A convergence boundary set up along the Allegheny Front and allowed for scattered showers and isolated thunderstorms to produce locally heavy rainfall in portions of Huntingdon County during the evening hours of September 22, 2025. Nuisance flooding was reported in Huntingdon County where State Route 453 near the intersection of US Route 22 was closed due to flooding.
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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 convergence boundary set up along the Allegheny Front and allowed for scattered showers and isolated thunderstorms to produce locally heavy rainfall in portions of Huntingdon County during the evening hours of September 22, 2025. Nuisance flooding was reported in Huntingdon County where State Route 453 near the intersection of US Route 22 was closed due to flooding.
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 Sep 22, 6:05 PM EST, 2 hours 39 minutes earlier.
Area Forecast Discussion National Weather Service State College PA 705 PM EDT Mon Sep 22 2025 .SYNOPSIS... * Above average temperatures for the last week of September to begin astronomical Fall * Periods of much needed rainfall expected today (western half of PA) through Thursday (expanding across Central and Eastern PA) * Trending drier again for the beginning of October. && .NEAR TERM /UNTIL 6 AM TUESDAY MORNING/... Mid-afternoon satellite imagery shows striking differences from west to east across the state. A shallow deck of stratocumulus are firmly in place across the eastern half of the Commonwealth, characterized by stable conditions and temperatures in the upper 60s to lower 70s. The western half of the state is covered by much more textured clouds and a few towering cumulus, associated with temperatures in the upper 70s to lower 80s and MLCAPE around 1000 J/kg based on the latest SPC Mesoanalysis. A convergence boundary in western PA between stable southeast flow east of the mountains and unstable southwesterly flow west of the mountains has initiated scattered showers extending from Somerset to Bradford early this afternoon. Hi-resolution guidance supports the idea that these storms will fail to maintain themselves with eastward extend as they approach stable/cooler air. Later this afternoon and into the evening, storms currently over the Ohio Valley will lift northeastward into northwest PA. A few storms could produce strong wind gusts where the best combination of instability and shear (~30kts of 0-6km shear) overlap. This region is also located at the SE edge of the DY1 SPC MRGL threat for SVR TSRA. Most locations east of I-99 and south of I-80 should stay rain-free for the remainder of the daylight hours today. High temps during the mid to late afternoon hours will be in the low to mid 70s across the northern and western mtns and upper 70s to low 80s throughout the Central and Southern Valleys. Later tonight, a fairly potent shortwave trough will lift through Central PA (most 850mb cyclonic vorticity model guidance moves this wave through Central PA after midnight). This wave should bring with it more widespread showers, though still primarily located west of I-99 and north of I-80. The severe threat should be lower with the loss of daytime heating. Mostly cloudy skies continue tonight as lows stay quite mild in the upper 50s to mid 60s. Rainfall totals by daybreak may approach an inch in a few spots. && .SHORT TERM /6 AM TUESDAY MORNING THROUGH TUESDAY NIGHT/... A broad mid-level trough will remain over the region on Tuesday and continue our stretch of unsettled weather. Destabilization is likely on Tuesday afternoon in southeast PA where some breaks in the clouds will generate a few hundred J/kg of CAPE. Sufficient (20-30kts) of shear could support a few damaging wind gusts in taller storms. SPC has painted a small Marginal Risk for severe weather that clips the Lower Susquehanna Valley. Highs Tuesday will reach the lower 80s in the southeast, while staying in the upper 60s to lower 70s farther north and west. By Tuesday night, upper level flow becomes more zonal and rain- free conditions will persist. Light winds, ample surface moisture, and some breaks in the clouds will support low clouds/fog across much of the region into Wednesday morning. Another mild night expected with lowers in the upper 50s to mid 60s. && .LONG TERM /WEDNESDAY THROUGH MONDAY/... The long-term period will start out unsettled and then trend quieter by the end of the weekend. On Wednesday, an upper low centered over the Great Lakes will be accompanied by a very positively tilted trough bringing warm/moist southwest flow into the Commonwealth. That broad trough will rotate through Pennsylvania through the end of the week, with multiple shortwaves and associated enhanced rounds of convection along it. Periods of showers and storms are likely Wednesday afternoon through Thursday evening as an approaching surface low moves across the region. Widespread beneficial soaking rainfall of at inch or more seems increasingly probable thanks to the multiple rounds of rainfall expected. After a cold front moves through later this week, wrap-around moisture in northwest flow could lead to continued scattered showers. By the weekend, a potent and quasi- zonal jet core across southern Canada will sag south as a closed upper low across the southern US drifts east. If the low stays south as the most recent model guidance depicts, Pennsylvania will likely remain rain-free for much of the weekend (perhaps dealing with some clouds across southern PA). If the jet core across Canada (and any associated fronts) trends farther south, or if the upper low ends up drifting farther north, unsettled weather could persist through the weekend. && .AVIATION /00Z TUESDAY THROUGH SATURDAY/... First area of convection lifting northeast across the BFD area late this afternoon, will pull a weakening line of showers and storms slowly to the east. Another cluster of showers and storms over central Ohio will move eastward overnight into Tuesday. The airmass more unstable to the west, than across the far east. Thus looking most of not all the showers staying north and west of the MDT and LNS until later on Tuesday. Overall expect some fog to form, along with CIGS lowering overnight. Conditions should improve by late morning or early afternoon on Tuesday. Used VCSH for Tuesday. Not much change with the pattern, weak systems will bring some showers and storms to central PA through Thursday and even some chance on Friday. Conditions trend drier by the weekend. Outlook... Tue-Sat...Multiple rounds of SHRA and PM TSRA (best chances Tue and Thu) with sub-VFR conditions expected. && .CLIMATE... Astronomical fall officially begins with the autumnal equinox on Monday, September 22, 2025 @ 2:19 p.m. EDT. The Autumn 2025 season will last 89 days, 20 hours, and 43 minutes. Daylight saving time will end just after Halloween with clocks falling back at 2 a.m. Sunday, November 2, 2025. && .CTP WATCHES/WARNINGS/ADVISORIES... None. && SYNOPSIS...Banghoff NEAR TERM...Banghoff SHORT TERM...Banghoff LONG TERM...Banghoff AVIATION...Martin CLIMATE...Steinbugl
Hazardous Weather Outlook National Weather Service State College PA 327 PM EDT Mon Sep 22 2025 PAZ005-006-010>012-017>019-024>028-033>037-041-042-045-046-049>053- 056>059-063-231930- 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- 327 PM EDT Mon Sep 22 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...Tuesday through Sunday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. PAZ004-231930- Warren- 327 PM EDT Mon Sep 22 2025 This Hazardous Weather Outlook is for central Pennsylvania. .DAY ONE...This afternoon and tonight. Strong to severe thunderstorms with gusty winds are possible this afternoon and evening. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotters are encouraged to report significant hazardous weather. PAZ064>066-231930- Adams-York-Lancaster- 327 PM EDT Mon Sep 22 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...Tuesday through Sunday. Strong to severe thunderstorms with gusty winds are possible Tuesday afternoon and evening. .SPOTTER INFORMATION STATEMENT... Spotters are encouraged to report significant hazardous weather.
The national radar mosaic for the moment the first event began.
1 flood. Local standard time, as filed.
Report of minor road flooding on PA Route 453 north of the intersection with US Route 22 near Water Street.
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, September 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: 1289343.