Pockets of heavy rain will continue overnight...mainly east of I-35. Flash Flood threat is diminishing across the west and Hill Country.
...AREA OF CONCERN...Mainly along and east of Interstate 35. There is a Flash Flood Watch until 7 am Saturday for counties along and west of I-35 including the Hill Country and counties along the Rio Grande. Flash Flood Watch may get cancelled early later tonight.
...IMPACTS...Tropical downpours with rain rates higher than 2 inches per hour. There have been several reports across the area of 1-2 inches of rain in just 15 minutes. Rain totals over the next 6-12 hours east of Interstate 35 will average 2 to 4 inches, with some spots receiving up to 6 inches of rain. Areas in the Hill Country and along the Rio Grande can expect additional rains up to 1 inch, with isolated higher totals. Urban and small stream flooding is still possible through the evening and night time hours. Those attending Friday night football games should be prepared for rain, be ready to seek shelter in buildings or cars if lightning develops, and be extremely careful driving home after the game and not try to drive anywhere where water covers the road. Turn around, don't drown!
...TIMING...Locally heavy rain threat east of I-35 will continue mainly for the next 6-12 hours, or through early Saturday morning. Elsewhere overnight, areas can expect pockets of light to moderate rain lasting at least through midnight and still lingering into Saturday morning.
...DISCUSSION...Tropical moisture from Pacific system Manuel has combined with a cold front to produce locally heavy rain. Isolated rain totals of 4-7 inches have occurred across the Hill Country and upstream of Lake Amistad along the Rio Grande River. A cold front is pushing southeast across the state and at 4 pm is located along Interstate 35. As the front continues to push southeast, showers and storms will continue to form along and ahead of the system producing locally heavy rains and minor flooding problems. The lack of rainfall over the past few months will allow for much of the rain to soak in across the coastal plains so we are not looking for widespread flash flooding east of the Interstate 35 area. If the current radar trend continues with only light to moderate rains over the far west and Hill Country...the Flash Flood Watch may be cancelled later tonight. Some areas that experienced intense rainfall earlier today will continue to be impacted by closed roads and flooded low water crossings.
Several rivers over the far west including the Pecos, Devils, and Rio Grande saw a large rise this morning and reached flood stage at a few locations. These levels will continue to be high through the night and any additional significant rainfall will make the river levels increase even further. Residents along creeks, streams, and rivers need to pay close attention to the forecast and monitor water levels overnight.
The latest forecasts and watches/warnings/advisories are on the Austin-San Antonio National Weather Service website at www.weather.gov/Austin