textproduct: Huntsville

KEY MESSAGES

Updated at 741 PM CDT Sat Sep 26 2026

- A warming trend will take place this week with increasing humidity yielding a Moderate Heat Risk in some areas. - Low chances of thunderstorms exist late next week into the weekend.

NEAR TERM

(Tonight) Issued at 741 PM CDT Sat Sep 26 2026

A complex map this evening with a 5h ridge extending from the western Gulf of America into the middle MS Valley, with an array of shortwaves across the Upper Midwest south through the southern PLains. Flow from these waves across this ridge was spilling various CI/CS/AC clouds into the TN Valley this evening making for a beautiful sunset. This after a warm and dry day with dew points dropping into the 30s to lower 40s (RH values dipping into the 10-20% range) in far north AL and southern middle TN. Moister air with dew points in the 50s were still located south of the TN River. For tonight, the clouds will continue to stream into the region with a light or calm northerly wind.

SHORT TERM

(Sunday through Tuesday) Issued at 741 PM CDT Sat Sep 26 2026

The upper ridge will be flattening tonight into Sunday, allowing a continues northwest flow aloft. Surface high pressure over the Great Lakes into the Appalachians will continue to advect dry air southward, so despite shortwaves dropping southeast into the mid South and lower MS Valley, rain is very unlikely due to dry low to mid levels. Virga would be the only item of note on Sunday entering northwest into central AL. Will watch trends, but keeping the forecast dry. Highs on Sunday will be in the upper 70s to lower 80s with dew points in the 40s, if not upper 30s in some spots depending on mixing. Another item to watch closely in future updates.

Similar weather will persist Sunday night (lows in the lower 50s) and Monday (highs in the upper 70s to near 85) as northeast flow in low levels keeps a dry lower atmosphere with dew points in the 40s once again. A weak shortwave meanders east into the OH and TN valleys on Tuesday, but the atmosphere will be too dry to support much if any cloud cover. The dry air and slightly higher 8-9h temps will support highs in the middle to upper 80s. Dew points may edge just a bit further into the lower 50s in most areas with a more southeasterly wind component.

LONG TERM

(Tuesday night through Saturday) Issued at 741 PM CDT Sat Sep 26 2026

We will begin to transition patterns in the long term period as upper ridging expands over the Plains and eventually into the Southeastern region. This will bring warming temperatures and an increase in humidity toward the mid-late week timeframe. In fact, highs on Wednesday will reach into the upper 80s to lower 90s with dewpoints climbing into the 60s. Thankfully we will be spared from a more intense heat wave this time with temps in the lower 90s and dewpoints near or below 70 degrees. With that said, afternoon heat indices will still reach the low to mid 90s during the Wed-Fri timeframe and could pose a risk for heat related illness for those especially sensitive to heat.

The forecast, especially as we head into the weekend, becomes a lot less uncertain as we will remain in a warm, tropical airmass ahead of an approaching upper wave. There are still fairly significant spatial and temporal differences amongst longer range models regarding the speed of an incoming cold front that is progged to impact the TN Valley next weekend. With this in mind, we will stick with blended guidance and message increasing chances (30-65%) for showers and thunderstorms next weekend. Be sure to check back for updates throughout the week especially if preparing for outdoor plans!

AVIATION

(00Z TAFS) Issued at 442 PM CDT Sat Sep 26 2026

VFR flight weather conditions are forecast.

HUN WATCHES/WARNINGS/ADVISORIES

AL...None. TN...None.