Alert archive / New Jersey / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 110, NWS Philadelphia/Mount Holly

August 16, 1997Sussex County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 16, 1997, 4:32 PM EDT for Sussex County, New Jersey. 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: Aug 16, 1997, 4:32 PM EDT (20:32 UTC)
Expired: Aug 16, 1997, 5:20 PM EDT
In force: 48 min
Issued by: NWS Philadelphia/Mount Holly
Area: Whole counties

County Sussex County, NJ

The radar

The Philadelphia radar (KDIX), 135 km from the middle of the area, began a volume at 20:33 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
Aug 16, 4:40 PM EDT	Thunderstorm Wind 60	Colesville, NJ

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
Aug 16, 3:00 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 8.5 hours before the alert went out and 156 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: 1064 J/kg
Mixed-layer CIN: -71 J/kg
Mixed-layer LCL: 834 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 147 m²/s²
0-3 km storm-relative helicity: 179 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 5.7

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KPHL 162031 RRA
SVRPHL
NJC037-162120-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PHILADELPHIA/MOUNT HOLLY NJ
432 PM EDT SAT AUG 16 1997

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 520 PM EDT FOR PEOPLE IN
THE FOLLOWING LOCATION...

IN  NEW JERSEY

   ...SUSSEX COUNTY
 
AT 429 PM...RADAR WAS TRACKING A LINE OF VERY STRONG THUNDERSTORMS
IN NORTHEAST PENNSYLVANIA. THIS LINE HAS A HISTORY OF DOWNING
TREES...CAUSINIG POWER OUTAGES...AND STRONG GUSTY WINDS WITHIN THE
PAST HALF HOUR OVER NORTHEAST PENNSYLVANIA. THE STORMS WILL BE MOVING
INTO SUSSEX COUNTY WITHIN THE NEXT 15 MINUTES.

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.

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

/JAE

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 16, 4:25 PM EDT	Severe Thunderstorm Warning	PHI	Warren	50 min
Aug 16, 4:47 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris	48 min
Aug 16, 5:02 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Somerset	63 min
Aug 16, 5:41 PM EDT	Severe Thunderstorm Warning	PHI	Mercer, Middlesex, Monmouth	49 min
Aug 16, 5:59 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Ocean	46 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 1997 Every severe thunderstorm warning in 1997

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; radar from the NEXRAD Level II archive.