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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.

December 2007

Dec 27 Green Bay received 2 inches of new snow since yesterday morning. The snow was "sticky" and covered the trees on UW-Green Bay's Cofrin Arboretum. Many tall grasses were pressed down (lodged) by the weight of the new snow.
Dec 24 No new snow today, but the Green Bay weather station reports 7 inches of snow on the ground. Rhinelander, about 100 miles NW of Green Bay, is reporting 13 inches of snow on the ground.
Dec 23 Another warm day early, but temperatures fell off rapidly as a cold front moved through and a snow storm dropped 6.4 inches of snow. Temperatures fell to 13° F in Green Bay with average wind for the day 18 mph and gusts to 31. The storm was narrow in extent. Rhinelander received 8.0 inches of snow, Oshkosh only 2.0 inches, Madison 2.8 inches, Marquette, Michigan 0.6 inches.
Dec 22

Warm air moves into northeast Wisconsin and daytime temperatures reach 42° F in Green Bay. The snow cover declines rapidly, assisted by 0.24 inches of rain.

The winter solstice occurs at 06:08 am today in the northern hemisphere. The winter solstice is the time at which the sun reaches its lowest angle below the equator, and the entire day in which this occurs is also popularly referred to as the winter solstice. The day containing the solstice is essentially the shortest day, but the changes in sunrise and sunset are not symmetrical around the solstice and the rate of change is at its minimum so the change in day length on either side of the solstice is only a matter of seconds for the few days on either side. In Green Bay the latest sunrise is about January 2nd or 3rd, 2008 (rounded to the nearest minute both days sunrise are at 7:29 am). The earliest sunset was about Dec. 9, 2007.

Dec 20

There are abundant animal tracks in the Mahon Woods portion of UWGB's Cofrin Arboretum, including those of deer, cottontails and gray squirrels. The deer and squirrels are also digging vigorously in the snow under oak trees.

A high temperature of 37° F has begun to melt our snow cover. The temperature fell only to 35° at 6:00 pm and then rose to 37° until midnight, as a mass of warm air moves in from the south.

Dec 19 The National Weather Service is predicting below "normal" temperatures and slightly above normal precipitation for the next month.
Dec 18

The high temperature of 34° F in Green Bay today is the first day that we have risen above freezing since December 2, with the single exception of a brief period of 33° on December 13. Temperatures have been about 4.7° below average ("normal") for this time of year. Precipitation is about average for December to this date.

People hae been eager to get out in the snow as seen by the numerous tracks near on this trail near Prairie Pond on UW-Green Bay's Cofrin Arboretum.

Dec 13

Here's a better perspective on the ice cover of Green Bay, from the top of the Niagara escarpment in Brown County Park (about Lat 44.637 Long. 87.801), looking about NW. The only opening I could see was a narrow path broken by a commercial ship entering or leaving the port of Green Bay at the mouth of the Fox River (not visible in this photo).

Dec 11

An automated monitoring station recorded one or more Big Brown bats active on the UWGB campus today, and on other days of November and early December (Bob Howe). The high temperature was -2° C (29° F) and the low was -6° C (22° F). We knew bats sometimes emerged from hibernation during winter warm periods, but this is a little outside of the normal envelope, although activity for some bats has been reported as low as -8° C in the literature. This type of information is one of the benefits of the network of bat monitoring stations currently being implemented in Wisconsin [gf].

At mid-day a large storm stretches from Texas through Oklahoma, Kansas, Missouri and Iowa, through southern Wisconsin and northern Illinois into Michigan and New York. The precipitation is mostly rain in Texas, Oklahoma and Kansas and snow in Wisconsin north of Milwaukee (none yet in GB). Much of the area between the two is some sort of freezing rain or sleet.

Most of lower Green Bay is now ice-covered. No open water can be seen (from ground level) from UWGB.

Dec 10 Judging by reports from area birders, the consistently cold weather has brought much larger numbers of birds to local feeders, compared to December of last year.
Dec 06 Green Bay high temperature is 23° F and the low is -7°. The "normal" low for this date is +17°. This is the coldest day of the season so far.
Dec 04 Green Bays high temperature of 26° F and low of 17° makes for a very cold day.
Dec 02 The remanants of yesterday's storm added another 0.4 inches of snow in the Green Bay area.
Dec 01

A big storm swept through the Great Lakes area, dropping 6.0 inches of snow in the Green Bay area. Rhinelander received 8.1 inches (including the final 1.1 inches that extended into early morning on Dec 2), Marquette, Michigan 9.7, Madison 6.3, Milwaukee 3.5.

Green Bay's low temperature of 7° F is the lowest of the season to so far.

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Last updated on May 20, 2015