ASA: Flag Major Changes in Fire Spread using the Initial Spread Index

**As a** FBAN/Fire Centre staff

**I need** to see significant changes in potential Fire Behaviour from previous days to today

**So That** I can predict changes which catches us by surprise and are a safety concern; continued fire behaviour advisories lead to complacency #humanfactors

**Acceptance Criteria**
- [ ] Given the HFI is over 10,000 kw/m, When there is a significant increase actual OR forecasted (from 10K to 20K HFI for example) in HFI due to wind, Then that area is shown in ASA
- [ ] Given a rapid increase in Temp and a rapid decrease in RH, When an area shows significant in HFI, Then that area is shown in ASA
- [ ] Given an area received some Precip followed by rapid increase in Temp and decrease in RH, When an area is forecasted over 4K kw/m HFI that area is shown in ASA

**Additional Context**
- Eric + Sam to provide guidance on " Significant Change ": https://bcgov-my.sharepoint.com/:w:/g/personal/samuel_siddall_gov_bc_ca/Ef9BqIsw7MBAtjGxTOloOiwBRUGMfxR9ll6j_QnYjRNsng?e=G8cJLp
- enter text here

**Definition of Done**
https://github.com/bcgov/wps/wiki/Definition-of-Done

Start with the linked SharePoint guidance from Eric and Sam to define “significant change,” then trace how ASA currently receives and displays HFI, temperature, humidity, precipitation, and wind data. The issue names no files or tests; done means the three acceptance criteria are implemented and verified against the Definition of Done.

Written by the indexing model from the issue text.