Manage notifications from Weather on Mac
You can receive notifications about government-issued severe weather alerts or when precipitation is about to start or stop at a location. (Not available in all countries or regions.)
Manage notifications by location
Note: Before you can set up notifications in Weather, you must allow notifications from Weather in Notification Center. See Turn Weather notifications on or off, below.
In the Weather app
on your Mac, choose Weather > Settings.For each location, select or deselect any of the following checkboxes:
Severe Weather: Receive notifications about government-issued severe weather alerts.
Next-Hour Precipitation: Receive notifications when precipitation, such as rain or snow, is about to start or stop.
Note: The options available change depending on whether the notification is available for a select country or region.
Turn Weather notifications on or off
On your Mac, choose Apple menu
in the sidebar. (You may need to scroll down.)Go to Application Notifications on the right, click Weather, then turn “Allow notifications” on or off.
Note: To display notifications from Weather when a Focus is on, see Set up a Focus.
Change Weather notification options
You can change the Weather notification alert style and choose options for time-sensitive alerts, add a badge to the app icon, play a sound for the notification, and more.
On your Mac, choose Apple menu
Go to Application Notifications on the right, click Weather, then do any of the following:
Click the Weather alert style you prefer: None, Banners, or Alerts.
Turn notification options on or off.
Use the pop-up menus to choose options for notification previews and grouping.
For more information about the alert and notification options, click the Help button 
in the bottom-right corner of the settings window.