What minimum visibility does the low-level prognostic chart indicate for areas with scalloped lines?

The correct interpretation of areas with scalloped lines on a low-level prognostic chart indicates visibility conditions ranging from three to five statute miles. This range represents the forecasted visibility expected in these regions, where the scalloped lines specifically denote environmental conditions that typically result in reduced visibility.

This information is crucial for pilots and meteorologists as it informs flight planning and safety considerations. Understanding these visibility levels helps professionals make informed decisions regarding navigation and operational procedures in varying weather conditions, aligning with the benchmarks provided on the prognostic chart.