The Great Lakes act as "snow machines." Cold air blowing over the relatively warm water picks up moisture and dumps feet of snow on cities like Buffalo, Syracuse, and Grand Rapids.
As the jet stream wobbles north, it drags warm, moist air from the Gulf of Mexico, colliding with lingering cold Canadian air. The result is volatile: violent tornadoes rip across "Tornado Alley" (Texas to Nebraska), while late snowstorms, or "Nor'easters," can still bury New England. Yet amid this chaos, life returns. The maple sap flows, tapped by Vermont farmers for syrup. The cherry blossoms bloom in Washington, D.C., a fleeting symbol of renewal. Spring is the continent’s most hopeful, and most dangerous, season—a promise of warmth that always comes with a fight. seasons in north america
solstices (the longest/shortest days). Wikipedia +5 Season Meteorological Dates Astronomical Marker Spring March 1 – May 31 Vernal Equinox (March 19-21) Summer June 1 – August 31 Summer Solstice (June 20-22) Fall Sept 1 – Nov 30 Autumnal Equinox (Sept 21-24) Winter Dec 1 – Feb 28/29 Winter Solstice (Dec 20-23) Seasonal Features & Regional Impacts 13 sites Changing seasons | National Oceanic and Atmospheric Administration Apr 29, 2025 — The Great Lakes act as "snow machines
In the Southwest (Arizona, Nevada, Sonora), summer brings extreme dry heat, often exceeding 110°F. This is also the time of the North American Monsoon , which brings sudden, violet afternoon downpours to the desert. Yet amid this chaos, life returns
For the majority of the United States and the populated regions of Canada, the calendar follows the classic four-season cycle. This is driven by the tilt of the Earth’s axis.
Periodically, the jet stream dips low, bringing "Siberian" air into the heart of the continent. Temperatures in the Canadian Prairies and the Upper Midwest can plunge well below -30°F.