Weather Resources - Online Cloud Guide

CUMULUS Congestus

• If clouds form from SW to NW, precipitation with gusty winds and thunderstorms or only wind squalls are likely within 5 to 10 hours.

CUMULUS Congestus

• Cloud tops forming altocumulus cumulongenitus usually brings precipitation in 5 to 10 hours, gusty winds, thunder showers, wind squalls.

CUMULUS Congestus

• If clouds form from SW to NW, precipitation with gusty winds and thunderstorms or only wind squalls are likely within 5 to 10 hours.

CUMULUS Congestus with Fracto Stratus

• Precipitation of long duration if winds from NE to S, or shorter duration with other winds.

CUMULUS with Vertical Growth

• Fair weather clouds building up vertically often indicate cumulus congestus and cumulonimbus which bring afternoon showers.

CUMULUS Humilis

• Fair weather clouds if they show no vertical development.
• Can build up and develop into cumulus congestus or cumulonimbus clouds.

CUMULUS Fractus

• Fair weather clouds broken up by strong winds.
• No precipitation unless winds steady NE to S, then cumulus fractus of bad weather.