Tornadoes are accompanied by the same color lightning that you would see in any other storm. It can be white, orange, pink, blue, or violet.
Since tornadoes are a form of weather, they would be predicted by a meteorologist.
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Tornadoes are more likely to occur in the late afternoon and early evening, between 3 p.m. and 7 p.m. This is when there is a combination of warm, moist air near the surface and cool, dry air aloft, creating favorable conditions for tornado formation.
Tornadoes themselves cannot be seen from space because they are blocked from above by the thunderstorms that produce them. The link below shows a storm satellite of a storm system that was producing tornadoes at the time the picture was taken. The tornadoes themselves formed under the storms that are seen as the right-hand branch of the spiral-shaped system. Again, what you are seeing is the storm that produced the tornadoes, not the tornadoes themselves. At this resolution individual tornadoes would be too small to see anyway.
Hail and tornadoes would most likely be associated with a cold front or dry line.
cold front
A cold front is most likely to bring hail and tornadoes into an area. As the cold front advances, it forces warm, moist air to rise rapidly, creating instability that can lead to severe thunderstorms, hail, and tornado development.
Tornadoes, hail and other forms of severe weather most often form ahead of cold fronts.
Severe thunderstorms most often occur ahead of cold fronts.
A cold front is most likely to bring hail and possible tornadoes into an area because of the rapid lifting of warm, moist air ahead of the front, creating unstable conditions conducive to severe weather. The cold front also provides the necessary temperature gradient and dynamics for the formation of strong thunderstorms capable of producing hail and tornadoes.
Hail and tornadoes are most often associated with cold fronts, but can occur with dry lines or, lest often, warm fronts.
A cold front would likely bring hail and possible tornadoes into an area. This is because cold fronts are characterized by the rapid lifting of warm, moist air, which can generate severe thunderstorms with hail and tornadoes. Additionally, the clash between the cold dense air behind the front and the warm moist air ahead of it creates an unstable atmosphere favorable for severe weather.
Cold weather. If a front was moving off the Pacific at the same time, you would see snow.
Cumulonimbus clouds are associated with thunderstorms, heavy rain, lightning, and strong winds. They can also bring hail and tornadoes in severe cases.
An occluded front typically brings overcast skies, prolonged periods of rain or snow, and cooler temperatures. It can also cause strong, gusty winds to develop as the front passes through an area.
Contrary to the common layperson's explanation, tornadoes are not triggered by the collision of a warm front and a cold front. This is based on a misreading of the statement that tornadoes form from a collision of warm and cold air masses along a cold front, which is itself an oversimplification. The front itself does not directly trigger tornadoes. When a warm and cold air mass collide, the warm air is forced up because it is less dense. If this warmer air mass is unstable enough, the collision can trigger strong thunderstorms. This is a very common occurrence, and most of the resulting storms will not produce tornadoes. If the storms are strong enough and wind conditions are right, these storms may then develop the strong rotation needed to produce tornadoes.