Flash flooding is a growing risk in the southwestern U.S. through this weekend. The reason is a tropical storm headed inland from the Pacific Ocean.

The NWS has been tracking the surge of moisture from Priscilla as it shifts northward. On Thursday, the NWS Weather Prediction Center warned that Phoenix and Winslow, Arizona, faced a moderate risk of flash flooding, in which there was at least a 40 percent chance of flash flooding.

Hurricane Priscilla was beginning to lose some punch but was still a powerful Category 2 storm off Mexico's Pacific coast, the Miami-based National Hurricane Center says.

Tropical Storm Raymond has formed in the eastern Pacific Ocean. It is the third system now off the western coast of Mexico. The U.S.

Tropical Storm Priscilla could bring heavy rain and a “significant” risk of flash flooding to the southwestern U.S. through this weekend, forecasters warn.

Priscilla could bring flash flooding through the weekend across the U.S. Southwest, the U.S. National Hurricane Center in Miami said.

The worst conditions will spread north this weekend. Forecasters warned people on the shores of Delaware and New Jersey to prepare for major coastal flooding.

The high-water mark of Saturday afternoon has subsided, but additional rain is forecasted for Monday and Tuesday, according to officials. No injuries or deaths have been reported.

The end of the week could feel different, with remnants of Priscilla poised to bring rain, wind and humidity to San Diego County.

Moisture from the remnants of a tropical system is moving through Colorado today, leading to periods of heavy rain across the western third of the state, and shower chances in southern Colorado.