The weather map you described likely shows a cold front (indicated by the blue line with triangles) approaching a warm front (indicated by the red line with semicircles). In general:
- Cold fronts typically bring a significant drop in temperature and can lead to precipitation.
- Warm fronts can lead to rising temperatures and increased humidity.
In this case, since a cold front is approaching a warm front, the most valid prediction is:
A significant drop in temperature will occur across the area.
This is because the cold front is pushing into the warmer air mass, which generally leads to a temperature drop.