Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 106, NWS Philadelphia/Mount Holly

August 16, 1997Carbon County, Monroe County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 16, 1997, 3:45 PM EDT for Carbon County, Monroe County, Pennsylvania. It was in force for 40 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: Aug 16, 1997, 3:45 PM EDT (19:45 UTC)
Expired: Aug 16, 1997, 4:25 PM EDT
In force: 40 min
Issued by: NWS Philadelphia/Mount Holly
Area: Whole counties

Counties Carbon County, PA, Monroe County, PA

What was reported inside it

Time	Report	Where	Remark
Aug 16, 4:10 PM EDT	Thunderstorm Wind	Pocono Lake, PA
Aug 16, 4:20 PM EDT	Thunderstorm Wind 74	Kresgeville, PA

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, 7.8 hours before the alert went out and 224 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 161947 RRA
SVRPHL
PAC025-089-162025-

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

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 425 PM EDT FOR PEOPLE IN
THE FOLLOWING LOCATION...

IN  PENNSYLVANIA

   ...CARBON COUNTY
   ...MONROE COUNTY
 

AT 335 PM EDT...A SEVERE THUNDERSTORM WAS INDICATED BY NWS DOPPLER
RADAR 16 MILES WEST NORTHWEST OF EAST SIDE MOVING EAST AT 57 MPH.
THE STORM PRODUCED WINDS OF 58 MPH AS IT MOVED THROUGH THE
WILLIAMPSORT AREA. THIS IS JUST ONE OF MANY THUNDERSTORMS IN A
LINE MOVING THROUGH NORTHEAST PENNSYLVANIA. ADDITIONAL WARNINGS WILL
BE NECESSARY.

THIS STORM MAY AFFECT THE FOLLOWING NEARBY AREAS... EAST SIDE... LAKE
HARMONY... BLAKESLEE... MECKESVILLE...POCONO LAKE AND MT. POCONO.

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 TELEVISION 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, 4:11 PM EDT	Severe Thunderstorm Warning	PHI	Lehigh, Northampton	44 min
Aug 16, 4:11 PM EDT	Severe Thunderstorm Warning	PHI	Berks	44 min
Aug 16, 5:02 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	63 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 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.