The foundation's spring allergy capitals are based partially on tree pollen counts.

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Jackson, Mississippi, tops the list of the worst cities for allergy sufferers

Tennessee has three major cities in the list's top 10

Extreme weather conditions may make allergies worse this season

CNN  — 

It may be even worse for allergy sufferers in certain cities across the country. The foundation has released its annual list of the worst places for spring allergies. Topping the list this year are Louisville, Kentucky; Memphis, Tennessee; and Baton Rouge, Louisiana.

These so-called allergy capitals are ranked based on pollen levels, use of allergy medications and the number of board-certified allergists in the area.

“Allergy and asthma patients already have a chronic sensitivity to things like pollen, mold and other airborne allergens, but they can also be more susceptible to rapid changes in temperature and moisture,” Dr. Clifford Bassett, medical director of Allergy and Asthma Care of NY and an ambassador for the Asthma and Allergy Foundation of America, said in a statement. “A blending of the winter and spring means these patients are at risk of multiple symptoms simultaneously.”

“Severe weather patterns can bring higher temperatures, higher pollen levels and increased exposure to mold, resulting in spring allergies that can peak stronger and last longer,” Dr. Bill Berger, a California allergist, said in the statement.

And in case you were keeping a close eye on this type of thing, here is last year’s list of spring “allergy capitals”:

1. Jackson, Mississippi

2. Knoxville, Tennessee

3. Chattanooga, Tennessee

4. McAllen, Texas

5. Louisville, Kentucky

6. Wichita, Kansas

7. Dayton, Ohio

8. Memphis, Tennessee

9. Oklahoma City

10. Baton Rouge, Louisiana

Residents in Springfield, Massachusetts; Buffalo, New York; and Grand Rapids, Michigan, may face more severe cases than they have in years past. These cities all jumped at least 10 spots up on the list from the spring of 2012.

The Asthma and Allergy Foundation also releases a list every year of the worst cities for fall allergy sufferers. The spring allergy capitals are based on tree pollen counts, while the fall cities are ranked on ragweed pollen counts from September through November of the previous years. Many of the cities on the fall list are on the spring list, but there are a few differences.

1. Louisville, Kentucky

2. Wichita, Kansas

3. Knoxville, Tennessee

4. Jackson, Mississippi

5. McAllen, Texas

6. Dayton, Ohio

7. Oklahoma City, Oklahoma

8. Memphis, Tennessee

9. Madison, Wisconsin

10. Baton Rouge, Louisiana