Snow, ice, & avalanches:

• National Snow and Ice Data Center
• avalanche.org
• Low Cost Snow Tube Fabrication
• History of Winter, Lake Placid--a project using inquiry-based learning to study snow and ice
• Wilson Bentley, photographer of snowflakes
• USDA/NRCS Western U.S. SNOTEL Snow Water Equivalent Anomaly
• Electron microscopy of snow

Useful tools:

• Useful graph paper
• Another link for graph paper (PC shareware)
• And another...

Coordinate systems:

• An intro to coordinate systems--This page has an explanation of the UTM coordinate system.

Weather/precipitation:

• National Weather Service forecast--Type in a zip code and get a forecast--similar to weather.com or intellicast.com, but no advertising. Plus, check out the Forecast Discussion for more insight about the upcoming weather.
• Intellicast--Need to know how much rain fell in a region of interest? Check out the historic link for cumulative precipitation for the past day or week.

Stream flow/flood forecasting:

• USGS Water Resources--Follow the Real-Time link to data from the nation-wide stream-gage network.
• Northeast River Forecast Center--Flood forecasts for the Northeast region from the National Weather Service. Find links to other regions here.

River basins/big rivers:

• EPA Surf Your Watershed
• Missouri River Infolink
• Susquehanna River Basin Commission

Compilations of links:

• Hydrology Web--A very extensive collection of hydro links.