Alert archive / Delaware / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 41, NWS Wilmington, NC

July 10, 1990Kent County, New Castle County, Delaware

NWS Wilmington, NC issued this severe thunderstorm warning at Jul 10, 1990, 5:12 PM EDT for Kent County, New Castle County, Delaware. It was in force for 63 min.

The area

The counties it named.

The facts

Issued
Jul 10, 1990, 5:12 PM EDT (21:12 UTC)
Expired
Jul 10, 1990, 6:15 PM EDT
In force
63 min
Issued by
NWS Wilmington, NC
Area
Whole counties

Counties Kent County, DE, New Castle 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, 9.2 hours before the alert went out and 93 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 1990-07-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 169 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 1990-07-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -15 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
169 J/kg
Mixed-layer CIN
-185 J/kg
Mixed-layer LCL
1165 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
-15 m²/s²
0-3 km storm-relative helicity
46 m²/s²
Significant tornado parameter
-0.0
Supercell composite
-0.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KILG 102115 RRA
SVRILG
DEC001-003-102215-

BULLETIN - EBS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE WILMINGTON DE
512 PM EDT TUE JUL 10 1990

THE NATIONAL WEATHER SERVICE IN WILMINGTON HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  615 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...

IN CENTRAL DELAWARE

   ...KENT COUNTY


IN NORTH DELAWARE

   ...SOUTHERN NEW CASTLE COUNTY

WEATHER RADAR SHOWS A STRONG THUNDERSTORM OVER SOUTHERN CECIL COUNTY
MARYLAND APPROACHING THE THE SOUTHERN PORTION OF NEW CASTLE COUNTY
DELAWARE. IT WILL BE MOVING INTO SOUTHERN NEW CASTLE AND KENT COUNTIES
OF DELAWARE WITHIN THE HOUR. THE MARYLAND STATE POLICE AT NORTHEAST
REPORTED TREES BLOWN DOWN IN NORTHERN CECIL COUNTY AT 4 SEPARATE
LOCATED ASSOCIATED WITH THIS STORM.


WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A
STRONG BUILDING.  DO NOT STAND BY WINDOWS.  DON'T USE TELEPHONES
OR ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY UNTIL THE STORM
HAS PASSED.  MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS.
CS

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.