We’ve an impressive late September heatwave with many major cities including Chicago recording their longest string of 90s so late in the season as well as the latest ‘hottest day of the year’. The heat is one thing but the level of chill coupled with heavy snowfall is major the spread of winter vs summer all the more extreme.
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https://twitter.com/NWSRiverton/status/912230898216636416
From weather.com
Traverse City, Michigan, reached 95 degrees on consecutive days Friday, Saturday and Sunday, topping the previous record latest-in-season 95-degree-plus high in the northern Michigan city by one full week (Sep. 15, 1939).
Burlington, Vermont, had its record latest high in the 90s Sunday, topping the previous record by over a week (Sep. 16, 1939).
The previous day, Milwaukee, Wisconsin also recorded their record latest-in-season 95-degree-plus high, also previously set on Sep. 15, 1939.
Other daily records Sunday were set in Augusta, Maine (87), Concord, New Hampshire (91), New York City (91), Pittsburgh (90), and Springfield, Illinois (94). Several Midwest and Northeast locations Sunday were hotter than the Desert Southwest.
Highs in the 80s and 90s, threatening more daily record highs, are possible from the Great Lakes to the Northeast the next few days.
By Monday, however, the first sign of cooler conditions will begin to move into the Plains as the pattern shift begins.
From NWS Chicago
Credit: NWS Chicago
Record Late Season Heat: Facts and Numbers
Public Information Statement National Weather Service Chicago IL 201 AM CDT Mon Sep 25 2017 /301 AM EDT Mon Sep 25 2017/ ...Record Late Season Heat Numbers... Late September 2017 is seeing near to record warmth across a sizable portion of the Midwest, including northern Illinois and northwest Indiana. Following are climatological numbers to put this ongoing late season heat into perspective. ************************************************************** CHICAGO Records date back to 1871. Date 2017 High Record High 2017 Low Record Warm Minimum -------------------------------------------------------------- 9/20 92* 91 (1931) 62 73 (1931) 9/21 94* 92 (1970) 72 76 (1931) 9/22 94* 92 (1956) 71 73 (1895) 9/23 95* 91 (1937) 72* 71 (1891) 9/24 93* 91 (1891) 70 71 (1930) 9/25 90 (1933) 76 (1931) * = Record 2017 has seen the latest 90+ since 2007 (Sept 24). Latest 90+ degree reading on record: Oct 6, 1963 (94) Latest 95+ degree reading on record: Sept 29, 1953 (99) There has never been a heat wave of this duration and magnitude this late in the season in Chicago. Chicago has not recorded 5 consecutive days with high temperatures 92F+ this late in the year. The previous latest streak of 4+ days in a row of 92F+ was Sept 16-19, 1955. In addition, this is the latest Chicago has ever recorded 3 days in a row of mid 90s (94F+). The previous record for latest 3+ day streak of mid 90s was back on Sept 13-15, 1927 and also the same dates in 1939. Saturday`s high temperature of 95F tied for the hottest day of 2017. This sets a record for the latest in the year that the hottest temperature of the year was recorded in Chicago. Previously, the latest in the year that the annual high temperature occurred was Sept 14th back in 1893, 1915, and also 1927. The daily average temperature on Sept 21 was 83 degrees, which ties for the warmest daily temperature on record after the midpoint of Sept (Sept 21, 1931). ************************************************************** ROCKFORD Records date back to 1905. Date 2017 High Record High 2017 Low Record Warm Minimum -------------------------------------------------------------- 9/20 91 92 (1920) 63 74 (1895) 9/21 89 94 (1920) 69 70 (1895) 9/22 92 93 (1937) 67* 65 (1959) 9/23 93* 92 (1937) 66^ 66 (1920) 9/24 90 92 (1920) 65 70 (1930) 9/25 95 (1920) 69 (1972) * = Record ^ = Record Tied 2017 has seen the latest 90+ since 2010 (Oct 9). Latest 90+ degree reading on record: Oct 9, 2010 (90) Latest 95+ degree reading on record: Sept 25, 1920 (95) Latest stretches of 3+ consecutive days of 90+: 1. Oct 2-5, 1922 2. Sept 24-26, 1920 3. Sept 22-24, 2017 The latest in the year that the annual high temperature occurred: Sept 15, 1927 (99) The highest temperature in 2017 has been 94 on June 11 and 12. For more, please see weather.gov/chicago and click on Climate and Past Weather.
Big change coming!
Credit: weather.com
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