It has begun... sunny day triggers first pollen blast of season Rebecca Barry, Meteorologist Updated: Tags: Palindrome added this shot of pollen to SnapJax JACKSONVILLE, Fla. – When the sunshine warmed us up this week, we should have known! As we were basking in the mild temperatures under the blue skies on Tuesday, trees all around the River City were gearing up to send plumes of pollen into the air. I noticed a fine dusting of yellow pollen on my car after the noon show Tuesday. I checked our SnapJax page and yep -- pollen pictures were starting to pop up everywhere. I reached for an allergy pill and sighed... Spring pollen season has begun.