Jim Kosek

Decatur

Chief Meteorologist at WAND-TV (Decatur, IL)

Award-winning WAND Chief Meteorologist; Penn State Alum. Dallas Cowboys, pizza and hot weather fan.

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Articles

Heavy Storms Set To Return This Holiday Weekend

5 days ago | wandtv.com | Jim Kosek

(WAND) - It's been a waiting game and a hurry-up game today. As farmers hurry to get more crops planted before several rounds of rain and/or severe weather, a stout cap on the atmosphere has kept us wondering when will storms erupt. A powerhouse elongated cold front from the western Great Lakes to Texas will arrive during the wee hours of Saturday morning. In advance of this front, thunderstorm initiation has been few and far between.
Heavy Rain, Thunderstorms Set To Strike

6 days ago | wandtv.com | Jim Kosek

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Where Does Wind Come From

1 week ago | wandtv.com | Jim Kosek

(WAND) - I once posed the question, "where does wind come from?" to a second grade class studying weather. The consensus answer: the sky. They weren't completely off-base. Wind is generated by the movement of air from areas of high pressure to areas of low pressure. This movement is primarily caused by the uneven heating of the Earth's surface by the sun.
Northern Lights could be spotted across parts of central Illinois tonight

1 week ago | wandtv.com | Jim Kosek

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Northern Lights Chances Tonight

1 week ago | wandtv.com | Jim Kosek

(WAND) - To answer the question of will we see the Aurora Borealis, we first have to visit the latest CME (Coronal Mass Ejection). This is a significant release of plasma and magnetic field from the solar corona—a part of the Sun's atmosphere. When a CME collides with the Earth's magnetosphere, it can disturb the magnetic field surrounding Earth, leading to geomagnetic storms.
Virga, Or Not To Virga

1 week ago | wandtv.com | Jim Kosek

(WAND) - Virga. We saw it today on doppler radar, but what is virga? It's a meteorological phenomenon that refers to precipitation that evaporates or sublimates before it reaches the ground. Typically associated with rain or snow, virga often appears as streaks or wisps that hang from clouds but remain suspended in the air. While virga may not contribute to surface moisture, its presence can indicate that rain or snow is falling from the clouds.
Is April's Full Moon Really Pink?

1 week ago | wandtv.com | Jim Kosek

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The Joys Of...Spring?

1 week ago | wandtv.com | Jim Kosek

(WAND) - For Spring allergy sufferers, the joys of warmer weather, birds chirping and flowers blooming come at a price. Itchy nose and eyes, breathing difficulties and skin allergies can set in as trees begin to pollinate. While tree pollen season begins in February or March in Illinois, it doesn't peak until May. Because pollen is microscopic, we cannot see it in the air and often do not know when the season has started until symptoms begin.
Showers Return To The Forecast; Rain And Meteor

2 weeks ago | wandtv.com | Jim Kosek

(WAND) - Showers return to central Illinois, and not just in the form of rain. April is the time of the year for one of the oldest recorded meteor showers; the Lyrids. Originating from the comet C/1861 G1 Thatcher, the Lyrids are visible each year around April 16 to April 25, with peak activity this year on Monday night, April 21. The Lyrids can produce around 20 meteors per hour at their peak, making them a modest yet exciting display.
Shed No Threat 'Til April Is Dead

2 weeks ago | wandtv.com | Jim Kosek

(WAND) - The title of this article is an old proverb that reminds us that April is quite the fickle month, and your Winter sweaters shouldn't be put away just yet. The latest push of Canadian chill has already crossed the border and will settle in tonight. A clearing sky and little to no wind will combine with this air mass to allow a thick blanket of frost to form. This shouldn't come as a surprise to area gardeners as the average last frost is about a month away.