Downloading InterWARN 4.2.1 from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this software available.
According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. The program's installer is commonly called interwarn.exe.
The program lies within Home & Hobby Tools, more precisely Weather. You can execute this PC software on Windows XP/Vista/7/8/10/11 32-bit. The most popular versions of the program 4.2, 4.1 and 4.0. This tool was originally developed by StormAlert Inc.
From the developer:
InterWARN is a state-of-the-art weather warning retrieval program for Windows 95/98/NT. InterWARN turns your regular internet connection into your own automated personal wire service for National Weather Service watches, warnings and statements including Storm Prediction Center watches and outlooks, and advisories from the National Hurricane Center.
You may want to check out more software, such as WeatherStudio, Current Weather or Weather Center, which might be similar to InterWARN.