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Nowcast

• 

• Now as of 4:48 am CST on February 13, 2012

  Through 7 am...areas of light rain...drizzle and fog will affect deep south Texas and the Rio Grande Valley. Visibilities will generally range from 2 to 4 miles. Only trace amounts of rainfall are expected.

Next 12 Hours

Forecast data from the National Digital Forecast Database.

5 Day Forecast

• Monday
• 
• High: 77 °
• Low: 61 °
• Chance of Rain

• Tuesday
• 
• High: 76 °
• Low: 65 °
• Mostly Cloudy

• Wednesday
• 
• High: 79 °
• Low: 65 °
• Chance of Rain

• Thursday
• 
• High: 76 °
• Low: 59 °
• Chance of Rain

• Friday
• 
• High: 72 °
• Low: 59 °
• Mostly Cloudy

Area forecast discussion 
National Weather Service Brownsville Texas 
445 am CST Monday Feb 13 2012 


Short term /today through Tuesday/...light rain and drizzle will 
continue through sunrise today as overrunning pattern continues. 
Most of these showers are moving to the north/northwest at around 
20 to 25 miles per hour across the Rio Grande Valley under overcast skies. 
Little accumulation is expected with this activity. Southeast 
winds will begin to weaken and shift to the south as a surface 
high pressure migrates eastward. Temperatures today will rebound 
into the 70s across the County Warning Area. Precipitation will diminish in the 
late morning hours as a weak cold front pushes through the rgv 
later this afternoon. Southerly winds will briefly shift westerly 
with the passage of the weak front. Tonight's low will be in the 
mild side compared to Sunday night as the air mass with this front 
is not too cold. Tuesday southeasterly flow at the surface returns 
bringing a surge of moisture into the area. High temperatures will 
warm back up into the high 70s. Not much precipitation expected 
for Tuesday. 


Long term /Tuesday night through Sunday/...the long term forecast 
period will be marked by the Wednesday passage of a cold front and 
the potential development Friday of an area of low pressure along 
the Lower Texas coast due to the approach and passage of a filling 
500 mb low pressure system through the Lone Star state. This 
pattern...coupled with a general southwest-to-northeast middle-level 
flow...will result in isolated to scattered showers for deep south 
Texas and the Rio Grande Valley through much of the period. Not 
until Saturday afternoon through Sunday...when the middle-level flow 
becomes markedly more zonal...do drier conditions return. Expect 
near to above normal temperatures during the daytime and at night 
with no major cold air intrusions. 
&& 


Marine...today through Tuesday...Small Craft Advisory conditions 
continue through this morning today for the offshore waters. This 
conditions will improve this afternoon and evening as the high 
pressure gradient weakens. Southerly flow will continue through 
Tuesday as the low pressure gradient that develops over the Gulf 
Coast will keep winds breezy. 


Tuesday night through Sunday...generally moderate winds and seas 
will prevail along the Lower Texas coast Tuesday night through 
Friday night as high pressure initially interacts with low pressure 
over the Texas Panhandle...followed by a cold front that will pass 
through the Lower Texas coast Thursday morning. Portions of the 
adjacent coastal waters of deep south Texas and the Rio Grande 
Valley will experience small craft exercise caution and/or Small 
Craft Advisory conditions during the Tuesday night through Friday 
night time frame. Winds and seas will then increase to more likely 
Small Craft Advisory criteria Saturday and Sunday due to a low 
pressure system that will develop over the western and central 
Gulf of Mexico that will interact with high pressure building 
south through Texas. 
&& 


Preliminary point temps/pops... 
Bayview/Port Isabel 75 63 77 67 / 40 0 0 10 
Brownsville 76 63 77 66 / 30 0 0 10 
Harlingen 74 59 78 65 / 30 10 0 10 
McAllen 75 60 79 67 / 20 0 0 10 
Rio Grande City 70 59 81 66 / 20 0 0 10 
South Padre Island 72 62 70 67 / 50 10 0 10 
&& 


Bro watches/warnings/advisories... 
Texas...none. 
GM...Small Craft Advisory until noon CST today for gmz150-155-170-175. 
&& 


$$ 


This product is also available on the web at: 
http://weather.Gov/rgv 


Short term...Torres-67 
long term...tomaselli-66 
fxc/meso...Campbell