JACKSONVILLE, Fla. — We've made it to Friday and as we head into the weekend changes are on the way, just like a mullet changes from business in the front to a party in the back.

We all remember that picture that swirled around social media last weekend, the one that said, "the weather just went from 90 to 55 like it saw a state trooper". 

Temperature Swings
Cold fronts make us double take the weather for a second.
wtlv weather

That's the case again, not exactly 90 to 55, but 84 on Thursday to the 60s today. But it's not the state trooper making the temperatures drop, it's a front.

Temperature Swings
Highs in the 80s on Thursday drop into the 60s, even upper 50s, by late Friday.
wtlv weather

You've heard the First Coast News Storm Experts talk about fronts time in and time out, whether it's a cold front, warm front, stationary front or the occluded front. Fronts are simply the boundary between two different air masses. Today, it's the door that separates warm & moist air from cool & dry air. 

Cold Front: 11/8/19
The autumn cold fronts are the boundary between retreated warm moist air and advancing cold dry air.
wtlv weather

This time of year, the transition of two different air masses are what we notice the most. Now let's talk about today, a cold front is dropping through the area. The leaded edge of the colder air is advancing. So today we're opening the door for the colder air to come blowing in. 

How do we feel or see this? Weather happening. The rain, the clouds, the wind increasing and the temperatures dropping.

But wait! Veteran's Day we're back to 80 degree warmth, why!? Because we'll be ahead of another front - in the warm & moist air. So then when that next front arrives, we'll open the door and transition to the cooler weather behind it. These fronts support the idea that the autumn season is simply full of changes.