Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 64, NWS State College, PA

May 18, 2000Clinton County, Lycoming County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at May 18, 2000, 4:30 PM EDT for Clinton County, Lycoming County, Pennsylvania. It was in force for 45 min. 2 reports came from inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.

The facts

Issued: May 18, 2000, 4:30 PM EDT (20:30 UTC)
Expired: May 18, 2000, 5:15 PM EDT
In force: 45 min
Issued by: NWS State College, PA
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Clinton County, PA, Lycoming County, PA

What was reported inside it

Time	Report	Where	Remark
May 18, 4:40 PM EDT	Thunderstorm Wind 62 M	Montoursville, PA	Winds gusted to 62mph at Lycoming County Airport.
May 18, 4:45 PM EDT	Thunderstorm Wind	Muncy, PA	Trees down.

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
May 18, 3:15 PM EDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 8.5 hours before the alert went out and 213 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: 186 J/kg
Mixed-layer CIN: -116 J/kg
Mixed-layer LCL: 934 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 182 m²/s²
0-3 km storm-relative helicity: 268 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KCTP 182035
SVRCTP
PAC035-081-182115-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
430 PM EDT THU MAY 18 2000

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CLINTON COUNTY.
  LYCOMING COUNTY.

* UNTIL 515 PM EDT.

* AT 428 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM ALONG A LINE EXTENDING FROM 10 MILES NORTHEAST
  OF MONTOURSVILLE TO 3 MILES NORTHWEST OF WILLIAMSPORT TO 14 MILES
  WEST OF LOCK HAVEN...MOVING SOUTHEAST AT 30 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  DUNNSTOWN AT 440 PM EDT.
  CASTANEA AND FLEMINGTON AT 445 TPM EDT.
  HUGHESVILLE AND MONTGOMERY AT 450 PM EDT.

THIS IS A DANGEROUS STORM. STAY INDOORS AWAY FROM WINDOWS.

.END/ JUNG/RXR

LAT...LON 4143 7675 4131 7713 4121 7787 4102 7739
          4115 7670 4126 7645

The office that day

Everything else NWS State College, PA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 18, 2:42 PM EDT	Severe Thunderstorm Warning	CTP	McKean, Potter, Warren	63 min
May 18, 3:01 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Elk	44 min
May 18, 3:04 PM EDT	Severe Thunderstorm Warning	CTP	Tioga	41 min
May 18, 3:34 PM EDT	Severe Thunderstorm Warning	CTP	Clinton, Lycoming	71 min
May 18, 3:40 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Elk	50 min
May 18, 3:43 PM EDT	Severe Thunderstorm Warning	CTP	Potter, Tioga	47 min
May 18, 3:51 PM EDT	Severe Thunderstorm Warning	CTP	Sullivan	69 min
May 18, 4:45 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Montour, Northumberland	60 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2000 Every severe thunderstorm warning in 2000

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.