I have walked to and from work almost every work day for the past 9 and a half years. I have experienced all kinds of weather, from sweltering, humid summer days to icy days with wind chill around 0 degrees. I've been caught out in thunderstorms, though I try hard to avoid that, as a lightning flash almost simultaneous with a deafening thunder clap right overhead is a sure sign you are in the wrong place and time.
It has been cloudy for several days. Last night it rained, and there were strong winds as a front moved through. This morning the streets and paths were covered with leaves, but the sky was clear and blue and the morning sun glistened off the wet landscape.
The temperature was cool, but pleasant to walk in. About halfway to work, I felt the air get warmer, as if I had stepped from outside through a door into a warm house. I can't be sure of the temperature change, but my guess is about 5 degrees. Mid-stride, the temperature changed - there was no gradient as far as I could tell.
I've experienced this before on my walks, not often, but a couple other times over the past nine years. It's a strange sensation - there is no warning - nothing you can see - but there is colder air here, and warmer air there. I've experienced passing storm fronts when there is a quick temperature change, but there's usually wind, a lot of movement in the air, and often there are clouds blowing in, which give a visual clue that change is coming.
Things like this are the small rewards of walking to and from work - spending about an hour a day experiencing whatever the weather has for me that day. This morning it happened that two air masses nudged up against each other about perpendicular to my path, giving me a surprising sensation at the start of my day, and reminding me that I can never know for certain what the next step will bring.
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