Alert archive / Delaware / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 80, NWS Philadelphia/Mount Holly

June 13, 1998Kent County, New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 13, 1998, 5:25 PM EDT for Kent County, New Castle County, Delaware. It was in force for 50 min. 2 reports 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: Jun 13, 1998, 5:25 PM EDT (21:25 UTC)
Expired: Jun 13, 1998, 6:15 PM EDT
In force: 50 min
Issued by: NWS Philadelphia/Mount Holly
Area: Whole counties

Counties Kent County, DE, New Castle County, DE

What was reported inside it

Time	Report	Where	Remark
Jun 13, 5:33 PM EDT	Thunderstorm Wind 50	Hartly, DE
Jun 13, 5:45 PM EDT	Thunderstorm Wind 50	Red Lion, 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 13, 1:30 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 12:00Z, 9.4 hours before the alert went out and 157 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: 2109 J/kg
Mixed-layer CIN: -44 J/kg
Mixed-layer LCL: 838 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 64 m²/s²
0-3 km storm-relative helicity: 116 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.0

Open this sounding in Storm Lab

The text

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

585 
WUUS1 KPHL 132126 RRA
SVRPHL
DEC001-003-132215-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
525 PM EDT SAT JUN 13 1998

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NEW CASTLE COUNTY IN DELAWARE
  KENT COUNTY IN DELAWARE

* UNTIL 615 PM EDT

* AT 524 PM EDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  A SEVERE THUNDERSTORM OVER THE EASTERN SHORE OF MARYLAND MOVING
  EAST TOWARD NEW CASTLE AND KENT COUNTIES IN DELAWARE. THESE
  THUNDERSTORMS COULD PRODUCE STRONG DAMAGING WINDS AND HAIL.

THIS IS A DANGEROUS STORM. MOVE INSIDE A STRONG BUILDING AND DO
NOT STAND NEAR WINDOWS. FOR YOUR PROTECTION MOVE TO AN INTERIOR
ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS.

DO NOT DRIVE YOUR CAR WHERE WATER COVERS THE ROADWAY. THE WATER
MAY BE DEEPER THAN YOU THINK. IF CAUGHT IN RISING FLOOD WATERS...
ABANDON YOUR CAR QUICKLY AND MOVE TO HIGHER GROUND.

FOR THE LATEST STORM INFORMATION...PLEASE TUNE TO NOAA WEATHER
RADIO...YOUR LOCAL RADIO OR TELEVISION STATIONS...OR YOUR CABLE
TELEVISION OUTLET.

AK/JM

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 13, 5:43 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	47 min

Nearby

Severe Thunderstorm Warnings in Delaware, 1998 Every severe thunderstorm warning in 1998

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.