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Severe weather can occur under a variety of situations, but three characteristics are generally needed: a temperature or moisture boundary, moisture, and (in the event of severe, precipitation-based events) instability in the atmosphere.
The subarctic climate (also called subpolar climate, or boreal climate) is a continental climate with long, cold (often very cold) winters, and short, warm to cool summers. It is found on large landmasses, often away from the moderating effects of an ocean, generally at latitudes from 50°N to 70°N, poleward of the humid continental climates .
A cold wave is a weather phenomenon that is distinguished by a cooling of the air. Specifically, as used by the U.S. National Weather Service, a cold wave is a rapid fall in temperature within a 24-hour period requiring substantially increased protection for agriculture, industry, commerce, and social activities. The precise criterion for a ...
"Cold weather will still occur, but cold air outbreaks tend to be less frequent," the agency said. During El Niño, the polar jet stream stays north of the Great Lakes, meaning warmer and possibly ...
The fall clash of seasons will be apparent this week across the U.S. as a mix of severe storms, wintry weather and wild temperature swings make for an active stretch of weather for millions of ...
This is a list of the coolest exoplanets known, specifically those with temperatures lower than −75 °C (198 K). Planets from the Solar System were also included for comparison purposes.
The cold temps will be replaced by much milder air next week, but the warmth will come after a frigid, snowy weekend for portions of the northeastern U.S. Up to a foot of snow is expected near the ...
This downward surge of relatively cool mid-level air, due to interactions between dew points, humidity, and condensation of the converging of air masses, can reach very high speeds and is known to cause widespread wind damage. The radar signature of an RFD is a hook-like structure where sinking air has brought with it precipitation.