For once, the radar is mostly quiet this morning. The reprieve in showers won’t last too long, however.
Pressures have risen over the Houston metro area as the region has fallen under the western edge of a large area of high pressure anchored over the southeastern United States. This is going to bring a couple of more typical August days to Houston, with highs in the low- to mid-90s, a fair amount of sunshine and some scattered showers during the afternoon hours.
As one would expect toward the end of August, the Atlantic tropics are starting to heat up, and we may see both a Gaston and a Hermine within the next week. As of 1pm CT on Monday, here’s the state of play in the Atlantic tropics.
The red blob on the right is Invest 90L, and it’s soon to become Tropical Storm Gaston. I feel pretty confident that that’s all we’re going to gave to say about Gaston as a threat, because it has the look of a “fish storm,” meaning the system will probably recurve before it reaches the United States. We may have some concerns down the road about this being a threat to Bermuda, but I don’t think it gets that far west.
Unfortunately we can’t be so dismissive about the orange blob, which is Invest 99L. The system remains rather disorganized right now, and due to the influence of dry air the National Hurricane Center only gives 99L a 50 percent chance of developing into a tropical storm or depression during the next five days.
While the system may not develop it’s expected to drift toward the Bahamas by this weekend. Here’s a look at the GFS model forecast positions for the “low” associated with 99L by Sunday night:
It has been quite a different middle of August for the greater Houston region. During the last eight days the high temperature has stayed in the 80s for six of those days, with a maximum of 92 degrees. And the rain. We’ve had lots of it. The greater Houston metro area has recorded 4 to 16 inches of rain during the last two weeks—an uncharacteristically wet spell for the dead of summer.
Here’s a rainfall accumulation map for the last 14 days:
It has been a partly to mostly sunny day for much of the Houston with a few rain showers developing across the city. But the second half of the weekend and into Monday looks notably wetter.
For tonight heavy rain will remain to the west of Houston, most concentrated over the Hill Country. A stalling cold front along with ample moisture will set the table for potentially flooding rains in the San Antonio and Austin areas. Forecast models support the idea of some areas receiving in excess of 10 inches of rain between Saturday morning and Sunday night.
