This is likely to be a bad spring for lawn weed problems. The summer water restrictions coupled with a wet fall is the perfect combination to create lots of weed issues. A fall application of pre-emergent is a good way to help minimize having weed issues in the spring. Some types of grass like common Bermuda are always going to be more prone to having weed issues because of the sparse density. Zoysia and At. Augustine tend to have the least problems with weeds.