As we’ve been saying Houston has to get through one more bout of potentially heavy rain before seeing a reprieve from this wet pattern—and that bout is coming. In anticipation of that the National Weather Service has placed the entire region under a flash flood watch from 10am CT today through midnight.
Although conditions are dry at the surface, just above the surface moisture is starting to stream in from the Gulf of Mexico, and we’re going to see very high levels of atmospheric moisture today. At the same time a large upper-level system is moving in from the west, bringing with it the capability to lift this moisture upward. This lift will help to generate moderate, and then heavy rain later this morning and during the afternoon hours.