Brownsville, Texas 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

290
FXUS64 KBRO 131802
AFDBRO

Area Forecast Discussion
National Weather Service Brownsville TX
1202 PM CST Tue Jan 13 2026

...New DISCUSSION, AVIATION, MARINE...

.KEY MESSAGES...
Updated at 1149 AM CST Tue Jan 13 2026

 - There is a low (15-30%) chance of intermittent light rain or
   drizzle late this afternoon into the early nighttime hours
   tonight.

 - A cold front is expected to pass through the region Wednesday
   evening into Wednesday night.

 - A Small Craft Advisory is likely for the Lower Texas coastal
   waters Wednesday night into Thursday as strong northerly winds
   behind the front leads to adverse marine conditions.


&&

.DISCUSSION...
Issued at 1149 AM CST Tue Jan 13 2026

A mid-level trough moves eastward over central Texas today,
passing north of our region, with slight upper level divergence
and a weak jet aloft continuing into tonight, generating a low
(15-30%) chance of rain from a line of isolated to scattered
light showers or drizzle, moving east from the Northern Ranchlands
and Mid/Upper RGV this afternoon and exiting the Lower RGV
tonight. Ahead of the line, light northerly winds shift to
southwesterly as the line exits, becoming light westerly by
Wednesday morning and northerly by the evening hours, influenced
by lower level winds shifting ahead of a ridge and cold front
diving into the Southern Plains. The cold front passes through
Deep South Texas and the Rio Grande Valley Wednesday evening into
Wednesday night, leading to breezy conditions near and along the
immediate Lower Texas Gulf coast, with northerly winds of around
20-25 mph and gusts up to 30 mph. Thursday into Friday, winds
subside and become southerly by Friday as a surface high pressure
shifts east from the Southern Plains to the northeastern Gulf.
Another ridge flies southeastward over the Plains on Friday,
sending another cold front, possibly late Friday night into
Saturday, shifting winds out of the northeast through Saturday and
gradually becoming southeasterly by Monday. As moisture rebuilds
into the region next week, there could be an increase in PoPs to
a low (15-30%) chance of rain along the coast Monday, expanding
inland into Tuesday.

Near to slightly below average temperatures today (highs in the 60s)
and tonight (lows in the 40s/50s) become above average on Wednesday
as skies begin to clear and downsloping westerly winds raise highs
into mostly the 70s to near 80 F. Temperatures falling back to
the 40s/50s overnight Wednesday as skies become mainly clear
behind the front, allowing for efficient radiational cooling. Cold
air advection via northerly to northeasterly winds cool
temperatures back to the 60s on Thursday before 70s return on
Friday with morning lows in the 40s/50s continuing into the
weekend.

A moderate risk of rip currents continues through Wednesday
afternoon.

&&

.AVIATION...
(18Z TAFS)
Issued at 1149 AM CST Tue Jan 13 2026

There is a low (15-30%) chance of intermittent light rain or
drizzle at KMFE and KHRL this evening into the early nighttime
hours as well as at KBRO late this evening into tonight, mentioned
in the PROB30s, which could result in periods of MVFR ceilings
and/or visibility. Following, there could be a brief period of
LIFR/IFR ceilings around sunrise Wednesday morning due to elevated
moisture. VFR conditions return soon after, with light westerly
winds becoming northwesterly by the afternoon hours with clearing
skies.

&&

.MARINE...
Issued at 1149 AM CST Tue Jan 13 2026

Gentle northerly winds become light westerly winds by Wednesday
morning along with slight (1-2 feet) seas along with a low
(15-20%) chance of patchy light rain or drizzle. Winds turn
northwesterly, enhancing to moderate to fresh late Wednesday
morning into the afternoon. A Small Craft Advisory is likely
Wednesday night into Thursday as a cold front passes through the
Lower Texas coastal waters, bringing strong northerly winds and
moderate (6-8 feet) seas, followed by improving conditions
Thursday afternoon into Thursday night. Winds become southerly
along with slight (1-2 feet), possibly by Friday morning, with
gentle to moderate southeasterly winds continuing through the
weekend with a potential weak cold front Friday night or Saturday
as well as building chances of rain next Monday.

&&

.PRELIMINARY POINT TEMPS/POPS...
BROWNSVILLE             69  53  78  52 /  10  20   0   0
HARLINGEN               68  48  78  46 /  10  20   0   0
MCALLEN                 68  51  80  49 /  20  20   0   0
RIO GRANDE CITY         66  44  78  44 /  20  10   0   0
SOUTH PADRE ISLAND      67  59  74  58 /  10  20   0   0
BAYVIEW/PORT ISABEL     69  51  78  52 /  10  20   0   0

&&

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

$$

SHORT TERM...65-Irish
LONG TERM....65-Irish
AVIATION...65-Irish