Good morning. Today is Juneteenth, a relatively new federal holiday that has its origins in Texas. Juneteenth is celebrated on the anniversary of Major General Gordon Granger arriving in Galveston and proclaiming freedom for enslaved people in Texas on June 19, 1865. This came two and a half years after the Emancipation Proclamation was issued.
Unfortunately, we will not have freedom from extreme heat today. Some very moderate relief will arrive later this week, as well as a slight chance for our first showers and thunderstorms in awhile. But it will probably be fleeting.

Monday, Tuesday, and Wednesday
For the first two or three days this week we are going to see conditions very much like what the region experienced over the weekend. That is to say, high temperatures of about 100 to the low-100 degrees with high humidity, leading to an extremely elevated heat index. An excessive heat warning is in effect for now through Tuesday, and we can probably expect that to continue through Wednesday. Please continue to take heat safety precautions when outdoors during the middle of the day.
Thursday and Friday
Sometime on Wednesday, the high pressure system that has dominated our weather for several days will begin retreating slightly to the west, allowing for a cloudier and slightly cooler period. The relief will be modest, with high temperatures likely in the mid- to upper-90s, but it should bring down the dangerous heat index for a few days. Some weak disturbances will also drive rain chances into the area for a couple of days. Do not expect much—most areas probably have a 10 to 30 percent chance of rain—but this is better than what we’ve seen for a week now.
Next weekend and beyond
The medium-term looks pretty hot, I’m afraid. At this point the most likely scenario is that the high pressure system starts to rebuild over Texas, including the Houston metro area. So we probably will see the return of triple digit temperatures, sultry humidity, and heat warnings. I wish it were otherwise.

Tropics
The Atlantic tropics are unusually frisky for this time of year, and we can probably expect the formation of Tropical Storm Bret within the next day or two. The storm, and an additional wave behind it, likely are of no consequence to Texas or the Gulf of Mexico. For full coverage of all things tropics, be sure and check out our new Atlantic hurricanes website, The Eyewall.
