Alert archive / South Carolina / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 14, NWS Columbia, SC

May 28, 1990Orangeburg County, South Carolina

NWS Columbia, SC issued this severe thunderstorm warning at May 28, 1990, 2:31 PM EDT for Orangeburg County, South Carolina. It was in force for 59 min.

The area

The counties it named.

The facts

Issued: May 28, 1990, 2:31 PM EDT (18:31 UTC)
Expired: May 28, 1990, 3:30 PM EDT
In force: 59 min
Issued by: NWS Columbia, SC
Area: Whole counties

County Orangeburg County, SC

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Athens Municipal, GA (KAHN), launched 12:00Z, 6.5 hours before the alert went out and 238 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 291 J/kg
Mixed-layer CIN: -119 J/kg
Mixed-layer LCL: 1088 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 55 m²/s²
0-3 km storm-relative helicity: 140 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, May 28, 11:47 AM EDT, 2 hours 44 minutes before

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Special weather statement, May 28, 1:05 PM EDT, 1 hour 26 minutes before

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Special weather statement, May 28, 1:37 PM EDT, 54 minutes before

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Special weather statement, May 28, 2:27 PM EDT, 4 minutes before

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The office that day

Everything else NWS Columbia, SC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 27, 8:17 PM EDT	Severe Thunderstorm Warning	CAE	Orangeburg	58 min
May 28, 2:42 PM EDT	Severe Thunderstorm Warning	CAE	Sumter	63 min
May 28, 3:06 PM EDT	Severe Thunderstorm Warning	CAE	Clarendon	69 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 1990 Every severe thunderstorm warning in 1990

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.