National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Significant Coastal Impacts to the Mid-Atlantic and Northeast; Tropical Storm Nolo to Impact Hawaii

A strong coastal storm will bring moderate to major coastal flooding, strong winds, heavy rainfall and high surf to the Mid-Atlantic and New England. Tropical Storm Nolo is expected to strengthen into a hurricane Thursday as it moves north toward the Big Island of Hawaii. Heavy rainfall will continue through Saturday, with locally catastrophic flooding possible. Hurricane Watch in effect. Read More >

Hazardous Weather Conditions

Current conditions at

Gary Regional Airport (KGYY)

Lat: 41.61°NLon: 87.41°WElev: 584ft.

Overcast

63°F

17°C

Humidity 100%
Wind Speed NE 7 mph
Barometer 30.33 in
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 23 Sep 6:50 pm CDT
Extended Forecast for

Merrillville IN

  • Tonight

    Tonight: A chance of sprinkles before 10pm. Mostly cloudy, with a low around 56. East northeast wind 5 to 10 mph, with gusts as high as 15 mph.

    Low: 56 °F

    Chance
    Sprinkles

  • Thursday

    Thursday: Partly sunny, with a high near 69. East wind 5 to 10 mph.

    High: 69 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 52. East southeast wind around 5 mph.

    Low: 52 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 67. East wind around 5 mph.

    High: 67 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 49. Northeast wind around 5 mph.

    Low: 49 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 68.

    High: 68 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 52.

    Low: 52 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 68.

    High: 68 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 52.

    Low: 52 °F

    Partly Cloudy

Detailed Forecast

Tonight
A chance of sprinkles before 10pm. Mostly cloudy, with a low around 56. East northeast wind 5 to 10 mph, with gusts as high as 15 mph.
Thursday
Partly sunny, with a high near 69. East wind 5 to 10 mph.
Thursday Night
Mostly cloudy, with a low around 52. East southeast wind around 5 mph.
Friday
Mostly sunny, with a high near 67. East wind around 5 mph.
Friday Night
Partly cloudy, with a low around 49. Northeast wind around 5 mph.
Saturday
Mostly sunny, with a high near 68.
Saturday Night
Mostly cloudy, with a low around 52.
Sunday
Partly sunny, with a high near 68.
Sunday Night
Partly cloudy, with a low around 52.
Monday
Mostly sunny, with a high near 70.
Monday Night
Mostly clear, with a low around 53.
Tuesday
Mostly sunny, with a high near 75.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 60.
Wednesday
Showers likely. Mostly cloudy, with a high near 71.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Merrillville IN
 41.47°N 87.33°W
Last Update:
6:36 pm CDT Sep 23, 2026
Forecast Valid:
7pm CDT Sep 23, 2026-6pm CDT Sep 30, 2026
 
Forecast Discussion
 
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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