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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.

September 2011 Mouse-over the photo for the identity of the subject
prairie grasses: big bluestem and Indian grass

Sep 29

Sandhill Cranes near Green Bay shore, Oconto County (Tom Erdman).

Very strong winds in northeastern Wisconsin tonight with gusts in excess of 50 miles per hour.

Sep 28 Between yesterday and today Green Bay received 2.18 inches of rain.
Sep 27 Wisconsin is caught in a large low pressure system centered to our south and east, stretching from Kentucky to Minnesota and revolving, as lows do, in a counter-clockwise direction. As a result rains are arriving from the east instead of the west. In between showers the air has been very hazy as shown here of a ship on Green Bay as seen from the west shore.
Sep 25 The annual cicadas are loud at this season, but they can be hard to see. Here's a photo of one from Allouez today.
Sep 24

Here's another characteristically late flowering species, Helenium autumnale (sneezeweed). It is typically found in wet and sunny sites.

The low temperature dipped down to 36° F this morning in Green Bay.

Sep 22

Rhus typhina (staghorn sumac) is very colorful now in the Green Bay area.

Aster novae-angliae (New England aster) is also very showy now, though there seem to be fewer than in recent years and they began to flower very late at UW-Green Bay.

Sep 20 One of the sights of Autumn in northeastern Wisconsin is the appearance of certain types of fungus. Here's a giant puffball (Calvatia gigantea) that was about 8 inches in diameter. They have been reported to over 5 times that large, though I don't recall ever seeing one larger than 12 inches here. DO NOT EAT WILD MUSHROOMS!!! Many people are tempted to eat the wild mushrooms, but this should not be attempted unless you are trained in mushroom identification through the use of technical characters--even then it is possible to mistake immature forms of some dangerous species for other species. There are numerous folk tales of how to tell "safe" mushrooms, but I have not yet heard any that are based on fact. There are numerous kinds of mushrooms, many of which are similar in appearance and there are no easy ways to recognize them without using the technical characters. Be safe.
Sep 18 This is the fourth day in a row of morning frost (or freeze) in parts of northeastern Wisconsin.
Sep 16

Light frost again this morning, including in my neighborhood in Allouez, despite the fact that temperatures as recorded at the Green Bay weather station were a little warmer than yesterday (38° today versus 36 yesterday). Last year the first frost in my neighborhood was Oct. 4.

Elsewhere this morning, Laona reached 29° F, Florence 26°, Eagle River 29°.

Sep 15 Green Bay's low temperature this morning was 36° F and the Green Bay office of the National Weather Service reported scattered frost at their GB station as well as in Ashwaubenon and Suamico nearby. This is the first frost of the year for Green Bay. Laona, about 100 miles north had a low temperature of 33°, as did Florence, and Eagle River reached 32°.
Sep 13

A little cooler this morning and a large cold air mass approaches from the north. Frost and even freezing temperatures are forecast for Thursday morning (Sep15).

Solidago canadensis (Canada goldenrod) is still robust and flowering profusely, but most of our normal Fall asters are present in very small numbers this year.

Sep 12

For the second consecutive day Green Bay's high temperature is 84° F--about 9 degrees above average for this date.

Most vegetation in the Green Bay area is still very green and robust. There are gathering flocks of birds to indicate the approaching Fall weather.

Sep 09

Heavy dew again this morning and even a little fog in some areas.

Another plant that tends to turn color early in the Fall is Parthenocissus vitacea (Virginia creeper), shown here in fruit.

The number of spider webs, or at least their visibility, also increases this time of year.

Sep 08

There were 5 or 6 mallards "dabbling" on a pond in UW-Green Bay's Cofrin Arboretum this morning--so busy they let me walk very close to take this photo.

There are still a couple of plant species that haven't begun to flower and in general the number of flowering Asters is dramatically lower than any time in my memory. However one of the chronically late species has begun to flower--Helianthus tuberosus (Jerusalem-artichoke) is just beginning.

Sep 07 A heavy dew in Green Bay this morning with a morning low temperature of 42° F between 7 and 8 a.m. Rhus typhina (staghorn sumac) is always one of the very first woody species to begin leaf color change in the Fall, as shown today on UW-Green Bay.
Sep 06

Cold air entered the state and there was scattered frost in various portions of northeastern Wisconsin today. Green Bay's morning low temperature fell to 39° F at 6 a.m. this morning. Laona fell to 35° F and Florence had a low temperature of 32° F.

We are beginning a period of fruit dispersal from our trees and shrubs, including these fruits from Fraxinus pennsylvanica (green ash) in UW-Green Bay's Cofrin Arboretum.

Sep 02 Thunderstorms with high winds in some portions of northeastern Wisconsin. Over 40,000 customers lost electrical power in the Fox valley due mostly to trees falling on the transmission wires. Green Bay received 0.61 inches of rain (plus another 0.66 inches after midnight and into the following day. The rain is a welcome addition for local plants.

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Last updated on May 20, 2015