Despite the fact Labor Day started with bright sunshine and warm temperatures, parts of the Katy area will be under a flash flood watch beginning this evening and continuing all day Tuesday.
The National Weather Service has issued the flash flood watch for a number of counties in southeast Texas, including Fort Bend.
Other counties under the watch include Austin, Brazoria, Colorado, Jackson, Matagorda and Wharton.
At this time, Harris and Waller counties have not been included in the watch.
The warning comes as a result of Tropical Storm Hermine moving ashore in northern Mexico later tonight. While the Katy area is not in the path of the storm, significant amounts of Gulf moisture will stream into the area resulting in the chance for locally heavy rainfall and flooding.
“Tropical Storm Hermine is forecast to move inland along the coastline of south Texas or northern Mexico late tonight and track northwest into the Rio Grande Valley Tuesday, then into west Texas on Wednesday. Rain chances will increase through the day today and expect precipitation to become widespread overnight and Tuesday,” the National Weather Service said in issuing the warning.
Locally heavy rain and training cells are likely, and parts of the Katy area can expect one- to three-inch rainfall amounts through Tuesday, with the potential for significantly higher amounts where training precipitation occurs.
“Some forecast models are depicting a distinct surface boundary developing between the coast and Interstate 10 later tonight. Should this boundary actually develop, it could become a focusing mechanism for intense rainfall leading to much higher rainfall totals,” the weather service said.
Chances of rainfall will increase to 50 percent this afternoon and 60 percent tonight. The chance of rain for Tuesday is 80 percent.
Monday’s high temperature is expected to reach 90 degrees under increasingly-cloudy skies, with an overnight low of 75.
