Flood Potential Outlook
Issued by NWS Corpus Christi, TX

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FGUS74 KCRP 212051
351 PM CDT Thu May 21 2020

...Advanced Hydrologic Prediction Service (AHPS) long range
probabilistic outlook for the San Antonio River Basin in South

The Corpus Christi Texas National Weather Service office has
implemented Advanced Hydrologic Prediction Service (AHPS) for the
San Antonio River Basin in South Texas. AHPS enables the
National Weather Service to provide long-range probabilistic
outlooks. This service is also available on the Internet.

In the table below...The 90 through 10 percent columns indicate the
Chance the river could rise above the listed stage levels in the
Next 90 days. Example: The San Antonio River at Goliad has a
flood stage of 25 feet. There is a 50 percent chance the Goliad
forecast point will rise above 14.9 feet during the next 90 days.

        Chance Of Exceeding Stages At Specific Locations
                  Valid 05/20/2020 - 08/18/2020

Location      FS(ft)  90%  80%  70%  60%  50%  40%  30%  20%  10%
--------      ------  ---  ---  ---  ---  ---  ---  ---  ---  ---
San Antonio River
 Goliad         25.0   6.7  7.8  9.9 10.8 14.9 18.2 21.7 25.9 30.0

This long-range probabilistic outlook contains numbers that are
calculated using multiple scenarios from 50 years of historical
climatological and stream flow data. These numbers also take
into account current conditions of the river and soil moisture.
by providing the complete range of probabilistic numbers...The
level of risk associated with long-range planning decisions can
be determined.

Additional supportive data and explanation are available on the
Internet at:

Long-range probabilistic outlooks are issued around the third
Thursday of every month.



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