The name Blas has been used for eight tropical cyclones in the eastern Pacific Ocean and one medicane in the Mediterranean Sea.
In the Eastern Pacific:
- Tropical Storm Blas (1980), never threatened land
- Tropical Storm Blas (1986), did not affect land
- Tropical Storm Blas (1992), never affected land
- Hurricane Blas (1998), Category 4 hurricane that paralleled southwestern Mexico before moving out to sea
- Tropical Storm Blas (2004), never affected land
- Tropical Storm Blas (2010), remained over the open sea
- Hurricane Blas (2016), Category 4 hurricane that never threatened land
- Hurricane Blas (2022), Category 1 hurricane that paralleled southwestern Mexico coastline causing flooding
In the Mediterranean:
- Storm Blas (2021), affected the Balearic Islands, Sardinia and Corsica.