Surface Air Temperatures Winter temperatures are less severe when waters are open due to relatively warm surface waters Island temperatures are generally cooler warmer than the mainland in summer winter ID: 323217
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Slide1
Isle Royale LocalizationSlide2
Surface Air Temperatures
Winter temperatures are less severe when waters are open due to relatively warm surface waters
Island temperatures are generally cooler (warmer) than the mainland in summer (winter)
Comparison of average highs for Isle Royale (red) and
Kelliher
,
MN (blue)Source: http://www.weather.com/weather/wxclimatology/monthly/graph/USMI0431
Source: http://
www.epa.gov
/greatlakes/atlas/images/big03.gif
Comparison of average lows for Isle Royale (red)
Kelliher, MN (blue)Source: http://www.weather.com/weather/wxclimatology/monthly/graph/USMI0431
Isle Royale
Kelliher
, MNSlide3
Precipitation
Comparison of average precipitation for Isle Royale (red) and
Kelliher
, MN (blue)
Source:
http://www.weather.com/weather/wxclimatology/monthly/graph/USMI0431
The island generally receives less (more) precipitation during summer (winter) than the mainland
Source:http
://
www.wunderground.com
/blog/weatherhistorian/article.html?entrynum
=8
Isle RoyaleKelliher, MNSlide4
Lake Ice Formation
Warming surface water temperatures
Surface winds
modify ice location, form, and distribution
Warming surface air temperatures (winter and/or summer)
Increased mixing of water layers brings relatively warm deep waters (during winter) to the surface
Increased wind and wave action
Amount of ice cover from previous season - less (more) allows longer (shorter) period of absorbing solar radiation
Source: http://
www.epa.gov
/
greatlakes
/atlas/images/big03.gifSlide5
Extreme Events
The most extreme events have occurred in November when the weather transitions from fall to winter
Source: http://
www.wunderground.com
/blog/weatherhistorian/comment.html?entrynum=5
November 9-12 has had:
1) the deadliest late-season tornado outbreak in the north-central United States, 2) deadliest Great Lakes storm, 3) most intense frontal passage in United States history, 4) deadliest blizzard in Minnesota history, and 5) the 2nd most intense low pressure system on record for the Midwest (only surpassed by the event of October 2010).
Source: http://www.wunderground.com/blog/weatherhistorian/comment.html?entrynum=5Events are accompanied by drastic changes in air temperatures and/or intense amounts of precipitation falling