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For DCA, the record low (dating to 1872) in every month except August, due largely to station location. The March record high of 93F from 1907 comes next as the highest March reading since 1946 was 89F. The only precipitation records I think nearly impossible to crack are the trace in October 1963 and the driest year, 1930. Due to UHI, not strength or path of Nor'easters, I feel the single-storm snowfall from the Knickerbocker Storm also belongs in this list.
IAD's monthly record lows, even though from a POR dating only to 1962, Jan, Feb, and May thru Nov look implausibly extreme to be matched. I doubt whether it will ever see zone 5 temps again.
For Portland, OR, July 2009 was pretty incredible. But, with temperatures rising, that could happen again. January 1950 will NEVER happen again.
Same here. January 2009 was impressive up here with 105F (41.5C) being recorded on Vancouver Island. Many new records were set along the ocean similar to that, but nothing compares to January 1950. As a matter of fact, I was looking at a climate site the other day that flags errors in the climate database, and they flagged January 1950 as an error... for every single weather station that I looked at. Ya, like all the weather stations are going glitch all at the same time in the same direction!
Good question... perhaps record low –43.0 °C from January 1940. That is almoust same as whole Estonian record low -43.5 °C (at Jõgeva, 17 January 1940)
But an absolutely unbreakable weather record is the 0.0 mm precipitation from August 2002
Here in Charleston, I'd say the snow storm we had on November 21, 2006 (with thunder snow!) would have to be high on the list. It could happen earlier, but it is hard to get snow here in January, let alone November with the higher sun angle.
I'd also say that the lowest maximum high we've ever had, 20F during our rare Christmas 1989 snowstorm is safe. There's nothing within six degrees of that.
I say all temperature records but one can be broken in Chicagoland. Collegeville Indiana 50 miles outside the city of Chicago recorded a state record max temp of 116F/47C July 1936
I don't think this precipitation record can easily be broken either. Not for the city of Chicago it's self, but for the western suburbs. Aurora (29 miles from MDW) in July 1996 heaviest 24 hour rainfall total in Illinois history 17 inches (432mm) recorded.
Quote:
2nd highest 24 hour rainfall in the nation’s history, outside of hurricanes
Most of monthly lowest temps are unlikely to get broken in large cities due to urbanization.
On the other side, there are many old high temps that are likely to remain as records due to lack of standarization of the stations, as long as the series of data are not revised (forever thank you Australian BOM for erasing that absurd record from Cloncurry).
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