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Severe Weather Sunday

posted Apr 8, 2011, 8:15 PM by Brian Donahoe   [ updated Apr 10, 2011, 1:55 PM ]
Sunday, April 10, 3:05 p.m. The forecast situation for Lake County has changed some since Friday, according to NWS forecasters. The strong "capping" inversion in our area is expected to limit the development of discrete thunderstorms and also inhibit the formation of tornadoes, and the greatest risk for dangerous severe weather this evening has moved to our north, across central Wisconsin. In northeast Illinois, there is abundant moist, unstable air at the surface and temperatures have risen into the upper 80s in many areas. Strong winds of 25 to 30mph from the southwest will continue this afternoon, with occasional gusts of 40mph or more possible. A cold front now located over Iowa and Minnesota will continue to move east, and thunderstorms are expected to develop along this front from central Minnesota southward into Iowa. Storms that develop along the front will move quickly to the northeast, bringing a moderate risk of severe thunderstorms and tornadoes to Wisconsin. As the front moves across our area, forecasters expect some scattered thunderstorms to move into or develop in the region. While widespread storms are not currently forecast for Lake County, any storms that form are likely to meet severe criteria, with the potential for damaging straight-line winds of 60 to 70mph and large hail of an inch or more in diameter. Weather Service forecasters also highlighted that while the risk of strong or long-lived tornadoes in Lake County has diminished greatly, it has not completely vanished, and people should be prepared to take appropriate emergency actions should a tornado threaten their community. Intense rainfall is also expected with any storms that move through the area, so localized street flooding is also possible.
 
The most likely timing for storms in Lake County is expected to be as the front crosses, probably between 8 and 11 p.m. this evening. It is possible that a few storms could develop ahead of the approaching front, and it is also possible that no storms will cross Lake County tonight. Since this is an evolving situation, we encourage you to pay attention to your local weather information. It is important to have a plan for actions you will take if severe weather threatens you, wherever you may be. As a reminder, alerting all-hazards NOAA weather radios are one important means of receiving storm, tornado, and other important emergency information. More information about weather radios can be found at the NWS website: http://www.crh.noaa.gov/lot/?n=nwr.

This message from Diana O'Kelly's Lake County blog.
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