3-1 -7-9

2 이 10 5 3-14-14-12-20-17

12 5 2 9 2 10
4-14-13-13-18-19

11 5-2 10 - 21 12
0-14-12-10-15-17 7-15
8-2 9 0 10 16 15
8-10-10-18-15

41 27 21

26 7 7

46 2:31 22

Minimum... 17 12 10

19

- 8

-

20 1

35 33

Maximum

8 14 30 26 11 3 1 10 2 10 15 10 24 37 40 5-15-15-14-18-20

20

.....

7051

5

Minimum.... 21

5 5

34 33

Dixon.

Rockford

Minimum.... 29 2

Minimum..

2-19

1 2 6-5 8 13 13 22 39 38 20-2-12-17-19-20-23-22

34 27 12 2 1 12 0 13

Minimum... 25
Maximum
Minimum..
) Maximum

Minimum....27

29

1

16

6

1-15-12-10-14-18

-

6-24

7

21 8

13 14 26 40 41
4-18

7 21 10 14
-9-11

17 23 33 41 44

2-11-12

23 20 29 22 21 28

13 13 23
5-15-15-14-20-20 4-18 5 18
10-5-1 10-6 15 15 23 36
9-14-16-10-18-18-12-18

12 3 5 13 0 15 15 19
2-14

2 8-3 11 14 13

17 15 28 40 44

39 41 39

15 14 25

22

Minimum... 22

이

11

Minimum... 21

07-17-16-20-19-20
22 14 6 10 8 14

2-2

8 6-11-13 -4-14

.

6 9 12 24 21

20

0-13

18 20 26 36 32 24 21 24 27 27 30 30 27 30 29 32 24 16.2 45 41 46 45 45 40 44 55 52 46 43 40 36 39 40 40 35.2 20 22 26 36 26 23 28 28 29 31 30 29 43 44 45 44 40 44 40 48 55 53 38 41 36 36 42 41 39 33.8 36 33 28 25 26 33 40 36 37 38 42 46 38 37 35 29 24 23 23 29 27 31 30 38 39 42 42 43 38 40 39 46 52 48 36 50 21 20 33 34 30 26 26 26 30 31 27 42 44 41 43 40 39 41 48 55 51 47 53 23 24 29 31 28 26 26 26 32 25 33 27 41 40 37 40 38 42 36 431 46 47 38 35 17 14 29 35 31 25 25 23 30 26 27 28 4 45 48 50 48 43 39 46 55 25 21 31 29 33 27 26 27 32 42 41 39 41 41 42 18 15 27 30 33 23 22 38 41 40 42 37 40 38

41 38 38

42 42 38 40 38
21 22 30 35 31 25 26
41 35 45 43 39 40 41
17 17 26
35 31 25 23

35 32 23 22

37 39 38 40 36

16 15 26 34 29 25 21
41 44 41

44 40 41 39

20 24 30 33 29 25 25 25

47 44 38 43 41

36

26 27 29 29 28

35

47 44 38 35
28 26 29 29 27
56 52 42 47 43
30 33 29 27 27
53 50 43 40

32 35

19.7

40 42 37 30.9

30 34 24 14.3

34 37 40

29 32

42 40

28.8 12.1

32.3

31 29 35 22 15.6

39 36 38 42 39 33.6

34 34 36 38 25 18.1

29 32

34

28.6

13.3

43 41 30 31.0

27 28 31 31 30 20 14.0

38 46 49 43 39 38 37 37 37 41 37 30.5
28
30
28
13.7

47 45 40 36 35 36 38 38 36 30.0

27 28 28

15 18 25 33 29 24 24 22 22 27 29
43 49 47 41 43 38
231 32 31
40 48 42
22 31

40 37 37

30 35 31 29 29 29 33 25 15.5

39 39 46 56 55 43 52 48 37 42 42 41 35.4 36 36 26 30 38 30 28 29 32 29 35 24 19.5 49 46 53 63 58 59 58 41 38 45 42 41 41.2 26 26 28 28 39 31 28 30 33 25 37 24 19.5 45 55 48 40 49 41 40 58 60 51 54 48 41 43 43 47 39.8

30

33

18.6

29 30 30 29 33 31 35

27
35

44

45 39

36 33.2

27 31 29 34

16.6

29 29

29 36

41 35.7 19.3

29 29 33

29

36 39 36 30.8

9 26 20 31 21 20 29 40 33 26 23 27 29 40 35 27 32 32 26 33 26 20.3 32 46 46 46 49 44 48 52 42 43 42 44 58 62 52 44 45 40 42 42 45 38.8 8 24 17 30 18 27 14 39 32 21 16 23 22 24 31 28 24 33 29 33 27 17.3 34 47 47 46 51 49 54 49 42 46 42 48 60 57 52 56 45 39 47 42 41 39.1 13 28 20 30 22 23 30 35 33 26 24 36 32 42 31 26 29 33 28 36 26 19.8 35 49 45 49 48 45 53 48 43 47 43 47 57 58 54 56 40 41 44 48 31 39.0 11 27 21 32 21 24 29 32 27 27 25 29 28 37 27 24 32 28 27 35 23 18.8 14 14 19 33 44 44 43 46 45 46 50 42 42 42 47 57 52 49 54 38 40 45 46 36 36.0 7-10 -12 13 25 17 30 21 21 27 33 28 26 25 26 27 31 28 24 29 32 26 36 21 17.2 30 43 44 44 47 42 52 47 37 41 41 40 56 59 43 44 37 38 41 39 40 922-1930 19 18 24 36 32 2520 25 27 32 32 30 30 32 29 32 25 35 48 49 46 51 50 49 48 44 45 44 51 63 55 54 60 43 39 46 45 39 39.3 14 17 27 30 19 22 30 34 32 27 24 30 26 37 28 25 29 32 28 39 24 18.8 31 42 44 41 45 45 43 41 43 40 44 49 57 50 50 56 49 35 45 41 37 34.8 13 27 20 30 24 25 32 32 26 25 26 27 30 35 28 29 28 32 30 35 23 17.8 32 45 45 45 49 48 47 49 43 42 42 50 59 56 52 56 45 45 40 38 37.6 14 28 20 30 22 22 29 33 32 28 25 35 30 36 29 26 29 32 27 35 24 19.3 35 50 46 50 48 45 56 48 42 47 43 49 60 63 51 55 43 39 44 47 50 40.9 20 32 21 20 24 34 33 26 24 27 26 31 31 28 35 33 26 31 23 19.6 22 17 25 17 341 46 45 46 50 46 52 48 43 45 41 47 58 56 52 55 48 42 43 42 42 39.4 2-10 5 8 12 27 20 33 20 23 30 36 32 25 25 27 32 41 32 24 30 31 27 36 24 20.5 22 14 33 46 45 47 50 44 55 46 42 47 41 44 57 62 49 50 39 38 41 41 41 38.5 22 20 25 39 33 261 23 26 30 35 32 28 32 33 26 33 26 19.6 3 14 16 32 41 42 41 45 45 47 49 40 40 39 47 57 51 41 52 35 38 42 43 32 33.8 9-10-7-11 14 27 21 25 23 21 30 35 31 27 26 27 29 34 28 2 30 33 30 32 18 17.3 14 16 16 24 37 46 48 44 48 48 48 50 44 44 46 52 61 60 56 54 47 37 47 45 37 38.4 56 0-10 33 26 25 26 26 30 32 31 29 29 46 41 41 43 47 58 49 50 55 32 29 27 27 28 28 35 30

35.8

18.3

33 28 36 25 18.9

20 25 25 36 32 26 26 28 30 34 33

38 45 45 35 36.3 31 28 34 24 18.5 39 44 42 34 37.5 33 29 34 23 20.6

16 27 20 30 23 25 30
45 50 49
45 44 48 57 54 52 57 41
28 32 35 34 29 28 30 34 42 32 26 31
48 43 52 48 39 41 39 42 56 56 47 48 41 38 41 40 40 36.3
27 30 33 29 33 25 19.3
49 50 50 45 45 45 52 61 54 55 56 53 38 45 44 40 40.0
30 26 38 24 19.1

18 32 21 20 28 33 30 26 25 27 25 35 30 26 29

20 15 18

20842

5-1

20

202-2

26 201

10

22 12 34

46

이

- 5

7- 2 12 32 30

28 17

36

28 21 37 49 48 50 49 47 56 48
6-8 7 26

31

23

50 53

31

33

50 51 49 58 50 46

33 26 29 31

33

49

56

27

61

26

30

58 50

25 27 30 42 33 28 26

50 46

30 26 36 26 29 30 41 30

59 51 47 48 49 52

61

33 32 30 33 34 45
45 47

46 49 60 63

27 39 31 26

25 27 30 37

50 45

28 32 32 26 24 27 28 37 31

52 49 48 44

47 32 31 29

57 52 47 48 48 51 64 63 62

28 41 33 28 27 30

27 39

48

30 37 33 25 26! 30 25 34 36 48 59 52 48 45 47 49 61 66

48 47 48 52 62 68 63 61

46 57 47 44 45 44 51 61 64 63 60 45 401 46 44 48 231 28 30 40 32 27 27 31 28 35 27 31 55 60

24 32 44 30 27 23 31 31 40

54 50 52 54 50 48 48 51 66 68 62 60
30 31 32 33 45 40

65 65 59 50 39 49 54 45 42.5 34 33 321 38 35 48 42 39 32 32 32 42 30 25.9 47 47 50 60 66 63 58 47 38 48 53 38 41.9 34 34 31 27 38 26 23.0 60 53 40 45 47 49 42.2 26 34 31 24 33 25 20.1 58 49 39 47 43 44 41.5

60

29

32 30 30 25 35 25 19.9

52 62 67 62 63 51 40 49 50 52 44.6

30 28 42 34 30 36 32 25 36 27 22.0 54 40 47 47 46 43.7 33 30 25 38 26 21.8 53 40 47 49 51 43.2

28 35 32 24 36 27 20.2

62

37 35 28 27

52 40 46 48 51 43.2 35 28

21.8 41.2

34

29 25 31

28 21.0

46

38

49

50 43.8

32

33

48 37 48 47 50 43.5 34 31 25 40 27 23.5

i

NOTES EXPLANATORY OF PRECEDING TABLES: Departures of temperature and precipitation with 15 years or more of record are computed from a normal or standard mean", adjusted to a uniform 40-year period for temperature, and a 35-year period for precipitation; for stations of 10 to 14 years the means for the period of record are used. All complete records, except with reference, are used in determining division and State averages. Except as otherwise indicated, observations are generally made in the late afternoon, near sunset, and temperature and precipitation recorded are for the 24 hours ending at time of observation. 1 First-order Weather Bureau Station; temperature and precipitation are for the 24-hour period, midnight to midnight. It Data for 24 hours ending at 12:30 a. m., C. S. T. 2 Precipitation is measured in the morning; amount then recorded is for the preceding 24 hours. Precipitation measured with recording gage; daily periods ending with midnight. Included in the next measurement. T.. Trace, or precipitation less than, 01 inch. Incomplete monthly record. † Also on subsequent dates. Values in italics, interpolated from surrounding stations. // Gage equipped with windshield. (WBO, Springfield, Ill., 2-20-42-1310)

APR 2 1942

9

VOL. XLVII

U. S. DEPARTMENT OF COMMERCE, WEATHER BUREAU

CLIMATOLOGICAL

ILLINOIS SECTION

E. W. HOLCOMB

PRICE: 5 CENTS A COPY; 25 CENTS A YEAR

SPRINGFIELD, ILL., FEBRUARY, 1942

GENERAL SUMMARY

DATA

max. temp. on 12th, 89°, mean max. temp., 85.2°, Cairo, daily min. temp. on 27th, 70°, mean min. temp., 71.30. September 1941: p. 50, Bloomington, mean temp., 70.4°; p. 52, New Boston, daily precip. on 2d, T; p. 54, Cairo, daily max. temp. on 17th, 87°. October 1941: p. 56, Moline (airport), mean temp., 55.6°; p. 57, Springfield (airport), mean temp., 58.8°, Carbondale, mean temp., 63.7°; p. 59, West Frankfort, daily precip. on 14th, 2.03. Moline (airport), daily max. temp, on 17th, 56°, on 23d, 65°, mean max. temp., 65.8°, Carbondale, daily, max. temp. on 15th, 67°, mean max. No. 2 temp., 73.5°. November 1941: p. 62, Moline (airport), mean temp. 41.6°; p. 66, Moline (airport), daily max. temp. on 7th, 37°, on 18th, 71°, on 22d, 38°, on 23d, 27°, mean max. temp., 50.0°, daily min. temp. on 10th, 24°, on 17th, 46°, on 22d, 26°, on 23d, 15°, mean min. temp., 33.30. December 1941: p. 67, monthly snowfall, (1941), 2.6; p. 68, Moline, snowfall 4.5, Rockford, mean temp., 34.10; p. 69, Palestine, mean temp., 39.0, Harrisburg, date lowest temp., 7t, monthly snowfall (State), on 18th, none, on 25th, T., on 26th, 0.9, on 27th, T., on 30th, 2.1, on 31st, 0.3, total 2.6; p. 71, Moline (airport), daily snowfall on 8th, T., on 10th, T., on 12th, 1.2, 4,5; p. 72, Rockford, daily min. temp. on 13th, 26°, mean min. temp., 27.1°, Palestine, daily min. temp. on 24th, 36°, mean min. temp., 30.6°. Annual 1941: p. 75, Rantoul, snowfall, 16.8.

While this month was not so cold as February 1941, it was one of the five coldest Februaries since 1923. Sub-normal temperatures occurred on the 1-3d, including sub-zero readings in a few northern localities. A period of comparatively mild weather characterized much of the period from the 4th to 16th in most areas, with daily mean temperatures ranging from 12° to 18° above normal on the 4th to 6th. A reaction to colder occurred between the 17th and 21st, resulting in the lowest temperatures of the month; however, sub-zero readings were restricted to northern areas and were not extremely low or of long duration.

There was a high average of monthly cloudiness and the percentage of possible sunshine for the month ranged from 12% below the normal at Springfield to 17% below at Chicago, 19% below at Cairo, and 20% below at Peoria.

PRESSURE, WIND, HUMIDITY, AND SUNSHINE DATA
Atmospheric pressure (reduced
Relative

Stations

Cairo....

Mean

to sea level)

30.07 30.40
30.09 30.42
30.09 30.41

30.40

Wind

humidity

7:30p.m.CWT

Percentage of

sunshine

6 9.1
10.3
29.34 6 7.0 21 n.
29.24 6 7.3

ne. 6

6 86 87 77 83 39

COMPARATIVE FEBRUARY DATA FOR THE STATE

Temperature

The month was unusually wet for February in all sections of the
State with the exception of the extreme north. Snowfall was consider-
ably above the normal in most areas and rainfall was unusually heavy
in most sections of the State. Comparatively, State precipitation for the
month was the greatest of February record since 1909, and one of the Chicago..
four heaviest in the past 53 years of Illinois climatological history. In Peoria
the northern division it averaged 155% of normal, in the central divi- Springfield 30.07
sion 198% of normal, and in the southern division 151% of normal. At
Peoria precipitation was one of the four heaviest amounts for February
in 86 years; at that station a total of 3.17 inches in a little more than 18
hours on the 5-6th exceeded all previous records for any of the cold
months excepting March; at Springfield 2.03 inches, which was recorded
on the 4th, was the greatest 24-hour amount of February record since
1883, while several other stations including La Harpe, Fairview, and
Warsaw registered all-time 24-hour maxima for the month on the 6th,
and La Salle the greatest 24-hour amount excepting in February 1939.
Heavy precipitation in the Illinois River watershed caused overflow of
lowlands on the 6th, disrupted river traffic, and forced abandonment of
some homes. Light sleet occurred at a number of stations throughout
the State on the 6th, in localities of the south on the 9-10th, and of the
central and south on the 16-17th and 23d-24th.

Weather conditions were largely favorable for winter wheat and 1893.
other winter crops. The substantial precipitation during the early part
of the month together with smaller amounts in the latter half of the
period largely maintained wet surface conditions and caused inter- 1897
ference with normal field work; on the other hand sub-soil moisture 1898
reserves at the end of February were generally greater than for several 1900
years past. Condition of winter wheat at the month's close ranged from 1901
poor to good, being least favorable in localities of the south; some dam-1902
age was caused in areas by freezing and thawing; many plants were small
because of late seeding. Condition of livestock was generally satisfactory. 1905

0.34 0.30 1.14 0.51 3.8

1890

35.8

2 1.78 2.38

8

1891

32.1

-13

1.82 2.95 4.06 2.87

2.9

10

1892.

35.2

3

1.39 3.33 3.52 2.77

1.9

10

6

10

7.5

71 -16 2.26 2.03 1.80 2.05 6.6
69 -29 1.57 2.14 2.94 2.16
5.3

62 -16 1.47 1.25 1.05 1.27
-19 2.00 2.93 3.97 2.89 8.9

70 -19 3.43 4.73 3.76 4.09 14.7 11
70 -20 1.43 1.58 2.00 1.63 9.8
3.0

6

1904

23.4
19.2

68 -32

-19 1.34 1.26 2.35 1.55 6.0
1.72
1.52 1.66 1.62 12.4
2. 17 2.02 2.44 2.17 5.7

65 -13

1910.

1911

1912

1913.

26.2 68
34.9
23.4
26.7

7 -24

78 - 9
-24

3.07 4.27 6.70 4.48 12.6
2.86 4.13 5.89 4.16 5.9
0.89 1.76 3.59 1.93 8.4
2.43 2.00 2.63 2.28 7.2
1.23 1.69 2.85 1.83 12.0

72 -18 1.92 1.63 1.31 1.64 6.9
0.85 2.42 4.35 2.40 13.2

-14

0.26 0.66 1.11 0.64 1.2

26.2 65
30.7

4 1.16 1.29 -15

1.91 1.40 0.6

12

70

0.84 1.04 2.78 1.40 2.7
6 1.50 1.66 1.52 1.58
8 2.00 1.50 2.44 1.88 2.4

6.5

33.7 67

4 1.80 1.45
4 1.46 2.34
0.69 0.76

1.02 1.46 2.4

1

0.49 1.46
1. 13
1.33 1.76 1.37 2.3
0.95 1.38 2.23 1.45 5.7

2.08 1.31 0.2

7

12

STORM DAMAGE (Amounts Estimated)

1935

Light to moderate hail, with little or no damage reported, occurred as fol- 1936
lows: 4th, Barry, Carlinville, Waterloo; 5th, Edwardsville, Sparta; 6th, Grand 1937
Tower. Marshall.
LIGHTNING: 5th, Sherman, corn crib burned, $3000.

1938

34.0 76
19.2
29.7
39.0

71

-28 0.53 0.85 1.41 0.89 7.7
-10 1.70 1.47 1.14 1.46 1.8
-24 1.47 2.12 1.90 1.87 7.0 8
7 1.30 1.44 1.88 1.50 2.9
4 2.04 2.37 2.96 2.41 3.2

5

7

1939

July 1941: p. 41, Shawneetown, daily precip. on 9th, none. August 1941: p. 43, central div. precip. (1911), 2.76; State precip. (1941), 2.76; p. 44, Aurora, mean temp., 72.6°; p. 45, Tuscola, total precip., 4.33, central div. precip., 2.76, State precip., 2.76; Period....... 29.7 p. 47, Tuscola, daily precip. on 25th, 3.07, total precip. 4.33; p. 48, Aurora, daily

3 2.13 3.16 5.20 3.33 6.5
-13 1.00 1.12 3.58 1.67 5.8
-10 0.86 0.63
4 2.34 3.76

10

0.84 0.75 3.4
3.86 3.34 6.8

Precipitation for the State averaged 3.34 inches, which is 1.41 inches above 1917. normal. Monthly totals ranged from 5.86 inches at Shawneetown to 0.47 inch at 1918 Galena. Amounts were above normal throughout the State except the extreme north, embracing the area from Jo Daviess, Carroll, Whiteside, and Rock Island 1920 counties northeastward to Lake and DuPage counties. Departures ranged upward 1921 to more than 3 inches above normal in localities of Woodford, Fulton, Cass, and 1922 Pike counties. The greatest amount within a 24-hour period was 3.17 inches at 1923. Peoria on the 5-6th. 1924

Natural History Library

Pike.....
McLean..
McLean

740
444

1 3.94

1.70 12.0

41 4.58 +3.11 +14.05 1.89 9.0
+7.04 1.26 5.2
1.76

11

467

2 4.52

Fulton..

655

2 4.14

Carlinville.

Casey...

Chandlerville
Charleston

Clinton ...

Danville.

Clark....
Cass...
Coles

Macoupin

Decatur...

Effinghamit.

Dewitt...
Vermilion
Macon...
Effingham.

51 4.59 +2.65
53 3.38 +1.30
2 5.17
2 19 62 3.55
32 3.90
2 19 42 3.00
3 19 54 3.45
3 19 44 2.99
30 4.70
8 2.69

Golden....

+2.51+10 23 46 2.88 +0.93 +5.92

Gridley.

5 1960

1.83 10.5 11 4
1.83 4.6
+7.212.23 9.6
+5.34 1.07 4.5
2.05 7.9
+1.53 +4.15 1.06 5.3
+2.16+11.91 1.76
9.7 12 3 1 24 se.
+1.20 +3.97 0.85 6.4 8 12 7 9 11.
+1.54 +8.28 1.72 6.3 10
nw.
+0.89 +4.29 1.02
5 21 nw.
+3.10 +12.56 2.82 11.7 10 5 9 14 nw.
1.07 8.0
4 14
1.77
0.74 4.0 12
1.30 5.0 5
4.86 +3.25 +13.60 1.90 19.0 13
2.94
0.78 6.6
+2.69 +13.93 1.80 11.9 11 8
+1.30 +4.90 1.19 9.3 13
+1.76 +4.84 1.80 4.2
+2.49 +12.45 1.65 8.0
0.72 9.0

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