Notice of NWS' New Version of Forecast
A new version of Forecast is coming soon!
Click here to visit the new site for details.
National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Excessive Heat From the Midwest to Northeast Today; Heavy Rainfall Threat Increasing Along the western Gulf Coast

Heat Advisories, and in some areas, Excessive Heat Warnings, continue today as hot temperatures and high humidity combine to create dangerous conditions. A slow-moving cold front from the Northeast to the northern Rockies will be the focus for potentially heavy rainfall this week, while tropical moisture moving into the western Gulf Coast will lead to an increased flash flood threat. Read More >

Hazardous Weather Conditions

Current conditions at

Gary Regional Airport (KGYY)

Lat: 41.61°NLon: 87.41°WElev: 584ft.

Partly Cloudy

93°F

34°C

Humidity 44%
Wind Speed SW 17 mph
Barometer 29.95 in
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index97°F (36°C)
Last update 18 Jun 1:45 pm CDT
Extended Forecast for

Merrillville IN

Heat Advisory until June 18, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory until June 18, 07:00pm

    NOW until
    7:00pm Mon

    Heat Advisory

  • This
    Afternoon

    This Afternoon: A 20 percent chance of showers and thunderstorms after 4pm. Sunny and hot, with a high near 96. Heat index values as high as 108. West southwest wind around 15 mph, with gusts as high as 20 mph.

    Slight Chance
    T-storms

    High: 96 °F

  • Tonight

    Tonight: Showers and thunderstorms likely, mainly between 1am and 4am. Mostly cloudy, with a low around 67. North northeast wind 10 to 15 mph becoming light and variable. Winds could gust as high as 20 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    T-storms
    Likely

    Low: 67 °F

  • Tuesday

    Tuesday: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 82. Calm wind becoming north northeast around 5 mph in the afternoon.

    Chance
    T-storms

    High: 82 °F

  • Tuesday
    Night

    Tuesday Night: Showers and thunderstorms likely, mainly before 1am. Mostly cloudy, with a low around 65. North northeast wind around 5 mph becoming east after midnight. Chance of precipitation is 70%.

    T-storms
    Likely

    Low: 65 °F

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 78. North northeast wind 5 to 10 mph.

    Chance
    T-storms

    High: 78 °F

  • Wednesday
    Night

    Wednesday Night: Mostly cloudy, with a low around 61.

    Mostly Cloudy

    Low: 61 °F

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 80.

    Partly Sunny
    then Slight
    Chance
    T-storms

    High: 80 °F

  • Thursday
    Night

    Thursday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 62.

    Chance
    T-storms

    Low: 62 °F

Detailed Forecast

This Afternoon
A 20 percent chance of showers and thunderstorms after 4pm. Sunny and hot, with a high near 96. Heat index values as high as 108. West southwest wind around 15 mph, with gusts as high as 20 mph.
Tonight
Showers and thunderstorms likely, mainly between 1am and 4am. Mostly cloudy, with a low around 67. North northeast wind 10 to 15 mph becoming light and variable. Winds could gust as high as 20 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 82. Calm wind becoming north northeast around 5 mph in the afternoon.
Tuesday Night
Showers and thunderstorms likely, mainly before 1am. Mostly cloudy, with a low around 65. North northeast wind around 5 mph becoming east after midnight. Chance of precipitation is 70%.
Wednesday
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 78. North northeast wind 5 to 10 mph.
Wednesday Night
Mostly cloudy, with a low around 61.
Thursday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 80.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 62.
Friday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 78.
Friday Night
Showers and thunderstorms likely, mainly before 1am. Mostly cloudy, with a low around 65.
Saturday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 81.
Saturday Night
Partly cloudy, with a low around 65.
Sunday
A slight chance of showers and thunderstorms. Partly sunny, with a high near 82.
Click Map For Forecast
Disclaimer
Map Legend
Point Forecast:
Merrillville IN
 41.47°N 87.33°W
Last Update:
1:17 pm CDT Jun 18, 2018
Forecast Valid:
2pm CDT Jun 18, 2018-6pm CDT Jun 24, 2018
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation