Alert archive / South Carolina / Mesoscale Discussions in 2019

Mesoscale Discussion 9

January 4, 20198 counties in South Carolina

The Storm Prediction Center issued this mesoscale discussion at Jan 4, 2019, 6:22 PM EST for 8 counties in South Carolina. It was in force for 113 min.

The area

The outline as issued.

The facts

Issued
Jan 4, 2019, 6:22 PM EST (23:22 UTC)
Expired
Jan 4, 2019, 8:15 PM EST
In force
113 min
Issued by
the Storm Prediction Center
Chance of a watch
5%

Counties Abbeville County, SC, Anderson County, SC, Chester County, SC, Fairfield County, SC, Greenwood County, SC, Laurens County, SC, Newberry County, SC, Union County, SC

The radar

The Greer radar (KGSP), 54 km from the middle of the area, began a volume at 23:26 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

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 11.4 hours before the alert went out and 252 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, Peachtre/Fal Fld, GA at 12:00Z on 2019-01-04Temperature 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, Peachtre/Fal Fld, GA at 12:00Z on 2019-01-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 369 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
450 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
369 m²/s²
0-3 km storm-relative helicity
443 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

As transmitted.

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Nearby

Mesoscale Discussions in South Carolina, 2019Every mesoscale discussion in 2019

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.