National Weather Service United States Department of Commerce

Oppressive heat and humidity building into the central and southeast U.S.

A heat wave is building into parts of the central and southeast U.S. this week. The combination of heat and humidity will lead to dangerous heat indices, especially in parts of the central Mississippi River Valley where an Excessive Heat Warning is in effect. Heat Advisories are in effect elsewhere across the region. Relief is not expected for several days.
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Hazardous Weather Conditions

8NM ESE Chicago IL

Marine Point Forecast [NOTICE]

Tonight

Chance Thunderstorms

Light Wind
< 1ft

Low: 74 °F
Water: 52 °F

Thursday

Thunderstorms Likely

S 10kt
< 1ft

High: 85 °F

Thursday
Night

Chance Thunderstorms

Light Wind
< 1ft

Low: 74 °F

Friday

Chance Thunderstorms

SW 10kt
< 1ft

High: 85 °F

Friday
Night

Chance Thunderstorms

Light Wind
< 1ft

Low: 72 °F

Saturday

Chance Thunderstorms

NNE 10kt
< 1ft

High: 83 °F

Saturday
Night

Chance Thunderstorms

Light Wind
< 1ft

Low: 71 °F

Sunday

Slight Chc Thunderstorms

Light Wind
< 1ft

High: 84 °F

Sunday
Night

Slight Chc Thunderstorms

SSW 10kt
< 1ft

Low: 71 °F

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 9:02 pm CDT Aug 20, 2014
Forecast Valid: 10pm CDT Aug 20, 2014-6pm CDT Aug 27, 2014

View Nearby Observations

Detailed Forecast

WAVES ARE PROVIDED AS A RANGE OF SIGNIFICANT WAVE HEIGHTS...WHICH IS THE AVERAGE HEIGHT OF THE HIGHEST 1/3 OF THE WAVES...ALONG WITH THE AVERAGE HEIGHT OF THE HIGHEST 10 PERCENT OF THE WAVES WHICH WILL OCCASIONALLY BE ENCOUNTERED.

  • Tonight Variable winds 5 kt or less. Isolated showers, then a chance of showers and thunderstorms after 1am. Waves 1 ft or less.
  • Thursday S wind 5 to 10 kt. Showers and thunderstorms likely, mainly between 7am and 1pm. Waves 1 ft or less.
  • Thursday Night Variable winds 5 kt or less. Winds could gust as high as 10 kt. A chance of showers and thunderstorms. Waves 1 ft or less.
  • Friday SW wind 5 to 10 kt. A chance of showers and thunderstorms, mainly before 1pm. Waves 1 ft or less.
  • Friday Night Variable winds 5 kt or less. A chance of showers and thunderstorms. Waves 1 ft or less.
  • Saturday NNE wind 5 to 10 kt. A chance of showers and thunderstorms. Waves 1 ft or less.
  • Saturday Night Variable winds 5 kt or less. A chance of showers and thunderstorms. Waves 1 ft or less.
  • Sunday Variable winds 5 kt or less. A slight chance of showers and thunderstorms. Waves 1 ft or less.
  • Sunday Night SSW wind 5 to 10 kt. A slight chance of showers and thunderstorms. Waves 1 ft or less.
*Notices:
  1. This forecast is for a single location. For safety concerns, mariners should be aware of the weather over a larger area. Forecast information for a larger area can be found within the zone forecast and the NDFD graphics.
  2. The forecast conditions at a particular point may not exceed the criteria of a Small Craft Advisory, Gale, Storm etc. These watches/warnings/advisories are issued for the entire zone in which the point resides and mariners should act accordingly.