Allergies & Pollen Count for Keystone, South Dakota

Today's Condition

10.6High

Top Allergens:

Ragweed, Nettle, Sagebrush/Sage

Pollen Index

9.7 - 12 - High

Very high pollen levels. Symptoms are likely for most people with pollen allergies.

7.3 - 9.6 - Medium - High

High enough pollen levels that most allergy sufferers will notice symptoms.

4.9 - 7.2 - Medium

Moderate pollen levels. Many people with allergies may start experiencing symptoms.

2.5 - 4.8 - Low - Medium

Small amounts of pollen present. Highly sensitive individuals may notice mild symptoms.

0.0 - 2.4 - Low

Very little pollen in the air. Most people with pollen allergies will not experience symptoms.

Discussion

The quantity of pollen grains in the air for Tuesday will be falling but will remain in the very high range. Since the weather has a major influence on pollen dispersal, this decrease is due in part to falling temperatures, higher dew points and lack of strong winds.

Allergy Facts

Ragweed generally grows in disturbed soil (e.g., tilled agricultural fields, construction sites). Ecologists consider ragweed a pioneer plant for its ability to invade vacant soils or soils that cannot support other vegetation.