Tightly packed concentric circles of isobars on a weather map may indicate what weather phenomenon?

Tightly packed concentric circles of isobars on a weather map are indicative of a hurricane. Isobars represent lines of equal atmospheric pressure, and when they are closely spaced, it indicates a steep pressure gradient. This steep gradient typically occurs in intense weather phenomena, such as hurricanes, which are characterized by low pressure at their center and increasing pressure as you move outward. The tight isobars around the low-pressure center reflect strong winds that are characteristic of a hurricane, as air moves rapidly from high-pressure areas to lower pressure. In contrast, other weather phenomena like droughts or large high pressure areas do not typically show such tightly packed isobars. Sunny skies would generally be associated with less variability in pressure, resulting in more widely spaced isobars.