The inner circle is the most recently reported METAR, color-coded as LIFR, IFR, MVFR, or VFR. If there is a TAF for the airport, it is the larger circle and is color-coded for the current time. For example, in your screenshot above the time is 21:24. You can see at a glance which airports are matching the current forecast, which are better than the forecast, and which are worse than the forecast. Spotting a trend can help you make a decision to continue/turn around/delay departure. Good luck with this week's storms.