High amounts of Gulf moisture is expected to stream into South Texas from the Gulf this week, leading to several days of hot and unseasonably humid conditions across the region. San Antonio will see temperatures in the 90s with heat index values expected to rise into the triple-digits — a rarity for October.
By late this week, however, forecast models show that a significant cold front is likely to push through the Lone Star State. While its exact strength is still uncertain, there’s potential that the front could bring truly autumn air, with low temperatures falling into the 50s — and even the 40s — in parts of South-Central Texas. Here’s the latest.
Monday’s forecast
A mild and muggy start is expected across the region Monday, as San Antonio temperatures will sit in the low to mid-70s through 9 a.m. From there, temps will rise steadily, reaching 85 degrees by around noon.
By the late afternoon, highs are expected to reach 90 to 91 degrees with partly cloudy skies overhead. The humidity will be very high, though, leading to heat index values as high as 99 degrees. If you have to be outside, be sure to stay hydrated and take frequent breaks in air-conditioned spaces.
With the increased atmospheric moisture, a few showers and storms are also possible during the afternoon and evening. San Antonio rain chances will be near 20% to 30%, so not everyone will see rainfall…