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Significant Flood Threat Continues For South-Central U.S.

A widespread and significant flood risk continues across the south-central U.S. from repeated rounds of intense rain and strong to severe thunderstorms. Flash flood watches are in effect for large part of the ArkLaTex. Today's concern extends from the Louisiana and extreme Upper Texas Gulf Coast to northeastern Texas and southeastern Oklahoma before shifting to all of eastern Texas on Wednesday. Read More >

St. Patrick's Day Weather for Northern Illinois:   Statistics for Chicago and Rockford

 

Chicago:
The following statistics comprises 146 years of data. However snowfall data started in 1885 so it comprises 134 years. Data collection began at the University of Chicago, then at Midway, and currently at O'Hare which is now the official station for Chicago.

 

Graph of high temperatures on St. Patricks Day in Chicago

Frequency distribution of high temperatures for Chicago. This dataset shows that the most common range of high temperatures is 40-49 degrees, followed closely by 30-39 degrees. The normal high temperature at Chicago is 47 degrees, which falls in one of those ranges. The record high temperature on St. Patrick’s Day is 82 degrees set in 2012 . The record lowest high temperature on St. Patrick’s Day is 11 degrees, which occurred in 1941. In 2018, the high temperature was 46 degrees.

 

Graph of Low Temperatures in Chicago on St. Patrick's Day

Frequency distribution of low temperatures for Chicago. This dataset shows that the most frequent range of low temperatures on St. Patrick’s Day is in the 30 to 39 degree range. The normal low temperature at Chicago is 29 degrees which falls just below that range. The record low temperature for Chicago on St. Patrick’s Day is -1, which was set in 1900. The record highest low on St. Patrick’s Day is 58 in 2012. The low temperature in 2018 was 30 degrees.

 

Graph of Precipitation at Chicago on St. Patrick's Day

Frequency distribution of precipitation for Chicago. This dataset shows that the most frequent amount of precipitation recorded on St. Patrick’s Day is 0.00”, which accounts for 47% of the days in the dataset. The next most frequent range is a Trace closely followed by the 0.02” to 0.25” range. The highest amount of precipitation on St. Patrick’s Day occurred in 1965 when 1.42” of precipitation fell. This is the only instance of over an inch of precipitation on St. Patrick’s Day. There was a trace of precipitation in 2018.

Graph of Snowfall on St. Patrick's Day in Chicago

Frequency distribution of snowfall for Chicago. This dataset shows that the most frequent amount of snowfall recorded on St. Patrick’s Day is 0.0”, which accounts for 66% of the days in the dataset. The next most frequent range is a Trace, followed by 0.1” to 0.9”. The highest amount of snowfall recorded on St. Patrick’s Day occurred in 1984 when 4.1” of snow fell. In 2018 a trace of snow fell.

 

ADDITIONAL ST. PATRICK'S DAY CLIMATE DATA     ( * MEANS LAST OCCURRENCE)

MAX TEMP
WARMEST

MIN TEMP
WARMEST
PCPN
WETTEST
SNOW
MOST
82
2012
58
2012 
1.42
1965
4.1
1984
74
2009 *
49
1894 
0.82
1919
3.7
1904, 1965
73
2003 *
48
2011
0.59
1991
2.7
1993
68
1945
44
1927 
0.51
1904
67
2011 * 
43
1945
0.49
1998
64
1968 *
42
1999 * 
0.47
1946
63
2010 *
41
2009 *
0.45
1980
62
2000 *
40
2016 *
0.37
1930
60
1927
39
1919 
0.35
1973
59
1999 *
38
1918 *
0.32
1989
 
MAX TEMP
COLDEST
MIN TEMP
COLDEST
PCPN
DRIEST
SNOW
LEAST
11
1941
0
1900
0.00
* 2016
0.0
* 2016
15
1902
1
1941
T
*2018
T
* 2018
23
1939
3
1902
0.01
* 1970
0.1
1892, 1930
1988, 1996
24
1875, 1885
1892
6
1885
0.02
* 2008
25
1967
9
1875
0.03
1921, 1922, 1938, 2017
26
1900
11
1939
0.04
1874
27
1906
12
1906, 1993 
0.05
1903, 1979, 1986 
28
1876, 1916 
13
1967
0.06
1960, 2005
29
1959, 1993
14
1909
0.07
2004 
30
1887, 1893
1960
15
1876, 1877
0.11
1882

 

ACS 3/16/2019