Documentation for /json/outlook_progression.py

This service requires a latitude and longitude point along with a date of interest. The service will return the coincident SPC or WPC outlooks valid for that date.

Implementation Notes

1. In the case of hatching, two entries are returned per outlook per category.
2. Off cycle outlook updates are encoded as cycle=-1.
3. An attempt is made at the null / no outlook situation, but it is not perfect.

Changelog

• 2026-02-26: Renamed top level generation_time metadata to generated_at for better IEM app consistency.
• 2024-11-26: Initial implementation

Example Usage

Provide the progression of convective outlooks for a point on 5 August 2024:

https://mesonet.agron.iastate.edu/json/outlook_progression.py?lat=39.9&lon=-85.9&valid=2024-08-05&outlook_type=C

Same request, but return an Excel file:

https://mesonet.agron.iastate.edu/json/outlook_progression.py?lat=39.9&lon=-85.9&valid=2024-08-05&outlook_type=C&fmt=excel

Same request, but return a CSV file:

https://mesonet.agron.iastate.edu/json/outlook_progression.py?lat=39.9&lon=-85.9&valid=2024-08-05&outlook_type=C&fmt=csv

CGI Arguments

The following table lists the CGI arguments that are accepted by this service. A HTTP GET request is required. Fields of type Multi-Params or CSV value can accept either a comma separated list or multiple parameter and value combinations. For example, ?foo=1&foo=2 is equivalent to ?foo=1,2.