August. Winds were from the north early in the day and shifted around the south by late
in the day. Wind speeds were light, averaging 4.7 mph.
A cold front had moved through the region late on the previous day and was located in
southern Illinois. High pressure was moving sout h out of southwest Ontario. The
maximum temperature the previous day was 92 deg F, the warmest day in August. The
cold front brought much cooler temperatures on August 16. There was no rainfall that
day or the previous day. At O’Hare the maximum temperature was 77 deg F and the
minimum was 77 deg F. Winds were north in the morning shifting to east by evening at
an average speed of 9.5 mph
A high pressure system located over Quebec was providing southeast flow into the
region. A stationary front was located to the southwest over Missouri and another
stationary front was starting to move east as a cold front out of the plains. There was no
rainfall that day or the previous day. At O’Hare the maximum temperature was 85 deg F
and the minimum was 64 deg F. Winds were southeast at an average speed of 8.7 mph.
High pressure was located east over the Virginia/North Carolina border providing
southerly flow into the region. A warm front was located over Wisconsin and a cold
front was moving in from the west. There was no rainfall on this day but some scattered
precipitation occurred the previous morning. At O’Hare the maximum temperature was
85 deg F and the minimum was 67 deg F. Winds were from the south all day at an
average speed of 9.4 mph.
High pressure was located over Missouri providing westerly flow into the region. A cold
front had moved through the area the previous day with rainfall amounts around 0.25 in.
There was no precipitation on this day. Winds were west to northwest most of the day
shifting to east by evening. Winds speeds averaged 8.5 mph but were stronger prior to
the wind shift.
A cold front had moved through the area the previous day and was located in southern
Illinois. A second cold front was moving southeast into northern Wisconsin. Scattered
showers occurred throughout the Chicago area with rainfall amounts above 0.5 in. At
O’Hare the maximum temperature was 73 deg F and the minimum was 44 deg F. Winds
were light and variable until afternoon when a shift to the northeast occurred. The
average speed was 6.0 mph but was higher after the wind shift.
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