A broken line of convection developed along a cold front as it crossed central Pennsylvania during the evening of July 31, 2019. One cell within this line produced win damage in Clearfield County.
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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.
A broken line of convection developed along a cold front as it crossed central Pennsylvania during the evening of July 31, 2019. One cell within this line produced win damage in Clearfield County.
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 Jul 31, 2:47 PM EST, 3 hours 38 minutes earlier.
Area Forecast Discussion National Weather Service State College PA 347 PM EDT Wed Jul 31 2019 .SYNOPSIS... A slow moving upper disturbance will once again trigger scattered showers and thunderstorms today. Slightly drier weather will move in for late week, but it will remain warm and quite summery for the first days of August. && .NEAR TERM /UNTIL 6 AM THURSDAY MORNING/... Radar is becoming active over the southern tier of the CWA in the axis of max MLCAPE that the RAP shows in the range of 1000-1500J. Slow moving thunderstorms have formed over Somerset and Bedford Counties where moisture is pooling in an area of weak low level convergence. The region is under a broad upper jet entrance region and weak upper divergence so we can expect activity to continue to pop for the remainder of the afternoon. My SERN zones are still under a SLIGHT Risk, which is where the most deep layer shear is being analyzed by the RAP. Downdraft CAPEs are not terribly impressive so we will have to see some pretty robust updrafts to consider wind damaging gusts. The latest HRRR still shows mainly scattered and disorganized activity through late day. Any lingering showers this evening should fade with the loss of heating, leading to the second half of the overnight being mainly dry over the region. Patchy fog is again likely tonight, especially over the south and Lower Susq where moisture is deepest. && .SHORT TERM /6 AM THURSDAY MORNING THROUGH 6 PM THURSDAY/... The remains of our slow-moving front will stall just to our south by Thursday, and should maintain at least a slight chc for showers across southern PA. Temperatures look like they should remain seasonable for early August with some drier air advecting in from the north. && .LONG TERM /THURSDAY NIGHT THROUGH WEDNESDAY/... With the mean upper level ridge to the west into next week, there will be a weakness across the east. With no good source of dry air, and a weak cold front just to the south, there will be almost a daily chance of showers and storms, especially across the south. Minor changes to this part of the forecast package. Main thing was to try to cut out blocks of time, where showers and storms will be least likely. Temperatures and dewpoints typical for late July and early August. && .AVIATION /20Z WEDNESDAY THROUGH MONDAY/... AOO is holding onto a MVFR ceiling according to the observation, but otherwise VFR conditions prevail. We will see VFR conditions prevail except under any scattered showers or thunderstorms that are starting to pop with afternoon heating. This activity could produce brief reductions and gusty winds at TAF sites, especially over SRN portions of the flying area. .Outlook... Thu-Sun...Isolated to scattered tstm impacts, mainly south. Mon...No sig wx. && .CTP WATCHES/WARNINGS/ADVISORIES... None. && SYNOPSIS...La Corte NEAR TERM...La Corte SHORT TERM...La Corte LONG TERM...Martin AVIATION...La Corte
Hazardous Weather Outlook National Weather Service State College PA 459 AM EDT Wed Jul 31 2019 PAZ004>006-010>012-017>019-024>028-033>035-037-041-042-045-046-049- 050-010900- 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- 459 AM EDT Wed Jul 31 2019 This Hazardous Weather Outlook is for central Pennsylvania. .DAY ONE...Today and tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. PAZ036-051>053-056>059-063-064-010900- Franklin-Montour-Northumberland-Columbia-Perry-Dauphin-Schuylkill- Lebanon-Cumberland-Adams- 459 AM EDT Wed Jul 31 2019 This Hazardous Weather Outlook is for central Pennsylvania. .DAY ONE...Today and tonight. Strong to severe thunderstorms with gusty winds and small hail are possible this afternoon. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotters are encouraged to report significant hazardous weather. PAZ065-066-010900- York-Lancaster- 459 AM EDT Wed Jul 31 2019 This Hazardous Weather Outlook is for central Pennsylvania. .DAY ONE...Today and tonight. Strong to severe thunderstorms with gusty winds and small hail are possible this afternoon and early evening. Locally heavy rainfall may also occur, leading to isolated instances of flooding. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotters are encouraged to report significant hazardous weather. RXR
The State College radar (KCCX), 13 km away, was scanning. The volume nearest the first event began at 23:23 UTC.
1 thunderstorm wind. Local standard time, as filed.
A severe thunderstorm producing winds estimated near 60 mph knocked down trees and wires in Grassflat.
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, July 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: 844149.