2007 was a very memorable year in the weather department in
what turned out to be the sixth wettest year in La Crosse history. Throughout the year the La Crosse municipal
airport received 41.69 inches of precipitation. It was the wettest year in
quite some time as you would have to look back to 1991 to find a year with more
precipitation. Precipitation is what led to some of the most memorable weather
events of the year. With the help of the National Weather Service, below is my
listing of the top ten weather events of 2007.
10. December 1 Winter Storm
After the eighth driest November in La
Crosse, December started off with a bang. The first
snow storm of the 2007-2008 winter season occurred during the first weekend of
December and produced treacherous conditions that made driving difficult. The
storm system started in the Rockies before pushing into the central Plains and
eventually the Midwest. Initially the storm
brought heavy snow which made for quick accumulations, but warm air advection
from southerly winds caused the precipitation type to change to sleet by the
early afternoon. The temperature at the surface was still in the mid to upper
20s, but warm air aloft caused the precipitation to fall in the form of sleet.
The warm air mass continued to push northward and by the evening temperatures
pushed near the freezing mark. At this point the precipitation became less
widespread but on and off freezing rain fell in La Crosse. Most areas ended up reporting
between 3 and 6 inches of snow and sleet accumulation. In most cases a quarter
of these totals were from sleet alone! The freezing rain arguably had the
biggest impact on the area. Our station is located on top of the bluffs in La Crescent and the
roads were more slippery than they were during the largest snow storm in La Crosse history which occurred
last February. Believe it or not, it was so slippery on December 1 that some
road crews were even pulled off the roads. The snowy start to the month was
just an introduction to what became the fifth snowiest December on record.
9. Drought 2007
While it was the sixth wettest year in La
Crosse history, drought developed this summer. During
June and July, up to 4" precipitation deficits produced moderate drought
conditions across west central and central Wisconsin. Conditions became even worse by
August for southeast Minnesota
when a moderate to severe drought developed. Record rains eventually alleviated
the drought in southeast Minnesota and west
central and central Wisconsin but moderate
drought continued in north central Wisconsin till mid October.
8. February Cold and Wind Chills
It is hard to think about winter, without thinking about cone chilling
temperatures. That was the case last February as cold weather and wind created
dangerously low wind chills for the area from February 2 - 5. The lowest wind chill recorded during the
period was -42F at Monona, IA and Medford, WI. It was so cold that on February 4th
the areas high temperatures were below zero. It was the coldest start to
February since 1996 and the month eventually became to coldest February on
record since 1989. Temperatures throughout the month generally ran around 8 to
9 degrees below zero.
7. December 22-23 Winter Storm
This storm should be fresh in your mind as it caused all sorts of traveling
problems for the holiday weekend. A cold front passed through the region during
the afternoon of Saturday, December 22nd. Snow picked up and became
heavy by the evening and snowfall rates reached 1 to 2 inches per hour. Snow
totals were the highest near the Mississippi river and across western Wisconsin. By Sunday
evening snow reports in La Crosse were as high
as 14 inches and 11.4" officially fell at the La Crosse airport making it the 6th
largest December snow storm on record. Aside from just heavy snow, winds became
increasingly strong on Sunday. At higher elevations and in open areas blowing
snow produced drifting and near white out conditions.
6. February 28 - March 2 Winter Storm
This storm marked the second major winter storm in less than a week as it followed
the largest snow storm in La Crosse history. The second storm dropped anywhere between 6 and 12 inches of snow
throughout the News 19 Viewing area. Blowing and drifting snow was again a
problem as many roads were closed. Snow wasn't the only issue with this storm,
up to a quarter of an inch of ice in some locations made travel nearly
impossible.
5. July 17 - 18 Flash Flooding
Not much of the area will remember this storm but areas struck by the storm
had stories to tell that will go on for years to come. During the evening of
July 17th, thunderstorms dropped nearly 10 inches of rain near Marquette, IA.
Flash flooding caused numerous mud and rock slides and debris flows. In Bagley, WI (Grant County)
flood waters collected in valleys and sent waves of debris into area bridges
and flood water were backed up into the community. Fifty people had to be
rescued from their homes and around 400 homes were damaged in the village. The
storm caused plenty of financial headaches… railroad tracks were washed out which
caused damages over a million dollars.
4. June 7 Severe Weather
On June 7th supercell thunderstorms developed which caused wind
damage and large hail. 37 warnings were issued as a result of the event which
produced up to baseball sized hail in Rockland and Bangor.
Hundreds of cars were damaged at car lots in West Salem.
This was the same storm that also produced the largest tornado in Wisconsin for 2007 in
the northeastern portion of the state. That tornado caused a very impressive
line of damage which was viewable from satellite images.
3. August Rainfall
Numerous rainfall records were set in Au