A triple point set up across central Pennsylvania and continued moving southeast during the evening hours of April 5, 2025 with elevated instability, ample shear, moisture, and lift in place across the southern tier of Pennsylvania. As showers and thunderstorms moved into the southern half of Pennsylvania, decreasing instability as sunset occurred led to strong thunderstorms beginning to weaken,…
Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. 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.
A triple point set up across central Pennsylvania and continued moving southeast during the evening hours of April 5, 2025 with elevated instability, ample shear, moisture, and lift in place across the southern tier of Pennsylvania. As showers and thunderstorms moved into the southern half of Pennsylvania, decreasing instability as sunset occurred led to strong thunderstorms beginning to weaken, with one instance of tree damage in Adams County as a tree fell onto Baltimore Pike.
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 Apr 1, 8:08 PM EST, 1 hour 2 minutes earlier.
Area Forecast Discussion National Weather Service State College PA 908 PM EDT Tue Apr 1 2025 .SYNOPSIS... Low pressure will track west of Pennsylvania through the Great Lakes Wednesday night into Thursday. The trailing cold front will push through Central Pennsylvania late Thursday, then stall out out of just south of the region late this week. A wave on the stalled front is likely to lift up the Ohio Valley and across Pennsylvania next weekend. && .NEAR TERM /THROUGH WEDNESDAY/... High pressure nosing south from S Ontario/Quebec will provide Central PA with fair and chilly weather tonight, along with light winds. Evening satellite imagery shows high clouds associated with an approaching warm front over the Midwest beginning to stream into Western PA. Latest HREF cloud progs indicate the cirrus will be fairly thin for much of the night, then thicken up around daybreak. Mostly clear skies for a portion of the night, combined with light wind and dry air, should support efficient radiational cooling and min temps a bit below NBM guidance, especially over the eastern counties. Isentropic lift at the nose of a strong southerly low level jet lifting into the Grt Lks will likely produce a round of showers across much of Central PA Wed afternoon/early evening. The strongest forcing and highest POPs of around 90 pct are across the NW Mtns, while the Lower Susq Valley stands the least chance of measurable rain. Latest CAMS indicate the most likely timeframe for showers will range from mid afternoon over the NW Mtns, to early evening over the eastern edge of the forecast area. Mostly cloudy skies and a southeast flow off of the chilly Atlantic Ocean should result in max temps Wed a bit below normal for early April. && .SHORT TERM /WEDNESDAY NIGHT/... The showers should lift north of the PA/NY border by late Wed evening with the retreating 8H baroclinic zone. Focus then shifts to an upstream cold front and associated line of convection, which should push into at least the northwest part of the forecast area by dawn Thursday. Current progs indicate minimal surface based instability, but 70kt winds at 850mb supports a MRGL risk of damaging wind gusts toward dawn over the Allegheny Plateau. && .LONG TERM /THURSDAY THROUGH TUESDAY/... The overall pattern for the long term period looks messy and wet, to say the least. Multiple shortwaves and small disturbances will bring rounds of rain showers through the long term period. Deep troughing over the Great Lakes heading into early next week will bring colder than average temperatures across the region. If guidance maintains this current temperature trend, precipitation in the northern portion of Central PA may be in the form of snowfall, or mostly snowfall/wet snowfall. && .AVIATION /01Z WEDNESDAY THROUGH SUNDAY/... All model guidance continues to indicate VFR conditions with clear skies for a majority of the overnight period (through 10Z Wednesday) with the bulk of model guidance leading to high (~80-90%) confidence in VFR conditions remaining through 18Z Wednesday. Recent model guidance brings a line of showers towards BFD in the 18-20Z timeframe, overspreading eastward through 00Z Thursday, with some potential for TSRA across W PA. At this time, mentions of TSRA are out of the 00Z TAF package as elevated instability is not the most impressive; however cannot rule out some thunder across BFD/JST/AOO. Ceilings are expected (~80-90%) to prevail MVFR at BFD/JST with some signals in RAP model guidance for IFR ceilings at onset at BFD. IFR conditions at BFD seem to be a less likely scenario (~30% probability), thus have kept any mentions with a PROB30 group. Further SE (LNS/MDT), lower confidence on SHRA impacting the airfields based on drier low-levels, thus have kept mentions out of the 00Z TAF package at this time. Outlook... Thu...MVFR poss in widespread rain showers. TSRA poss, mainly S. CFROPA aftn/eve. Fri...MVFR cigs and visby expected, mainly S. Sat...Widespread showers; impacts likely. Sun...Widespread showers; impacts likely. && .CLIMATE... Closing out very mild March 2025. Below are the rankings and departures from the historical average through 3/30: Site Avg. March temp Rank Harrisburg 46.5F (+4.9F) 12th warmest Williamsport 44.8F (+6.2F) 9th warmest Altoona 44.4F (+5.9F) 7th warmest Bradford 40.2F (+7.3F) T3rd warmest State College COOP site STCP1 recorded the 10th warmest March on record with an average monthly temperature of 43.3F. && .CTP WATCHES/WARNINGS/ADVISORIES... None. && SYNOPSIS...Fitzgerald NEAR TERM...Fitzgerald SHORT TERM...Fitzgerald LONG TERM...Lardeo AVIATION...NPB CLIMATE...Steinbugl
Hazardous Weather Outlook National Weather Service State College PA Issued by National Weather Service Binghamton NY 309 PM EDT Tue Apr 1 2025 PAZ005-006-010>012-017>019-024>028-033>037-041-042-045-046-049>053- 056>059-063>066-021915- McKean-Potter-Elk-Cameron-Northern Clinton-Clearfield- Northern Centre-Southern Centre-Cambria-Blair-Huntingdon-Mifflin- Juniata-Somerset-Bedford-Fulton-Franklin-Tioga-Northern Lycoming- Sullivan-Southern Clinton-Southern Lycoming-Union-Snyder-Montour- Northumberland-Columbia-Perry-Dauphin-Schuylkill-Lebanon-Cumberland- Adams-York-Lancaster- 309 PM EDT Tue Apr 1 2025 This Hazardous Weather Outlook is for central Pennsylvania. .DAY ONE...This afternoon and tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. PAZ004-021915- Warren- 309 PM EDT Tue Apr 1 2025 This Hazardous Weather Outlook is for central Pennsylvania. .DAY ONE...This afternoon and tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Strong to severe thunderstorms with gusty winds are possible early Thursday morning. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
The national radar mosaic for the moment the first event began.
1 strong wind. Local standard time, as filed.
A strong thunderstorm, producing estimated wind gusts near 50 mph, knocked a tree across the roadway on Baltimore Pike, closing it for a brief period of time.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Pennsylvania in 2025Every state in 2025This day in weather historyWarnings in Pennsylvania, April 2025
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: 1252489.