As we make our way through the remainder of the  weekend, there will be increasing atmospheric lift and atmospheric instability with the approach of an upper level low pressure disturbance from the west. We’ll see increasing rain shower and thunderstorm activity beginning late tonight into tomorrow. Initially, by later into the day tomorrow and tomorrow night, it appears that rainfall amounts could potentially result in localized, nuisance flooding problems especially in urban/small stream areas and low water  crossings.

By Memorial Day into Tuesday and Wednesday (and potentially into late week as well), the upper level low pressure disturbance coupled with an eastward slow moving and weakening cold front will move into the IH35 corridor as it loses its upper air steering currents and pulls up stationary in the vicinity of the IH35 corridor. As this occurs, it will cause additional atmospheric lift with slow moving rain showers and thunderstorms continuing. Periods of heavier rain appear quite likely; if this rainfall forecast verifies, flash flooding and river/stream flooding will become potentially more of a hazard.

The NWS/Weather Prediction Center updated rainfall guidance, from earlier today, now suggests that the IH35 corridor and a fairly wide area from north Texas (Dallas/Ft Worth area) south southwestward to Waco to Austin to San Antonio and then into the coastal plains and southeastern Texas may see upwards of 3 to 4 inches of rain – isolated higher amounts are certainly possible – over the next seven day period.

(Image Courtesy: NWS/Weather Prediction Center & NWS/West Gulf River Forecast Center)