A slow-moving cold front approached upstate New York from the Great Lakes on Tuesday, September 29th.  Ahead of this front, a southerly flow out of the Gulf of Mexico allowed plenty of tropical moisture to surge into the region, with an unusually humid air mass in place for late September.  As an area of low pressure developed along this boundary, areas of rain showers transitioned into a widespread rainfall during the evening hours, with heavy rainfall falling between the late evening hours and early morning hours on Wednesday, September 30th as the front crossed the region.  Rain fell in excess of one half inch per hour at times.  The rain finally tapered off by the mid to late morning hours, as the front continued to move away from the area.  By the time the rain ended, most areas saw two to four inches of rainfall.  However, localized amounts ranged between five and eight inches in a narrow stripe running southwest to northeast across the eastern Catskills, southeastern Albany County and into eastern Rennselaer County.
As a result of the heavy rainfall, many roads were inundated with standing water, prompting a few temporary road closures.  Although the recent dry conditions and low streamflows prevented many larger rivers from reaching flood stage, some smaller streams and creeks overflowed their banks.  About 20 people, including 13 children, had to be evacuated from homes in Colonie's West Albany section due to flooding along the Patroon Creek and Sand Creek.

Flood in ULSTER, NEW YORK
From 30-SEP-15 09:56:00 to 30-SEP-15 13:00:00 (EST-5)
Location: CENTERVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

New York State Route 212 at the intersection of George Sickle Road in the town of Saugerties was closed due to flooding.

Flood in ALBANY, NEW YORK
From 30-SEP-15 07:00:00 to 30-SEP-15 11:00:00 (EST-5)
Location: NEWTONVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A spotter reported street flooding on East Hills Road in Watervliet as a result of heavy rainfall.  The water rushing down the street had a depth of 4 to 6 inches in spots.

Flood in ALBANY, NEW YORK
From 30-SEP-15 06:00:00 to 30-SEP-15 11:30:00 (EST-5)
Location: ROESSLEVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Central Avenue in Albany was closed between Yardboro Avenue and Frost Place due to flooding.  The underpass beneath Interstate 90 within this area was impassable due to standing water.

Flood in ALBANY, NEW YORK
From 30-SEP-15 07:15:00 to 30-SEP-15 13:05:00 (EST-5)
Location: NORTH BETHLEHEM
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

The intersection of U.S. Route 20 (Western Avenue) and Fuller Road in Albany was closed due to flooding.  At least four vehicles became stranded within the flood waters.

Flood in ALBANY, NEW YORK
From 30-SEP-15 06:55:00 to 30-SEP-15 10:20:00 (EST-5)
Location: ALBANY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

The onramps onto Interstate 90 Westbound from U.S. Route 9 were closed due to flooding.

Flood in ULSTER, NEW YORK
From 30-SEP-15 10:15:00 to 30-SEP-15 14:15:00 (EST-5)
Location: CONNELLY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

New York State Route 213 was closed between County Route 28 (Mountain Road) and County Route 25 (Creek Lock Road) in the town of Ulster due to flooding.

Flood in COLUMBIA, NEW YORK
From 30-SEP-15 10:00:00 to 30-SEP-15 13:00:00 (EST-5)
Location: HUDSON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

New York State Route 23B was closed in the town of Greenport between Middle Road the Hudson City Line due to flooding.

Flood in ALBANY, NEW YORK
From 30-SEP-15 07:00:00 to 30-SEP-15 15:00:00 (EST-5)
Location: LOUDONVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Heavy rain led to flooding in Colonie's West Albany section.  Flooding occurring near the confluence of the Patroon Creek and Sand Creek, causing flooding homes on Sumpter Street.  About 20 people have to be evacuated until water was able to recede.  Although flooding occurred, local media reported it wasn't as bad as in past years.  According to newspaper reports, this area has flooded about a dozen times in the past 15 years.

Flood in RENSSELAER, NEW YORK
From 30-SEP-15 06:00:00 to 30-SEP-15 12:00:00 (EST-5)
Location: AVERILL PARK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

The center courtyard at Averill Park High School in Averill Park was inundated with water due to heavy rainfall.  The drains could not handle the amount of water and backed up, leaving about a foot of water in the courtyard.  A few inches of water came into the school hallways and classrooms through vents and doorways.  As a result of the flooding, school was cancelled for the day and 1,100 students were sent home.

Flood in RENSSELAER, NEW YORK
From 30-SEP-15 06:00:00 to 30-SEP-15 12:00:00 (EST-5)
Location: HAYNERSVILLE
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Newspaper

The access road to Terrace Haven Mobile Park off State Route 7 in Brunswick was washed away due to flooding from heavy rainfall.