Mostly clear. Lows in the upper 70s. Southeast winds 10 to 15 mph until early morning becoming light. Heat index readings 105 to 108 in the evening.
Tuesday
Partly cloudy in the morning then clearing. Highs around 100. Southeast winds around 10 mph shifting to the south 15 to 20 mph in the late morning and afternoon. Heat index readings 105 to 112.
Mostly clear in the evening then becoming partly cloudy. Lows in the upper 70s. South winds 10 to 15 mph. Heat index readings 105 to 109 in the evening.
Wednesday
Partly cloudy. Highs in the upper 90s. Heat index readings 105 to 114 in the afternoon.
Clear. Lows in the upper 70s. Heat index readings 105 to 110 in the evening.
Thursday
Sunny in the morning then becoming partly cloudy. Highs in the mid 90s. Heat index readings 105 to 108 in the afternoon.
Thursday Night
Clear in the evening then becoming partly cloudy. Lows in the mid 70s.
Friday
Mostly cloudy. Chance of thunderstorms. Highs in the mid 90s. Chance of rain 40 percent.
Friday Night
Cloudy in the evening then becoming mostly cloudy. Slight chance of thunderstorms in the evening. Lows in the lower 70s. Chance of rain 20 percent.
Saturday
Mostly cloudy. Chance of thunderstorms in the morning...then slight chance of thunderstorms in the afternoon. Highs in the mid 90s. Chance of rain 30 percent. Heat index readings 105 to 106 in the afternoon.
Saturday Night
Mostly cloudy. Lows in the mid 70s.
Sunday
Mostly cloudy. Slight chance of thunderstorms in the afternoon. Highs in the mid 80s. Chance of rain 20 percent.
... Heat advisory now in effect until 7 PM CDT Monday...
The heat advisory is now in effect until 7 PM CDT Monday.
A combination of high temperatures with high relative humidity will produce widespread heat index values of 110 to 115 degrees across the Rio Grande Valley Sunday and Monday afternoons. Overnight low temperatures will only lower between 75 to 82 degrees.
Precautionary/preparedness actions...
Managers of personnel working outside today and Monday should be aware of the need for plenty of breaks and ample water and rest for workers.
Children... the elderly and people with chronic ailments are usually the first to suffer from excessive heat. Cramps or in extreme cases heat exhaustion and heat stroke can result from prolonged exposure to these oppressive conditions. Please take the responsibility of checking on people who may be at risk today and Monday.
A heat advisory is issued when the heat index... a measure of how it feels when temperature and humidity are combined... equals or exceeds 111 for 2 hours or more during the day... and observed nighttime temperatures remain 75 degrees or above... for two consecutive days or more.
Record Report
Statement as of 2:30 am CDT on July 5, 2009
... Record high temperature set at Brownsville yesterday...
A record high temperature of 100 degrees was set at Brownsville yesterday. This breaks the old record of 98 degrees set in 1947.