Scattered showers and thunderstorms developed in a humid airmass ahead of an approaching cold front, producing numerous wind damage reports across the Lower Susquehanna Valley during the late morning and early afternoon hours of June 19, 2017. Storms were east of the area by late afternoon.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS CTP wrote it up.
Scattered showers and thunderstorms developed in a humid airmass ahead of an approaching cold front, producing numerous wind damage reports across the Lower Susquehanna Valley during the late morning and early afternoon hours of June 19, 2017. Storms were east of the area by late afternoon.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS State College, PA wrote its last area forecast discussion before the first event at Jun 19, 9:24 AM EST, 1 hour 16 minutes earlier.
Area Forecast Discussion National Weather Service State College PA 1024 AM EDT Mon Jun 19 2017 .SYNOPSIS... An upper level trough will shift east across the Great Lakes, pushing a cold front through Pennsylvania today. The upper trough will swing through the area during the middle of the week, then lift out by Friday. && .NEAR TERM /UNTIL 6 PM THIS EVENING/... A diffuse cold front is entering the CWA as of mid morning. A fairly solid area of showers extends from central NY state down through the western 1/3 of my forecast area. There are embedded thunderstorms and even the hint of a weak bowing segment of a line at 10AM between UNV and FIG. The focus of the convection will continue to shift eastward into the Central Mountains as the morning progresses, and into the Susq Vally by mid day and early afternoon. It's this area of highest concern with deep tropical moisture and sunshine already pushing temperatures into the 80s. Sunshine and associated diurnal heating will result in moderate CAPEs across the southeast portion of the forecast area by early afternoon. SPC has a slight risk over eastern counties, with a wedge of enhanced risk over Lancaster/York counties. The HRRR and RAP both show the instability shifting east rapidly implying this should be a relatively early in the day event. The unstable environment, combined with anomalous PWATS, also supports the idea of tropical downpours. Convection- allowing models showing spot amounts of around 2-3 inches over the Lower Susq Valley, which could result in flooding, especially in urban areas, but recent dryness and high FFG values suggest significant flooding elsewhere may not be very likely. && .SHORT TERM /6 PM THIS EVENING THROUGH 6 PM TUESDAY/... Cooler/drier conditions tonight, as the cold front pushes east of the region. However, will have to retain a low probability of showers for much of the night associated with passage of upper level trough. Another shortwave rotating through base of trough will swing through central Pa late Tuesday, likely accompanied by a few more showers and possible tsra, mainly across the northwest mountains. Model soundings showing a well mixed boundary layer and 850 temps between 10-12C, which should support max temps from the low 70s over the northwest mountains, to the low 80s across the Susq Valley. && .LONG TERM /TUESDAY NIGHT THROUGH SUNDAY/... One last day under influence of upper trough on Wednesday, with relatively cool weather and a low chance of showers, then trough lifts out. 00Z NAEFS showing an area of low pressure passing north of Pa late in the week. GEFS plumes support a chance of showers/storms with warm front passage Thursday or Thursday night, then a better chance of shower/storms Friday, as trailing cold front pushes into the area. Bulk of med range guidance currently leaning toward dry weather Saturday, followed by possible showers/storms by late in the weekend, as another sfc low tracks north of Pa and trailing cold front tracks across Pa. && .AVIATION /14Z MONDAY THROUGH FRIDAY/... An upper level trough will shift east across the Great Lakes, pushing a cold front through Pennsylvania today, with high likelihood for strong to potentially severe thunderstorms over mainly eastern half of CWA. But first, ceiling restrictions over mainly western sections will spread into central mountains through mid morning as area of showers pushes through. Restrictions will lift this afternoon with cold fropa, then scattered showers will again become a poss over NW Mtns late in the day. For the east, the advancing line of showers will develop into a potentially potent line of thunderstorms around or just east of an AOO-UNV-IPT line midday and advance across the Susq Valley through mid/late afternoon. Wind gusts to 60-70 mph likely in strongest storms. Generally VFR conditions behind the front tonight, with cig restrictions possible in NW Mtns and some patchy fog poss areawide. .OUTLOOK... Tue...Sct SHRA NW. No sig wx. Wed...Mainly dry with VFR conditions. Thu...Sct SHRA and storms...mainly N. Fri...Sct showers and thunderstorms. && .CTP WATCHES/WARNINGS/ADVISORIES... Flash Flood Watch from 2 PM this afternoon to 9 PM EDT this evening for PAZ059-064>066. && SYNOPSIS...Fitzgerald/La Corte NEAR TERM...Fitzgerald/La Corte SHORT TERM...Fitzgerald LONG TERM...Fitzgerald AVIATION...RXR
Hazardous Weather Outlook National Weather Service State College PA 1120 AM EDT Mon Jun 19 2017 PAZ036-051>053-056>058-063-201530- Franklin-Montour-Northumberland-Columbia-Perry-Dauphin-Schuylkill- Cumberland- 1120 AM EDT Mon Jun 19 2017 ...SEVERE THUNDERSTORM WATCH 354 IN EFFECT UNTIL 8 PM EDT THIS EVENING... This Hazardous Weather Outlook is for central Pennsylvania. .DAY ONE...This Afternoon and Tonight. Please listen to NOAA Weather Radio or go to weather.gov/StateCollege on the internet for more information about the following hazards. Severe Thunderstorm Watch. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. PAZ059-064>066-201530- Lebanon-Adams-York-Lancaster- 1120 AM EDT Mon Jun 19 2017 ...SEVERE THUNDERSTORM WATCH 354 IN EFFECT UNTIL 8 PM EDT THIS EVENING... ...FLASH FLOOD WATCH IN EFFECT UNTIL 9 PM EDT THIS EVENING... This Hazardous Weather Outlook is for central Pennsylvania. .DAY ONE...This Afternoon and Tonight. Please listen to NOAA Weather Radio or go to weather.gov/StateCollege on the internet for more information about the following hazards. Severe Thunderstorm Watch. Flash Flood Watch. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. PAZ004>006-010>012-017>019-024>028-033>035-037-041-042-045-046-049- 050-201530- Warren-McKean-Potter-Elk-Cameron-Northern Clinton-Clearfield- Northern Centre-Southern Centre-Cambria-Blair-Huntingdon-Mifflin- Juniata-Somerset-Bedford-Fulton-Tioga-Northern Lycoming-Sullivan- Southern Clinton-Southern Lycoming-Union-Snyder- 1120 AM EDT Mon Jun 19 2017 This Hazardous Weather Outlook is for central Pennsylvania. .DAY ONE...This Afternoon and Tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
Special Weather Statement
National Weather Service State College PA
1032 AM EDT MON JUN 19 2017
PAZ006-012-018-037-041-191530-
Potter PA-Northern Centre PA-Northern Clinton PA-
Northern Lycoming PA-Tioga PA-
1032 AM EDT MON JUN 19 2017
...STRONG THUNDERSTORMS WILL AFFECT PARTS OF POTTER...NORTHERN
CENTRE...NORTHERN CLINTON...NORTHERN LYCOMING...AND TIOGA COUNTIES
UNTIL 1130 AM EDT...
At 1032 AM EDT, Doppler radar indicated strong thunderstorms along a
line extending from near Kettle Creek State Park to near Westport to
near Clarence. Movement was northeast at 45 mph.
Winds in excess of 40 mph are possible.
Locations impacted include...
Wellsboro, Cross Fork, Monument, Glen Union, Waterville, Leonard
Harrison State Park, Covington, Keating, Tamarack, Kettle Creek State
Park, Cedar Run, Cammal, Ole Bull State Park, Blossburg, Morris,
Little Pine State Park, Westport, Leetonia, Hyner and South Renovo.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 4171 7698 4141 7711 4096 7797 4119 7787
4130 7804 4138 7799 4189 7725
TIME...MOT...LOC 1432Z 232DEG 39KT 4132 7793 4124 7781 4108 7787
La CortePRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
1042 AM EDT MON JUN 19 2017
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0700 PM TSTM WND DMG HOWARD 41.01N 77.66W
06/18/2017 CENTRE PA FIRE DEPT/RESCUE
TREE DOWN ON A HOUSE. ROOF OFF LITTLE LEAGUE DUGOUT ON
FIELD BEHIND THE HOUSE. 251 E. MAIN ST
&&
EVENT NUMBER CTP1701236
LA CORTESpecial Weather Statement
National Weather Service State College PA
1053 AM EDT MON JUN 19 2017
PAZ052-056>059-063-191530-
Perry-Northumberland-Cumberland-Lebanon-Dauphin-Schuylkill-
1053 AM EDT MON JUN 19 2017
...A STRONG THUNDERSTORM WILL AFFECT SOUTHWESTERN SCHUYLKILL...SOUTH
CENTRAL NORTHUMBERLAND...DAUPHIN...NORTHEASTERN CUMBERLAND...EAST
CENTRAL PERRY AND NORTHWESTERN LEBANON COUNTIES...
At 1053 AM EDT, a strong thunderstorm was located over Marysville,
moving northeast at 45 mph.
Winds in excess of 30 mph and pea size hail are possible with this
storm.
Locations impacted include...
Enola, Camp Hill, Colonial Park, Harrisburg, Linglestown, Progress,
Lemoyne, Lower Allen, New Cumberland, Fredericksburg, Klingerstown,
Trevorton, Paxtang, Rockville, Lickdale, Fort Indiantown Gap, West
Fairview, Pine Grove, Penn National Race Course and Harper Tavern.
LAT...LON 4049 7644 4044 7635 4022 7693 4038 7705
4080 7666 4052 7632
TIME...MOT...LOC 1453Z 232DEG 37KT 4037 7694
GrummSpecial Weather Statement
National Weather Service State College PA
1132 AM EDT MON JUN 19 2017
PAZ037-041-191600-
Northern Lycoming PA-Tioga PA-
1132 AM EDT MON JUN 19 2017
...STRONG THUNDERSTORMS WILL AFFECT PARTS OF NORTHERN LYCOMING AND
TIOGA COUNTIES UNTIL NOON EDT...
At 1132 AM EDT, Doppler radar indicated strong thunderstorms along a
line extending from near Wellsboro to near Blossburg to Buttonwood.
Movement was northeast at 50 mph.
Winds in excess of 40 mph are possible.
Locations impacted include...
Mansfield, Wellsboro, Ralston, Ogdensburg, Millerton, Blossburg,
Arnot, Covington, Buttonwood, Roseville, Liberty and Mansfield
University.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 4181 7690 4160 7688 4159 7681 4157 7681
4138 7722 4161 7712 4174 7732 4200 7693
TIME...MOT...LOC 1532Z 234DEG 43KT 4172 7720 4164 7707 4148 7714
La CorteThe State College radar (KCCX), 112 km away, was scanning. The volume nearest the first event began at 15:40 UTC.
26 thunderstorm wind. Local standard time, as filed.
A severe thunderstorm producing winds estimated near 60 mph knocked down a tree onto wires at Powells Valleys Road and Radel Road east of Halifax.
A severe thunderstorm producing winds estimated near 60 mph knocked down wires in Greencastle.
A severe thunderstorm producing winds estimated near 60 mph knocked down numerous trees across Route 147 between Halfax and Millersburg.
A severe thunderstorm producing winds estimated near 60 mph knocked down a pole and wires across a roadway near Halifax.
A severe thunderstorm producing winds estimated near 60 mph knocked down wires and damaged a transformer near the Bendersville Post Office.
A severe thunderstorm producing winds estimated near 60 mph knocked down nnumerous trees along Pine Grove Furnace Road near Aspers.
A severe thunderstorm producing winds estimated near 60 mph knocked down trees near York Springs.
A severe thunderstorm producing winds estimated near 60 mph knocked down about a dozen trees onto Carlisle Road.
A severe thunderstorm producing winds estimated near 60 mph knocked down trees and wires in Warrington Township.
A severe thunderstorm producing winds estimated near 60 mph knocked down trees along Route 441 near Three Mile Island.
A severe thunderstorm producing winds estimated near 60 mph knocked down trees and wires at the intersection of Sand Hill and Hilltop Roads near Hershey.
A severe thunderstorm producing winds estimated near 60 mph knocked down trees and wires on Route 283 near mile-marker 10.2.
A severe thunderstorm producing winds estimated near 60 mph knocked down trees and wires on Hill Drive near York Haven.
A severe thunderstorm producing winds estimated near 60 mph knocked down trees and wires on High Rock Road north of Hanover.
A severe thunderstorm producing winds estimated near 60 mph knocked down trees in the Village of Pineford.
A severe thunderstorm producing winds estimated near 60 mph knocked down a tree on wires on Fourth Street in Harrisburg.
A severe thunderstorm producing winds estimated near 60 mph knocked down a tree on wires on Wayne Avenue in Middletown.
A severe thunderstorm producing winds estimated near 60 mph knocked down trees and wires south of Hummelstown.
A severe thunderstorm producing winds estimated near 60 mph knocked down trees near Ringtown.
A severe thunderstorm producing winds estimated near 60 mph knocked down trees near Port Carbon.
A severe thunderstorm producing winds estimated near 60 mph knocked down trees on cars near Cleona.
A severe thunderstorm producing winds estimated near 60 mph knocked down trees in Lebanon.
A severe thunderstorm producing winds estimated near 60 mph knocked down a tree on a house in Ephrata.
A severe thunderstorm producing winds estimated near 60 mph knocked down multiple trees along Route 422 between Palmyra and Lebanon.
A severe thunderstorm producing winds estimated near 60 mph knocked down trees and large limbs on Timber and Hillcrest Roads near Mount Gretna.
A severe thunderstorm producing winds estimated near 60 mph knocked down trees and wires at the intersection of Route 241 and Mine Road.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Pennsylvania in 2017Every state in 2017This day in weather historyWarnings in Pennsylvania, June 2017
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 695454, 695455, 695463, 695457, 695459, 695461, 695576, 695569, 695575, 695570, 695467, 695468, 695557, 695566, 695568, 695574, 695466, 695573, 695552, 695555, 695567, 695464, 695548, 695549, 695551, 695554.