Alert archive / Delaware / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 17, NWS Wilmington, NC

June 9, 1990Kent County, Delaware

NWS Wilmington, NC issued this severe thunderstorm warning at Jun 9, 1990, 6:18 PM EDT for Kent County, Delaware. It was in force for 27 min.

The area

The counties it named.

The facts

Issued
Jun 9, 1990, 6:18 PM EDT (22:18 UTC)
Expired
Jun 9, 1990, 6:45 PM EDT
In force
27 min
Issued by
NWS Wilmington, NC
Area
Whole counties

County Kent County, DE

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

Atlantic City In, NJ (KACY), launched 12:00Z, 10.3 hours before the alert went out and 95 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, Atlantic City In, NJ at 12:00Z on 1990-06-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 869 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, Atlantic City In, NJ at 12:00Z on 1990-06-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 47 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
869 J/kg
Mixed-layer CIN
-122 J/kg
Mixed-layer LCL
729 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
47 m²/s²
0-3 km storm-relative helicity
57 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.8

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.

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 9, 7:20 PM EDTSevere Thunderstorm WarningILMNew Castle40 min

Nearby

Severe Thunderstorm Warnings in Delaware, 1990Every 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.