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(12:45AM - 7/11/20) A disturbance moving through the region will bring the chance for severe t'storms to the state on Saturday.
Summary... A disturbance is expected the move through the region, Saturday through Saturday night. A few isolated showers or t'storms may be possible Saturday morning across portions of Northern and Western Illinois. Outside of this potential early day activity, clearing and destabilization will occur through the day. New scattered showers and t'storms will develop during the afternoon across portions of Southern Minnesota, Southwest Wisconsin, Eastern Iowa, Missouri and Northern and Central Illinois. This activity will then push southeastward across the the state in scattered fashion, Saturday afternoon into Saturday night. An environment will be in place across the state featuring low to moderate instability, decent moisture, decent forcing and decent shear. This will lead to upwards of a minimal severe t'storm threat across much of the state. With this update we have upgraded to upwards of a limited severe t'storm threat across Northwest Illinois and adjacent areas. Across this area a slightly better environment, as well as slightly better concentration and organization is now expected. Damaging winds, large hail and an isolated tornado will be the threats. Below is the severe t'storm forecast for Saturday morning - Saturday night. 
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(4:00PM - 7/10/20) The first heat wave of the year impacted the state and region, from the end of June through early July. Multiple days with high temperatures well into the 90's occurred, along with a few days of high humidity and heat indices.
Recap Summary... Things kicked off the week of June 29th, with widespread warm to hot temperatures across Northern and portions of Central Illinois. High temperatures across Northern and portions of Central Illinois generally ranged from the mid 80's to mid 90's. Across other portions of Central and Southern Illinois, repeated rain and t'storm activity kept temperatures cooler, in the upper 70's to upper 80's. The combination of high temperatures and high dew points lead to high humidity and heat index values for a few of the days. Heat index values in the upper 90's to mid 100's occurred across portions of Northern and portions of Central Illinois for a few days, during the early to early to middle of the week.
From Saturday-Sunday July 4-5th, high temperatures ranged from the upper 80's to mid 90's, with low temperatures in mid 60's to mid 70's across the state. Lower dew points helped keep humidity and heat index values in check during this time. From Monday-Thursday July 6-9th, high temperatures ranged from the low to mid 90's, with low temperatures in mid 60's to mid 70's across the state. Slowly increasing dew points lead to slightly higher humidity and heat index values during this time.
Below is a list of observed high/low temperatures during the June 29-July 9th period, from a few select locations across the state... 
(11:45AM - 7/10/20) A disturbance moving through the region will bring the chance for severe t'storms to the state on Saturday.
Summary... A disturbance is expected the move through the region, Saturday through Saturday night. A few isolated showers or t'storms may be possible Saturdayday morning across portions of Northern and Western Illinois. Outside of this potential early day activity, some clearing and destabilization will occur through the day. New scattered showers and t'storms will develop during the afternoon across portions of Wisconsin, Iowa, Missouri and Northern and Central Illinois. This activity will then push southeastward across the the state, Saturday afternoon into Saturday night. An environment will be in place across the state featuring low instability, decent moisture, decent forcing and decent shear. This will lead to upwards of a minimal severe t'storm threat across much of the state. Damaging winds, large hail and an isolated tornado will be the threats. Below is the severe t'storm forecast for Saturday morning - Saturday night. 
(9:30PM - 7/8/20) A disturbance moving through the region will bring the chance for severe t'storms to the state, Thursday into Thursday night.
Summary... A disturbance is expected the move through the region, Thursday through Thursday night. A few isolated t'storms may be possible Thursday morning across portions of Northern and Central Illinois. Outside of this potential early day activity, some clearing and destabilization will occur through the day. New scattered showers and t'storms will develop during the afternoon across portions of Wisconsin, Iowa, Missouri and Northern and Central Illinois. This activity, in the form of several clusters, will then push eastward across the Northern and portions of Central Illinois, Thursday afternoon through Thursday night. An environment will be in place across the state featuring moderate instability, good moisture, limited forcing and low shear. This will lead to upwards of a minimal severe t'storm threat across much of the state, potentially even a limited threat across Northwest Illinois where a somewhat better environment will exist. Damaging winds and large hail will be the main threats. Further south, more isolated activity will be possible across Southern Illinois Thursday afternoon into Thursday night, though an organized severe t'storm threat is not expected. Below is the severe t'storm forecast for Thursday morning - Thursday night. 
(8:30PM - 7/8/20) The region continues to be in the midst of a heat wave, with hot temperatures expected to continue for the few several days across the state...along with increased humidity and heat indices.
Forecast Summary.... The main heat wave will continue to occur this week through Friday, with high temperatures into the 90's across at least portions of the state during the remaining days of this period. However, some t'storm activity may be likely for some areas from time to time, which will temper the heat in a few areas at times. Additionally, dew points have increased over the past few days. The combination of high temperatures and increased dew points have lead to higher humidity and heat index values, upwards of the mid 90's to low 100's. Low temperatures across the state will continue to be in the mid 60's to mid 70's for most areas on a nightly basis. Thursday, July 9th Forecast... High temperatures ranging from the upper 80's to mid 90's across the state, with cooler temps expected in areas affected by more cloud cover and t'storms. Heat index values in the upper 80's to low 100's across the state. Periods of showers and t'storms will be likely across the state Thursday morning through Thursday night. Low temperatures in the low 60's to mid 70's across the state. Friday, July 10th Forecast... High temperatures ranging from the low 80's to low 90's across the state, with the hotter temps being across Southern Illinois and the cooler temps across Northern Illinois. Heat index values in the low 80's to upper 90's across the state. Low temperatures in the low 60's to low 70's across the state.
Recap Summary...
Things kicked off last week, with widespread warm to hot temperatures across the state. High temperatures across the state this last week generally ranged from the mid 80's to mid 90's...the exception being areas that had been impacted with t'storm activity. The combination of high temperatures and high dew points lead to high humidity and heat index values for a few of the days. Heat index values in the upper 90's to mid 100's occurred across portions of Northern and Central Illinois for a few days, during the early to early to middle of this past week. From Saturday-Sunday July 4-5th, high temperatures ranged from the upper 80's to mid 90's, with low temperatures in mid 60's to mid 70's across the state. Lower dew points helped keep humidity and heat index values in check during this time. From Monday-Wednesday July 6-8th, high temperatures ranged from the low to mid 90's, with low temperatures in mid 60's to mid 70's across the state. Slowly increasing dew points lead to slightly higher humidity and heat index values during this time. With all of that said, we continue with an overall low heat wave impact for this period. An update will be provided each day for the duration of this heat wave across the state. Each update will feature a recap of previous days temperatures, along with the forecast for the next two days, and any other overall additional information. 
(11:45AM - 7/8/20) A disturbance moving through the region will bring the chance for severe t'storms to the state on Thursday.
Summary... A disturbance is expected the move through the region, Thursday through Thursday night. A few isolated t'storms may be possible Thursday morning across portions of Northern and Western Illinois. Outside of this potential early day activity, some destabilization and clearing will occur during the day. Additional scattered showers and t'storms will develop during the afternoon across portions of Wisconsin, Iowa, Missouri and Northern Illinois during the afternoon. This activity, in the form of several clusters, will then push eastward across the Northern and portions of Central Illinois, Thursday afternoon through Thursday night. Further south, more isolated activity will be possible across Southern Illinois. An environment will be in place across the state featuring moderate instability, good moisture, limited forcing and low shear. This will lead to upwards of a minimal severe t'storm threat across most of the state, potentially even a limited threat across Northwest Illinois where a somewhat better environment will exist. Damaging winds and large hail will be the main threats. Below is the severe t'storm forecast for Thursday morning - Thursday night. 
(7:30PM - 7/7/20) The region continues to be in the midst of a heat wave, with hot temperatures expected to continue for the next several days across the state...along with increasing humidity and heat indices.
Forecast Summary.... The main heat wave will continue to occur this week through Friday, with high temperatures across the state likely to range from the low to mid 90's on a daily basis. However, some t'storm activity may be likely for some areas from time to time, which could temper the heat in a few areas at times. Additionally, dew points will slowly increase mid to late week. The combination of high temperatures and increasing dew points will lead to higher humidity and heat index values, increasing to the mid 90's to low 100's for mid to late week. Low temperatures across the state will be in the mid 60's to mid 70's for more areas on a nightly basis, and possibly a bit warmer in urban metro areas Wednesday, July 8th Forecast... High temperatures ranging from the low to upper 90's across the state, with cooler temps expected in Northeast Illinois near Lake Michigan. Heat index values in the low 90's to mid 100's across the state. An isolated and highly localized t'storm will be possible during the afternoon/evening across the state. Low temperatures in the low 60's to mid 70's across the state, possibly a bit warmer in urban metro areas. Thursday, July 9th Forecast... High temperatures ranging from the mid 80's to mid 90's across the state, with cooler temps expected in Northeast Illinois near Lake Michigan and in areas affected by t'storms. Heat index values in the mid 80's to mid 100's across the state. Periods of showers and t'storms will be possible across the state Thursday into Thursday night. Low temperatures in the low 60's to mid 70's across the state.
Recap Summary...
Things kicked off last week, with widespread warm to hot temperatures across the state. High temperatures across the state this last week generally ranged from the mid 80's to mid 90's...the exception being areas that had been impacted with t'storm activity. The combination of high temperatures and high dew points lead to high humidity and heat index values for a few of the days. Heat index values in the upper 90's to mid 100's occurred across portions of Northern and Central Illinois for a few days, during the early to early to middle of this past week. From Saturday-Sunday July 4-5th, high temperatures ranged from the upper 80's to mid 90's, with low temperatures in mid 60's to mid 70's across the state. Lower dew points helped keep humidity and heat index values in check during this time. From Monday-Tuesday July 6-7th, high temperatures ranged from the low to mid 90's, with low temperatures in mid 60's to mid 70's across the state. Slowly increasing dew points lead to slightly higher humidity and heat index values during this time. With all of that said, we continue with an overall low heat wave impact for this period. An update will be provided each day for the duration of this heat wave across the state. Each update will feature a recap of previous days temperatures, along with the forecast for the next two days, and any other overall additional information. 
(8:45PM - 7/6/20) The region continues to be in the midst of a heat wave, with hot temperatures expected to continue for the next several days across the state...along with increasing humidity and heat indices.
Forecast Summary.... The main heat wave will continue to occur this week through Friday, with high temperatures across the state likely to range from the low to upper 90's on a daily basis. However, some t'storm activity may be possible for some areas from time to time, which could temper the heat in a few areas at times. Additionally, dew points will slowly increase mid to late week. The combination of high temperatures and increasing dew points will lead to higher humidity and heat index values, increasing to the mid 90's to low 100's for mid to late week. Low temperatures across the state will be in the mid 60's to mid 70's for more areas on a nightly basis, and possibly a bit warmer in urban metro areas Tuesday, July 7th Forecast... High temperatures ranging from the low to mid 90's across the state, with cooler temps expected in Northeast Illinois near Lake Michigan. Heat index values in the low 90's to upper 90's across the state. Low temperatures in the mid 60's to mid 70's across the state, possibly a bit warmer in urban metro areas. Wednesday, July 8th Forecast... High temperatures ranging from the low to upper 90's across the state, with cooler temps expected in Northeast Illinois near Lake Michigan. Heat index values in the low 90's to low 100's across the state. Low temperatures in the low 60's to mid 70's across the state, possibly a bit warmer in urban metro areas.
Recap Summary...
Things kicked off last week, with widespread warm to hot temperatures across the state. High temperatures across the state this last week generally ranged from the mid 80's to mid 90's...the exception being areas that had been impacted with t'storm activity. The combination of high temperatures and high dew points lead to high humidity and heat index values for a few of the days. Heat index values in the upper 90's to mid 100's occurred across portions of Northern and Central Illinois for a few days, during the early to early to middle of this past week. From Saturday-Monday July 4-6th, high temperatures ranged from the upper 80's to mid 90's, with low temperatures in mid 60's to mid 70's across the state. Lower dew points helped keep humidity and heat index values in check during this time. With all of that said, we continue with an overall low heat wave impact for this period. However, we continue to monitor conditions for the potential for an upgrade to moderate heat wave impact. An update will be provided each day for the duration of this heat wave across the state. Each update will feature a recap of previous days temperatures, along with the forecast for the next two days, and any other overall additional information. 
(7:30PM - 7/5/20) A heat wave continues to settle in across the region, with hot temperatures and increasing humidity and heat indices expected across the state this week.
Things kicked off this past week, with widespread warm to hot temperatures across the state. High temperatures across the state this past week generally ranged from the mid 80's to mid 90's...the exception being areas that had been impacted with t'storm activity. The combination of high temperatures and high dew points lead to high humidity and heat index values for a few of the days. Heat index values in the upper 90's to mid 100's occurred across portions of Northern and Central Illinois for a few days, during the early to early to middle of this past week. For this upcoming week, the main heat wave will occur, with high temperatures across the state likely to range from the low to upper 90's on a daily basis. However, some t'storm activity may be possible for some areas from time to time, which could temper the heat in a few areas at times. Additionally, dew points will be on the rise early in the week, and then remain high mid through late week. The combination of high temperatures and high dew points will lead to high humidity and heat index values. Early week heat index values in the low 90's to low 100's are likely across the state, increasing to the mid 90's to mid 100's for mid to late week. Low temperatures across the state will be in the mid 60's to mid 70's for more areas on a nightly basis, and likely warmer in the mid 70's to around 80 for more urban areas, such as Chicago. There are signs that the heat could persist for portions of the state beyond this week, through next weekend (11/12th), and potentially beyond into the following week. However, confidence at that range greatly decreases, thus will not go too far into that potential for now.
Monday, July 6th Forecast...
High temperatures ranging from the upper 80's to mid 90's across the state, with cooler temps expected in Northeast Illinois near Lake Michigan. Heat index values in the upper 80's to upper 90's across the state. Low temperatures in the low 60's to mid 70's across the state. Tuesday, July 7th Forecast... High temperatures ranging from the low to upper 90's across the state. Heat index values in the low 90's to low 100's across the state. Low temperatures in the mid 60's to mid 70's across the state. With all of that said, for now an overall low heat wave impact is expected. However, as conditions for this week become more clear, an upgrade to moderate impact is likely. An update will be provided each day for the duration of this heat wave across the state. Each update will feature a recap of previous days temperatures, along with the forecast for the next two days, and any other overall additional information. 
(1:45AM - 7/5/20) A heat wave continues to settle in across the region, with hot temperatures and increasing humidity and heat indices expected across the state this week.
Things kicked off this past week, with widespread warm to hot temperatures across the state. High temperatures across the state this past week generally ranged from the mid 80's to mid 90's...the exception being areas that had been impacted with t'storm activity. The combination of high temperatures and high dew points lead to high humidity and heat index values for a few of the days. Heat index values in the upper 90's to mid 100's occurred across portions of Northern and Central Illinois for a few days, during the early to early to middle of this past week. For this upcoming week, the main heat wave will occur, with high temperatures across the state likely to range from the low to upper 90's on a daily basis. However, some t'storm activity may be possible for some areas from time to time, which could temper the heat in a few areas at times. Additionally, dew points will be on the rise early in the week, and then remain high mid through late week. The combination of high temperatures and high dew points will lead to high humidity and heat index values. Early week heat index values in the low 90's to low 100's are likely across the state, increasing to the mid 90's to mid 100's for mid to late week. Low temperatures across the state will be in the mid 60's to mid 70's for more areas on a nightly basis, and likely warmer in the mid 70's to around 80 for more urban areas, such as Chicago. There are signs that the heat could persist beyond this upcoming week, through next weekend (11/12th), and potentially beyond into the following week. However, confidence at that range greatly decreases, thus will not go too far into that potential for now.
Sunday, July 5th Forecast...
High temperatures ranging from the upper 80's to mid 90's across the state, with cooler temps expected in Northeast Illinois near Lake Michigan. Heat index values in the upper 80's to upper 90's across the state. Low temperatures in the low 60's to low 70's across the state. Monday, July 6th Forecast... High temperatures ranging from the low to mid 90's across the state. Heat index values in the low to upper 90's across the state. Low temperatures in the mid 60's to mid 70's across the state. With all of that said, for now an overall low heat wave impact is expected. However, as conditions for this upcoming week become more clear, an upgrade to moderate impact is likely. An update will be provided each day for the duration of this heat wave across the state. Each update will feature a recap of previous days temperatures, along with the forecast for the next two days, and any other overall additional information. 
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