The Michigan Department of Natural Resources and Environment have declared Wednesday as a Clean Air Action Day for Allegan, Berrien, Cass, Kalamazoo, Kent, Livingston, Mason, Muskegon, Oceana, Ottawa, St Joseph, and Van Buren counties. This means that you should avoid activities which lead to ozone formation. Such activities are refueling vehicles or topping off when refueling, using gasoline powered lawn equipment, and using charcoal lighter fluid. Positive activities include car pooling, biking to work, delaying or combining errands and using water based paints. It is recommended that active people, and people with respiratory diseases (for example, asthma) limit prolonged times outside. There is also a Heat Advisory until midnight Wednesday Night for Berrien, Branch, Cass, Hillsdale, Livingston, Midland, Shiawassee, and St Joseph counties. Highs on Wednesday will be in the low to mid-90s, with heat indices (how hot it feels) in the upper-90s to near 100 degrees. With dewpoints and low temperatures in the low to mid-70s, it will feel very hot and humid.

Monday, June 6, 2011

Severe Weather Possible Tonight

The Storm Prediction Center has included areas north and west of a South Haven to Lansing line in a Slight Risk of Severe Weather tonight.


Storms are expected to push into the area between 8 PM and 4 AM, after developing in Wisconsin. They'll have an east-southeasterly movement. Here's a look at CAPE (Convective Available Potential Energy) and LI's (Lifted Indices), measuring instability. Although the best numbers are on the other side of the lake, they're fairly decent here, with CAPE around 2000-2500 j/kg and LI's around -5 to -7.
NAM CAPE forecast valid 00 UTC Tue 07 Jun 2011

NAM PLI forecast valid 00 UTC Tue 07 Jun 2011

Damaging Winds and Large Hail are the primary risk, as noted by the Storm Prediction Center's risk for these two severe threats. I've just posted the hail, as the risk looks the exact same for hail/wind, at least in our area.

There could also be some locally heavy rainfall. Stay tuned to the latest from our Facebook page and the broadcast room if severe weather does occur.

~ Forecaster Ben Kouch
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