South Texas Weather Forecast
Weather forecast for October 17, 2017
October 17 – 19, 2017
Daily Weather Forecast
South Texas Weather Modification Association

Weather Discussion:
Clear and chilly this morning across south Texas, with temperatures in the mid 30’s over hill
country to lower 50’s near the coast.  A few low lying locations in hill country might be below
freezing for the next hour or so.  Strong high pressure continues across the region today, with
mostly sunny skies.  Dry air will help the temperatures warm up quickly today, with highs in the
mid to upper 70’s.  Mostly clear overnight tonight with low temps in the upper 40’s, lower 50’s
with cooler temps over hill country.  Hill county could drop into the lower to mid 30’s overnight.  
Would not be surprised if Frost Advisories are issued tonight for parts of hill country.

As high pressure slowly begins moving away from the region on Wednesday, expect partly
cloudy skies with slowly increasing temperatures.  Wednesday highs in the upper 70’s, lower 80’
s.  Mostly clear to partly cloudy overnight Wednesday, with low temps in the upper 50’s, lower 60’
s with cooler temps over hill country.  Warmer air from the Gulf continues to move into the region
on Thursday, with partly cloudy skies and perhaps isolated showers along the coast.  Thursday
highs in the upper 70’s, lower 80’s.  A weak system looks to pass through eastern TX on Friday,
with isolated afternoon rain possible east of San Antonio both Friday and Saturday.  

Daily normal (F): high 82, low 60

Pilots (STWMA): no cloud seeding today.

Today: Mostly sunny.  High temperatures in the mid to upper 70’s.  Northerly winds 0 – 10 mph
with stronger gusts possible.

Tonight: Mostly clear.  Low temps in the upper 40’s, lower 50’s with cooler temps over hill
country.  Northeasterly winds 0 – 10 mph.

Wednesday: Partly cloudy.  High temps in the upper 70’s, lower 80’s.  Mostly clear to partly
cloudy overnight.  Low temps in the lower to mid 50’s.  Southeasterly winds 0 – 10 mph.

Thursday: Partly cloudy with isolated afternoon showers along the coast.  Highs in the upper 70’
s, lower 80’s.  Partly to mostly overnight.  Lows in the lower to mid 60’s.  Southeasterly winds 0 –
10 mph.

Extended: Isolated afternoon rain possible mainly east of San Antonio both Friday and Saturday
(October 14).  


Forecast Notes:
Temperatures are in Fahrenheit (F)
Wind speeds are in miles per hour (mph)
Rainfall amounts in inches (in.)
Visibility in miles

Rain chance terminology from lowest to highest chance: isolated, scattered, widespread.
South Texas Weather Modification Association