Heavy rainfall has begun a bit earlier than anticipated and the threat will continue through Memorial Day. There is a threat of severe weather as well this weekend.
Area of Concern:
All of South Central Texas
Threats & Impacts:
Widespread 1-4 inches expected through Memorial Day with isolated amounts up to 6 inches possible. South Central Texas has experienced a significant amount of rainfall over the past couple weeks so soils are very saturated. This will result in a high vulnerability to flash flooding with any heavy rain that develops. Areas that have already experienced flash flooding recently will be at the highest risk. However, flash flooding could result anywhere where heavy rains develop. Additionally, with river levels already elevated, the threat for rivers to reach flood stages will exist during the weekend.
There is a slight risk of severe storms tonight and Sunday with the line of storms that moves through the area. Damaging winds will be the main threat but cant rule out an isolated tornado. A slight risk of severe storms is also expected on Monday. Damaging winds, hail, and isolated tornadoes will all be possible on Monday.
Timing and Overview:
***A Flash Flood Watch is now in effect through 7 pm CDT Sunday***
Showers and thunderstorms have already developed across western portions of the area and a Flash Flood Warning was issued overnight. The threat of heavy rain will continue to move east today with scattered to numerous showers and storms expected this afternoon. Widespread showers and storms are expected later this evening through Sunday morning as a line of storms moves from west to east across the area.
Heavy Rainfall: Very High
Flash Flooding: High
River Flooding: High
Severe Weather: Low-Moderate
Additional Information Resources:
· NWS Austin / San Antonio Contact Numbers: 800-292-5508 or 830-606-3617
· NWS Austin / San Antonio Webpage: http://www.weather.gov/sanantonio
· Online Flood Reporting: http://www.srh.noaa.gov/StormReport/SubmitReport.php?site=EWX
· Sign up to be Rainfall Observer: http://cocorahs.org/Application.aspx
· AHPS River Forecasts: http://water.weather.gov/ahps2/index.php?wfo=ewx