EDTMarine Weather StatementILM62 min
Jul 20, 4:42 PM EDTSpecial Marine WarningILM63 min
Jul 20, 5:11 PM EDTSpecial Marine WarningILM94 min
Jul 20, 5:43 PM EDTSpecial Marine WarningILM62 min
Jul 20, 2:32 PM EDTAreal Flood AdvisoryILMPender118 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 2007Every severe thunderstorm warning in 2007

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.