Alert archive / Maryland / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 78, NWS Philadelphia/Mount Holly

June 13, 1998Cecil County, Maryland

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 13, 1998, 5:12 PM EDT for Cecil County, Maryland. It was in force for 48 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: Jun 13, 1998, 5:12 PM EDT (21:12 UTC)
Expired: Jun 13, 1998, 6:00 PM EDT
In force: 48 min
Issued by: NWS Philadelphia/Mount Holly
Area: Whole counties

County Cecil County, MD

What was reported inside it

Time	Report	Where	Remark
Jun 13, 5:50 PM EDT	Thunderstorm Wind 50	Charlestown, MD

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

Washington/Dulle, VA (KIAD), launched 12:00Z, 9.2 hours before the alert went out and 142 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: 38 J/kg
Mixed-layer CIN: -154 J/kg
Mixed-layer LCL: 1171 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 11 m²/s²
0-3 km storm-relative helicity: 1 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

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

469 
WUUS1 KPHL 132113 RRA
SVRPHL
MDC015-132200-

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

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CECIL COUNTY IN MARYLAND

* UNTIL 600 PM EDT

* AT 511 PM EDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  A POSSIBLY SEVERE THUNDERSTORM IN HARFORD COUNTY MOVING EAST AT
  35 MPH. THIS STORM COULD PRODUCE DAMAGING WIND GUSTS AND LARGE
  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, 4:33 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Queen Anne's	62 min
Jun 13, 5:22 PM EDT	Severe Thunderstorm Warning	PHI	Caroline	33 min

Nearby

Severe Thunderstorm Warnings in Maryland, 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.