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(10:00PM - 7/19/19) Multiple disturbances expected to move through the region will bring the chance for severe t'storms to portions of the state Saturday and Sunday.
7/20/19 - Saturday Morning-Night Forecast... Scattered showers and t'storms will develop and/or regenerate Saturday afternoon across portions of Wisconsin, Iowa and Northern Illinois. This activity will then push across much of Northern and portions of Central Illinois, Saturday afternoon into Saturday night. Multiple waves of activity can be expected during this time-frame. The environment in place will feature high instability, high moisture and low shear. This will help support an isolated severe t'storm threat across Northern Illinois, with damaging winds and hail being the main threats. An upgrade in severe t'storm probabilities may be needed in future updates. Sunday's threat will be discussed in future updates. Below is the TAM severe t'storm forecast for Saturday morning-night. 
JP
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(9:15PM - 7/19/19) A multi-day heat wave will continue to affect the state through Sunday, with widespread hot and humid conditions are likely.
7/20/19 - Saturday/Night Forecast... High temperatures on Saturday will likely reach the low to upper 90's across much of the state, with isolated temperatures around 100 possible. Heat index readings will range from 100-120 across the state. Low temperatures Saturday night will stay in the 70's for much of Central and Southern Illinois, with temperatures closer to 80 or in the low 80's possible for the more urban areas, such as St. Louis. A cold front, and associated rain and t'storms, will likely push into portions of Northern Illinois Saturday afternoon into night, leading to cooler low temperatures across this area...and an end to the heat wave for Northern Illinois. 7/21/19 - Sunday/Night Forecast... The aforementioned cold front with showers and t'storm pushing across Northern Illinois later Saturday, will also push into Central Illinois beginning Sunday morning, ending the heat wave for Central Illinois. High temperatures on Sunday will likely reach the low to mid 90's Southern Illinois, with heat index readings ranging from 100-115.
7/17/19 - Wednesday/Night Recap...
High temperatures on Wednesday were in the upper 80's to mid 90's across much of the state, with heat indices between 90-105. Low temperatures Wednesday night were in the upper 60's to mid 70's. 7/18/19 - Thursday/Night Recap... High temperatures on Thursday were in the upper 80's to mid 90's across much of the state, with heat indices between 95-110. Low temperatures Thursday night were in the mid 70's to low 80's across much of the state. Below is the TAM heat and humidity forecast through Sunday. 
JP
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(12:00PM - 7/19/19) Multiple disturbances expected to move through the region will bring the chance for severe t'storms to portions of the state Saturday and Sunday.
7/20/19 - Saturday Morning-Night Forecast... Scattered showers and t'storms will develop and/or regenerate Saturday afternoon across portions of Wisconsin, Northern Illinois and Iowa. This activity will then push across much of Northern and portions of Central Illinois, Saturday afternoon into Saturday night. Multiple waves of activity can be expected during that time-frame. The environment in place will feature high instability, high moisture and low shear. This will help support an isolated severe t'storm threat across Northern Illinois, with damaging winds and hail being the main threats. Sunday's threat will be discussed in future updates. Below is the TAM severe t'storm forecast for Saturday morning-night. 
JP
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(10:45AM - 7/19/19) A multi-day heat wave will continue to affect the state through Sunday, with widespread hot and humid conditions are likely.
7/19/19 - Today/Tonight's Forecast... High temperatures on today will likely reach the low to upper 90's across much of the state, with isolated temperatures around 100 possible. Heat index readings will range from 100-115 across the state. Low temperatures tonight will stay in the mid 70's to low 80's. 7/20/19 - Saturday/Night Forecast... High temperatures on Saturday will likely reach the low to upper 90's across much of the state, with isolated temperatures around 100 possible. Heat index readings will range from 100-115 across the state. Low temperatures Saturday night will stay in the 70's for much of Central and Southern Illinois, with temperatures closer to 80 or in the low 80's possible for the more urban areas, such as St. Louis. Rain and t'storms will likely push into portions of Northern Illinois Saturday evening and night, leading to cooler low temperatures across this area.
7/17/19 - Wednesday/Night Recap...
High temperatures on Wednesday were in the upper 80's to mid 90's across much of the state, with heat indices between 90-105. Low temperatures Wednesday night were in the upper 60's to mid 70's. 7/18/19 - Thursday/Night Recap... High temperatures on Thursday were in the upper 80's to mid 90's across much of the state, with heat indices between 95-110. Low temperatures Thursday night were in the mid 70's to low 80's across much of the state.
A ridge across the middle of the country will bring an extended period of hot and humid conditions to the state through Sunday. A southwest flow aloft will continuously pull in warmer temperatures aloft into the region. With good mixing of the atmosphere expected, high temperatures across the state will likely range from the low 90's to around across the state during the period. Thursday through Saturday look to be the hottest days of the period, with widespread high temperatures in the mid 90's to around 100 likely across the state.
In addition to the hot temperatures, high humidity is also expected. Dew points will likely be well into the 70's much of the period, which when combined with high temperatures in the low 90's to near 100, will lead to heat indices of 100-115 during much of the period. Low temperatures will also stay quite warm, only getting down into the 70's for much of the state during the period. However, low temperatures will likely stay near 80 or in the low 80's for urban ares, Thursday through Saturday. The St. Louis and Chicago areas are most susceptible for this. Below is the TAM heat and humidity forecast through Sunday. 
JP
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(9:00PM - 7/18/19) A multi-day heat wave will continue to affect the state through Sunday, with widespread hot and humid conditions are likely.
7/19/19 - Friday/Night Forecast... High temperatures on Friday will likely reach the low to upper 90's across much of the state, with isolated temperatures around 100 possible. Heat index readings will range from 100-115 across the state. Low temperatures Friday night will stay in the 70's for most of the state, with temperatures closer to 80 or in the low 80's possible for the more urban areas, such as Chicago and St. Louis. 7/20/19 - Saturday/Night Forecast... High temperatures on Saturday will likely reach the low to upper 90's across much of the state, with isolated temperatures around 100 possible. Heat index readings will range from 100-115 across the state. Low temperatures Saturday night will stay in the 70's for most of the state, with temperatures closer to 80 or in the low 80's possible for the more urban areas, such as St. Louis. 7/17/19 - Wednesday/Night Recap... High temperatures on Wednesday were in the upper 80's to mid 90's across much of the state, with heat indices between 90-105. Low temperatures Wednesday night were in the upper 60's to mid 70's.
A ridge across the middle of the country will bring an extended period of hot and humid conditions to the state through Sunday. A southwest flow aloft will continuously pull in warmer temperatures aloft into the region. With good mixing of the atmosphere expected, high temperatures across the state will likely range from the low 90's to around across the state during the period. Thursday through Saturday look to be the hottest days of the period, with widespread high temperatures in the mid 90's to around 100 likely across the state.
In addition to the hot temperatures, high humidity is also expected. Dew points will likely be well into the 70's much of the period, which when combined with high temperatures in the low 90's to near 100, will lead to heat indices of 100-115 during much of the period. Low temperatures will also stay quite warm, only getting down into the 70's for much of the state during the period. However, low temperatures will likely stay near 80 or in the low 80's for urban ares, Thursday through Saturday. The St. Louis and Chicago areas are most susceptible for this. Below is the TAM heat and humidity forecast through Sunday. 
JP
Please consider becoming a Patreon as a way to say thanks and support us for what we do! www.patreon.com/user?u=16598980 To receive text alerts via our in-telligent groups text ISC to 900900
(2:00PM - 7/18/19) A multi-day heat wave will continue to affect the state through Sunday, with widespread hot and humid conditions are likely.
7/18/19 - Today/Tonight's Forecast... High temperatures on today will reach into the low to upper 90's across much of the state. However, across portions of Northern Illinois highs will be limited to the mid 80's to mid 90's, due to a rain and t'storm complex that pushed across the area this morning. Heat index readings will range from 100-112 across the state. Low temperatures tonight will stay in the 70's for most of the state, with temperatures closer to 80 possible for the more urban areas, such as St. Louis. 7/19/19 - Friday/Night Forecast... High temperatures on Friday will likely reach the mid to upper 90's across much of the state, with isolated low 100's possible. Heat index reading will range from 100-115 across the state. Low temperatures Friday night will stay in the 70's for most of the state, with temperatures closer to 80 or in the low 80's possible for the more urban areas, such as Chicago and St. Louis. 7/17/19 - Wednesday/Night Recap... High temperatures on Wednesday were in the upper 80's to mid 90's across much of the state, with heat indices between 90-105. Low temperatures Wednesday night were in the upper 60's to mid 70's.
A ridge across the middle of the country will bring an extended period of hot and humid conditions to the state through Sunday. A southwest flow aloft will continuously pull in warmer temperatures aloft into the region. With good mixing of the atmosphere expected, high temperatures across the state will likely range from the low 90's to around across the state during the period. Thursday through Saturday look to be the hottest days of the period, with widespread high temperatures in the mid 90's to around 100 likely across the state.
In addition to the hot temperatures, high humidity is also expected. Dew points will likely be well into the 70's much of the period, which when combined with high temperatures in the low 90's to near 100, will lead to heat indices of 100-115 during much of the period. Low temperatures will also stay quite warm, only getting down into the 70's for much of the state during the period. However, low temperatures will likely stay near 80 or in the low 80's for urban ares, Thursday through Saturday. The St. Louis and Chicago areas are most susceptible for this. Below is the TAM heat and humidity forecast through Sunday. 
JP
Please consider becoming a Patreon as a way to say thanks and support us for what we do! www.patreon.com/user?u=16598980 To receive text alerts via our in-telligent groups text ISC to 900900
(9:15PM - 7/17/19) Disturbances moving through the region will bring the chance for severe t'storms to portions of the state, through Thursday evening.
7/17/19 - Tonight's Forecast... A large complex of rain and t'storms has been pushing Central and Southern Illinois this evening, with some of these storm having been severe. This activity will continue across Southern Illinois for the next several hours, before diminishing with time. An isolated severe t'storm threat will continue to be possible across Southern Illinois into early tonight. Damaging winds and large hail will be the main threats. 7/18/19 - Thursday Morning-Night Forecast... A large complex of rain and t'storms is expected to develop tonight (Wed Night) across portions of Iowa, Minnesota and Wisconsin. This activity is expected to push southeastward, across Central/Southern Wisconsin and Northern Illinois Thursday morning. An isolated severe t'storm threat will exist with this activity, with damaging winds and hail being the main threats. Below is the TAM severe t'storm forecast for Thursday morning-night. 
JP
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(8:30PM - 7/17/19) A multi-day heat wave will continue to affect the state through Sunday, with widespread hot and humid conditions are likely.
7/18/19 - Thursday/Night Forecast... High temperatures on Thursday will likely reach the low to upper 90's across much of the state. Heat index readings will range from 100-112 across the state. Low temperatures Thursday night will stay in the 70's for most of the state, with temperatures closer to 80 possible for the more urban areas, such as Chicago and St. Louis. It should be noted that some model guidance suggests a weakening complex of rain and t'storms may push into portions of Northern Illinois Thursday morning. Should this scenario unfold, this may temper high temperatures across portions of Northern Illinois a bit. 7/19/19 - Friday/Night Forecast... High temperatures on Friday will likely reach the mid to upper 90's across much of the state, with local low 100's possible. Heat index reading will range from 100-112 across the state. Low temperatures Friday night will stay in the 70's for most of the state, with temperatures closer to 80 or in the low 80's possible for the more urban areas, such as Chicago and St. Louis. A developing ridge across the middle of the country will bring an extended period of hot and humid conditions to the state, Wednesday through Sunday. A southwest flow aloft will continuously pull in warmer temperatures aloft into the region. With good mixing of the atmosphere expected, high temperatures across the state will likely range from the low 90's to low 100's across the state during the period. Thursday through Saturday look to be the hottest days of the period, with widespread high temperatures in the mid 90's to low 100's likely across the state.
In addition to the hot temperatures, high humidity is also expected. Dew points will likely be well into the 70's much of the period, which when combined with high temperatures in the low 90's to low 100's, will lead to heat indices of 100-115 during much of the period.
Low temperatures will also stay quite warm, only getting down into the 70's for much of the state during the period. However, low temperatures will likely stay near 80 or in the low 80's for urban ares, Thursday through Saturday. The St. Louis and Chicago areas are most susceptible for this. As modeled at this time, this will be a higher end heat wave, with records in play for many areas. This will likely be the most significant and widespread heat wave across the state since 2012. Below is the TAM heat and humidity forecast for Wednesday through Sunday. 
JP
Please consider becoming a Patreon as a way to say thanks and support us for what we do! www.patreon.com/user?u=16598980 To receive text alerts via our in-telligent groups text ISC to 900900 (1:15PM - 7/17/19) A disturbance moving through the region will bring the chance for severe t'storms to portions of the state, through tonight. 7/17/19 - This Afternoon-Tonight's Forecast... A large complex of rain and t'storms has been pushing across Iowa this morning and early afternoon. This activity is expected to spread southeastward, into portions of Northwest, Western and Southwest Illinois from this afternoon into tonight. An environment in place featuring moderate instability, high moisture and low shear will help support an isolated to widely scattered severe t'storm threat for the aforementioned areas. Damaging winds and hail will be the main threats. Below is the TAM severe t'storm forecast for this afternoon-tonight.  JP
Please consider becoming a Patreon as a way to say thanks and support us for what we do! www.patreon.com/user?u=16598980 To receive text alerts via our in-telligent groups text ISC to 900900
(12:30PM - 7/17/19) A multi-day heat wave will affect the state, from today through Sunday. Widespread hot and humid conditions are likely during this period.
7/17/19 - Today/Tonight's Forecast... High temperatures today will range from the low to mid 90's across much of the state. However, a lake breeze and associated isolated showers and t'storms may temper high temperatures a bit across Northeast Illinois. Low temperatures tonight will stay in the 70's across much of the state. 7/18/19 - Thursday/Night Forecast... High temperatures on Thursday will likely reach the mid to upper 90's across much of the state. Low temperatures Thursday night will stay in the 70's for most of the state, with temperatures closer to 80 possible for the more urban areas, such as Chicago and St. Louis. A developing ridge across the middle of the country will bring an extended period of hot and humid conditions to the state, Wednesday through Sunday. A southwest flow aloft will continuously pull in warmer temperatures aloft into the region. With good mixing of the atmosphere expected, high temperatures across the state will likely range from the low 90's to low 100's across the state during the period. Thursday through Saturday look to be the hottest days of the period, with widespread high temperatures in the mid 90's to low 100's likely across the state.
In addition to the hot temperatures, high humidity is also expected. Dew points will likely be well into the 70's much of the period, which when combined with high temperatures in the low 90's to low 100's, will lead to heat indices of 100-115 during much of the period.
Low temperatures will also stay quite warm, only getting down into the 70's for much of the state during the period. However, low temperatures will likely stay near 80 or in the low 80's for urban ares, Thursday through Saturday. The St. Louis and Chicago areas are most susceptible for this. As modeled at this time, this will be a higher end heat wave, with records in play for many areas. This will likely be the most significant and widespread heat wave across the state since 2012. Below is the TAM heat and humidity forecast for Wednesday through Sunday. 
JP
Please consider becoming a Patreon as a way to say thanks and support us for what we do! www.patreon.com/user?u=16598980 To receive text alerts via our in-telligent groups text ISC to 900900 |
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