Tornadoes · United States · Pennsylvania · 1998

F2 tornado, Markleton to Boynton, Pennsylvania, June 2, 1998

From Markleton to Boynton, this F2 tornado ran 15.0 miles across Somerset County on June 2, 1998, touching down at 7:00 PM EDT and reaching 880 yards wide. It killed nobody.

The rating scale

Tracks are drawn in the color of the rating. The Fujita scale rates the damage rather than measuring the wind: the speeds are what that damage is taken to imply.

  1. F040 to 72 mph

    Light damage. Surface peeled off some roofs, gutters and siding damaged, branches broken, shallow-rooted trees pushed over.

  2. F173 to 112 mph

    Moderate damage. Roofs badly stripped, mobile homes overturned or badly damaged, exterior doors lost, windows broken.

  3. F2113 to 157 mphthis tornado

    Considerable damage. Roofs torn off well-built houses, frame homes shifted on their foundations, mobile homes destroyed, large trees snapped or uprooted, cars lifted off the ground.

  4. F3158 to 206 mph

    Severe damage. Whole stories of well-built houses destroyed, large buildings badly damaged, trains overturned, trees debarked, heavy cars lifted and thrown.

  5. F4207 to 260 mph

    Devastating damage. Well-built houses leveled, structures with weak foundations moved some distance, cars thrown and large missiles generated.

  6. F5261 to 318 mph

    Incredible damage. Strong frame houses swept off their foundations, car-sized missiles thrown more than 100 meters, steel-reinforced concrete badly damaged, high-rise buildings deformed.

  7. Unrated

    The survey recorded a tornado but could not put a number on it, most often because it crossed open country and damaged nothing a rating can be read from.

The record

Rating
F2
Date
June 2, 1998
Touchdown
7:00 PM EDT (23:00 UTC)
Path length
15.0 miles (24.1 km)
Path width
880 yards (805 m)
Deaths
0
Injuries
0
County
Somerset County
Touchdown point
39.850, -79.230
Lift-off point
39.770, -79.070
Record number
1327

What the Weather Service recorded

This F2 tornado was the first of two tornadoes to cross southern Somerset County on the evening of June 2. It would cross the path of the May 31st tornado that struck Salisbury. The tornado initially touched down about 4 miles southeast of Markleton, then tracked southeast for 12 miles across the Boynton area and ended in Pocahontas crossing the May 31st track about 6 miles east of Salisbury. The town of Boynton was hard hit, but most of the remaining damage in Pennsylvania was to trees. A carpentry shop near Pocahontas that had been destroyed by the May 31st tornado on Sunday was already being rebuilt by Amish farmers when the framing was blown over by this tornado. There were no deaths or injuries. See additional details in the Seven Springs to Frostburg tornado that paralleled the track of this storm just two hours later.

From NOAA NCEI's Storm Events Database, the narrative the local forecast office wrote for Storm Data.

The air that afternoon

The radiosonde launches on either side of the tornado, from the nearest station that was launching then, drawn and analyzed the way Storm Lab does: the same diagram, the same parcel and shear definitions SPC's mesoanalysis uses.

Pittsburgh, PA (KPIT), 12:00Z

11.0 hours before the tornado, 105 km from the path. June 2, 1998.

Skew-T log-pSkew-T log-p diagram, Pittsburgh, PA at 12:00Z on 1998-06-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 158 joules per kilogram, CIN -77, lifted condensation level 1288 meters above ground. Wind barbs in knots down the right edge.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed. The warm shading is its CAPE, the cool shading the inhibition it has to break through.
HodographHodograph, Pittsburgh, PA at 12:00Z on 1998-06-02The wind through the lowest 10 kilometers as a curve, rings every 10 meters per second labeled in knots. Zero to 1 km storm-relative helicity 224 square meters per square second, 0 to 6 km bulk shear 57 knots.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km. RM and LM are the right and left moving storms Bunkers' method gives; the shaded area is the 0 to 1 km storm-relative helicity.
Mixed-layer CAPE
158 J/kg
Mixed-layer CIN
-77 J/kg
Surface CAPE
0 J/kg
Mixed-layer LCL
1288 m above ground
0-6 km bulk shear
57 kt
0-1 km bulk shear
24 kt
0-1 km storm-relative helicity
224 m²/s²
0-3 km storm-relative helicity
261 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.1
0-3 km lapse rate
5.5 K/km

Open this sounding in Storm Lab

Pittsburgh, PA (KPIT), 00:00Z

1.0 hours after it, 105 km from the path. June 3, 1998.

Skew-T log-pSkew-T log-p diagram, Pittsburgh, PA at 00:00Z on 1998-06-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 1770 joules per kilogram, CIN -32, lifted condensation level 1107 meters above ground. Wind barbs in knots down the right edge.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed. The warm shading is its CAPE, the cool shading the inhibition it has to break through.
HodographHodograph, Pittsburgh, PA at 00:00Z on 1998-06-03The wind through the lowest 10 kilometers as a curve, rings every 10 meters per second labeled in knots. Zero to 1 km storm-relative helicity 352 square meters per square second, 0 to 6 km bulk shear 59 knots.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km. RM and LM are the right and left moving storms Bunkers' method gives; the shaded area is the 0 to 1 km storm-relative helicity.
Mixed-layer CAPE
1770 J/kg
Mixed-layer CIN
-32 J/kg
Surface CAPE
805 J/kg
Mixed-layer LCL
1107 m above ground
0-6 km bulk shear
59 kt
0-1 km bulk shear
42 kt
0-1 km storm-relative helicity
352 m²/s²
0-3 km storm-relative helicity
383 m²/s²
Significant tornado parameter
4.1
Supercell composite
19.4
0-3 km lapse rate
5.7 K/km

Open this sounding in Storm Lab

The surface observations

Latrobe/Westmorland (LBE), 56 km from the path, in the two hours either side.

Time (UTC)Temp (°F)Dew point (°F)WindGust (kt)Pressure (mb)Weather
00:00 UTC

From the Iowa Environmental Mesonet's archive of airport observations.

The radar

The Pittsburgh radar (KPBZ), 121 km away, was scanning. The volume nearest the touchdown began at 23:02 UTC.

Open the radar archive at this moment, over the track

Reflectivity and velocity, decoded from the Level II archive in the browser. Volumes take a few seconds to open the first time.

This ground now

The live radar over the trackEvery 1998 tornado in PennsylvaniaEvery tornado in Pennsylvania since 1950Warnings in force in Pennsylvania nowThe forecast where you are

The other tornadoes of June 2, 1998

36 more were confirmed in the United States that day.

DateTimeRatingWherePath (mi)Width (yd)DeathsInjuriesDamage
June 23:15 AM CDTF1Rutherford, TN1.0200$1.6 million
June 211:28 AM EDTF0Saluda, SC0.340
June 22:50 PM EDTF0Gallia, OH0.340$50,000
June 23:15 PM EDTF1Mason, WV0.7401$70,000
June 23:16 PM EDTF1Putnam, WV0.340$20,000
June 23:58 PM EDTF1Kanawha, WV1.580$100,000
June 24:19 PM EDTF0Kanawha, WV0.560$10,000
June 25:15 PM EDTF0Carteret, NC17.050$1,000
June 25:30 PM EDTF1Beaver, PA7.0300$400,000
June 25:45 PM EDTF1McKean, PA8.0440
June 25:55 PM EDTF1Allegheny, PA32.070050$13 million
June 26:45 PM EDTF2Wyoming, NY15.0250$1.0 million
June 26:45 PM EDTF1Jefferson, PA1.3100$250,000
June 26:50 PM EDTF1Westmoreland, PA8.02001$200,000
June 27:30 PM EDTF0Beaver, PA0.230$10,000
June 27:30 PM EDTF0Clearfield, PA0.250
June 27:40 PM EDTF0York, PA4.030
June 27:50 PM EDTF1Cortland, NY0.160$150,000
June 27:50 PM EDTF1Blair, PA4.0150
June 27:53 PM EDTF1Chenango, NY0.3100$250,000
June 27:56 PM EDTF1Allegany, MD1.050
June 28:20 PM EDTF0Allegheny, PA1.050$20,000
June 28:21 PM EDTF0Allegany, MD0.550
June 28:36 PM EDTF1Hampshire, WV9.0150$30,000
June 29:00 PM EDTF0Fayette, PA0.350$10,000
June 28:02 PM CDTF4Somerset, PA to MD36.51,2005$5.5 million
June 29:05 PM EDTF1Susquehanna, PA12.0100$300,000
June 28:35 PM CDTF2Fayette, PA to WV, MD12.0300$9.0 million
June 29:35 PM EDTF0Centre, PA0.570
June 29:40 PM EDTF1Northumberland, PA15.0440
June 29:45 PM EDTF1Bradford, PA6.0400$400,000
June 29:50 PM EDTF0Clarke, VA0.550$10,000
June 210:00 PM EDTF3Wyoming, PA26.0500215$2.2 million
June 210:10 PM EDTF0Loudoun, VA1.050
June 210:33 PM EDTF2Mineral, WV15.01505$250,000
June 210:40 PM EDTF1Lackawanna, PA3.0200$300,000

What this means

Ratings are the survey's, read off the damage rather than measured; the rating scale is above. Tornado counts rise through the record as reporting improved, so a year in the 1950s is not comparable with one today except for the strongest tornadoes, which were always noticed.

Sources

NOAA Storm Prediction Center tornado database, 1950-2025, the official record kept by NOAA's Storm Prediction Center.