Enter the airport ICAOs under IDs, separated by spaces or commas. Low ceilings/vis will be marked bold and red for easy use and toggling Filter Triggers shows only airports that fall below the low ceilings or visibility criteria. Enter desired Ceiling limit in feet such as 700 which will look for anything under BKN007 or OVC007. Enter visibility minimum such as 2 (statute miles) will look for anything under 2SM. Follow these example minimum amounts of 700' and 2SM for a recommended alternate minimum buffer to monitor and detect when an alternate in your list may possibly go below derived alternate minimums. Use 2000' and 3SM if you entered a destination list to easily track when a station's weather has been updated to require an alternate. Shift end: Enter day and hour in zulu of your last flight arrival such as 2321 for the 23rd day at the 21st hour. This will grey out and not highlight lines outside your shift. Toggle Apply Shift End to disable this feature. This web app is free to use with ad support. It is for informational purposes only, always verify your official sources, the developer will not be liable for any consequences from use of this site. © 2025 by Sadiom.