An allergy forecast predicts future pollen levels for an area by identifying patterns in historical pollen indexes and current pollen reports. Pollen.com offers a free 5-day pollen forecast so you can plan for this week's pollen levels.
Allergy sufferers depend on daily pollen reports to decide if they need to increase their allergy medication when going outdoors. A pollen report provides daily updates on pollen levels.
The pollen index details the total estimated pollen emitted for the year. The pollen index is higher when there are optimal environmental conditions. For example, a longer season of spring-like weather will garner a higher pollen index.
The primary factor that influences the pollen index is the number of pollen sources, which are flowering plants that produce pollen. Geographic areas with a high level of pollen-producing vegetation will have a higher corresponding pollen level during peak fertilization season.
Pollen levels and sources also vary depending on the season. During the spring months the mustard, canola, and /berry plants will contribute highest to the pollen count, whereas the elder, oak and ash trees can create a high allergy forecast.
Pollen levels indicate the amount of pollen in the air. As mentioned earlier, season and geographic area are the two primary factors that contribute to higher pollen levels. A common misconception is that pollen levels will be almost zero during colder months. Trees actually start producing pollen as early as January in southern states. They also produce such a large volume of pollen that it can increase pollen levels miles away.
Also, be aware that regardless of your outdoor pollen level and allergy report, pollen can still be transported indoors by animals and clothing.
With so many variables influencing pollen levels, it's useful to obtain daily pollen levels for your area. Pollen.com's pollen level guide can be used with the five day pollen level forecast so you can take defensive action against high pollen levels, such as using medication which reduces pollen allergy symptoms.