The weathercritters are saying that much of Florida will have low temps at or below 32° over the weekend. So... is this the usual? Or has the freqency of freezing temps in Fla. lower than it used to be?
The star attraction is the 1894/95 Great Freeze. Some mentions elsewhere use this event(s) as proof that climate change is bogus!! While there have been ongoing freezes since then, some of which reside in my own long-term memory, this was a (so far) unique event. The wiki piece states that Orlando fell to a record 18°; my Google Weather app says that Orlando will bottom out at 26° on Sunday.
Here's a table for Orlando 32° days from 1892. Just from eyeballing, it's 'true' that the frequency (overall) has markedly decreased from 1892 to now. Who wooda thunk it? Although the volatility (by which I mean the range of 32° days for spans of years is now narrower), also from just eye-balling, appears greater now than way-back-when. That would conform to the results reported below. Here's the top ten years (5+ days in a year)
2010 1989 1985 1981 1977 1970 1958 1938 1935 1928 1927 1918 19081938 and earlier lead by a nose.
2010, oops, has the most at 12. May be we can find out why.
There's an old saying among the weather geeks: if you know where the jet stream is going, you know what the weather will be.
In general, may be. Here's a report from MIT (bastion of liberal bias), which describes how the northern jets are affected by climate change (global warming). In a nutshell: it's the historical overall temperature difference between polar air and mid-latitude air. The greater that difference, the jets move (more or less) in a circle around the North Pole at latitude well above the good old USofA. The jets don't fall south, allowing polar airmass to visit the lower 48. It's established that the Arctic is warming much faster than the rest of the planet. As the temperature difference narrows, the jets get hinky. The lower 48 gets uncomfortable. You can thank climate change.
NOAA's latest report. Why Ayatollah 49% Don© forgot to scrub this, I don't know. Get it before it goes.
The last 10 years are the 10 warmest on record in the Arctic.
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