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Index numberCityStateRiverJam dateWater yearJam typeLatitudeLongitudeGage numberAhps idCurrent conditionDamagesDescription
20260107150621ComoILRock River12/14/20262026Freeze-up41.756397-89.772311-CMOI2releasedNo flooding reported.Jam reported on the Rock River near Como, IL. Jam shifted/repositioned over about a week before releasing c 22 December.
20260512165014McGrathAKKuskokwim River05/10/20262026Break-up62.92791-155.5859--causing floodingMinor flooding is affecting the south end of the runway causing road closure and forcing DOT to turn off the runway lights in that area.A break-up jam formed just downstream of McGrath, AK.
20260512164153HughesAKKoyukuk River05/09/20262026Break-up66.02854-154.26929--causing floodingWidespread flooding, exacerbated on 10 May by heavy flows from upstream that may have dislodged part of the jam but worsened the flooding.A break-up jam formed near Hughes, AK, on the Koyukuk River.
20260512161533AniakAKKuskokwim River05/07/20262026Break-up61.58664-159.85593--causing floodingFlooding in the woods above the jam, though river is reportedly passing most of its flow. Some concern for Aniak if a run comes from upstream.A break-up jam formed near Birch Crossing, a notably narrow, shallow section of the Kuskokwim River ~12 miles downstream of Aniak.
20260512152813ChalkyitsikAKDraanjik River05/06/20262026Break-up66.69888-143.96296--causing floodingFlooding reported in several homes in Chalkyitsik.Break-up jam formed just downstream of Chalkyitsik, AK. Jam seems to have released by 5/11 and flood waters have begun to recede.
20260512144034Fort YukonAKDraanjik River05/05/20262026Break-up66.65947-144.72551--causing floodingLowland flooding was reported and a warning was issued.Break-up jam formed near the confluence of the Draanjik and Porcupine Rivers near Fort Yukon.
20260505165529BadgerAKChena River05/04/20262026Break-up64.846748-147.410981--releasedNone reported.Break-up jam near Nordale Road Bridge on the Chena River. Riverwatch reports it broke up later the same day (5/4).
20260306153710WhipplevilleNYSalmon03/27/20262026Break-up44.796231-74.252021--releasedNo flooding reported, but local EM has used excavators to try to mitigate/limit the jam's impact based on concerns due to its size.Large break-up jam formed in the Salmon River south of Malone, NY.
20260324150619MiloMEPleasant RIver03/19/20262026Break-up45.26344-68.965901--releasedLowland flooding and at least one road closure were reported. No damage to residences was reported.A breakup jam formed near the Pleasant St. bridge on the Pleasant River near Milo, ME.
20260324151949HoultonMEMeduxnekeag River03/18/20262026Break-up46.106762-67.879713--releasedMinor flooding was reported, though no residences were affected.A breakup jam formed on the Meduxneakeag River southwest of Houlton, ME, downstream of the South Fork USGS gage, which crested just below moderate flood stage before the jam released on 3/18.
20260324151219MaxfieldMEPiscataquis River03/18/20262026Break-up45.278602-68.73128--releasedAt least one road closure and minor lowland flooding was reported. No residences were affected.A breakup jam formed near Maxfield, ME. The local fire department performed door-by-door wellness checks along the river and evacuated at least 3 homes. The jam released on 3/19.
20260312155756JohnsburgNYHudson River03/11/20262026Break-up43.585586-73.862286--releasedNo flooding was reported.Break-up jam formed at the confluence of Glen Creek and the Hudson River southeast of Johnsburg, NY, near the Rt 28 bridge across the Hudson. Local EM say the river has routed around the jam.
20260310132532MorrisonvilleNYSaranac River03/10/20262026Break-up44.695414-73.552815--releasedMinor lowland flooding was reported, though local EM indicated no homes were affected yet and the stage had seemed to stabilize c. 3/10 0800.A break-up jam formed just downstream of Morrisonville, NY, on the Saranac river, prompting local concerns about re-jamming in nearby downtown Plattsburg.
20260310145026ClintonvilleNYAusable River03/09/20262026Break-up44.464199-73.575411--releasedNo flooding reported.A break-up jam formed around Clintonville, NY, on the Ausable River after an upstream jam near Au Sable Forks released.
20260310140744SchenectadyNYMohawk River03/09/20262026Break-up42.850018-73.888872--releasedMinor flooding has closed several roads, and SUNY Schenectady has closed as a precaution.A series of ice jams is affecting the reach of the Mohawk River from approximately Scotia to Lock and Dam 7, including Schenectady.
20260310151640NorthumberlandNHAmmonoosuc River03/09/20262026Break-up44.625214-71.469648--releasedNo flooding was reported.A break-up jam was reported near the Emerson Road Bridge on the Ammonoosuc River near Northumberland, NH.
20260310145913MooersNYGreat Chazy River03/09/20262026Break-up44.959238-73.61059--releasedSignificant damage due to flooding occurred at Mooers Camp just west of Mooers. Nearby stage readings reached moderate at two different times as the jam shifted.A break-up jam formed near Mooers, NY, on the Great Chazy River.
20260310144755Au Sable ForksNYAusable River03/08/20262026Break-up44.441056-73.672686--releasedMinor flooding was reported for approximately 2 hours in Au Sable Forks and as far upstream as Jay, NY, before the jam released.A break-up jam formed near Au Sable Forks on the Ausable River.
20260310142915MoretownVTMad River03/08/20262026Break-up44.251049-72.762128--releasedLowland flooding reported. Local EM is worried situation may worsen when Waitsfield jam upstream releases.A break-up jam formed near Moretown, VT.
20260310142138WaitsfieldVTMad River03/08/20262026Break-up44.189499-72.82231--releasedMinor flooding has caused road and parking closures in Waitsfield.A break-up jam formed just below the covered bridge in Waitsfield, VT. Released on 3/10.
20260224180837MiddletownPASwatara Creek02/23/20262026Break-up40.191401-76.730453--releasedMinor flooding was reported, though the jam reportedly released around 15:30 on 2/23.Break-up jam was reported on Swatara Creek near its confluence with the Susquehanna River at Middletown, PA.
20260303165336Wilkes-BarrePASusquehanna River02/21/20262026Break-up41.24875-75.90381--releasedRiver reached and held action stage at the Wilkes-Barre gage for almost 6 days, but no flooding or damage was reported.Break-up jam formed downstream of Wilke-Barre. Hydrograph suggests release on 1 March, though jam is still in place that morning in satellite imagery.
20260224193816FoxburgPAAllegheny River02/20/20262026Break-up41.14262-79.68385--releasedMinor flooding was reported in Emlenton, PA, and at several other places along the Allegheny in Venango County.Breakup jam formed near Foxburg, PA, on the Allegheny River and is affecting stages in Emlenton and farther upstream.
20260217142619St. GeorgeWVCheat River02/20/20262026Break-up39.169299-79.712689--releasedNo flooding was reported.Break-up jam formed on the Cheat River near St. George, WV. Released by the following morning.
20260224185426RimerPAAllegheny River02/20/20262026Break-up40.940706-79.540054--releasedMajor flooding at nearby River Bend Campground; owners cite river stages in excess of 30 ft (~15 ft above normal), enough to inundate the campground and move several RVs/trailers.Break-up jam formed below Allegheny Lock and Dam 9 (Rimer Lock and Dam). Location very approximate, pending satellite imagery.
20260303171445EastlakeOHChagrin River02/18/20262026Break-up41.671606-81.428516--releasedMinor flooding was reported. The jam released the same day.Break-up jam reported on the Chagrin River just below the Chagrin River Yacht Club in Eastlake, OH.
20260210180018Grand IslandNEPlatte River02/09/20262026Break-up40.82397-98.35109--releasedMinor flooding reported.Break-up jam reported in one of the braids of the Platte River; location inferred from inundated area in PlanetScope imagery from 2/9/26.
20260203174645North ForkIDSalmon River01/28/20262026Break-up45.364524-113.954818--releasedLowland flooding was reported, including impacts to Wagonhammer Campground and RV park.An ice jam was reported south of North Fork, ID, near Maxwell Lane on the Salmon River. The jam extends up to North Fork.
20260127174457NewportNYWest Canada Creek01/26/20262026Freeze-up43.19232-75.02317--releasedLocal officials report water in several residents basements and fear higher stages downstream if the jam breaks.Freeze-up jam formed on West Canada Creek in Newport, NY.
20260210194053South LakesAKWasilla Creek01/26/20262026Freeze-up61.580542-149.272058--releasedMinor flooding reported including overtopping several nearby roads, Tiffany Drive and Lower Rd. Local EM says it "happens every year" and won't stop until the river and jam melt out.Freeze-up jam formed on Wasilla Creek, reported exacerbated by a beaver dam. Road crews are grading nearby roads daily to keep them ice free.
20260131134335TrentonNJDelaware River01/25/20262026Freeze-up40.134898-74.744394-tren4releasedNo flooding reported.A freeze-up jam formed downstream of Trenton, NJ. Location is inferred from satellite imagery and gauge records, though the gauges below Trenton are heavily influenced by the tide. Jam has caused a ~2 ft rise in river stage at Trenton and depressed stage downstream at Baxter Water Treatment. As of 1/31, stage at Trenton continues to slowly raise, which may lead to mechanical reorganization or breakup of the jam.
20260203173535LemhiIDLemhi River01/24/20262026Break-up44.876992-113.626028--releasedLemhi gauge reported readings over flood stage for much of 1/29, though stage increase starting on the 24 was strangely linear. The water crested around 7' before the jam apparently released.Freeze-up jam formed on the Lemhi River near Lemhi, Id.
20260127144009ColumbusNEPlatte River01/23/20262026Freeze-up41.400089-97.305964--releasedMinor flooding in low-lying areas reported.Freeze-up jam reported near the confluence of the Platte and Loup Rivers outside Columbus.
20260127192339Aroma ParkILKankakee River01/22/20262026Freeze-up41.078056-87.817796--releasedNo flooding reported.Freeze-up jam formed on the Kankakee River near it's confluence with the Iroquois River near Aroma Park.
20260127192140KankakeeILKankakee River01/22/20262026Freeze-up41.208004-88.016148--releasedMinor lowland flooding reported. Deemed 'not impactful'.Freeze-up jam formed on the Kankakee River near the Will County line.
20260123143417AylesworthINKankakee River01/21/20262026Freeze-up41.2813-87.103409--releasedNo flooding reported.Freeze-up jam near Aylesworth, IN.
20260127191610MomenceILKankakee River01/20/20262026Freeze-up41.160214-87.665708--releasedNo flooding reported.Freeze-up jam formed on the Kankakee River near Momence.
20260127190627West DundeeILFox River01/19/20262026Freeze-up42.098699-88.276425--releasedNo flooding reported. Jam remains in place with little backwater effect.Freeze-up jam formed on the Fox River near East/West Dundee.
20260127191656RocktonILRock River01/19/20262026Freeze-up42.461025-89.086822--releasedNo flooding reported.Freeze-up jam formed on the Rock River near Rockton.
20260127191049ShelbyINKankakee River01/19/20262026Freeze-up41.18231-87.346583--releasedNo flooding reported.Freeze-up jam formed on the Kankakee River near Shelby.
20260127191237Cherry ValleyILKishwaukee River01/19/20262026Freeze-up42.236559-88.954091--releasedNo flooding reported.Freeze-up jam formed on the Kishwaukee River near Perryville/Cherry Valley.
20260127190117Des PlainesILDes Plaines River01/18/20262026Freeze-up42.049951-87.873006--releasedNo flooding reported. Jam remains in place with little backwater effect.Freeze-up jam formed on the Des Plaines River near Des Plaines.
20260127190252LyonsILDes Plaines River01/18/20262026Freeze-up41.825404-87.820063--releasedNo flooding reported. Jam remains in place with little backwater effect.Freeze-up jam formed on the Des Plaines River near Lyons.
20260127191819Latham ParkILRock River01/18/20262026Freeze-up42.355411-89.056946--releasedNo flooding reported.Freeze-up jam formed on the Rock River near Latham/Machesney Park.
20260127190456LemontILDes Plaines River01/17/20262026Freeze-up41.676397-88.019907--releasedNo flooding reported. Jam remains in place with little backwater effect.Freeze-up jam formed on the Des Plaines River near Lemont.
20260120164142MaskellNEMIssouri River01/17/20262026Freeze-up42.72863-96.887465-MRPN1releasedNo flooding was reported.Missouri River Reservoir Regulation reported an ice jam formed between Ponca and Maskell on 17 January.
20260120155913ClevelandILRock River01/17/20262026Freeze-up41.485319-90.373046-JOSI2releasedMinor flooding was reported in Cleveland, IL.A series of ice jams have formed upstream of Moline, IL, and are affecting stages as far upstream as Joslin, IL.
20260113142844PortlandMIGrand River01/07/20262026Break-up42.87074-84.903084-PORM4releasedBasement flooding near the river was reported but residents noted no significant damages ("not like 2019").A (presumed) break-up jam formed in downtown Portland, MI, between the Bridge St and Grand River Ave Bridges.
20260106143702BooneIADes Moines River01/02/20262026Freeze-up41.991425-93.894326--releasedLowland flooding reported; roads within park expected to be impacted if jam holds (c 1/5)Ice jam reported near the boat ramp at Ledges State Park on the Des Moines River.
20260127190833OswegoILFox River01/02/20262026Freeze-up41.682186-88.360101--releasedMinor lowland flooding reported.Freeze-up jam formed on the Fox River near Oswego.