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the forecast has now tanked a bit and instead of just cold, we are due to have clouds, then sleet, with ice and more tomorrow morning
You need to fire your weathermen! All of them! And any weatherwomen, also! That's what we do down here if they even mention freezing precip! It's in our County Charter that we allow that kind of stuff only with 48 hour notice to allow closing schools and clean out all grocery stores at least a day ahead of that kind of weather! Another cluse requires any snow/ice to sublimate or melt within 24 hours of the end of such a calamity!
Ironically, our newly hired weather people have forecast snow/sleet/rain tonight! Apparently, they did not check the reason they were hired! They should have seen that they are merely replacements for those who dared allow such weather last time!
Technically, Sunrise is before "dawn", which is defined as the Sun being 6° above the horizon. That means the Sun approximately fully visible. I was giving the Sun a bit of a head start.
All I was saying is that the low would/could start rising well before either "dawn" or Sunrise
only if a warm front passes the thermometer. By definition, a warm front is air that is warmer than the air in front of it. Of course, even a minor volcanic eruption, near the thermometer could be enough to raise the temp, but they are not usually predicted with such accuracy as even the weather!
