biodiversity homepage      

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 2011 Mouse-over the photo for the identity of the subjectstaghorn sumac

Oct 31

October 2011 was a relatively mild month. Green Bay's daily temperature was 4.2 degrees above "normal" and three days reached a high temperature of 81° F (Oct 6,7 and 8). Total precipitation was 1.66 inches, which is 0.78 inches below average.

Deciduous forests north of the City of Green Bay have lost most of their leaves (as here near Laona, Forest County). A small number of trees still bear some leaves and the Tamaracks (Larix laricina) still have their needles, even as far north as Forest County. In the City of Green Bay and near the Bay there are still leaves on some species. Most prominent among the trees still bearing leaves are the oaks (mainly Quercus alba, Q. ellipsoidalis, Q. macrocarpa, Q. rubra) and the invasive species European buckthorn (Rhamnus cathartica) and glossy buckthorn (Rhamnus frangula). Also Norway maple (Acer platanoides) and Silver maple (Acer saccharinum) still have leaves in some areas and there are some leaves on upper branches of quaking aspen (Populus tremuloides).

Oct 30 This is the third consecutive day that the low temperature reached 29° F. Green Bay also received 0.14 inches of rain today.
Oct 28 Green Bay's morning low temperature was 29° F, our lowest temperature since April 21.
Oct 25 The U.S. Weather Service station at Green Bay reported a trace of snow today, the first of this Fall.
Oct 24

There are still many Canada Geese in our area, as seen here on the Lake Michigan shoreline in Manitowoc County. There were even a few Monarch butterflies around on this sunny day.

Green Bay reached a high temperature of 60° F.

Oct 23 Inspite of frosty mornings the weather has been mild and we still have Great Blue Herons and Great Egrets in our local pond. Also saw 7 swans along the East River today.
Oct 22 Frost yesterday and today in Green Bay area. Green Bay's morning low temperature was 31° F today.
Oct 20

Another windy day in Green Bay, with light rain in the morning, as seen here from the shoreline of UW-Green Bay's Cofrin Arboretum. Persistent winds of 15-30 miles per hour out of the N and NE for the last 24 hours have resulted in higher water in the southern end of Green Bay.

A sunset behind UW-Green Bay's Laboratory Sciences building. The photo is exactly as taken with absolutely no processing except to reduce the size for the web. The incredibly bright sunset lasted for only a few minutes, and it just happened to be during my walk to the parking lot.

Oct 18 Another windy day in Green Bay with winds averaging 18 + mph and gusts to 30.
Oct 17

Some locations have lost most of their leaves in the Green Bay area, as here at Baird Creek Park. However, where there are more resistant species such as this northern pin oak (Quercus ellipsoidalis) on UW-Green Bay's Cofrin Arboretum, the canopy is still quite leafy. Other trees with persistent leaves include silver maple (Acer saccharinum), Norway maple (Acer platanoides) and especially the invasive species European buckthorn (Rhamnus cathartica) and glossy buckthorn (Rhamnus frangula), both of which often keep their leaves into November.

The moon has been visible in the morning sky as welll as later in the night sky the last couple of days, as here today at 10:30 a.m. (D.S.T.) as seen from UW-Green Bay.

Oct 16

Another windy day with gusts to 43 mph in Green Bay. The landscape looks much different than it did just a few days ago, now that many leaves have fallen in these sustained winds.

Large numbers of migrating White-throated Sparrows and Juncos with smaller numbers of White-crowned Sparrows and a few Fox Sparrows, Oconto county, Town of Pensaukee (Tom Erdman).

Oct 15

A very windy day in northeastern Wisconsin, winds averaging 18 mph with gusts to 40. Many leaves came off the trees today.

Here's an interesting wild fruit from an uncommon (alien) shrub in our area, European spindle-tree (Euonymus europaea). The fruit is a red-purple capsule, that opens at maturity to expose several bright orange seeds. The soft orange covering of each seed develops from the aril, a structure which is small and virtually invisible on the fruits of many plants. Here's the fruit of another species in the same family, bittersweet (Celastrus scandens). The structure is similar, but in this case the capsule is orange and the seed is red.

Oct 12 With today's high temperature of 76° F, Green Bay has set a record for most consectutive days with high temperature above 70° F. Four of those days were 80 or 81
Oct 11

Warm, sunny weather continues, high temperature of 79° F. In addition to the many Canada Geese now in our area I am still seeing Great Blue Herons, Great Egrets, and Sand Hill Cranes in the wetlands along the East River.

Below is a wide photo covering a full circle in Mahon Woods in the Cofrin Arboretum at UW-Green Bay. If you click here you will get a photo 4 times as large (400 pixels high). Click on that photo to get full height, and then use the sliders to move left or right to see the entire photo.

uwgb woods full circle

Oct 10 October proceeds with warm days and still no precipitation for the month.
Oct 09

Here is another conspicuous Fall fruit in our area, high-bush cranberry (Viburnum trilobum). The common name is misleading and it is not a cranberry at all.

Another warm day with a high temperature of 79° F and it was still 60° at midnight.

A record high temperature of 81° F was set today for Rhinelander Wisconsin. Several other communities in northeastern Wisconsin also set record highs, including Antigo and Wausau at 79°.

Oct 08

Today's high temperature of 81 is the fourth consecutive day of 80° F or higher in Green Bay (80, 81, 81, 81). That is about 10-15 degrees above the average high temperature for these dates and we are averaging about 8° higher than the average for the month.

If my math is reliable, this is the 140th anniversary of the catastrophic fire at Peshtigo Wisconsin (Oct 8, 1871).

Oct 06 Sunny warm weather continues, providing great opportunities for a walk, as here at Baird Creek in the City of Green Bay.
Oct 04 As the leaves turn color and fall, some fruits are maturing, as here on nannyberry (Viburnum lentago) at UW-Green Bay.
Oct 03 Great weather continues. Sugar maples (Acer saccharum) are at about peak color in forest County, though there are differences from one location to the next and trees within full canopy forests are not so far along.
Oct 02

Another great Fall day, This time with temperature reaching 69° F in Green Bay. Here's a photo from farther north, with a mix of deciduous and evergreen trees.

Green Bay's low temperature was 31° F, Our first official temperature below freezing this Fall and out lowest temperature since May 4.

Oct 01 A beautiful Fall day in northeastern Wisconsin and leaves are about peak color for my taste, though the media usually marks the peak a week of so later when all leaves have turned.

© 2001-2004 The Cofrin Center for Biodiversity and the University of Wisconsin Green Bay, All Rights Reserved
Last updated on May 20, 2015