What's your question? Ask

It sounds like your root stock is trying to grow. This is not healthy for the tree, and this sucker should be removed. Most citrus trees sold today are grafted plants. The scion (the top part that is the tree you grow) is attached to a more resilient rootstock (the part that grows under the ground). It makes for a more resilient plant. But sometimes the rootstock will try to assert its upper growth to replace the scion. Since all rootstocks are of inferior quality in terms of leaf and fruit growth, it is best to remove the suckers from the rootstock so that it does not eventually replace the entire scion.

This article will help you: https://www.gardeningknowhow.com/edible/fruits/lime/lime-tree-leaf-drop-why-a-lime-tree-is-losing-leaves.htm

Yellow leaves are more often than not a sign of overwatering. Feel the soil around your plant to see if it is too wet. If so, stop watering. Plant stress can be another factor, such as a sudden change in temperature. Since it is outside and you stated it was cold, this could definitely be affecting the tree, as they do not like cold conditions. You may want to consider bringing it indoors if the weather gets too cold.

This is typically a sign of a root problem. Either something is attacking the roots or the plant is over fertilized and this is killing the roots. If possible, check for signs of root damage and have your soil tested to see if over fertilization is the problem.

It sounds like it is lacking nutrients, either nitrogen or iron. Give the tree some fertilizer that contains both these nutrients.

Wind is much less of a problem than soil moisture, drainage, and most other cultural considerations. Here's an article that will give you some pointers: https://www.gardeningknowhow.com/edible/fruits/lime/care-of-your-kaffir-lime-tree.htm