NOAA Interactive Weather Map
Here we have an online interactive web mapping tool with NOAA American weather station information, there are a good number of Canadian ones as well. The Weather Service provides weather, hydrologic, and climate forecasts and warnings for the United States, its territories, adjacent waters and ocean areas, for the protection of life and property and the enhancement of the national economy. Their operational server maintains a current database of meteorological and hydrological data, historical data, and written information generated by the NWS or other official sources.