Area Forecast Discussion
Issued by NWS Brownsville, TX

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FXUS64 KBRO 251904
AFDBRO

Area Forecast Discussion
National Weather Service Brownsville TX
204 PM CDT Tue Jul 25 2017

.SHORT TERM (Now through Wednesday Night): The KBRO upper air
sounding from around sunrise this morning indicated a precipitable
water value of 2.02 inches (an increase from 1.28 inches 24 hours
earlier), and as a result, isolated showers have broken out along
the sea breeze boundary and east of the Interstate 69C corridor.
Streamer shower activity will affect the Lower Texas coastal
waters tonight, and with deep tropical moisture remaining in
place, similar conditions to today and tonight are anticipated for
Wednesday and Wednesday night. Unfortunately, not enough clouds
and precipitation will exist to prevent temperatures from reaching
well above normal values.

.LONG TERM (Thursday through Tuesday): The deep tropical moisture
present during the short term portion of the forecast will wane
during the long term portion, with precipitable water values
decreasing to, and persisting near, the 1.50 inch mark instead of
the 2.0 inch value. Simultaneously, broad 500 mb high pressure
centered over the southern half of the Four Corners region will
build farther south and southeast. This pattern will prevent any
convection for the inland areas, with the only possibility of
convection being over the adjacent coastal waters Sunday night
through Monday night. Above normal daytime highs and overnight
lows will continue to be the rule.
&&

.MARINE (Now through Wednesday Night): Surface high pressure
centered over the southern portion of Louisiana will provide
generally moderate winds and seas along the Lower Texas Coast
during the period. Small Craft Exercise Caution and Small Craft
Advisory are not likely to be needed.

Thursday through Tuesday: Surface high pressure will continue to
be the dominant feature over the western Gulf of Mexico, with
continued mainly moderate winds and seas for the Lower Texas
coastal waters. Small Craft Exercise Caution and Small Craft
Advisory continue to be unlikely for this period.
&&

.PRELIMINARY POINT TEMPS/POPS...
BAYVIEW/PORT ISABEL  79  94  80  93 /   0  20   0   0
BROWNSVILLE          79  94  79  95 /   0  20   0   0
HARLINGEN            78  98  78  98 /   0  20   0   0
MCALLEN              79 101  79 100 /   0   0   0   0
RIO GRANDE CITY      79 102  78 101 /   0   0   0   0
SOUTH PADRE ISLAND   82  89  81  89 /  20  20   0   0
&&

.BRO WATCHES/WARNINGS/ADVISORIES...None.
&&

$$

This product is also available on the web at:
HTTP://WEATHER.GOV/RGV

Short Term and Long Term...Tomaselli-66



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