25 across the Lower Susquehanna Valley) and unstable environment allowed for multiple clusters of thunderstorms to begin to form during the late morning hours and continue through the late evening hours of June 30, 2025. A shortwave trough stationed across the region allowed for enhanced lift, with relatively weak shear in place, bringing a severe threat in the form of wet downbursts and a flash…
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.
A slow-moving warm front in an extremely moist (PWAT values exceeding 2.00, values closer to 2.25 across the Lower Susquehanna Valley) and unstable environment allowed for multiple clusters of thunderstorms to begin to form during the late morning hours and continue through the late evening hours of June 30, 2025. A shortwave trough stationed across the region allowed for enhanced lift, with relatively weak shear in place, bringing a severe threat in the form of wet downbursts and a flash flood threat given training thunderstorms with efficient rainfall rates in excess of two inches per hour across southern Pennsylvania. Isolated thunderstorm wind damage was observed across Tioga County, with tree damage observed in Lancaster County and a widespread area of trees and wires knocked down in Cumberland County due to a wet microburst. Multiple rounds of thunderstorms during the afternoon and evening hours across Lancaster County, where multiple days of heavy rainfall led to low flash flood guidance, prompted widespread flash flooding across the northern half of the county, with multiple water rescues reported in Mount Joy and Manheim. Multiple roadways were closed across northern Lancaster County and southern Lebanon County due to heavy rain, with isolated instances of flash flooding in Cumberland County. Flooding concerns in Lancaster County continued into the early morning hours of July 1, 2025 as the heaviest rain began to move out of the area.
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 30, 1:02 PM EST, 1 hour 10 minutes earlier.
Area Forecast Discussion National Weather Service State College PA 202 PM EDT Mon Jun 30 2025 .SYNOPSIS... * Stormy pattern resumes for this afternoon and again for tomorrow as a warm front (today), then cold front (tomorrow) pushes through the region, bringing a renewed risk of strong to severe storms and locally heavy downpours * Drier/less humid/more comfortable conditions are likely from mid to late week with high confidence of nice weather on Independence Day && .NEAR TERM /UNTIL 11 PM THIS EVENING/... Healthy moisture return will occur through this afternoon with PWAT values climbing by another 3-4 tenths between 17-23Z today, peaking from about 1.8 inches across the NE Mtn zones to around 2.25 inches across the Lower Susq Valley. Lowest FFG values and highest concentration of 3 hour QPF Ens Probability matched mean values over 1.5 inches gave us the backing to collaborate/issue a Flash Flood Watch for our NW Mtns and Laurel Highlands through 10 pm this evening. Heavy showers and TSRA forming near and to the south of a slow moving warm front will have the potential to train NE across the same locations and bring the risk of Flash Flooding. Pertinent and still valid parts of the previous discussion follow - The NE surge of deep-layer moisture will occur downstream of an amplifying mid-upper trough moving into the Upper Midwest and western Great Lakes. Numerous showers and thunderstorms are expected beginning early this afternoon and lasting through this evening as shortwave energy supplies large scale forcing for ascent. Given the presence of weak/modest vertical wind shear, a few of the storms could become strong to locally severe. Strong boundary-layer heating is expected with 2000+ J/kg of tall/thin SBCAPE) amid relatively weak effective shear values of 25-30 knots. This environment will support the potential for wet downbursts and damaging wind gusts. Max temps will range from the low-mid 80s across the high terrain of the north and west, to the upper 80s in the central and southern valleys. Storms will continue into this evening with cold pools taking over and bringing an end to the widespread shower activity after dark. && .SHORT TERM /11 PM THIS EVENING THROUGH TUESDAY NIGHT/... Given the refuel of surface water from Monday's rain and sultry conditions tonight, expect fog tonight into Tuesday morning, especially where low clouds can break. It will be quite warm and muggy tonight with temps slowly slipping through the 70s before reaching a low in the mid to upper 60s across the northern and western mtns and 70-75 in the central and southern valleys. The aforementioned mid-level trough will shift east from the Great Lakes to the Northeast on Tuesday. Moderate mid-level flow will overspread much of the region, including placing central PA in the right entrance region of an upper-level jet. At the surface, a cool front will move east across PA and will be the primary focus for severe thunderstorm potential Tuesday afternoon/evening. Stronger shear profiles will be present on Tuesday and this may result in greater storm organization/intensity including the potential for a few supercells capable of producing large hail and damaging wind gusts. Storms should eventually congeal into a more solid line as the front makes closer approach, maintaining a damaging wind threat into the Lower Susquehanna Valley. Drier air will begin advecting into central PA late Tuesday into Tuesday night with dewpoints dropping well into the 60s. && .LONG TERM /WEDNESDAY THROUGH SUNDAY/... In the wake of the cold front passing east of the area by Wednesday morning, high pressure begins to build southwest of the region, providing fair weather for the middle of the week and into the weekend. Best chances for precipitation through Saturday will remain due to a cold frontal passage across the northern half of Pennsylvania. Cold front remains relatively moisture-starved; however, generally think forcing will be enough to cause a shower and afternoon/evening thunderstorm. Low pressure approaching the Great Lakes by Sunday morning will bring about increasing chances for precipitation for the second half of the weekend and into the beginning of next week. && .AVIATION /18Z MONDAY THROUGH SATURDAY/... High res ensemble guidance and individual CAM members show convective showers and TSRA steadily expanding in coverage from SW to NE across Central PA and the Susq Valley during the mid afternoon through early evening hours. The bulk of the time (95+% of the TAF period) will stay VFR, but brief periods of MVFR are likely with heavy showers or TSRA at most airfields between 20Z today and 00-01Z Tuesday Predominantly VFR conds are expected to continue overnight, although there is low confidence that some spots could see the development of fog/low clouds during the predawn hours. High and mid level clouds may help to limit fog development. Outlook... Tue...PM showers & t-storms likely; areas of fog & low clouds as well. Wed...AM fog, then VFR. Thu...Primarily VFR; stray PM shower/t-storm possible. Fri...AM fog possible; otherwise VFR. && .CTP WATCHES/WARNINGS/ADVISORIES... Flood Watch until 10 PM EDT this evening for PAZ004-005-010- 017-024-033. && SYNOPSIS...Guseman/Lambert NEAR TERM...Guseman/Lambert SHORT TERM...Guseman/Steinbugl LONG TERM...Evanego/NPB AVIATION...Lambert/Martin
Hazardous Weather Outlook National Weather Service State College PA 1216 PM EDT Mon Jun 30 2025 PAZ006-011-012-018-019-025>028-034>037-041-042-045-046-049>053- 056>059-063>066-011630- Potter-Cameron-Northern Clinton-Northern Centre-Southern Centre- Blair-Huntingdon-Mifflin-Juniata-Bedford-Fulton-Franklin-Tioga- Northern Lycoming-Sullivan-Southern Clinton-Southern Lycoming-Union- Snyder-Montour-Northumberland-Columbia-Perry-Dauphin-Schuylkill- Lebanon-Cumberland-Adams-York-Lancaster- 1216 PM EDT Mon Jun 30 2025 This Hazardous Weather Outlook is for central Pennsylvania. .DAY ONE...This afternoon and tonight. Strong to severe thunderstorms capable of producing localized damaging winds and heavy rainfall are possible this afternoon and evening. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Strong to severe thunderstorms capable of producing damaging winds and heavy rainfall are possible during the afternoon and evening on Tuesday, especially across the Lower Susquehanna Valley. .SPOTTER INFORMATION STATEMENT... Spotters are encouraged to report significant hazardous weather. PAZ004-005-010-017-024-033-011630- Warren-McKean-Elk-Clearfield-Cambria-Somerset- 1216 PM EDT Mon Jun 30 2025 ...FLOOD WATCH 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. Flood Watch. Strong to severe thunderstorms capable of producing localized damaging wind gusts and heavy rainfall are possible this afternoon and evening. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Strong to severe thunderstorms capable of producing damaging winds and heavy rainfall are possible during the afternoon and evening on Tuesday, especially across the Lower Susquehanna Valley. .SPOTTER INFORMATION STATEMENT... Spotters are encouraged to report significant hazardous weather.
The State College radar (KCCX), 153 km away, was scanning. The volume nearest the first event began at 19:12 UTC.
9 thunderstorm wind, 9 flash flood, 2 flood, 1 hail. Local standard time, as filed.
A severe thunderstorm producing wind gusts estimated at 60 mph knocked multiple trees down in Pottsville. One tree fell onto a car on Fairmount Avenue. No injuries were reported.
A severe thunderstorm, producing winds estimated near 60 mph, knocked down multiple trees down onto Weigand Boulevard in Port Carbon.
A severe thunderstorm producing wind gusts estimated at 60 mph knocked trees down near Orwigsburg.
Ponding of water closed one lane of Route 61 near the intersection with Tunnel Road near the Fairlane Village Mall north of Pottsville.
A severe thunderstorm producing wind gusts estimated at 70 mph knocked multiple trees and power lines down throughout Carlisle.
A severe thunderstorm producing wind gusts estimated at 70 mph knocked a tree onto a house on Courtyard Drive north of Carlisle.
Flash flooding and vehicles stranded in water reported in Carlisle.
A strong thunderstorm produced penny-sized hail near Highville.
A severe thunderstorm producing wind gusts estimated at 60 mph knocked a tree down which blocked Charleston Road near the intersection with Caitlin Hollow Road approximately 3 miles east-northeast of Wellsboro.
Flash flooding and a stranded vehicle were reported on East Penn Street in Carlisle.
Flash flooding caused a creek to overflow it's banks and flood Echo Valley Road near Mount Joy.
Standing water was reported to be over the roadway at Cherry Drive and Rosedale in Hershey.
Flash flooding was reported in Palmyra with water across a roadway.
Flash flooding covered the roadway with water at Split Rail Drive and Meadow Lark Lane in East Petersburg.
Flash flooding led to high water on and a water rescue at Manheim Pike and Steel Way in Lancaster.
Flash flooding led to road closures in and around Palmyra.
Flash flood caused water from the Little Conestoga Creek to flow across Harrisburg Pike near Long's Park.
A severe thunderstorm producing wind gusts estimated at 60 mph knocked a tree onto wires at the intersection of McFarland Drive and Penningdon Drive in Landisville.
Flash flooding led to numerous water rescues reported over a several hour period in and around Manheim. Flooding began late on June 30, 2025 and continued into the early morning hours of July 1, 2025.
A severe thunderstorm producing wind gusts estimated at 60 mph knocked a tree down onto US-30 Eastbound at Kinzer Road.
A severe thunderstorm producing wind gusts estimated at 60 mph knocked multiple trees down on Lancaster Pike near Smithville. This caused to road to be closed for a short 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, 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: 1261542, 1259004, 1261545, 1269071, 1261556, 1261557, 1269032, 1261515, 1261514, 1269036, 1269052, 1269073, 1269042, 1269056, 1269063, 1269065, 1269069, 1261511, 1269090, 1261527, 1261520.