Alert archive / Delaware / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 26, NWS Wilmington, NC

July 1, 1990Sussex County, Delaware

NWS Wilmington, NC issued this severe thunderstorm warning at Jul 1, 1990, 5:06 PM EDT for Sussex County, Delaware. It was in force for 54 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: Jul 1, 1990, 5:06 PM EDT (21:06 UTC)
Expired: Jul 1, 1990, 6:00 PM EDT
In force: 54 min
Issued by: NWS Wilmington, NC
Area: Whole counties

County Sussex County, DE

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
Jul 1, 5:15 PM EDT	Thunderstorm Wind 0	Sussex, DE

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

Wallops Is Stn, VA (KWAL), launched 12:00Z, 9.1 hours before the alert went out and 84 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: 6 J/kg
Mixed-layer CIN: -325 J/kg
Mixed-layer LCL: 1439 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 113 m²/s²
0-3 km storm-relative helicity: 147 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, Jul 1, 3:54 PM EDT, 1 hour 12 minutes before

NCZ001-002-003-012046-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CAPE HATTERAS NC
345 PM EDT SUN JUL 01 1990

AT 330 PM EDT...WEATHER RADAR WAS TRACKING A STRONG THUNDERSTORMS
OVER SOUTHAMPTON COUNTY IN VIRGINIA AND NORTHAMPTON COUNTY IN NORTH
CAROLINA. THESE THUNDERSTORMS ARE CONTINUING TO INTENSIFY AND MAY
APPROACH SEVERE LIMITS AS THEY MOVE INTO NORTHERN HERTFORD AND GATES
COUNTIES IN NORTH CAROLINA DURING THE NEXT HOUR.

PEOPLE IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR STRONG GUSTY WINDS
...FREQUENT CLOUD TO GROUND LIGHTNING AND POSSIBLY HAIL FROM THIS
STORM. HEAVY RAINS WILL ALSO BE A PROBLEM...POTENTIALLY
CREATING LOCALIZED FLOODING CONDITIONS.

FT

Local storm report, Jul 1, 5:01 PM EDT, 5 minutes before

STORM REPORT
NATIONAL WEATHER SERVICE CAPE HATTERAS NC
500 PM EDT SUN JUL 01 1990

 TIME            EVENT
1630 EDT        GOLF BALL SIZE HAIL       REPORTED BY WEATHER SPOTTERS
                                           NEAR THE TOWN OF SUNBURY AND
                                           WHITE OAK AREA OF GATES
                                           COUNTY

1645 EDT         GOLF BALL SIZE HAIL       REPORTED BY THE HERTFORD
               '                            COUNTY SHERIFF

LEIN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 1, 6:09 PM EDT	Severe Thunderstorm Warning	ILM	Sampson	66 min
Jul 1, 6:49 PM EDT	Severe Thunderstorm Warning	ILM	Duplin, Pender	56 min
Jul 1, 7:05 PM EDT	Severe Thunderstorm Warning	ILM	Bladen, Columbus	55 min
Jul 1, 7:28 PM EDT	Severe Thunderstorm Warning	ILM	Brunswick	62 min
Jul 1, 7:28 PM EDT	Severe Thunderstorm Warning	ILM	Onslow	62 min
Jul 1, 7:38 PM EDT	Severe Thunderstorm Warning	ILM	New Hanover	67 min
Jul 1, 1:17 AM EDT	Severe Thunderstorm Warning	ILM	Kent, Sussex	118 min
Jul 1, 5:26 PM EDT	Severe Thunderstorm Warning	ILM	Kent	34 min

Nearby

Severe Thunderstorm Warnings in Delaware, 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.