textproduct: Huntsville
This forecast discussion was created in the public domain by the National Weather Service. It can be found in its original form here.
KEY MESSAGES
Updated at 1014 AM CDT Tue Sep 1 2026
- A Heat Advisory has been issued 11 AM Wednesday through 8 PM Saturday due to Major to Extreme HeatRisk along with afternoon heat indices rising up to 105-109 degrees.
NEAR TERM
(Rest of Today and Tonight) Issued at 1014 AM CDT Tue Sep 1 2026
As an upper level ridge remains steady over the Tennessee Valley, sfc high pressure and resultant dry/hot conditions will be prevalent once again today. High temperatures are forecast to warm into the mid to upper 90s with heat indices up to around 100-104 degrees. While a few spots may reach heat indices of 105, this will not be widespread enough to warrant a Heat Advisory for this afternoon. Low temperatures are forecast to drop into the low to mid 70s accompanied by dew points in the upper 60s. Calm winds and clear skies should support a low chance of patchy fog development primarily along large bodies of water. If any fog is realized, it should dissipate shortly after sunrise.
SHORT TERM
(Wednesday through Friday) Issued at 1014 AM CDT Tue Sep 1 2026
The pattern of hot and dry conditions is not forecast to change through the short term as the upper level ridge and subsequent sfc high pressure remain slugged over the area. Major to Extreme HeatRisk is forecast over portions of the area through the end of the work week. This, paired with WBGT values in the 88-90 degree range and heat indices up to 105-109 degrees, has inspired the issuance of a Heat Advisory beginning at 11 AM Wednesday and continuing through 8 PM Saturday. High temperatures are forecast to reach the mid to upper 90s during this time with little relief overnight as lows drop into the 70s. On Wednesday, there is a low chance (10-20%) of temperatures reaching 100 degrees in areas affected by urban heat island (MSL, HSV). If this is realized, it will be the first 100 degree day of 2026 (and hopefully the only one!). If you have outdoor plans this week, be sure to remain hydrated and seek shade when outdoors to avoid heat illness.
LONG TERM
(Friday through Monday) I issued at 840 PM CDT Mon Aug 31 2026
Not much change is expected in the overall weather pattern as we head through the long term period. Dangerous heat continues to be a threat through at least Sunday with Heat Risk forecast to remain at moderate (level 2 of 4) to major (level 3 of 4). The upper level ridge remains entrenched over the central and southeastern US with high pressure dominant underneath. As a result, hot and dry conditions continue through the weekend. While we cannot rule out a low (10-20%) chance of an isolated thunderstorm each afternoon, confidence is quite low in this occurring and most locations will likely remain dry. Afternoon highs each afternoon will rise into the mid to upper 90s with heat indices between 100-105F. The dome of high pressure begins to recede back to the west on Monday, which will provide some relief to the heat with afternoon highs only in the lower 90s. However, models continue to trend later with this occurring and it will be something we will watch as we get closer in time.
AVIATION
(18Z TAFS) Issued at 1152 AM CDT Tue Sep 1 2026
VFR conditions are forecast through the TAF period at both KMSL and KHSV. A low chance of patchy fog is forecast tonight, primarily along large bodies of water. Confidence is too low in this effecting the terminals to include this in the TAF at this time.
HUN WATCHES/WARNINGS/ADVISORIES
AL...Heat Advisory from 11 AM Wednesday to 8 PM CDT Saturday for ALZ001>010-016.
TN...Heat Advisory from 11 AM Wednesday to 8 PM CDT Saturday for TNZ076-096-097.
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