628
FXUS64 KHUN 020728
AFDHUN
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HUNTSVILLE AL
228 AM CDT WED SEP 2 2026
..NEW NEAR TERM
KEY MESSAGES
UPDATED AT 813 PM 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
(TODAY)
ISSUED AT 228 AM CDT WED SEP 2 2026
EARLY MORNING TEMPERATURES HAVE FALLEN TO THE LOWER 70S UNDER
CLEAR SKIES ACROSS THE TENNESSEE VALLEY. LIKE THE REST OF THIS
WEEK, TODAY WILL FOCUS ON DANGEROUS HEAT AS UPPER RIDGING REMAINS
CENTERED OVER THE TN VALLEY. THE COMBINATION OF AIR TEMPERATURES
IN THE UPPER 90S AND DEWPOINTS IN THE LOW TO MID 70S WILL BRING
AFTERNOON HEAT INDICES TO THE 103-109 DEGREE RANGE. BECAUSE OF
THIS, A HEAT ADVISORY WILL BE IN EFFECT STARTING AT 11AM TODAY
THROUGH SATURDAY. LARGE SCALE SUBSIDENCE WILL KEEP CLOUD COVER TO
A MINIMUM, PROVIDING NO RELIEF FROM THE HEAT. PLEASE REMEMBER TO
PRACTICE HEAT SAFETY EVEN IF ONLY SPENDING A SHORT TIME OUTDOORS
BY STAYING HYDRATED, WEARING LIGHT COLORED CLOTHING, AND NEVER
LEAVING PEOPLE OR PETS UNATTENDED IN VEHICLES!
SHORT TERM
(WEDNESDAY NIGHT THROUGH FRIDAY)
ISSUED AT 813 PM CDT TUE SEP 1 2026
THE AFOREMENTIONED HEAT ADVISORY WILL REMAIN IN EFFECT THROUGH
8 PM SATURDAY AS MAJOR (LEVEL 3/4) TO EXTREME (LEVEL 4/4) HEAT
IMPACTS WILL CONTINUE LATE THIS WEEK. THIS WILL INCLUDE THE
OVERNIGHT HOURS AS LIMITED RECOVERIES WILL OCCUR WITH LOWS ONLY
DROPPING TO THE MID TO UPPER 70S. WITH THE RIDGE OF HIGH PRESSURE
AND HEAT DOME DIRECTLY OVER THE AREA, DAYTIME HIGHS WILL CLIMB
INTO THE 95 TO 100 DEGREE RANGE IN MOST LOCATIONS EACH DAY.
COMBINED WITH DEWPOINTS IN THE 70S, THIS WILL CONTINUE TO CREATE
HEAT INDEX VALUES BETWEEN 105 TO 109 DEGREES BOTH DAYS. STRONG
SUBSIDENCE FROM THE RIDGE WILL SIGNIFICANTLY LIMITED CLOUD COVER
AND ANY POTENTIAL FOR CONVECTION (WITH POPS AROUND 5% OR LESS BOTH
THURSDAY AND FRIDAY). IF YOU HAVE OUTDOOR PLANS THIS WEEK, BE
SURE TO REMAIN HYDRATED AND SEEK SHADE WHEN OUTDOORS TO AVOID HEAT
ILLNESS.
LONG TERM
(FRIDAY NIGHT THROUGH TUESDAY)
ISSUED AT 813 PM CDT TUE SEP 1 2026
THE UPPER LEVEL RIDGE OVER MUCH OF THE CENTRAL AND SOUTHEASTERN US
WILL PERSIST INTO THIS WEEKEND; HOWEVER, IT LOOKS LIKE AN UPPER
TROUGH TRIES TO DIG SOUTH OVER THE NORTHEAST, POTENTIALLY BREAKING
DOWN THE RIDGE OVER THE APPALACHIANS, OHIO VALLEY, AND TENNESSEE
VALLEY SOMEWHAT DURING THIS TIME. THIS MAY BE SHORT-LIVED, SINCE
SYNOPTIC GUIDANCE SUGGESTS THAT THE RIDGE WILL BUILD BACK OVER THE
SOUTHEAST THROUGH EARLY NEXT WEEK. AT THE SURFACE, HIGH PRESSURE OVER
THE APPALACHIANS MAY BE OVERTAKEN BY A BACKDOOR COLD FRONT SLATED TO
MOVE INTO THE REGION FROM THE NORTHEAST BY SUNDAY. SOME GUIDANCE
HINTS THAT THIS FEATURE MAY BRING ENOUGH MOISTURE AND LIFT WITH IT TO
PRODUCE AT LEAST A LOW CHANCE OF SHOWERS AND STORMS THIS WEEKEND,
BUT THESE TRENDS WILL BE MONITORED. BY EARLY NEXT WEEK, SURFACE HIGH
PRESSURE BUILDS BACK OVER THE APPALACHIANS AS THE UPPER RIDGE TAKES
HOLD OVER THE REGION ONCE AGAIN.
OVERALL, THE HOT AND HUMID CONDITIONS ARE EXPECTED TO CONTINUE
THROUGH THE LONG TERM PERIOD. EXPECT HIGHS IN THE MID TO UPPER 90S
THROUGH THE WEEKEND WITH NOT MUCH RELIEF AT NIGHT AS LOWS MERELY DIP
INTO THE UPPER 60S TO LOWER 70S. THESE TEMPERATURES, ALONG WITH DEW
POINTS IN THE LOWER TO MID 70S, WILL RESULT IN HEAT INDICES IN THE
100-106 DEGREE RANGE ALONG WITH WBGTS IN THE MID TO UPPER 80S (SOME
SPOTS AROUND 90 DEGREES) AND MODERATE TO MAJOR HEATRISK (LEVELS 2 AND
3 OF 4) FOR MOST OF NORTH ALABAMA AND SOUTHERN MIDDLE TENNESSEE. BY
EARLY NEXT WEEK, THE AFOREMENTIONED BACKDOOR FRONT MAY TEMPER THE
HEAT AND HUMIDITY SLIGHTLY. HIGHS IN THE LOWER TO MID 90S WITH DEW
POINTS IN THE UPPER 60S TO LOWER 70S ARE ANTICIPATED, KEEPING THE
HEATRISK IN THE MODERATE RISK CATEGORY, HEAT INDICES GENERALLY
BETWEEN 98-103 DEGREES, AND WBGTS SOLIDLY IN THE 83-87 DEGREE RANGE.
ULTIMATELY, THE CURRENT HEAT ADVISORY RUNS THROUGH SATURDAY EVENING;
HOWEVER, WE WILL BE MONITORING IF A FURTHER EXTENSION INTO SUNDAY
BECOMES NECESSARY.
REMEMBER TO PRACTICE HEAT SAFETY, ESPECIALLY IF YOU WORK OUTSIDE OR
HAVE OUTDOOR ACTIVITIES! STAY HYDRATED, TAKE PLENTY OF BREAKS IN THE
SHADE, AND NEVER LEAVE PEOPLE OR PETS IN VEHICLES!
AVIATION
(06Z TAFS)
ISSUED AT 1046 PM CDT TUE SEP 1 2026
VFR CONDITIONS WILL PREVAIL THROUGH THE PERIOD WITH LIGHT WINDS
AND A MOSTLY CLEAR SKY.
HUN WATCHES/WARNINGS/ADVISORIES
AL...HEAT ADVISORY FROM 11 AM THIS MORNING TO 8 PM CDT SATURDAY FOR
ALZ001>010-016.
TN...HEAT ADVISORY FROM 11 AM THIS MORNING TO 8 PM CDT SATURDAY FOR
TNZ076-096-097.
NEAR TERM...25
SHORT TERM....AMP
LONG TERM....26
AVIATION...AMP
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