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TTR Weather Update for De Witt, Fayette, Gonzales, and Lavaca Counties from National Weather Service Austin – San Antonio.

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Locally Heavy Rainfall Possible over Portions of South Central Texas late this Afternoon through Tuesday…

Area of Concern:

Greatest risk across the Hill Country and into the I-35 corridor (including both Austin and San Antonio metro areas). It is also possible for some of the higher rainfall totals to extend into parts of the southern Edwards Plateau and Rio Grande.

Threats & Impacts:

Rainfall: 1-3 inches of rainfall possible across the Hill Country and I-35 corridor. Isolated pockets 5 to 7 inches are possible across the Hill Country and areas along and west of Interstate 35 (Black outlined area in graphic). Some locations across this area could experience flash flooding of small streams, creeks, and low water crossings. The rainfall could result in localized minor to moderate river flooding.

IMG_3773

Timing and Overview:

A cold front will interact with abundant moisture to produce a high chance for showers and storms across the region late this afternoon through Tuesday morning. Our confidence have increased on higher rainfall amounts and timing of heaviest rain as latest Hi-Res models are in fair agreement on the potential for locally heavy rain. The time frame for heaviest rain is expected to occur from 7 pm this evening through 7 am Tuesday.

Confidence:

Moderate to High

Additional Information Resources:
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
Sincerely,

Orlando Bermudez, Jared Allen, and Brett Williams

NWS Austin / San Antonio

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