I’ve seen temperature differences between these two symbols when I clicked on them: a blue circle (or semi-circle) and the blue weather flags. Why?
The blue weather flags are automated weather stations with instruments that are set to take a reading every set interval. In some cases, these devices are in remote areas and the interval is set to every 15 minutes, for example. The blue circle or semi-circle are actual, live reports from ODOT crew members that have been to the location and relayed the road and weather conditions. In some cases the blue circles represent a location that has a mile point range, rather than a fixed position. Crews provide reports (blue circles or semi-circles) five times per day and at other times when conditions change significantly. The daily reporting times are approximately 4:00 AM, 7:00 AM, 9:30 AM, 1:30 PM, and 8:30 PM. Actual reporting times can vary depending on crew availability and the locations they are working.
Related Questions
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