(Part of this article is republished from The Conversation under a Creative Commons license.
DETROIT STORM TOTALS DRIVERS
Drivers on Interstate 90 often go from sunny skies to a blizzard and back to sunny skies over a distance of 30 to 40 miles. Lake-effect snowfall in the Buffalo area is typically confined to a narrow region where the wind is coming straight off the lake. The weight of the snow collapsed hundreds of roofs and led to over a dozen deaths. In 2014, some parts of the region received upwards of 6 feet of snowfall during an epic lake-effect event Nov. Residents in places like Buffalo are keenly aware of the phenomenon. In a typical year, annual snowfall in the "lee," or downwind, of the Great Lakes approaches 200 inches in some places. This mechanism is termed "orographic effect." The Tug Hill plateau, located between Lake Ontario and the Adirondacks in western New York, is well known for its impressive snowfall totals. Current conditions and forecasts including 7 day outlook, daily high/low temperature, warnings, chance of precipitation, pressure, humidity/wind chill (when. Land that slopes up from the lake increases lift in the atmosphere, enhancing snowfall rates. Once the snow reaches land, elevation contributes an additional effect. That's close to what Buffalo was experiencing during the storm that started Nov. Imagine a wind out of the west that is perfectly aligned so it blows over the entire 241-mile length of Lake Erie. A long "fetch" - the distance over water - often results in more lake-effect snow than a shorter one. The farther cold air travels over the lake surface, the more moisture is evaporated from the lake. The wind's path over the lakes is important. Snowfall totals Most of Metro Detroit will get between 3-6 inches. More moderate lake-effect snows occur every fall under less extreme thermal contrasts. This often happens in late fall, when lake water is still warm from summer and cold air starts sweeping down from Canada. A difference of 25 degrees Fahrenheit (14 Celsius) or more creates an environment that can fuel heavy snows. We’re getting a look at how much snow each area saw. Rawlins, a climate scientist at UMass Amherst, writes lake-effect snow is strongly influenced by the differences between the amount of heat and moisture at the lake surface and in the air a few thousand feet above it.Ī big contrast creates conditions that help to suck water up from the lake, and thus more snowfall. 4Warn Weather It is very warm and muggy in Metro Detroit. 4Warn Weather The snow has ended, for now, in Metro Detroit, after a winter storm plowed through the area on Wednesday. As the bitter cold air sweeps across the relatively warmer Great Lakes, it sucks up more and more moisture that falls as snow. 7:33 am - Everything seems to be on track, WINTER STORM WARNINGS are in effect through Thursday. It starts with cold, dry air from Canada.
The phenomenon is called "lake-effect snow," and the lakes play a crucial role.
0 kommentar(er)
