Alert archive / North Carolina / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 15, NWS Wilmington, NC

May 20, 1990Onslow County, North Carolina

NWS Wilmington, NC issued this severe thunderstorm warning at May 20, 1990, 7:28 PM EDT for Onslow County, North Carolina. It was in force for 47 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: May 20, 1990, 7:28 PM EDT (23:28 UTC)
Expired: May 20, 1990, 8:15 PM EDT
In force: 47 min
Issued by: NWS Wilmington, NC
Area: Whole counties

County Onslow County, NC

The radar

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

What was reported inside it

Time	Report	Where	Remark
May 20, 7:55 PM EDT	Hail 1	Onslow, NC

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 11.5 hours before the alert went out and 270 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1318 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 102 m²/s²
0-3 km storm-relative helicity: 117 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 20, 5:40 PM EDT, 1 hour 48 minutes before

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Special weather statement, May 20, 6:41 PM EDT, 47 minutes before

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Local storm report, May 20, 7:10 PM EDT, 18 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
May 20, 4:56 PM EDT	Severe Thunderstorm Warning	ILM	Beaufort	39 min
May 20, 6:40 PM EDT	Severe Thunderstorm Warning	ILM	Beaufort, Craven, Jones	65 min
May 20, 7:28 PM EDT	Severe Thunderstorm Warning	ILM	Beaufort, Craven, Pamlico	47 min

Nearby

Severe Thunderstorm Warnings in North 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.