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scott_b
01-30-2008, 04:17 PM
John,

Yesterday in the northern burbs of Chicago we had a huge swing in temps. According to our weather station at 4:00pm it was 48.5 deg at 4:30am -4.5deg and 30+ mph winds (-47.5 wind chill). Question is in the grand scheme of things is a 50+ deg temp change in 12 hours a big deal, possibly record breaking or not such a major event?

1000
01-30-2008, 05:09 PM
I am not answering for John, but I think I remember that the largest swing in a 24 hour period is 100 degrees somewhere in Montana. I think it was 60 to -40. But again that is in 24 hours, not 12. I am sure John will chime in with further iofo.

gobuckeyes
01-30-2008, 09:53 PM
John,
along the same line of Scot b's question, do wild temp swings always result in the high winds we experienced last evening?
-Scott

average_joe
01-31-2008, 12:03 AM
Good memory 1000.

The link I had to that info has changed. (http://www.wrh.noaa.gov/tfx/tx.php?wfo=tfx&type=html&loc=text&fx=topweather) See #8 for 12 hr.

I did find some info that Loma, MT now holds the record (http://www.ncdc.noaa.gov/oa/climate/monitoring/extremes/reports.html) at a 103°F swing, from -43°F to 49°F.

Scott, Twice in 25 years for Chicago - see Jan. 29 entry (http://blogs.trb.com/news/weather/weblog/wgnweather/)


existing records (scroll down) (http://www.ncdc.noaa.gov/oa/climate/monitoring/extremes/ncec.html)

Rest up John. Busy weekend

admin
01-31-2008, 11:03 AM
Thanks for the help everyone. Things are busy and I am a bit slow on the draw to respond right now.

-John

scott_b
01-31-2008, 03:03 PM
Average Joe,

Thanks for the info. What key word did you use to find the NWS sites? I had done a few searches prior to posting this.

average_joe
01-31-2008, 11:48 PM
Scott,
I use the search box provided on the NWS, NOAA, or NCDC websites. For something like this I would put in <font color="0000ff">greatest temperature change</font> or <font color="0000ff">extreme weather</font>. They are great places to start surfing. Learn to read the URL&#39;s that are provided in the results.

I also like to use domain-specific and U.S. Government searches through Google™&#39;s advanced searches. I avoid using the regular Google™ search engine since it usually has too much commercial site results. I want reliable sources.

I&#39;ve just started using USASearch.gov (http://usasearch.gov/). It seems to give some interesting results. I like it better than Google™.

I usually read T.S.&#39;s weather blog daily. Tom and Frank usually come up with some interesting facts.

Happy surfing.
Joe