Storms could bubble up as heat continues to increase

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ROCKFORD (WREX) – As heat continues to intensify, the potential is present for a scattering of strong to severe storms late tonight into early Wednesday morning.

A wide variety of weather headlines this morning. For those preparing to start your day, the weather is pretty quiet and the heat hasn’t gotten too bad. If you want to get that jog in for the day, the earlier the better. Things will heat up quickly once the afternoon rolls around, bringing me to the first big weather headline for the day.

Parts of the Stateline – including Carroll, Jo Daviess, Stephenson, and Whiteside Counties – will be under an excessive heat warning effective at 1 p.m. today. Heat index values to round out the week could be between 100° and 110°. Excessive heat can easily lead to heat-related illness.

Excessive heat warnings indicate that heat-related illnesses become likely if not taking the proper precautions when outdoors.

In DeKalb and Lee Counties, an excessive heat watch goes into effect tomorrow at noon. Heat indices will climb between 102° and 112° Thursday, Friday, and even possibly Saturday afternoon. The combination of hot temperatures and high humidity will lead to the potential for heat-related illness.

Excessive heat watches indicate the potential is there for heat-related illness if not taking the proper precautions outside.

For the remainder of the Stateline counties – including Boone, Ogle, and Winnebago – a heat advisory goes into effect tomorrow at noon. Heat index values Thursday and Friday afternoon could climb to between 101° and 109°, making heat-related illness possible.

Heat advisories indicate the potential is present for heat-related illness if not taking the proper precautions outside.
Heat was the number one weather-related killer in the U.S. in 2018. Know the signs of heat exhaustion before it’s too late.

Regardless of where you live in northern Illinois, the impact of this heat and the ways in which you respond will remain unchanged. Drinking plenty of water, take frequent breaks if outside, and know the signs of heat-related issues. This all may sound like common sense, but heat-related deaths are the number one weather killer in the United States (well ahead of other natural disasters like hurricanes and tornadoes).

Aside from the heat, there is also the threat for severe weather. This afternoon looks to remain mostly dry, aside from an isolated shower or storm that could develop along a lake breeze along and east of I-39. All attention in the weather department will turn toward a complex of thunderstorms that look to develop overnight. An approaching M.C.S. (Mescoscale Convective System) could bring the threat for damaging winds and large hail.

Strong to severe storms are possible, primarily between 11 p.m. and 5 a.m. Thursday.

The biggest storm threat moves in after about 10 p.m. and will likely linger through early Thursday morning. Current guidance bring in storms shortly after midnight, which means the worst of the weather will likely come through while many are asleep. Have a way to receive notifications if and when storms become severe. The 13 Weather Authority app is an excellent resource to have, especially in combination with a N.O.A.A. weather radio.

Thursday will likely start with a scattering of rain and possibly a few thunderstorms. By the afternoon, the weather will clear out and focus for the remainder of the week will be on the potentially dangerous heat.

Justin Ballard

Justin Ballard

Morning Meteorologist

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Alex Kirchner

Alex Kirchner

Alex Kirchner is the 13 Weather Authority's chief meteorologist at 5, 6 and 10 p.m. 

Tommie Owens

Tommie Owens

Tommie Owens is the meteorologist for 13 News Weekend.

Justin Ballard

Justin Ballard

Justin Ballard is the meteorologist for 13 News Today and 13 News at Noon.

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