A slow-moving frontal boundary dropped south from the Great Lakes during the first two days of June. On the 1st, storms were able to fire ahead of the boundary over Lake Erie, forming into a line and dropping across western Pennsylvania during the afternoon and evening.
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 PBZ wrote it up.
A slow-moving frontal boundary dropped south from the Great Lakes during the first two days of June. On the 1st, storms were able to fire ahead of the boundary over Lake Erie, forming into a line and dropping across western Pennsylvania during the afternoon and evening. The storms were able to take advantage of an environment characterized by surface-based CAPE in excess of 2000 J/kg and steep low-level lapse rates to produce several reports of damaging wind gusts, most near and north of Interstate 80.
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 Pittsburgh, PA wrote its last area forecast discussion before the first event at Jun 1, 1:56 PM EST, 1 hour 39 minutes earlier.
Area Forecast Discussion National Weather Service Pittsburgh PA 256 PM EDT Sat Jun 1 2019 .SYNOPSIS... Shower and thunderstorm chances will increase overnight into Sunday with a crossing front. Dry conditions return early next week with much cooler temperature. && .NEAR TERM /THROUGH TONIGHT/... Showers and thunderstorms around Lake Erie will move around a 700mb ridge over the Ohio River Valley and towards the Poconos this evening. Enough forcing/lift from the storm outflows will help push convection towards the I-80 corridor this evening, but increasingly stable air plus the weak ridge will limit the southern extent. This region could produce a few strong to severe storms if they develop, given MUCAPE and increasing sfc/mid-level lapse rates. The primary threat would be strong winds given dry air aloft, but the lack of stronger shear and decreasing instability going into the overnight period will limit the severe threat. Overnight convection for the area will be predicated on a second storm complex persisting from the lower MI region. However, it is unlikely that this will occur given that there will not be enough elevated instability and/or strong enough shear for it to overcome the sfc stable layer and/or keep pace with its cold pool outflow. Better chances will occur along the cold frontal boundary that arrives Sunday morning. && .SHORT TERM /SUNDAY THROUGH TUESDAY NIGHT/... An upper level low pressure system will swing through the Great Lakes Sunday, pushing through a sfc cold front during the morning and afternoon hours. A broken line of showers and thunderstorms are expected ahead of this front, with dry air rapidly filling in behind the front to end showers. Colder northwest flow after the trough passage will lead to drier weather and below normal temperature from Sunday evening through Tuesday. A turbulent boundary layer will help mitigate some cooling Sunday night into Monday, but that won't be the case Monday night into Tuesday due to increasing sfc high pressure. Combined with clearer skies and dewpoints dropping to the low 30s, there is potential for near freezing temperatures to develop in valley areas across the eastern ridges. Widespread frost is not expected to develop, but cold prone valleys may want to monitor forecast trends. && .LONG TERM /WEDNESDAY THROUGH SATURDAY/... An unsettled weather pattern will return by mid-week that will result in near normal temperature plus periods of showers and thunderstorms. && .AVIATION /18Z SATURDAY THROUGH THURSDAY/... VFR conditions were forecast for the majority of the TAF period. Best chance of seeing any afternoon and evening showers and storms will lie near and north of I-80, where pre-frontal lift could be sufficient to fire off convection, but low confidence led to the use of vicinity wording. Precipitation will mostly wait until after 09Z or so on Sunday as a cold front approaches and crosses. Again, low confidence on timing and chances led to use of VCTS/VCSH. MVFR ceilings may accompany the boundary. Overnight mixing should prevent a repeat of fog development. .Outlook... Any restrictions will depart Sunday afternoon as high pres builds. The next chance will come with a developing Great Lakes low pressure midweek. && .PBZ WATCHES/WARNINGS/ADVISORIES... MD...None. OH...None. PA...None. WV...None. &&
Hazardous Weather Outlook National Weather Service Pittsburgh PA 338 AM EDT Sat Jun 1 2019 MDZ001-OHZ039>041-048>050-057>059-068-069-PAZ007>009-013>016-020>023- 029-031-073>076-WVZ001>004-012-021-509>514-020745- Garrett-Tuscarawas-Carroll-Columbiana-Coshocton-Harrison- Jefferson OH-Muskingum-Guernsey-Belmont-Noble-Monroe-Mercer-Venango- Forest-Lawrence-Butler-Clarion-Jefferson PA-Beaver-Allegheny- Armstrong-Indiana-Washington-Greene-Westmoreland-Westmoreland Ridges- Fayette-Fayette Ridges-Hancock-Brooke-Ohio-Marshall-Wetzel-Marion- Monongalia-Ridges of Eastern Monongalia and Northwestern Preston- Preston-Eastern Preston-Western Tucker-Eastern Tucker- 338 AM EDT Sat Jun 1 2019 This Hazardous Weather Outlook is for western Maryland, east central Ohio, northwest Pennsylvania, southwest Pennsylvania, west central Pennsylvania, western Pennsylvania, northern West Virginia and northern panhandle of West Virginia. .DAY ONE...Today and tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Sunday through Friday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
Special Weather Statement
National Weather Service Pittsburgh PA
355 PM EDT Sat Jun 1 2019
PAZ007-008-012030-
Venango-Mercer-
355 PM EDT Sat Jun 1 2019
...AN AREA OF STRONG THUNDERSTORMS CAPABLE OF PRODUCING SMALL HAIL
AND GUSTY WIND WILL AFFECT NORTHEASTERN MERCER AND NORTHWESTERN
VENANGO COUNTIES...
At 355 PM EDT, strong thunderstorms were clustered near Guys Mills,
or 10 miles southeast of Meadville, moving east at 20 mph.
Wind gusts up to 45 mph and small hail are possible with this storm.
Locations impacted include...
Franklin... Sugarcreek...
Cooperstown... Utica...
Oil Creek State Park...
This includes Interstate 79 in Pennsylvania near mile marker 137.
This storm may intensify, so monitor local radio or television
stations for additional information and possible warnings from the
National Weather Service.
LAT...LON 4138 7983 4147 8020 4148 8019 4149 8000
4150 7998 4151 7998 4151 7996 4152 7996
4153 7994 4154 7994 4154 7993 4156 7991
4156 7989 4157 7989 4157 7987 4158 7987
4160 7983 4162 7983 4162 7959
TIME...MOT...LOC 1955Z 289DEG 18KT 4156 7998Special Weather Statement
National Weather Service Pittsburgh PA
426 PM EDT Sat Jun 1 2019
PAZ008-009-012100-
Forest-Venango-
426 PM EDT Sat Jun 1 2019
...AN AREA OF STRONG THUNDERSTORMS CAPABLE OF PRODUCING HAIL AND
GUSTY WIND WILL AFFECT NORTHEASTERN VENANGO AND NORTHERN FOREST
COUNTIES...
At 425 PM EDT, strong thunderstorms were clustered 10 miles south of
Chapman State Park, or 12 miles northwest of Marienville, moving east
at 30 mph.
Wind gusts up to 45 mph and hail up to the size of nickels are
possible with this storm.
Locations impacted include...
Marienville... Kellettville...
West Hickory... East Hickory...
Starr...
LAT...LON 4144 7896 4144 7897 4145 7898 4145 7906
4142 7907 4142 7909 4143 7910 4161 7954
4163 7951 4163 7896
TIME...MOT...LOC 2025Z 282DEG 25KT 4162 7926Special Weather Statement
National Weather Service Pittsburgh PA
433 PM EDT Sat Jun 1 2019
PAZ007-012100-
Mercer-
433 PM EDT Sat Jun 1 2019
...AN AREA OF STRONG THUNDERSTORMS CAPABLE OF PRODUCING HAIL AND
GUSTY WIND WILL AFFECT NORTHERN MERCER COUNTY...
At 433 PM EDT, strong thunderstorms were clustered near Kinsman, or
14 miles north of Sharpsville, moving east at 25 mph.
Wind gusts up to 45 mph and hail up to the size of nickels are
possible with this storm.
Locations impacted include...
Greenville... Jamestown...
New Lebanon... Sheakleyville...
Maurice K Goddard State Park...
This includes Interstate 79 in Pennsylvania between mile markers 132
and 137.
LAT...LON 4149 8028 4148 8013 4149 8012 4149 8002
4138 8002 4142 8052 4149 8052
TIME...MOT...LOC 2033Z 272DEG 20KT 4147 8048The State College radar (KCCX), 123 km away, was scanning. The volume nearest the first event began at 20:37 UTC.
7 thunderstorm wind, 1 hail. Local standard time, as filed.
County 911 officials reported that trees were blown down at Minister Creek Campground.
Trees were blown down along State Route 666, according to county 911 officials.
County 911 officials reported that trees were blown down.
Trees and wires were blown down in Lake Township, according to county 911 officials.
Trees were blown down in the Sandy Lake/Stoneboro area, according to 911 representatives.
County 911 officials reported that trees were blown down.
County 911 officials reported that trees were blown down along Cannelton Road between Watts Mill and the Ohio state line. The road was closed for a time.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Pennsylvania in 2019Every state in 2019This day in weather historyWarnings in Pennsylvania, June 2019
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: 829734, 829735, 829737, 829739, 829741, 829743, 829745, 829750.