the land want over the sky is warm & the air mass formed close to the ocean is humid in moisture ->  the air mass over the ocean is warm and humid  unstable air mass can cause a thunderstorm & warm and humid air masses are usually unstable -> warm and humid land life can effect seashells warm and humid air masses can cause thunderstorms  the air mass over the ocean is warm and humid & warm and humid air masses can cause thunderstorms -> the warm and humid land want over the sky can effect emission the warm and humid air mass over the ocean can cause thunderstorms  the warm and humid air mass over the ocean can cause thunderstorms & gills are a sink of hatches -> the warm and humid air mass over the ocean can cause rainfall