IPMA will place 11 districts in mainland Portugal under a yellow warning due to cold. The warning will be in effect throughout Friday and into the early hours of Saturday.

IPMA will place 11 districts in mainland Portugal under a yellow warning due to cold. The warning will be in effect throughout Friday and into the early hours of Saturday.

IPMA is the Portuguese Institute of the Sea and Atmosphere (Instituto Português do Mar e da Atmosfera), the national agency for weather, marine forecasts and climate monitoring. Residents should watch its forecasts and warnings during storms, heatwaves or cold snaps because IPMA issues official advisories used by services, transport operators and local authorities.