An upper level disturbance moved into a hot and humid environment triggering a line of heavy showers and thunderstorms across Northeast Pennsylvania during the early evening on the 11th. As this line moved over the Wyoming Valley, its eastward progress began to slow, allowing for multiple rounds of heavy rain to move over the downtown Scranton area between 8 and 9 PM EDT followed by additional…
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 BGM wrote it up.
An upper level disturbance moved into a hot and humid environment triggering a line of heavy showers and thunderstorms across Northeast Pennsylvania during the early evening on the 11th. As this line moved over the Wyoming Valley, its eastward progress began to slow, allowing for multiple rounds of heavy rain to move over the downtown Scranton area between 8 and 9 PM EDT followed by additional light to moderate rainfall which ended during the late evening. The intense rainfall occurring in a short period of time in the urban area led to multiple roads closing from or experiencing flash 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 Binghamton, NY wrote its last area forecast discussion before the first event at Jun 11, 6:39 PM EST, 1 hour 2 minutes earlier. Its key messages:
Area Forecast Discussion National Weather Service Binghamton NY 739 PM EDT Thu Jun 11 2026 .WHAT HAS CHANGED... Adjusted thunderstorm timing for today, pushing arrival times back by a few hours. Also adjusted thunderstorm chances for Friday the cold front has been forecast to speed up, limiting storm chances north of the Southern Tier. && .KEY MESSAGES... 1) High heat and humidity continues today, lasting into Friday. The weekend will be cooler but temperatures will remain above normal. 2) Multiple systems will traverse the area, kicking off scattered thunderstorms across the region today and Friday. Some of these storms could be severe, with damaging winds and hail as the main threats. Saturday will remain dry but another cold front on Sunday will bring a return of showers and storms in the afternoon and evening. 3) A broad upper level trough will bring cooler, more normal temperatures to start next week with a few periods of light rain possible. && .DISCUSSION... KEY MESSAGE 1... Temperatures have climbed into the mid 80s for most, and are expected to reach the upper 80s to low 90s by mid afternoon. With dewpoints in the upper 60s to low 70s, heat indices will reach the 90s for most. Valley locations across the Southern Tier and Finger Lakes will see values climb above 95F, which prompted the issuance of a Heat Advisory for these areas until 8pm tonight. Temps and dewpoints will remain high tonight, falling into the mid to upper 60s and mid 60s, respectively. Friday will be warm once again, but a cold front is expected to move into the area in the late morning hours, which will limit heating potential across the Finger Lakes and Mohawk Valley. They may see a brief period of upper 80s before the cold front moves through and drops temps back into the low 80s. Areas along and south of the Southern Tier could see temps reach the mid 80s to low 90s during the afternoon hours ahead of the cold front. With dewpoints in the mid to upper 60s, heat indices will climb back into the 90s. Confidence is not high enough to issue a Heat Advisory for tomorrow afternoon for these areas as questions still remain with the timing and speed of the front moving through and if early rainfall limits heating potential. Behind the front, drier and cooler air will move in with highs in the low to mid 80s on Saturday with dewpoints in the 50s. A ridge on Sunday will push temperatures back into the mid to upper 80s before another cold front pushes through during the afternoon hours. KEY MESSAGE 2... The aforementioned heat and humidity will be the fuel that drives thunderstorm development today and Friday. A shortwave trough is currently moving across northern OH, kicking off showers and storms over WPA and WNY. A cap currently remains over our area, but is expected to erode by 3pm. As the shortwave kicks eastward, it will provide the broad lift that, combined with MLCAPE values between 1500-2000 j/kg, will kick off scattered cellular thunderstorms moving into the area by the mid afternoon hours. As the axis of the shortwave moves into the area, the storms should transition into multi cell or linear segments as they progress across the area late this afternoon and evening. The main threat with the storms is expected to be damaging winds and small hail. PWATs in the 1.75-2.0in range indicate heavy downpours with isolated flash flooding possible, especially across portions of the Finger Lakes and Mohawk Valley that saw heavy rain yesterday. Storms should hit the I-81 corridor between 7 and 8pm and exit to the east by 10pm. Friday will see another round of thunderstorms as a cold front pushes into the area from the west. Guidance has sped up the arrival of this cold front, now expected to push into our western areas by the late morning hours. This will limit CAPE values north of the Southern Tier. Vertical wind shear looks to be lacking ahead of and along the front as well, with values only approaching 20kts or so. With the severe storm ingredients somewhat misaligned, severe storms north of the Southern Tier currently look to be isolated at this time. A few storms may be able to become severe if they can tap into a localized area that has higher CAPE values and moisture, allowing strong downbursts to occur when the updrafts cannot hold the rain any longer. The best chance for severe weather looks to be along and east of the I-81 corridor as CAPE values should be the highest here and mid-level winds are forecast to increase, allowing for better storm organization and stronger winds to develop. Main severe weather impacts expected are damaging winds and hail. Rain should move east of the area by the evening, bringing a cooler, dry night. Dry weather remains through Saturday and into Sunday as a ridge moves overhead. A trough approaches Sunday afternoon with an associated cold front that should kick off scattered showers and storms across the area during the afternoon and evening hours. Some of these storms could be severe. KEY MESSAGE 3... Near normal temperatures will return to start next week as a broad trough sits over the northern portion of the country. This will bring a period of beautiful weather with highs in the 70s and dewpoints in the upper 40s to low 50s. Rain returns by mid week as the trough axis swings through the eastern US. && .AVIATION /00Z FRIDAY THROUGH TUESDAY/... Showers and storms continue to move through the region. While thunderstorms have moved through the Central NY terminals, the line has yet to go through AVP but will do so over the next couple of hours. Heavy rain and strong winds are to be expected when the storms move through. Behind the line, light rain is being observed at some of the Central NY terminals. Following the rain, there is potential for lower ceilings and fog overnight. Confidence is highest at ELM and RME, though fog will be possible at all terminals given the added moisture from the recent rainfall. The uncertainty is with the sky cover as if skies do not clear out, then fog may not develop or will be slower to develop. Lingering low ceilings will be possible after 12z though conditions should return to VFR prior to 18z. There is another line of showers and storms expected tomorrow afternoon, there is uncertainty with timing and coverage. As mentioned, strong gusts should be expected at AVP when the line moves through. Otherwise, winds will become calm this evening and overnight. West to northwest winds will gradually pick up throughout the morning. Peak gusts of 15 to 20 kts are expected during the afternoon. Like today, winds could be strong within showers and storms that pass over terminals. Outlook: Friday Night...Mainly VFR; fog and restrictions late overnight. Saturday...Mainly VFR Sunday...Showers and thunderstorms with associated restrictions possible. Sunday night through Monday...Mainly VFR; early morning fog and restrictions possible. Tuesday...Low chance for afternoon showers and thunderstorms and associated restrictions. && .BGM WATCHES/WARNINGS/ADVISORIES... PA...None. NY...None. && DISCUSSION...JTC AVIATION...BTL
Hazardous Weather Outlook National Weather Service Binghamton NY 729 PM EDT Thu Jun 11 2026 NYZ024-025-036-044>046-055>057-PAZ038>040-043-044-047-072-122330- Chemung-Tompkins-Madison-Cortland-Chenango-Otsego-Tioga-Broome- Delaware-Bradford-Susquehanna-Northern Wayne-Wyoming-Lackawanna- Luzerne-Southern Wayne- 729 PM EDT Thu Jun 11 2026 ...SEVERE THUNDERSTORM WATCH 315 IN EFFECT UNTIL 10 PM EDT THIS EVENING... This Hazardous Weather Outlook is for central New York and northeast Pennsylvania. .DAY ONE...Tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Severe Thunderstorm Watch. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. NYZ062-PAZ048-122330- Sullivan-Pike- 729 PM EDT Thu Jun 11 2026 ...SEVERE THUNDERSTORM WATCH 317 IN EFFECT UNTIL MIDNIGHT EDT TONIGHT... This Hazardous Weather Outlook is for central New York and northeast Pennsylvania. .DAY ONE...Tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Severe Thunderstorm Watch. There is a marginal risk for severe storms today, which may produce heavy rain, damaging winds and hail. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. The thunderstorm risk continues on Friday, as a cold front brings another round of thunderstorms to the area. Some of these storms may become severe. Also, the heat and humidity continues on Friday, with peak heat indices potentially reaching the mid 90s across valley locations. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to Standard Operating Procedures. Please relay any information about severe weather to the NWS. NYZ009-015>018-022-023-037-122330- Northern Oneida-Yates-Seneca-Southern Cayuga-Onondaga-Steuben- Schuyler-Southern Oneida- 729 PM EDT Thu Jun 11 2026 This Hazardous Weather Outlook is for central New York. .DAY ONE...Tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
Preliminary Local Storm Report
National Weather Service Binghamton NY
751 PM EDT Thu Jun 11 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0735 PM Tstm Wnd Dmg 1 SE Elk Lake 41.74N 75.93W
06/11/2026 Susquehanna PA 911 Call Center
Tree down blocking roadway.
&&Preliminary Local Storm Report
National Weather Service Binghamton NY
752 PM EDT Thu Jun 11 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0730 PM Tstm Wnd Dmg Montrose 41.83N 75.88W
06/11/2026 Susquehanna PA 911 Call Center
Multiple trees down on roadways in Montrose.
&&Preliminary Local Storm Report
National Weather Service Binghamton NY
815 PM EDT Thu Jun 11 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0803 PM Tstm Wnd Dmg 2 ENE Lake Como 41.87N 75.30W
06/11/2026 Wayne PA 911 Call Center
Tree down over roadway.
&&Preliminary Local Storm Report
National Weather Service Binghamton NY
826 PM EDT Thu Jun 11 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0808 PM Tstm Wnd Dmg Glenburn 41.51N 75.74W
06/11/2026 Lackawanna PA 911 Call Center
Tree down over roadway.
&&Preliminary Local Storm Report
National Weather Service Binghamton NY
829 PM EDT Thu Jun 11 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0826 PM Tstm Wnd Dmg Honesdale 41.58N 75.26W
06/11/2026 Wayne PA 911 Call Center
Trees down over Riverside Drive and Park
Street.
&&Preliminary Local Storm Report
National Weather Service Binghamton NY
841 PM EDT Thu Jun 11 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0841 PM Flash Flood 1 SE Scranton 41.40N 75.66W
06/11/2026 Lackawanna PA 911 Call Center
Multiple roads reported to be closed and/or
have flash flooding.
&&The Binghamton radar (KBGM), 92 km away, was scanning. The volume nearest the first event began at 00:40 UTC.
1 flash flood. Local standard time, as filed.
Officials reported multiple roads were experiencing flash flooding and were closed.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Pennsylvania in 2026Every state in 2026This day in weather historyWarnings in Pennsylvania, June 2026
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: 1355726.