||September was a notably warm month this year.
Temperatures in Green Bay were about 5.5° F higher than the long-term
average for September. Precipitation was average for the month (3.07
level in High Falls reservoir on the Peshtigo River has been
drawn down dramatically to facilitate maintenance on the dam. Large
areas of the lakebed are now exposed.
||Ilex verticillata (winterberry
holly) is at about the peak of its fall fruit display.
||Flocks of Canada Geese are prominent
in Green Bay now. We see them every day and at night they can be heard
in large numbers on the East River.
Turkeys seem to be unusually numerous his year in northeastern
Wisconsin, and they also apparently are becoming less wary of people.
Water level in the
Wisconsin River is extremely low, as shown in this photograph
of one channel (of two parallel channels around an island) near
Portage Wisconsin. It is normal for water levels to fall at this
time of year, but this is much lower than usual. Water levels are
low throughout the state, but southern Wisconsin did not receive
the recent rain that fell in the north.
Fluctuating water levels can be inconvenient for boaters, but they
may be an important force in maintaining biodiversity on the rivers,
lakes and wetlands.
||Green Bay's low temperature today was 44°
F, the lowest since May 30.
Goldenrods are nearing the end of peak flower and they are the
most conspicuous feature of old fields in our area, as shown here
on UW-Green Bay's Cofrin Arboretum. The most abundant species in
the photograph is Solidago canadensis (Canada
goldenrod). An introduction
to goldenrods with links to photos of common species is
Brief, but strong thunderstorms moved through Wisconsin
in the late afternoon and evening. In northeastern Wisconsin peak
winds of about 70 mph were recorded. Green Bay had numerous broken
and wind-thrown trees and downed power lines. About 13,000 homes
lost power, and some were still without electricity the following
morning. The rain was welcome though with amounts ranging from about
one-half inch to 2 inches (0.95 inch in Green Bay).
||Warm temperatures and low precipitation totals
are taking a toll on the vegetation. In Marinette and southern Florence
Counties I noted numerous trees with colored, brown or fallen leaves.
Fraxinus nigra (black ash) is quite susceptible to late
summer droughts. Some black ash swamps were dry enough to walk in
in street shoes and many trees had already lost most of their leaves.
Many individual trees of various species, perhaps those that are in
poor health or most severely water stressed, are turning color quite
early and Pteridium aquilinum (bracken
fern) has turned brown already in some areas.
||Green Bay's high temperature of 90° F
is considerably higher than the average of 71°.
||Flocks of Geese are prominent in the fields
Aster novae-angliae (New England Aster) and Solidago
speciosa (showy goldenrod) are now in flower on the UWGB
Campus. These are among the latest plants to flower in our area.
Green Bay received 0.38 inches of rain.
||Some whitetail deer bucks have already shed
the velvet from their antlers.
||Flocks of shorebirds are notable on Green
Bay and elsewhere in our area as migrating birds from farther north
are passing through.