Winter Precipitation For Rio Grande Valley

RIO GRANDE VALLEY:

THE NATIONAL WEATHER SERVICE IN BROWNSVILLE, TX HAS ISSUED OUT A WINTER STORM WATCH FOR BROOKS, KENEDY, HIDALGO, WILLACY, AND CAMERON COUNTIES…EFFECTIVE THURSDAY AFTERNOON THROUGH FRIDAY MORNING.

A WIND CHILL WARNING REMAINS IN EFFECT FROM 6 PM CST THIS EVENING THROUGH 3 PM CST THURSDAY FOR THE ENTIRE RIO GRANDE VALLEY.

A HARD FREEZE WARNING REMAINS IN EFFECT FROM 6 PM CST THIS EVENING THROUGH 3 PM CST THURSDAY FOR THE ENTIRE RIO GRANDE VALLEY, EXCEPT FOR COASTAL REGIONS.

A FREEZE WARNING REMAINS IN EFFECT FOR COASTAL CAMERON AND COASTAL WILLACY COUNTIES FROM 6 PM CST THIS EVENING THROUGH 3 PM THURSDAY.

PLEASE KEEP PEOPLE, PETS, PLANTS AND PIPES IN MIND WHEN DEALING WITH COLD WEATHER LIKE THIS. STAY TUNED TO YOUR LOCAL NEWS AND THE NATIONAL WEATHER SERVICE FOR FURTHER UPDATES.

———————————————————————————

It has been a cloudy and very cold day in the RGV.  The arctic cold front has really made its presence felt and will continue for the next couple of days.  Brutal winds from the north will continue making temperatures feel much colder than what they really are.  Here were today’s high and low temperatures:

Brownsville:  44(recorded at 12:17 am CST this morning)/ 32
Harlingen:  40 (recorded around midnight CST this morning)/31
McAllen:  42(recorded around midnight CST this morning)/32

Although tonight will be cloudy, temperatures will still plummet to the mid-to-upper 20s by midnight, dropping to the lower 20s after midnight.  Coastal areas will see temperatures in the lower 30s, but below or at freezing level.  Winds will be out of the north between 8-15 mph.  Wind chill values will be frigid, ranging from 9°F to 20°F around the Valley.  This is very dangerous cold air that has serious consequences if outdoors too long.  There is a slight chance (20%) of freezing drizzle and sleet around the coastal areas late tonight.  Please use extreme caution if driving.

(2/3/2011): Thursday will be the coldest day of the week and year, so far.  Thursday morning lows will be in the lower 20s, in the upper-Valley, to lower 30s in the lower-Valley.  I expect the entire Valley to be below freezing until the sun rises.  However, some areas in the mid-and-upper Valley may remain below 32°F even after noon.  Winds will still be brutal out of the north between 12-16 mph, with higher gusts at times.  This will make wind chill values in the upper teens/lower 20s.  Beginning Thursday afternoon, abundant, warm low level moisture will override the cold air, in which rain/freezing drizzle/sleet will begin to fall over the lower-and-mid Valley.  There is a 20% chance of light rain, then turning into sleet, for the mid-and-upper Valley in the afternoon; a 30% chance of rain, turning into freezing rain and sleet for the lower-Valley.  Precipitation chances increase for Thursday night into Friday morning.  There is a 60% chance of sleet and snow for the mid-and-upper Valley Thursday evening.  It is hard to tell when the transition of rain to sleet/snow will occur, but it could be as soon as mid-afternoon to early evening.  I wouldn’t be surprised if light snow/sleets accumulations formed on cars and cold surfaces; .5″ accumulations at best, although it depends how long it precipitates.  There is an 80% chance of freezing drizzle/sleet for the lower-Valley Thursday evening.  Ice accumulations of up to .25″ are possible, enough to bring power lines down!  This will make driving conditions almost impossible if you are not used to driving on ice! Please stay home or indoors and only drive IF YOU HAVE TO! I DO expect school closings on Friday, especially in the lower-Valley.  Starr County will see some precipitation, but won’t see as much as the rest of the Valley; they will most likely see snow flurries, if anything. Thursday night lows will be cold, in the lower-to-mid 20s.  Winds will be out of the north, calming down a bit at 6-11 mph.

(2/4/2011): Snow/Sleet/Freezing drizzle will continue into Friday morning.  Once the sun rises, what’s left of precipitation will begin turning back into rain.  Morning lows will be in the lower-to-mid 20s/upper 20s in the lower-Valley.  Wind chill values will be in the teens.  Clouds will be gradually clearing after noon, with highs reaching the lower-40s.  Winds will be out of the north at 11-16 mph, with wind chill values still in the 30s and 20s!  By Friday night, skies will be clear with lows in the lower 30s, with light northerly winds.. near calm.

(2/5/2011): Things warm up by Saturday, with highs forecast to reach the lower 60s.  Skies will be mostly sunny with westerly winds at 4-9 mph.  Saturday night will be mostly clear with lows in the lower 40s.  Winds will be turning out of the south-southeast at  5-10 mph.

Edinburg 3-day Forecast:

(2/3/2011): 34/22…Wind chill values as low as 10°F…Cloudy…20% chance of rain/sleet (day)…60% chance of sleet/snow (evening)..Winds N at 12-17 mph
(2/4/2011): 42/24…Wind chill values as low as 15°F in the morning…Clearing skies….40% of sleet/snow (morning)…Winds N at 14-19 mph
(2/5/2011): 63/30…Sunny…Winds W at 2-7 mph.

CLICK on image to enhance quality.

 

Figure 1. Upper-Level Low over West Texas will provide lift near the surface, thus precipitation for the RGV. Solid black lines are lines of constant height (thousands of meters). Colored shadings are upper-level (500mb) wind jet streaks. Stronger the jet streak, the more unstable the atmosphere is.

About Brian

University of Oklahoma graduate with a degree in Meteorology. Follow me on Twitter: @WeatherInformer
This entry was posted in Weather. Bookmark the permalink.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s