A: Flowering of onions can be caused by several things, usually temperature fluctuation. An onion is classed as a biennial which means it usually takes two years to go from seed to seed. However, this condition is triggered by temperatures.
Under what conditions will the front of a glacier remain stationary? Glacial fronts remain stationary when melting and snow accumulation are equal. Glacial fronts remain stationary when friction exceeds gravity forces. Glacial fronts remain stationary when melting and snow accumulation are unequal. Glacial fronts remain stationary when gravity forces exceed friction.
Typical Weather. The exact weather of a stationary front depends greatly on the characteristics of its constituent air masses -- their moisture levels, for example -- and the general instability of the local atmosphere. Often, however, conditions resemble those encountered along warm fronts: extensive cloudiness and showers. As a stationary front can be durable, such overcast and precipitation may persist for days. Severe Weather. Occasionally, stationary fronts may provoke more extreme weather. Series of thunderstorms or heavy rain showers may be shafted down the front, promoting flooding in areas within its influence. A derecho is a fast-moving belt of powerful straight-line winds -- the name comes from the Spanish word for direct -- that are sometimes produced along stationary fronts.