Hot and humid conditions under the influence of a lee-side trough allowed for scattered thunderstorm development during the afternoon and evening hours of June 26, 2025. 00 range), coupled with overly favorable instability (CAPE in the 2000-3000 J/kg range) allowed for pulse thunderstorms to push up towards severe limits and trend downward without sufficient shear in place across central…
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.
Hot and humid conditions under the influence of a lee-side trough allowed for scattered thunderstorm development during the afternoon and evening hours of June 26, 2025. Ample moisture in place across the region (PWATs in 1.75 to 2.00 range), coupled with overly favorable instability (CAPE in the 2000-3000 J/kg range) allowed for pulse thunderstorms to push up towards severe limits and trend downward without sufficient shear in place across central Pennsylvania. Severe thunderstorms across south-central and southeastern Pennsylvania produced scattered instances of tree damage. This lack of shear also allowed for thunderstorms, producing efficient rainfall rates exceeding one inch per hour, to stall out and/or move slowly, prompting isolated instances of flash flooding across Lycoming 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 Jun 26, 2:13 PM EST, 41 minutes earlier.
Area Forecast Discussion National Weather Service State College PA 313 PM EDT Thu Jun 26 2025 .SYNOPSIS... * Flash flood and severe t-storm risk increased this afternoon and evening over east central PA * Breaking heat gives way to drenching downpours into the last weekend of June; unsettled pattern continues to start July && .NEAR TERM /UNTIL 6 AM FRIDAY MORNING/... Severe T-storm watch #464 issued for a portion of south central PA until 10PM EDT. From MCD #1455: Thunderstorm activity has begun to initiate across portions of the Appalachians. This activity is expected to continue to expand in coverage through the afternoon/evening. The environment to the east is hot and unstable (with MLCAPE around 1000-2000 J/kg) and temperatures in the upper 80s to 90s. Despite the weak flow aloft and weak shear, steep low-level lapse rates (around 7.5-8 C/km) and moist profiles will support potential for wet downbursts and damaging outflow winds. This area will be monitored for watch potential through the afternoon. Several changes/updates in the near term: 1. [Flash] flood watch over east central PA: 3pm to midnight Signals from the 00 and 12Z HREF continue to favor slow moving storms along lee-side trough and backdoor frontal zone. Both HREF and RRFS show pockets of elevated probabilities of >2"/hr rainfall rates by mid-late afternoon into the evening. Despite the lack of synoptic/kinematic support, the favorable thermodynamic profile (1.75-2.00" PWs and max CAPEs 2000-3000 J/Kg) combined with the likelihood of slow cell motions with the potential for repetitive convection along the aforementioned boundaries are key drivers of the watch with point rain amounts 2-4" possible over a short duration. No change to the D1 SLGT risk ERO from WPC. 2. SPC convective outlook upgrade from risk level 1 to 2 (SLGT) Full sunshine this morning across south central into southeast PA allowing temps to rise into the mid 80s to low 90s. While not as extreme, hot/humid conditions will lead to scattered thunderstorm development through the evening. Winds aloft are weak, suggesting disorganized/pulse convective modes. However, steep low-level lapse rates and moderate CAPE values will once again result in a risk of locally damaging wind gusts. Heat Advisory remains in effect until 7 PM EDT. Showers will gradually fade into late tonight. There appears to be an emerging signal for fog and low clouds overnight into early Friday morning particularly across the eastern half of the CWA with plenty of residual moisture and low level easterly flow. && .SHORT TERM /6 AM FRIDAY MORNING THROUGH SUNDAY/... Low clouds are likely to persist through the first part of Friday thanks to an east to southeast low level flow. Any convection would be mainly confinded to along and west of the Allegheny Mtns. Max temps will be 10 to 20 degrees cooler vs. Thursday with the largest 24hr delta over the middle to lower Susq Valley. The fairly robust easterly flow signal may offer some downside risk to max T particularly over the eastern portion of the forecast area. Highs will generally range from around 70F in the Endless Mtns and northeast Coal Region to the 80-85F range along the western periphery of the CWA. Unsettled pattern continues through the last weekend/end of June with daily opportunities for drenching downpours. After a brief cool down on Friday, seasonably hot/humid summertime conditions return from Saturday into Monday. && .LONG TERM /SUNDAY NIGHT THROUGH THURSDAY/... The anomalous upper-level ridge that brought heat to much of the eastern United States will continue to gradually be suppressed to the south in the extended period, and long range models suggest that it should be replaced by an upper level trough over the northeastern United States by the middle of next week. As for sensible weather...the unsettled pattern will persist into at least the first half of the upcoming weekend, with SHRA/TSRA likely on Saturday, especially in the afternoon and evening. Sunday looks like the better day of the weekend, with a small area of high pressure building in, and keeping PoPs less than 40 percent. An approaching cold front and upper trough will bring more widespread SHRA/TSRA later Monday into Tuesday. After that, we could be in for a welcome shot of cooler and drier weather for the middle to later part of next week. && .AVIATION /19Z THURSDAY THROUGH TUESDAY/... Scattered thunderstorms may produce short term restrictions this afternoon and evening; accounted for this risk via PROB30s. There is an emerging signal for more prolonged MVFR to IFR cigs later tonight into Friday particularly across the eastern 3/4 of the airspace due to a developing east to southeast low level flow. Confidence in sub-VFR across ZNY sector is very high >80% into Friday morning. Outlook... Fri...IFR/MVFR cigs trending toward MVFR/VFR by the afternoon. Additional showers possible. Sat-Mon...Periods of showers and t-storms with times of fog and low clouds overnight. && .CTP WATCHES/WARNINGS/ADVISORIES... Flood Watch until midnight EDT tonight for PAZ028-037-041-042- 046-049>053-056>059-063>066. Heat Advisory until 7 PM EDT this evening for PAZ034>036- 063>065. && SYNOPSIS...Steinbugl NEAR TERM...Steinbugl SHORT TERM...Steinbugl LONG TERM...Colbert AVIATION...Steinbugl
Hazardous Weather Outlook National Weather Service State College PA 226 PM EDT Thu Jun 26 2025 PAZ037-041-042-046-271830- Tioga-Northern Lycoming-Sullivan-Southern Lycoming- 226 PM EDT Thu Jun 26 2025 ...FLOOD WATCH IN EFFECT UNTIL MIDNIGHT EDT TONIGHT... 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. Flood Watch. Strong to severe thunderstorms may produce wind damage this afternoon into the evening. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotters are encouraged to report significant hazardous weather. PAZ063>065-271830- Cumberland-Adams-York- 226 PM EDT Thu Jun 26 2025 ...HEAT ADVISORY REMAINS IN EFFECT FROM 9 AM THIS MORNING TO 7 PM EDT THIS EVENING... ...SEVERE THUNDERSTORM WATCH 464 IN EFFECT UNTIL 10 PM EDT THIS EVENING... ...FLOOD WATCH IN EFFECT UNTIL MIDNIGHT EDT TONIGHT... 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. Heat Advisory. Severe Thunderstorm Watch. Flood Watch. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotters are encouraged to report significant hazardous weather. PAZ028-049>053-056>059-066-271830- Juniata-Union-Snyder-Montour-Northumberland-Columbia-Perry-Dauphin- Schuylkill-Lebanon-Lancaster- 226 PM EDT Thu Jun 26 2025 ...SEVERE THUNDERSTORM WATCH 464 IN EFFECT UNTIL 10 PM EDT THIS EVENING... ...FLOOD WATCH IN EFFECT UNTIL MIDNIGHT EDT TONIGHT... 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. Flood Watch. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotters are encouraged to report significant hazardous weather. PAZ004>006-010>012-017>019-024-025-033-045-271830- Warren-McKean-Potter-Elk-Cameron-Northern Clinton-Clearfield- Northern Centre-Southern Centre-Cambria-Blair-Somerset- Southern Clinton- 226 PM EDT Thu Jun 26 2025 This Hazardous Weather Outlook is for central Pennsylvania. .DAY ONE...This afternoon and tonight. A few strong thunderstorms may produce gusty winds and locally heavy rainfall this afternoon through the evening. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotters are encouraged to report significant hazardous weather. PAZ026-027-271830- Huntingdon-Mifflin- 226 PM EDT Thu Jun 26 2025 ...SEVERE THUNDERSTORM WATCH 464 IN EFFECT UNTIL 10 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...Friday through Wednesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotters are encouraged to report significant hazardous weather. PAZ035-036-271830- Fulton-Franklin- 226 PM EDT Thu Jun 26 2025 ...HEAT ADVISORY REMAINS IN EFFECT FROM 9 AM THIS MORNING TO 7 PM EDT THIS EVENING... ...SEVERE THUNDERSTORM WATCH 464 IN EFFECT UNTIL 10 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. Heat Advisory. Severe Thunderstorm Watch. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotters are encouraged to report significant hazardous weather. PAZ034-271830- Bedford- 226 PM EDT Thu Jun 26 2025 ...HEAT ADVISORY REMAINS IN EFFECT FROM 9 AM THIS MORNING TO 7 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. Heat Advisory. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotters are encouraged to report significant hazardous weather.
The State College radar (KCCX), 100 km away, was scanning. The volume nearest the first event began at 19:54 UTC.
11 thunderstorm wind, 1 flash flood. Local standard time, as filed.
A line of severe thunderstorms producing wind gusts estimated at 60 mph knocked a tree down along the 6500 block of PA-147 which blocked a lane of traffic.
A severe thunderstorm producing wind gusts estimated at 60 mph knocked trees and wires down onto Packing House Road near Pigeon Hill Road approximately 3 miles west-southwest of Spring Grove.
A line of severe thunderstorms producing wind gusts estimated at 60 mph knocked multiple trees and wires down throughout the city of Lancaster.
A line of severe thunderstorms producing wind gusts estimated at 60 mph knocked trees down onto wires on Pennsy Road approximately 2 miles west-southwest of Smithville.
A line of severe thunderstorms producing wind gusts estimated at 60 mph knocked power lines down in Smithville.
Heavy rain resulted in flash flooding and water covering Route 118 in Lairdsville.
A severe thunderstorm producing wind gusts estimated at 60 mph knocked trees and wires down onto Point Road approximately 1 mile north-northeast of Raystown Dam.
A severe thunderstorm producing wind gusts estimated at 60 mph knocked a tree down onto South Jefferson Street in Mount Union which blocked the roadway.
A severe thunderstorm producing wind gusts estimated at 60 mph knocked trees down onto wires approximately 5 miles south-southeast of Three Springs.
A severe thunderstorm producing wind gusts estimated at 60 mph knocked multiple trees down in the area of N Clear Ridge Road in Dublin Township.
A severe thunderstorm producing wind gusts estimated at 60 mph knocked trees down onto wires along Meadow Ground Road approximately 2 miles west-southwest of McConnellsburg.
A severe thunderstorm producing wind gusts estimated at 60 mph knocked trees down onto wires along Meadow Mountain Drive approximately 3 miles southwest of McConnellsburg.
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, June 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: 1263229, 1263231, 1263225, 1263226, 1263227, 1266686, 1263221, 1263223, 1263224, 1263216, 1263217, 1263218.