The orography along with moisture from the Great Lakes can cause heavy snowfall during winter months.

A macrosopic metaphor for chain reactions is thus a snowball causing larger snowfall until finally an avalanche results ("snowball effect").

"Lake Effect" derives its name from a Midwestern weather pattern - the lakes retain their heat well into winter, causing flashy storms and mammoth snowfall.

The weather in February is somewhat similar to that of January: generally cold, with Western Disturbance causing rains and snowfall.

Western Disturbances begin to cause rain and snowfall.

During fall, winter, and spring, the atmosphere over continents can be cold enough through the depth of the troposphere to cause snowfall.

The evaporation is blown further south causing snowfall in the mountainous western coasts of Japan.

The spring is usually mild and rainy, but it's not uncommon to have sudden cold spells come in from the east, which often cause snowfall.

As a result, cold air spewed across Florida, causing both snowfall and record low temperatures.

In some cases, planes can cause snowfall at a rate of two inches/hr.