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Observations by Gary Fewless for Green Bay WI (Lat.N 44.51° Long. W 88.02° ), except as noted. For flowers lacking conspicuous petals or sepals I define "anthesis" as release of pollen by mature anthers.

October 2010 Mouse-over the photo for the identity of the subject
Forest County Oct 3, 2010

Oct 31

Green Bay's average temperature was about 2.8° F above "normal" for October. The highest temperature was 79° on Oct 8 and the lowest was 28° on Oct 22. Precipitation was about average. Here's a graph comparing daily high temperature between 2009 and 2010, with the "normal" high. Note that the high temperature was never exactly equal for any date between the two years and that no date for either year was exactly equal to the "normal" high for that day.

Tom Erdman reports Tundra Swans back on Green Bay's West shore today. They pass through spring and fall in migration.

Oct 27

The storm reported below over the last couple of days has been declared the most powerful non-tropical storm in U.S. history.

The sustained strong winds (avg winds over 20 MPH for two full days, peak 52 in GB) and very low pressure to the north contributed to a very low water level in lower Green Bay. This photo shows the large area of lakebed exposed adjacent to UW-Green Bay's Cofrin Arboretum.

The magnitude of the water level change during the recent storm is impressive. From the high point on October 25 at 07:18 CDT (06:18 CST) to the low point at 9:36 a.m. CDT on October 27, the water level fell 3.9 ft., from 578.22 ft to 574.32 ft.

Sherwood in Calumet County reported wind gusts as high as 79 MPH today. It has been estimated that 60,000 homes are still without electrical power tonight.

Oct 26

As predicted, a very strong low pressure system moved into Wisconsin today, setting a record low for atmospheric pressure for the state. A pressure of 28.38 inches, or 961.06 millibar was recorded at Superior WI. The previous record was 963.43 millibar set on April 3, 1982 in Green Bay. The storm that sank the Edmund fitzgerald in 1975 only reached 980 millibar.

The strong low pressure brought high winds to Wisconsin and extending through many nearby states. the town of Sherwood (Calumet County) reported the highest winds I am aware of, with peak gusts of 76 MPH. Green Bay recorded a peak gust of 52 MPH, Algoma 68, Sheboygan, 68Manitowoc 64, Kewaunee 63 .

Numerous power outages were reported in northeastern Wisconsin from trees blown over onto power lines.

Oct 25 A very strong low pressure system in Canada (±960 mb, comparable to a class 3 hurricane, I'm told) is expected to produce a strong cold front through Wisconsin tonight and tomorrow. Very strong winds are predicted, with gusts to 50-60 mph.
Oct 23 We are used to seeing "wild" turkeys in the field near our house in Allouez, but today during the rain they came right into our front yard providing an opportunity for a close photo through the window. Green Bay received 0.66 inches of rain.
Oct 22 Green Bay's morning low temperature of 28° F is the lowest of the season to date.
Oct 21 There are a few examples of buck "rubs" on trees in northern Wisconsin, in advance of the seasonal "rut".
Oct 19 Only 0.28 inches of rain in Green Bay this month so far and none since a trace on Oct 2. Temperatures have also been unseasonably warm with 15 of the first 19 days in the 60's (10 days) or 70's (5 days).
Oct 12

Unseasonably warm for the last week or so with many high temperatures in upper 60's F or even in the 70's.

Here's a view of the Cofrin Arboretum's Prairie Pond from this morning.

Oct 11 The tall prairie grasses are about at their peak the Cofrin Arboretum.
Oct 8 Green Bay reached a high temperature of 79° F today. Very warm for the season.
Oct 6 Green Bay reached a high temperature of 74° F today, after a morning low of 39°.
Oct 5 Another frost this morning, though not as hard as yesterday.
Oct 4

Frost in Green Bay this morming. The weather station at Green Bay reported 34° as the morning low temperature. Last year the first frost was Oct 1 and in 2008 it was Oct 4.

Here's a Great Blue Heron in Green Bay off the UWGB shoreline today.

Oct 3

Hard and widespread frost in northern Marinette County. Frost on red raspberry leaves.

Laona and Hiles in Forest County and Florence in Florence County each reported morning lows of 27° F. I think they had frost there as early as Sep 19, certainly in the lower areas.

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Last updated on May 20, 2015