Polar air mass causes widespread cold and large thermal amplitude in the interior of the Northeast

The advance of a polar air mass between July 7 and 12, 2025, is expected to promote temperature reduction in part of the Northeast, with emphasis on the states of Alagoas (AL), Bahia (BA), and Sergipe (SE). According to model analysis, a sudden drop is not expected, but the pattern will be of colder early mornings and predominantly dry weather in the interior, a factor that provides significant thermal amplitude – that is, a strong variation between early morning minimums and afternoon maximums. On the coast, ocean-sourced humidity maintains a forecast of intermittent rain, of weak to moderate intensity. Detailed Scenario – Bahia Concentrates the Most Intense Cold According to projections, Bahia will record the lowest minimum temperatures, especially in the central-south and west. Between July 9 and 12, regions like Barreiras stand out with the lowest forecast minimum (6.1°C in isolation on the 10th). Persistent cold is observed in locations such as Jequié (9.5°C on 7/9), Bom ...