Flood Potential Outlook
Issued by NWS Houston/Galveston, TX

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FGUS74 KHGX 212012
ESFHGX
220812-
PROBABILISTIC HYDROLOGIC OUTLOOK
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON, TX
212 PM CST THU JAN 21 2016

...Advanced Hydrologic Prediction Service (AHPS) long range probabilistic
   outlook for Harris County Watersheds in Southeast Texas...


The Houston/Galveston National Weather Service Office has
implemented Advanced Hydrologic Prediction Service (AHPS) for Harris
County Watersheds in Southeast 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: Greens Bayou at U.S.Hwy 59 in Houston has a flood
stage of 55 feet. There is a 50 percent chance the U.S. Hwy 59 forecast
point will rise above 48.0 feet during the next 90 days.

       Chance of exceeding stages at specific locations
               Valid [ 01/21/2016 - 04/20/2016 ]


Location        fs(ft) 90%  80%  70%  60%  50%  40%  30%  20%  10%
------------------------------------------------------------------
Spring Creek
 Tomball       165.2  143.3 145.5 146.8 147.7 148.4 149.0 149.6 150.0 151.0
Cypress Creek
 Katy-Hockley  157.3  149.5 151.7 153.6 154.8 157.0 157.7 158.4 158.7 159.4
 Grant Road     36.7  105.9 109.4 111.3 112.4 115.1 116.8 118.0 119.7 121.3
Greens Bayou
 Knobcrest St   84.8  71.0 72.3 72.7 73.3 73.9 74.2 74.6 75.0 76.7
 U.S. Hwy 59    55.0  44.6 45.7 47.0 47.6 48.0 48.5 50.1 51.0 52.1
 Ley Road       30.0  13.8 17.6 19.7 20.6 23.0 24.5 27.7 30.3 34.4
White Oak Bayou
 Heights Blvd   32.0   9.8 11.6 14.2 17.1 18.6 19.5 23.1 27.3 34.5
Brays Bayou
 Main Street    56.0  17.5 18.6 19.5 22.0 25.3 26.7 28.8 31.7 36.0
Buffalo Bayou
 West Belt      71.0   9.7 41.2 42.5 43.0 43.9 44.4 45.4 46.7 49.2
 Piney Point    52.0  31.9 33.4 34.3 35.1 36.0 36.9 38.2 39.2 41.6
 Shepherd Dr    28.0   5.2  6.2  7.3  9.0 10.9 12.0 13.7 16.2 20.1


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: www.srh.weather.gov/cgi-bin/ahps.cgi!hgx
(internet address is all lower case).

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

$$




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