On March 5th, an active storm system developed and moved across the Gulf coast states. This storm produced severe weather, including deadly tornadoes along the Gulf coast and major flooding across the Tennessee River Valley. In New York, a cold front was draped across western New York with rainfall immediately along the cold front and temperatures in the 40s across northern New York that promoted significant snow melt to the region.
On March 6th, this storm began to move north across the southeast and Mid-Atlantic states along a slow moving cold front positioned across New York south to Florida. More heavy rainfall, flooding and severe weather accompanied this system. In northern New York, heavy rainfall and temperatures in the 40s preceded the cold front. However, as the cold front crept across northern New York during the morning hours, temperatures fell 12-15 degrees within an hour and heavy rain changed to heavy sleet and wet snow.
At the same time, rapid snow melt and heavy rainfall accounted for area ice-covered rivers to swell and cause ice flows. A significant ice jam formed in the Keene Valley between Jay and Keene that resulted in moderate to major flooding of numerous homes and forced evacuations during a major snowstorm.
Heavy snow continued from the afternoon of March 6th to midday on March 7th with the heaviest occurring in the early morning hours of the 7th with snowfall rates of 1 to 3 inches per hour. Total snowfall accumulations ranged from 5 to 10 inches in the St. Lawrence River Valley to 18 to 30 inches across much of the Adirondacks and Champlain Valley.
Most roads were impassable with numerous accidents and stuck vehicles. Nearly 5000 customers lost electrical power, nearly all school districts were closed on the 7th along with local/state government as State of Emergencies were declared in Clinton and Essex counties.

Winter Storm in WESTERN ESSEX, NEW YORK
From 06-MAR-11 11:00:00 to 07-MAR-11 14:00:00 (EST-5)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall amounts of 20 to 32 inches were reported in Essex county, including; 32 inches in Bloomingdale, 27 inches in Westport and 23 inches in Lake Placid and Moriah.

Winter Storm in NORTHERN FRANKLIN, NEW YORK
From 06-MAR-11 09:00:00 to 07-MAR-11 14:00:00 (EST-5)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall amounts of 18 to 30 inches were reported in Franklin county, including; 29  inches in Tupper Lake, Saranac Lake, 24 inches in Malone and 18 inches in Whippleville.

Winter Storm in EASTERN CLINTON, NEW YORK
From 06-MAR-11 10:00:00 to 07-MAR-11 15:00:00 (EST-5)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall amounts of 18 to 24 inches were reported in Clinton county, including; 24 inches in Peru, 22 inches in Plattsburgh and Morrisonville.

Winter Storm in SOUTHERN FRANKLIN, NEW YORK
From 06-MAR-11 09:00:00 to 07-MAR-11 14:00:00 (EST-5)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall amounts of 18 to 30 inches were reported in Franklin county, including; 29  inches in Tupper Lake, Saranac Lake, 24 inches in Malone and 18 inches in Whippleville.

Winter Storm in EASTERN ESSEX, NEW YORK
From 06-MAR-11 11:00:00 to 07-MAR-11 15:00:00 (EST-5)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall amounts of 20 to 32 inches were reported in Essex county, including; 32 inches in Bloomingdale, 27 inches in Westport and 23 inches in Lake Placid and Moriah.

Winter Storm in SOUTHEASTERN ST. LAWRENCE, NEW YORK
From 06-MAR-11 10:00:00 to 07-MAR-11 14:00:00 (EST-5)
Property damage: 5.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall amounts of 6 to 12 inches were reported in St. Lawrence county.

Winter Weather in NORTHERN ST. LAWRENCE, NEW YORK
From 06-MAR-11 09:00:00 to 07-MAR-11 10:00:00 (EST-5)
Property damage: 5.00K
Crop damage: 0.00K
Reported by: COOP Observer

Heavy rainfall followed by 4 to 7 inches of wet snow.

Winter Storm in WESTERN CLINTON, NEW YORK
From 06-MAR-11 09:00:00 to 07-MAR-11 14:00:00 (EST-5)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall amounts of 18 to 24 inches were reported in Clinton county, including; 24 inches in Peru, 22 inches in Plattsburgh and Morrisonville.

Winter Weather in SOUTHWESTERN ST. LAWRENCE, NEW YORK
From 06-MAR-11 11:00:00 to 07-MAR-11 10:00:00 (EST-5)
Property damage: 5.00K
Crop damage: 0.00K
Reported by: COOP Observer

Heavy rainfall followed by 4 to 7 inches of wet snow.

Flood in ESSEX, NEW YORK
From 06-MAR-11 14:30:00 to 06-MAR-11 22:30:00 (EST-5)
Location: UPPER JAY
Flood cause: Ice Jam
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Emergency Manager

An ice jam moved down the East Branch of the Ausable River from Keene through Ausable Forks. The first report of flooding was from a jam flooding Route 9N and Trumbulls Corners Road near Upper Jay at 1433 EST. The jam moved downstream, and flooded Route 9N near Sticknee Bridge between the villages of Ausable Forks and Jay at 1735 EST. At 1850 EST reports were received of evacuations of at least 25 homes underway in the Jersey area of Ausable Forks village due to the ice jam. By 2230 EST the jam had moved on downstream on the Ausable River.