Mac App Store

Mac App Store is the simplest way to find and download apps for your Mac.

To download RadarScope from the Mac App Store, you need a Mac with OS X 10.6.6 or later. Learn More.


By Base Velocity, LLC

Open the Mac App Store to buy and download apps.


RadarScope is a specialized display utility for weather enthusiasts and meteorologists that allows you to view NEXRAD Level 3 radar data and severe weather warnings. It can display the latest reflectivity, velocity, and other radar products from any NEXRAD radar site in the United States, Guam and Puerto Rico. These aren't smoothed PNG or GIF images, this is real Level 3 radar data rendered in its original radial format for a high level of detail.

Whether you are scanning reflectivity for a mesocyclone's tell-tale hook echo, trying to pinpoint the landfall of a hurricane's eye wall, or looking for small features like velocity couplets in the storm relative radial velocity product, RadarScope gives you the power to view true radial NEXRAD weather radar on your Mac.

RadarScope displays tornado, severe thunderstorm, and flash flood warnings issued by the National Weather Service. You can browse the list of active warnings in the information sidebar, select a warning to view the details, and even zoom to the selected warning on the map.

Zoom in and out on the map using the mouse or pinch gestures on multi-touch trackpads. Click and drag to scroll around the map. Select one of the 155 different radar sites using buttons on the map, the full radar list in the sidebar, or your list of saved favorites in the menu bar. Tap the play button to download and animate up to 20 frames of radar data. Dynamically display the names of over 25,000 cities and towns on the map as you zoom and scroll. Move the cursor over the color legend to see the data value associated with each color. You can also copy the currently displayed map to the clipboard or save it in several common image formats.

Meanwhile, RadarScope will retrieve and display updated data automatically and intelligently (approximately every 5 to 10 minutes, depending on the radar scan strategy).

You can display Level 3 radar data from NOAA's public access web site or use your Allison House subscriber account for radar data (recommended).

Please visit our web site for more information.

What's New in Version 2.2.3

- 2.2.3: even more bugs vanquished

RadarScope 2.0 introduces:
- Redesigned UI for Mac OS X Yosemite
- RadarScope Pro subscriptions for lightning and longer radar loops
- Improvements to radar status feed
- New SPC outlook color scheme for AH subscribers
- Various bug fixes

- 2.2.2 squashes many UI bugs (some on Yosemite, many more on Mavericks)
- Better handling for Macs with dual GPUs
- 2.2.1 addresses an issue with the App Store on OS X sometimes providing invalid receipt data for In-App Purchases. If you encountered an error purchasing RadarScope Pro, please contact and we will straighten it out for you!


Screenshot 1
Screenshot 2
Screenshot 3
Screenshot 4
Screenshot 5

Customer Reviews

Best Radar App Available (Mac, iPad, iPhone)

RadarScope is my go-to radar application for my Macs, multiple iPads, and all the family iPhones. The in-app purchase (~$9.99/year) provides increased functionality that I like, but is not absolutely necessary…the enhancements include lighting strikes, extended radar loops, and Super Res Level 2 radar data…that said, I bought it and have renewed it annually, too. I’ve been using this app for many years now, and it’s been stable through all the updates. It has a wealth of functionality that will give you as much data as your local TV newscaster…and that is without the AllisonHouse feeds, or using the other ‘advanced’ capabilities. I have 15 plus weather apps and a handful of dedicated radar applications. This is the best I’ve seen as as close to ‘expert mode’ as you can get. And, although it has lots of functionality, you can run it in Composite Reflectivity mode if you like too (versus of reflectivity capabilities, velocity capabilities, estimated rainfall, echo tops, and about 25+ other radar features). It’s also well thought out and very intuitive, very user friendly in that you can add major roads, cities, storm tracks warnings….or you can choose to not overlay these layers. Sprend the money and get it, get the best, have no regrets. Okay?


I would not mind paying $30 for a nicely developed app, but RadarScope underdeveloped. For example I opted for the additional $10 annual subscription fee in order to display lightning strikes. But the strikes are nearly invisible on the map. And there is no lightening strike fade out time delay or audio sound when a strike happens. These features are available for free on at least one website. Additionally, the black background is nice for nighttime, but why all the time. How about an option for a daytime sat map viewing? Or an option to list the temps across the displayed region? Very minimal information at a price that suggests a lot more should be happening. For those considering purchasing RadarScope: google lightning strikes. The results will lead you to surprisingly good websites showing lightning as well as nice radar (even one with an optional black background just like RadarScope).

love it!

I’m a sailor and do beercan racing in the late afternoons. I love this radar. It gives the track and speed of the storm cells, which is really helpful for me to plan whether or not it’s safe to head out, since I have to leave the dock 1 hour before racing starts!

View in Mac App Store
  • $29.99
  • Category: Weather
  • Updated:
  • Version: 2.2.3
  • Size: 27.2 MB
  • Language: English
  • Seller:

Compatibility: OS X 10.9 or later, 64-bit processor

Customer Ratings

Current Version:
All Versions:

Top In-App Purchases

  1. RadarScope Pro Subscription for Mac$9.99