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80°
Hi 88° / Low 67°
Heat Index: 84°
Partly Cloudy

    Wednesday, August 20th, 2014

    Generous sunshine mixes with cottony cumulus clouds late morning/afternoon. Warm, moderatelyhumid.

    Southwest winds 10-15 mph boost afternoon highs well into 80s, though easterly lake breezes will lower immediate shoreline temps to the upper 70s to mid 80s later Wednesday. Widely scattered afternoon/evening thunderstorms may produce downpours/gusty winds but should affect just 30% of the metro area. Warm and humid Wednesday night. Scattered t-storms may impact half the metro area overnight.

    Hi 89° Low 71°
    Partly Cloudy T-storms

      Thursday, August 21st, 2014

      Becoming quite warm and humid. Remnant clouds and a few scattered showers or thunderstorms early becoming partly sunny.

      Daytime heating is to provoke development of gusty, potentially downpour-generating thunderstorms develop in the afternoon and may continue into Thursday night. Warm andmuggy overnight. A southwest breeze 8-18 mph.

      Hi 93° Low 73°
      Partly Cloudy

        Friday, August 22nd, 2014

        Mostly sunny, hot and humid. A few building cumulus clouds in the afternoon could result in an isolated thunderstorm or two in the area.

        Highest temperatures reach the low 90s; peak inland afternoon heatindices approach 100. Southwest winds 6 to 14 may become onshore in the afternoon lowering temperatures modestly on area beaches and immediate shoreline locations to the mid 80s.

        Hi 94° Low 74°
        Partly Cloudy

          Saturday, August 23rd, 2014

          Mostly sunny, quite hot and humid. Peak afternoon heat indices may approach105-degree range.

          Easterly lake breezes on are beaches and the immediate Lake Michigan shoreline may hold temperatures there to the mid to upper 80s. Mostly clear skies Saturday, very warm and muggy overnight. Southwest winds.

          Hi 92° Low 73°
          Partly Cloudy T-storms

            Sunday, August 24th, 2014

            Another very hot, humid day. Afternoon highs are to surge into the low to mid 90s with a heat index of 100 degrees—possibly higher.

            Current indications suggest t-storms will remain north in Wisconsin thanks to a “cap”—i.e. a layer of t-storm-suppressing warm air aloft—in place across the Chicago area. By limiting t-storm chances, temperatures to remain well above normal. Failure of a cap to hold would necessitate t-storms and lower temps being introduced in future forecasts. Better organized southwest winds 8 to 18 mph are to overcome shoreline cooling.

            Hi 90° Low 68°
            Partly Cloudy T-storms

              Monday, August 25th, 2014

              Sun gives way to building clouds. Remaining quite warm and very muggy.

              Scattered, potentially active afternoon thunderstorms are to impact40% of the Chicago area. Better coverage, more numerous thunderstorms threaten Monday night.

              Hi 83° Low 66°
              Partly Cloudy T-storms

                Tuesday, August 26th, 2014

                Cloudy skies for the most part. Occasional showers or thunderstorms possible.

                Afternoon highs in the low 80s with cooler readings along the lakefront. A steady breeze out of the east to northeast.

                  Wednesday
                  88°
                  67°
                  Partly Cloudy T-storms

                  August 20th

                  Humidity: 73-89%
                  Precip: 20-10%
                  +
                  Generous sunshine mixes with cottony cumulus clouds late morning/afternoon. Warm, moderatelyhumid.
                  Thursday
                  89°
                  71°
                  Partly Cloudy T-storms

                  August 21st

                  Humidity: 49-94%
                  Precip: 60-10%
                  +
                  Becoming quite warm and humid. Remnant clouds and a few scattered showers or thunderstorms early becoming partly sunny.
                  Friday
                  93°
                  73°
                  Partly Cloudy

                  August 22nd

                  Humidity: 59-94%
                  Precip: 20-70%
                  +
                  Mostly sunny, hot and humid. A few building cumulus clouds in the afternoon could result in an isolated thunderstorm or two in the area.
                  Saturday
                  94°
                  74°
                  Partly Cloudy

                  August 23rd

                  Humidity: 78-94%
                  Precip: 10-90%
                  +
                  Mostly sunny, quite hot and humid. Peak afternoon heat indices may approach105-degree range.
                  Sunday
                  92°
                  73°
                  Partly Cloudy T-storms

                  August 24th

                  Humidity: 62-94%
                  Precip: 30-70%
                  +
                  Another very hot, humid day. Afternoon highs are to surge into the low to mid 90s with a heat index of 100 degrees—possibly higher.
                  Monday
                  90°
                  68°
                  Partly Cloudy T-storms

                  August 25th

                  Humidity: 55-86%
                  Precip: 30-70%
                  +
                  Sun gives way to building clouds. Remaining quite warm and very muggy.
                  Tuesday
                  83°
                  66°
                  Partly Cloudy T-storms

                  August 26th

                  Humidity: 55-82%
                  Precip: 20-60%
                  +
                  Cloudy skies for the most part. Occasional showers or thunderstorms possible.
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