Station Name: MONGAUP RIVER NEAR MONGAUP NY
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 673 feet

Nearest Address:
20–98 Powerhouse Rd
Glen Spey, NY 12737
Sullivan County

GPS Coordinates: 41.4612222, -74.75877778

Nearby Water Temperatures

Flash Flood Warning issued July 21 at 2:37PM EDT until July 21 at 7:00PM EDT by NWS Binghamton NY

Effective: Tue July 21, 2026, 2:37 PM
Expires: Tue July 21, 2026, 7:00 PM

FFWBGM The National Weather Service in Binghamton has issued a * Flash Flood Warning for... Northwestern Sullivan County in central New York... East Central Wayne County in northeastern Pennsylvania... * Until 700 PM EDT. * At 237 PM EDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 1 and 3 inches of rain have fallen. The expected rainfall rate is 2 to 3 inches in 1 hour. Flash flooding is ongoing or expected to begin shortly. HAZARD...Flash flooding caused by thunderstorms. SOURCE...Radar. IMPACT...Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other poor drainage and low-lying areas. * Some locations that will experience flash flooding include... Liberty, Damascus, Callicoon, Cochecton, Jeffersonville, White Sulphur Springs, Hazel, Roscoe, Livingston Manor, Hortonville, Fosterdale, Parksville, Hankins, Stalker, Willowemoc, Rockland, Fremont, Callicoon Center, Shandelee and Briscoe. Additional thunderstorms are expected to move into the area through the afternoon where conditions may become even worse.

Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Flooding is occurring or is imminent. It is important to know where you are relative to streams, rivers, or creeks which can become killers in heavy rains. Campers and hikers should avoid streams or creeks.

Flood Watch issued July 21 at 2:43AM EDT until July 22 at 2:00AM EDT by NWS Upton NY

Effective: Tue July 21, 2026, 2:43 AM
Expires: Tue July 21, 2026, 6:00 PM

* WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of northeast New Jersey, including the following areas, Eastern Bergen, Eastern Essex, Eastern Passaic, Eastern Union, Hudson, Western Bergen, Western Essex, Western Passaic and Western Union and southeast New York, including the following areas, Bronx, Kings (Brooklyn), New York (Manhattan), Northern Queens, Richmond (Staten Island) and Southern Queens. * WHEN...From 8 AM EDT this morning through late tonight. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Flooding may occur in poor drainage and urban areas. * ADDITIONAL DETAILS... - Multiple rounds of showers and thunderstorms are expected this morning through tonight. Average rainfall totals will be between 1 and 2 inches, with isolated totals around 3 to 4 inches possible. Peak rainfall rates in the strongest storms could be near 2.5 inches per hour. - http://www.weather.gov/safety/flood

You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.

Flood Watch issued July 21 at 9:51AM EDT until July 22 at 2:00AM EDT by NWS Upton NY

Effective: Tue July 21, 2026, 9:51 AM
Expires: Tue July 21, 2026, 9:30 PM

* WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of northeast New Jersey, including the following areas, Eastern Bergen, Eastern Essex, Eastern Passaic, Eastern Union, Hudson, Western Bergen, Western Essex, Western Passaic and Western Union and southeast New York, including the following areas, Bronx, Kings (Brooklyn), New York (Manhattan), Northern Queens, Richmond (Staten Island) and Southern Queens. * WHEN...Through late tonight. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Flooding may occur in poor drainage and urban areas. * ADDITIONAL DETAILS... - Multiple rounds of heavy downpours and thunderstorms are expected this morning into tonight. Averaged rainfall totals will be between 1 and 2 inches, with localized swaths of 3 to 4 inches possible. Peak rainfall rates in the strongest storms could be 2-3 inches per hour. - http://www.weather.gov/safety/flood

You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.