079
FXUS64 KHUN 241057
AFDHUN
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HUNTSVILLE AL
557 AM CDT WED JUN 24 2026
..NEW AVIATION
KEY MESSAGES
UPDATED AT 936 PM CDT TUE JUN 23 2026
- MEDIUM CHANCES OF DENSE FOG ARE FORECAST TONIGHT INTO EARLY
WEDNESDAY MORNING
- LOW CHANCES (30% OR LESS) OF SHOWERS AND THUNDERSTORMS
THURSDAY INTO FRIDAY
- MAJOR (LEVEL 3 OF 4) HEAT RISK DEVELOPS SUNDAY INTO MONDAY AND
CONTINUES THROUGH MID NEXT WEEK WITH HEAT INDEX VALUES OF
AROUND 100 TO 105 DEGREES
NEAR TERM
(TODAY)
ISSUED AT 357 AM CDT WED JUN 24 2026
HIGH THIN CLOUD COVER IS PUSHING EAST ACROSS NORTH CENTRAL ALABAMA
FROM THE NORTHWEST. SOME DENSE FOG HAS ALREADY DEVELOPED OVER THE
VALLEY AREAS OF JACKSON COUNTY, AL. CALM WINDS ARE IN PLACE ACROSS
THE AREA. THIN HIGH CLOUDS WILL ENCOMPASS ALL OF NORTHERN ALABAMA
AND SOUTHERN MIDDLE TENNESSEE OVER THE NEXT FEW HOURS. HOWEVER,
THEY ARE SO THIN AND HIGH THAT THEY WILL HAVE LITTLE EFFECT ON
RADIATIONAL COOLING. WITH MOST AREAS ALREADY SEEING DEWPOINT
DEPRESSIONS AT 0 DEGREES, THINKING WIDESPREAD DENSE FOG COULD
DEVELOP THROUGH EARLY WEDNESDAY MORNING. IT IS MOST CERTAIN
THOUGH IN NORTHEASTERN ALABAMA AND PORTIONS OF SOUTHERN MIDDLE
TENNESSEE, WHERE IT IS ALREADY FORMING AND SHOWING UP WELL IN
SATELLITE IMAGERY.
A DENSE FOG ADVISORY MAY NEED TO BE ISSUED SHORTLY OVER THE NEXT
HOUR OR SO FOR JACKSON (AL) AND FRANKLIN (TN) COUNTY. HOWEVER, IT
MAY NEED TO ENCOMPASS AREAS FURTHER WEST AS TIME GOES ON. TEMPERATURES
WILL LIKELY NOT CHANGE MUCH THROUGH 7 AM, BUT MAY DROP ANOTHER 1
TO 3 DEGREES. WHEN YOU WAKE UP, TEMPERATURES SHOULD MAINLY BE IN
THE UPPER 50S TO AROUND 62 DEGREES. FOG WILL LIKELY BE SLOW TO
BURN OFF WHERE IT IS DENSE, LIKELY HANGING AROUND UNTIL AT LEAST 9
AM IN THOSE AREAS. IT SHOULD BE A BIT WARMER TODAY WITH HIGHS
CLIMBING INTO THE 81 TO 86 DEGREE RANGE, BUT STILL NICE FOR THIS
TIME OF YEAR. EXPECT HIGH CLOUDS TO LINGER MUCH OF THE MORNING
HOURS, BEFORE THINNING OUT SOME IN THE AFTERNOON. A FEW SHOWERS
COULD GRAZE FAR SOUTHWESTERN FRANKLIN COUNTY IN THE AFTERNOON.
SHORT TERM
(WEDNESDAY NIGHT THROUGH FRIDAY)
ISSUED AT 936 PM CDT TUE JUN 23 2026
A GRADUAL WARM UP IS FORECAST THROUGH THE SHORT TERM AS A STRONG
UPPER LEVEL RIDGE BEGINS BUILDING INTO THE AREA FROM THE WEST,
WITH HIGHS RISING INTO THE UPPER 80S TO LOWER 90S BY FRIDAY ALONG
WITH HEAT INDICES IN THE UPPER 90S TO NEAR 100 DEGREES. HOWEVER,
AN UPPER LEVEL SHORTWAVE IS FORECAST TO SNEAK IN THURSDAY MORNING,
CAUSING LOW CHANCES (30% OR LESS) OF THUNDERSTORMS THURSDAY
AFTERNOON INTO THE EVENING HOURS (AIDED BY MOISTURE FROM SOUTHERLY
FLOW). NO STRONG NOR SEVERE STORMS ARE CURRENTLY ANTICIPATED WITH
THIS ACTIVITY AS SHEAR IS VERY LOW WITH MINOR INSTABILITY TO WORK
WITH.
LONG TERM
(FRIDAY NIGHT THROUGH TUESDAY)
ISSUED AT 936 PM CDT TUE JUN 23 2026
A FAIRLY STOUT UPPER-LEVEL RIDGE OF HIGH PRESSURE OVER TEXAS WILL
BUILD INTO THE REGION THIS WEEKEND INTO EARLY NEXT WEEK. A VERY WARM,
HUMID AIR MASS WILL SPREAD EASTWARD OVER THE TENNESSEE VALLEY
UNDERNEATH THIS RIDGE AND THE END RESULT WILL LIKELY BE MAJOR TO
POTENTIALLY EXTREME HEAT IMPACTS DURING THIS TIMEFRAME. AMPLE
SUNSHINE EACH DAY WILL PUSH HIGH TEMPERATURES INTO THE LOW TO MID 90S
SATURDAY AND SUNDAY AND THE MID TO POTENTIALLY UPPER 90S MONDAY AND
TUESDAY. THESE HOT TEMPERATURES, COMBINED WITH DEWPOINTS IN THE LOW
TO MID 70S WILL CREATE HEAT INDEX VALUES OVER 100 DEGREES EACH DAY,
AND POTENTIALLY ABOVE 105 DEGREES SUNDAY, MONDAY, AND TUESDAY. SHOULD
THESE TRENDS CONTINUE, HEAT ADVISORY PRODUCTS MAY BE NEEDED EARLY
NEXT WEEK -- ESPECIALLY FACTORING THE VERY LIMITED RECOVERIES
OVERNIGHT (LOWS IN THE MID 70S). NWS HEAT RISK VALUES HIGHLIGHT A
VAST MAJORITY OF THE REGION IN MAJOR RISK FOR THIS TIMEFRAME,
MEANING THAT THIS HEAT WILL LIKELY AFFECT ANYONE SENSITIVE TO HEAT
(ESPECIALLY THOSE WITHOUT ADEQUATE COOLING/HYDRATION) AS WELL AS SOME
HEALTH SYSTEMS AND INDUSTRIES. IF YOU HAVE OUTDOOR PLANS THIS
WEEKEND INTO EARLY NEXT WEEK, BE SURE TO PRACTICE HEAT SAFETY SUCH AS
STAYING HYDRATED AND SEEKING SHADE WHEN OUTDOORS TO AVOID HEAT
RELATED ILLNESS.
AVIATION
(12Z TAFS)
ISSUED AT 555 AM CDT WED JUN 24 2026
A TEMPO GROUP FOR MVFR VISIBILITIES DUE TO FOG WERE LEFT IN THE
12Z TAF ISSUANCE THROUGH 14Z. THEN EXPECT VFR CONDITIONS TO
RETURN. HIGH CIGS AROUND 25,000 FEET ARE EXPECTED TO CONTINUE THIS
MORNING BEFORE BREAKING UP THIS AFTERNOON. FOG LOOKS VERY POSSIBLE
AGAIN LATER TONIGHT, BUT LEFT OUT FOR NOW SINCE THAT WOULD OCCUR
TOWARDS THE END OF THE TAF PERIOD.
CLIMATE
ISSUED AT 936 PM CDT TUE JUN 23 2026
MODERATE RISK FOR MUCH ABOVE NORMAL TEMPERATURES:
THE CLIMATE PREDICTION CENTER HAS INCLUDED THE TENNESSEE VALLEY
IN A MODERATE RISK FOR MUCH ABOVE NORMAL TEMPERATURES FOR
JULY 1-3. THEREFORE, THERE IS A 40-60% CHANCE FOR TEMPERATURES
ABOVE ABOVE THE MID 90S AND HEAT INDEX VALUES ABOVE 105 DEGREES F
DURING THIS PERIOD.
MORE INFORMATION ON THE CPC U.S. HAZARDS OUTLOOK CAN BE FOUND AT:
HTTPS://WWW.CPC.NCEP.NOAA.GOV/PRODUCTS/PREDICTIONS/THREATS/THREATS.PHP
HUN WATCHES/WARNINGS/ADVISORIES
AL...DENSE FOG ADVISORY UNTIL 9 AM CDT THIS MORNING FOR ALZ008>010.
TN...DENSE FOG ADVISORY UNTIL 9 AM CDT THIS MORNING FOR TNZ097.
NEAR TERM...KTW
SHORT TERM....HC
LONG TERM....AMP
AVIATION...KTW
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