National Weather Service United States Department of Commerce
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Last Map Update: Mon, Aug. 21, 2017 at 2:42:09 pm CDT

National Weather Service Corpus Christi, TXNational Weather Service Corpus Christi, TXNational Weather Service Corpus Christi, TX
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Here's our best forecast for the peak of partiality here in the Rio Grande Valley, around 115 PM Monday afternoon (Aug. 21). The best opportunity for minimal clouds will be at the beach/nearshore Gulf waters, and across the Upper Valley/Rio Grande Plains. However you choose to view the "crescent" sun here, be sure to do so safely! Keep tabs of our eclipse situation, including updated forecasts and social media posts, at: http://www.weather.gov/source/crh/eclipse.html?sid=bro
A trough of low pressure, associated with the remnants of Harvey, continues to produce a large area of disorganized showers and thunderstorms over the northwestern Caribbean Sea. Some development of this system is still possible before it reaches the coast of Belize or the Yucatan Peninsula early Tuesday. The disturbance is forecast to move into the Bay of Campeche early Wednesday, where environmental conditions are expected to be more conducive for redevelopment. Impacts to the RGV are still uncertain at this moment; however, be sure to stay up on the latest at weather.gov/rgv and hurricanes.gov.
Partly cloudy skies expected today across much of deep south Texas and the Rio Grande Valley with isolated showers and thunderstorms possible over the Gulf waters and along the sea breeze late this morning into this afternoon in mainly coastal counties. High temperatures will top off in the mid 90s to a few degrees beyond 100. A light chop on the bay will build to a moderate chop this afternoon as winds shift East. Gulf seas of 1-3 feet nearshore and 2-4 feet offshore. For those heading out to view the solar eclipse today, don’t stare at the sun without proper eye protection. If you can see anything other than the sun through your eclipse glasses, you are not protected.
A low risk for rip currents is expected today along the beaches of South Padre Island and at Boca Chica. Even though the rip current risk is low today, life threatening rip currents are still possible, especially in the vicinity of the South Padre Island Jetties. Continued warmth with highs in the low 90s and extreme UV values. There is a chance of showers and thunderstorms late this morning into this afternoon. For those out to view the solar eclipse, do not stare at the sun without proper eclipse glasses. If you can see anything other than the sun through your glasses, you are not protected. Have fun!
Isolated showers and thunderstorms will be expected over the coastal counties through midweek, primarily along the sea breeze. Increased moisture off of the Gulf will lead to higher chances of showers and thunderstorms Thursday into the weekend. Temperatures remain hot with highs in the mid 90s to a few degrees beyond 100. Overnight lows remain near normal in the mid and upper 70s.
Brownsville: Yesterday's high temperature was 2 degrees above normal and the low was normal. The record high temperature of 101 degrees was set in 1986. The record low temperature of 70 degrees was last set in 1910. No rainfall was reported at Brownsville South Padre Island International Airport. The daily rainfall record of 1.48 inches was set in 1878. Harlingen: Yesterday's high temperature was 3 degrees above normal and the low was normal. The record high temperature of 103 degrees was last set in 1943. The record low temperature of 65 degrees was set in 1931. No rainfall was reported at Valley International Airport. The daily rainfall record of 2.21 inches was set in 2015. McAllen: Yesterday's high temperature was 4 degrees above normal and the low was 2 degrees above normal. The record high temperature of 105 degrees was last set in 2009. The record low temperature of 71 degrees was set in 1967. No rainfall was reported at McAllen Miller International Airport. The daily rainfall record of 2.21 inches was set in 2015.

 
Latest Hourly Observations Across South Texas
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Notes:
  • In the Location column, click on links for a list of recent observations at sites of interest. A new window will open.
  • In the Wind column, the letter indicates direction the wind blows from (N=North, E=East, S=South, W=West, NE=Northeast, etc). VRB is "variable" and G is "gust". Wind speeds are in MPH.
  • In the Baro (pressure) column, values are in inches.
  • The Heat column indicates the Heat Index, or "Feels Like" Temperature. "N/A" will be displayed if values are not available or less than 85 degrees.
 
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