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

Tropical Moisture Will Bring Heavy to Excessive Rainfall with Possible Flooding This Week

Tropical moisture from the remnants of Odalys and Hurricane Polo will surge over the southwest into the central U.S. this week with several days of heavy to excessive rainfall which may bring limited to considerable flooding. Flood Watches have been issued through Wednesday in the southwest U.S. and moderate risk outlooks have been issued today through Thursday. Read More >

Hazardous Weather Conditions

Current conditions at

Gary Regional Airport (KGYY)

Lat: 41.61°NLon: 87.41°WElev: 584ft.

Fair

N/A

Humidity NA
Wind Speed NE 9 mph
Barometer 30.06 in
Dewpoint N/A
Visibility 10.00 mi
Last update 28 Sep 2:50 pm CDT
Extended Forecast for

Merrillville IN

  • This Afternoon

    This Afternoon: Sunny, with a high near 71. North northeast wind around 5 mph.

    High: 71 °F

    Sunny

  • Tonight

    Tonight: Patchy fog after 1am. Otherwise, partly cloudy, with a low around 50. North northeast wind around 5 mph becoming calm in the evening.

    Low: 50 °F

    Mostly Clear
    then Patchy
    Fog

  • Tuesday

    Tuesday: Patchy fog before 9am. Otherwise, mostly sunny, with a high near 77. Calm wind becoming south around 5 mph in the afternoon.

    High: 77 °F

    Patchy Fog
    then Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 61. South wind around 5 mph, with gusts as high as 15 mph.

    Low: 61 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of showers after 1pm. Partly sunny, with a high near 77. South wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 77 °F

    Partly Sunny
    then Slight
    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers after 1am. Mostly cloudy, with a low around 67.

    Low: 67 °F

    Mostly Cloudy
    then Chance
    Showers

  • Thursday

    Thursday: A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Cloudy, with a high near 75. Chance of precipitation is 70%.

    High: 75 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers likely. Cloudy, with a low around 56.

    Low: 56 °F

    Showers
    Likely

  • Friday

    Friday: A chance of showers. Partly sunny, with a high near 64.

    High: 64 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
Sunny, with a high near 71. North northeast wind around 5 mph.
Tonight
Patchy fog after 1am. Otherwise, partly cloudy, with a low around 50. North northeast wind around 5 mph becoming calm in the evening.
Tuesday
Patchy fog before 9am. Otherwise, mostly sunny, with a high near 77. Calm wind becoming south around 5 mph in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 61. South wind around 5 mph, with gusts as high as 15 mph.
Wednesday
A 20 percent chance of showers after 1pm. Partly sunny, with a high near 77. South wind 5 to 10 mph, with gusts as high as 15 mph.
Wednesday Night
A 30 percent chance of showers after 1am. Mostly cloudy, with a low around 67.
Thursday
A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Cloudy, with a high near 75. Chance of precipitation is 70%.
Thursday Night
Showers likely. Cloudy, with a low around 56.
Friday
A chance of showers. Partly sunny, with a high near 64.
Friday Night
A chance of showers after 1am. Mostly cloudy, with a low around 50.
Saturday
A chance of showers. Partly sunny, with a high near 65.
Saturday Night
Mostly cloudy, with a low around 51.
Sunday
Mostly sunny, with a high near 65.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Merrillville IN
 41.47°N 87.33°W
Last Update:
2:56 pm CDT Sep 28, 2026
Forecast Valid:
3pm CDT Sep 28, 2026-6pm CDT Oct 4, 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