According to the IPMA bulletin, on the islands of São Miguel and Santa Maria, which make up the Eastern group, the yellow warning for precipitation is valid between 22:00 today (23:00 in Lisbon) and 12:00 on Wednesday.
On the islands of Faial, Pico, São Jorge, Graciosa, and Terceira, the yellow warning has been in force since 06:00 and will be valid until 24:00 today.