847
FXUS64 KMRX 041742
AFDMRX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MORRISTOWN TN
142 PM EDT FRI SEP 4 2026
..NEW DISCUSSION, AVIATION
KEY MESSAGES
UPDATED AT 138 PM EDT FRI SEP 4 2026
- VERY HOT CONDITIONS WILL CONTINUE AGAIN TODAY WITH HIGHS REACHING
WELL INTO THE 90S AND HEAT INDEX VALUES APPROACHING OR EXCEEDING 100
FOR MOST PLACES OUTSIDE THE HIGHER ELEVATIONS. TAKE FREQUENT BREAKS
AND DRINK PLENTY OF WATER WHEN OUTDOORS.
- HEAT ADVISORY EXTENDED THROUGH SATURDAY WITH CONDITIONS SIMILAR TO
TODAY EXPECTED.
- A FEW STORMS THIS AFTERNOON/EVENING MAINLY IN SOUTHWEST VA, AND
AGAIN ON SATURDAY ACROSS THE ENTIRE EASTERN TENNESSEE VALLEY. SOME
STORMS MAY MAY BECOME STRONG TO SEVERE, WITH DAMAGING WIND GUSTS THE
PRIMARY THREAT.
-WITH A HEAT ADVISORY IN EFFECT AND THE CHANCE FOR AFTERNOON
THUNDERSTORMS ANYONE DOING OUTDOOR ACTIVITIES ON SATURDAY SHOULD
PREPARE FOR HEAT AND KEEP AN EYE ON THE RADAR ALL AFTERNOON.
DISCUSSION
ISSUED AT 138 PM EDT FRI SEP 4 2026
DOG DAYS OF SUMMER CONTINUE THROUGH AT LEAST SATURDAY WITH THE STOUT
RIDGE STAYING RELATIVELY LOCKED IN PLACE OVER THE SOUTHERN UNITED
STATES. HEAT ADVISORY THAT WAS IN EFFECT FOR TODAY HAS BEEN EXTENDED
TO NOW INCLUDE SATURDAY. TEMPERATURES AND HEAT INDEX VALUES WILL BE
RELATIVELY SIMILAR BOTH TODAY AND TOMORROW, WITH TRIPLE DIGITS
VALUES EXPECTED FOR MUCH OF THE EASTERN TENNESSEE VALLEY. IF YOU
PLAN ON ATTENDING ANY OUTDOOR ACTIVITIES THIS WEEKEND IT'S EXTREMELY
IMPORTANT TO PLAN FOR THESE HIGH TEMPERATURES. DRINK PLENTY OF WATER
AND STAY IN THE SHADE AS MUCH AS POSSIBLE.
IN ADDITION, THE HOT TEMPERATURES TODAY AND TOMORROW WILL BRING A
COUPLE OF ROUNDS OF AFTERNOON SHOWERS AND THUNDERSTORMS. WITH THE
VERY HIGH TEMPERATURES SOME OF THE STRONGEST STORMS COULD BECOME
SEVERE WITH DAMAGING WINDS AS THE PRIMARY HAZARD. SHOWERS AND
STORMS WILL BE ISOLATED IN THE TENNESSEE VALLEY TODAY AND MORE
SCATTERED IN THE HIGHER ELEVATIONS.
ON SATURDAY, THE TROUGH DIPS INTO THE OHIO VALLEY AS THE RIDGE MOVES
A BIT WEST TO BE MORE OVER THE PLAINS. AT THE SURFACE, A WEAK COLD
FRONT WILL MOVE THROUGH THE REGION, BRINGING BETTER CHANCES FOR
SHOWERS AND STORMS, ESPECIALLY NORTH OF INTERSTATE 40. WITH BETTER
SYNOPTIC LIFT IN PLACE ON SATURDAY, THERE IS ALSO A HIGHER CHANCE
FOR STRONG TO SEVERE STORMS ESPECIALLY IN EXTREME NORTHEAST
TENNESSEE AND SOUTHWEST VIRGINIA, CLOSER TO THE TROUGH. WITH
MODERATE INSTABILITY, WEAK DEEP LAYER SHEAR AND HIGH FREEZING
LEVELS, THE PRIMARY THREAT WILL BE DAMAGING STRAIGHT-LINE WINDS ONCE
AGAIN.
STARTING SUNDAY WE'LL GET A "BREAK" FROM THESE NEAR RECORD
TEMPERATURES, BUT IT'S STILL GOING TO BE ABOVE NORMAL FOR THE
FORESEEABLE FUTURE AS THE STUBBORN RIDGE REMAINS LOCKED IN PLACE
OVER THE UNITED STATES. THERE'S A SLIVER OF HOPE THAT HEADING INTO
NEXT WEEKEND WE GET A BIT COOLER AS A COUPLE OF SYSTEM MOVING ACROSS
CANADA TRY AND BREAK DOWN THE RIDGE.
DAILY RECORD HIGH MAXIMUM TEMPERATURES
DATE CHATTANOOGA KNOXVILLE TRI-CITIES OAK RIDGE
09-04 102(1954) 101(1954) 99(1954) 100(1954)
09-05 104(1925) 103(1954) 99(1954) 102(1954)
AVIATION
(18Z TAFS)
ISSUED AT 138 PM EDT FRI SEP 4 2026
VFR CONDITIONS EXPECTED FOR THE NEXT 24 HOURS. A FEW VERY ISOLATED
STORMS ARE POSSIBLE THIS AFTERNOON, BUT THEY'RE LIKELY TO REMAIN
ISOLATED ENOUGH TO NOT DIRECTLY IMPACT AN AIRPORT.
PRELIMINARY POINT TEMPS/POPS
CHATTANOOGA AIRPORT, TN 76 99 74 97 / 0 30 10 10
KNOXVILLE MCGHEE TYSON AIRPORT, TN 74 95 72 93 / 10 20 20 20
OAK RIDGE, TN 74 96 71 93 / 0 20 20 20
TRI CITIES AIRPORT, TN 70 91 67 88 / 10 40 50 40
MRX WATCHES/WARNINGS/ADVISORIES
NC...NONE.
TN...HEAT ADVISORY UNTIL 8 PM EDT /7 PM CDT/ SATURDAY FOR ANDERSON-
BLEDSOE-BRADLEY-CAMPBELL-CLAIBORNE-GRAINGER-HAMBLEN-
HAMILTON-HANCOCK-HAWKINS-JEFFERSON-KNOX-LOUDON-MARION-
MCMINN-MEIGS-MORGAN-NORTH SEVIER-NORTHWEST BLOUNT-NORTHWEST
COCKE-NORTHWEST GREENE-NORTHWEST MONROE-RHEA-ROANE-SCOTT TN-
SEQUATCHIE-UNION-WEST POLK.
VA...NONE.
DISCUSSION...99
AVIATION...99
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