Halloween Snowstorm Shatters Records - Recap

(2:00PM - 11/2/19) Post storm wrap up regarding the recent Tue-Thur, October 29-31st Halloween snowstorm that affected Northern and Central Illinois...

Two periods of snow occurred with this event, the first being Tuesday night-Wednesday morning and the second from Wednesday evening-Thursday afternoon. The first period of snow occurred in a narrow corridor across Western and Northern Illinois, producing upwards of 1-4" of snow. The second period of snow affected Northern and Central Illinois, producing widespread amounts of 3-6" across Northern Illinois, with locally higher amounts. 1-4" snowfall amounts were more common across Central Illinois.

Final storm snowfall totals, which includes both periods of snow, were 3-6" across much of Northern and Western Illinois, with locally areas of 6-9". Amounts tapered with southeast extend, to 1-4" across portions of Central and Eastern Illinois.

Below is a map representation of final snowfall totals across the state and adjacent areas. 

This snowstorm ended up shattering records for the snowiest Halloween across the state. Additionally, many areas ended up finishing with one of the snowiest Octobers on record, including featuring one of the snowiest October days on record.

​New records/2nd place in bold/italics.
.....Chicago.....
Snowiest October Days: 3.8" - 10/19/1989 & 3.4" - 10/31/2019
Snowiest Halloween: 3.4" - 2019 & 0.1" - 2014
Snowiest Octobers: 6.3" - 1989 & 4.6" - 2019
.....Rockford.....
Snowiest October Days: 5.0" - 10/23/1929 & 3.1" - 10/31/2019
Snowiest Halloween: 3.1" - 2019 & 0.1" - 2014
Snowiest Octobers: 5.0" - 1929 & 4.2" - 2019 
.....Moline.....
Snowiest October Days: 6.5" - 10/26/1967 & 3.1" - 10/31/2019
Snowiest Halloween: 3.1" - 2019 & T - 1954/1939/1926/1918/1917/1908
Snowiest Octobers: 6.6" - 1967 & 5.8" - 2019
.....Peoria.....
Snowiest October Days: 3.9" - 10/31/2019 & 3.3" - 10/23/1929
Snowiest Halloween: 3.9" - 2019 & T - 1918
Snowiest Octobers: 4.2" - 2019 & 3.3" - 1929
.....Springfield.....
Snowiest October Days: 2.6" - 10/29/1925 & 2.4" - 10/23/1929
Snowiest Halloween: 2.3" - 2019 & T - 1993/1951/1917
Snowiest Octobers: 2.8" - 1925 & 2.4" - 1929
.....Lincoln.....
Snowiest October Days:  2.7" - 10/23/1929 & 2.0" - 10/31/2019
Snowiest Halloween: 2.0" - 2019 & T - 1955/1930/1918
Snowiest Octobers: 2.8" - 1929 & 2.0" - 2019 
.....St. Louis.....
Snowiest October Days:  0.3" - 10/29/1913 & 0.2" - 10/23/1917
Snowiest Halloween: T - 2019/2017/1993/1954/1951/1905
Snowiest Octobers: 0.3" - 1913 & 0.2" - 1917

​JP

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