FXUS64 KBRO 141720
AFDBRO

Area Forecast Discussion
National Weather Service Brownsville TX
1220 PM CDT Tue May 14 2024

...New AVIATION...

.SHORT TERM...
(Today through Wednesday)
Issued at 342 AM CDT Tue May 14 2024

The latest surface analysis depicts a weak cold from near Rio 
Grande City extending eastward to Edinburg to Harlingen then off 
the Lower Texas Coast. Temperatures range from the mid to upper 
60s across the northern ranchlands to the lower 70s across the Rio
Grande Valley with light north to northwest winds. The moist 
soils from very recent rainfall combined with light winds may lead
to patchy fog across the area, especially across the northern 
ranchlands and the Lower Valley. The frontal boundary is expected 
to continue to push south of the Rio Grande River later this 
morning. Highs today will range from the lower 80s at the beaches,
low to mid 90s across the Rio Grande Valley and the upper 90s to 
around 100 degrees across the Rio Grande Plains. Will lean towards
a blend of the NBM/CONSShort for temperatures and dewpoints for 
today, as the NBM appears a little too warm. Light to moderate 
north to northeast winds will prevail today. Skies will become 
mostly cloudy tonight with lows falling into the 70s, a few 
locations could drop into the 60s across the northern ranchlands. 
In addition, patchy fog is possible again tonight, mainly across 
portions of the Brush Country. Southeast winds are expected to 
return on Wednesday which will provide for another warm day. Highs
on Wednesday will generally be in the 90s, except for the 80s 
near the coast. Heat indices will range from 102 to 108, mainly 
across the Rio Grande Valley.

Finally, continued slightly elevated seas will result in a Moderate 
Risk of rip currents at the local beaches through Wednesday. 

&&

.LONG TERM...
(Wednesday Night through Monday)
Issued at 342 AM CDT Tue May 14 2024

A weak cold front is forecast to intrude into the BRO CWFA on
Friday. This will produce a shot of isolated showers/thunderstorms
at that time, while the remainder of the long term period remains
generally dry. 

Of greater concern will be the return of above normal daytime high
temperatures. When combined with relative humidity percentages, a
Heat Advisory may be needed for portions of Deep South Texas and
the Rio Grande Valley on Thursday. Afterwards, an influx of dry 
air in the wake of the aforementioned cold front will produce heat
index values approaching, but not meeting or exceeding, established
Heat Advisory criteria. 

&&

.AVIATION...
(18Z TAFS)
Issued at 1220 PM CDT Tue May 14 2024

VFR will prevail through the forecast period at all TAF sites with
clear skies to FEW/SCT cloud cover. However, there will be a 
brief period of MVFR visibility possible between 11-13Z Wednesday
morning as patchy fog develops. Otherwise, winds will continue to
slowly shift to the east and southeast this afternoon with speeds
generally around 10-12 knots. Wind speeds will fall below 10 
knots overnight, and increase to around 10 knots by mid morning on
Wednesday.

&&

.MARINE...
(Today through Wednesday)
Issued at 342 AM CDT Tue May 14 2024

A weak pressure field across the Western Gulf will provide light 
to moderate winds and low to moderate seas along the Lower Texas 
Coast. Northeasterly winds today will become easterly tonight and 
southeasterly on Wednesday as high pressure moves eastward across 
the northern Gulf.

(Wednesday Night through Monday)
Although a weak cold front will intrude into the western Gulf of
Mexico on Friday, high pressure will be the dominant feature 
along the Lower Texas Coast. Generally moderate winds and seas
will prevail, and Small Craft Exercise Caution and Small Craft
Advisory are not anticipated to be needed during the period. 

&&

.PRELIMINARY POINT TEMPS/POPS...
BROWNSVILLE             92  73  91  80 /  10   0   0   0 
HARLINGEN               94  70  92  77 /  10   0   0   0 
MCALLEN                 97  73  95  80 /  10   0   0   0 
RIO GRANDE CITY         97  70  96  78 /   0   0   0   0 
SOUTH PADRE ISLAND      84  77  84  80 /  10   0   0   0 
BAYVIEW/PORT ISABEL     88  73  88  78 /  10   0   0   0 

&&

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

$$

SHORT TERM...63
LONG TERM....66
AVIATION...22-Garcia