As an alternative to the Severe Weather Alert API, you can also use the Azure Maps Tropical Storm Forecast API Get Tropical Storm Forecast or the Azure Maps Active Tropical Storms API Get Tropical Storm Active if you are only interested in tropical storm info for a given area.
Updated answer addressing the questions.
- The Azure Maps Tropical Storm API basins are based on official government boundaries for each tropical basin. You can use the following NOAA link to see which countries fall into which basin -- https://www.nhc.noaa.gov/aboutrsmc.shtml. The Philippines falls into the Northwest Pacific (NP) basin.
- Once you get the storms for the basin of interest from the Tropical Storms Search API (i.e.: https://atlas.microsoft.com/weather/tropical/storms/json?subscription-key=YourKey&api-version=1.1&year=2023&basinId=NP), you can then use the Tropical Storm Locations API (https://atlas.microsoft.com/weather/tropical/storms/locations/json?subscription-key=YourKey&api-version=1.1&year=2023&basinId=NP&govId=1&details=true&radiiGeometry=true) to get the details of the tropical storm trajectory (direction, bearing, polygon/geometry, etc.).
- Severe weather alerts are in real time.
- There is no specific consistent radius around severe weather alerts as it can vary by alert, so you’d need to use coordinates that are in and around the areas of the Philippines that are of interest (i.e.: more densely populated areas).