It mostly depends on your area. The warm fronts I have tracked and observed generally produced cumulus humulus, which form by latent heat, but not to often do they produce severe weather. Generally cumulus humulus,and occassionally, stratus in the early morning hours.
The wispy curling cloud is most likely a cirrus cloud, which is high-altitude and appears thin and wispy. This type of cloud can signal an approaching warm front due to the uplift of warm, moist air that results in the formation of these high-level clouds. As the warm front approaches, it may bring changes in weather conditions such as increasing cloud cover, rising temperatures, and the potential for precipitation.
A warm front is likely approaching if you see cirrus clouds high in the sky. These clouds are indicators of an advancing warm front because they form at high altitudes where warm air is being lifted over the cooler air present ahead of the front. This lifting of warm air can produce cirrus clouds, which are composed of ice crystals and are often thin and wispy in appearance.
The approach of a warm front. Cirrus clouds typically form ahead of a warm front, followed by cirrostratus and then altostratus as the front approaches. This sequence of cloud types indicates increasing moisture and the potential for precipitation.
When a warm front and a cold front get close, the warm air rises over the denser cold air, causing it to cool quickly and condense into clouds. This interaction can lead to the formation of precipitation and potentially severe weather.
cunomibious
tornadoes start when a warm front and a cold front pass each other and form a funnel cloud.
stratus
"A warm front brings light to moderate continuous rain and fog" this is from What weather does a warm front bring? What weather does a cold front bring? - Yahoo! Answers
At a warm front, warm, moist air advances over cooler, denser air. As the warm air rises, it cools and condenses, leading to cloud formation and often resulting in steady precipitation. This gradual lifting of warm air can create extensive cloud cover and prolonged rain, typically associated with a warm front. The transition may also bring a noticeable change in temperature and humidity as the warm air replaces the cooler air.
Warm, moist air is typically forced upwards along a front. When a warm front meets a cold front, the less dense warm air rises over the colder, denser air. This upward movement can lead to cloud formation and precipitation as the warm air cools and condenses.
An Altostratus cloud describes a gray cloud, usually seen in a flat or sheet formation. These clouds tell us that a warm front is coming. Sometime these clouds are made from ice crystals.
A warm front typically brings gradual weather changes as warm air overtakes cool air. This can result in prolonged periods of gentle rain or drizzle, followed by warmer temperatures and clearing skies as the front passes. Cloud cover and humidity tend to increase as the warm front approaches.