342
FXUS64 KOHX 211718
AFDOHX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NASHVILLE TN
1218 PM CDT FRI AUG 21 2026
..NEW AVIATION
KEY MESSAGES
UPDATED AT 1216 PM CDT FRI AUG 21 2026
- LOW RAIN AND STORM CHANCES EAST OF I-65 TODAY AND TOMORROW, BEST
CHANCES ACROSS THE PLATEAU.
- OVERALL DRIER WITH SLIGHTLY BELOW-NORMAL TEMPERATURES THIS
WEEKEND WITH FOG POSSIBLE TOMORROW AND SUNDAY MORNINGS.
- LOW TO MEDIUM RAIN AND STORM CHANCES NEXT WEEK WITH SEASONAL
TEMPERATURES.
SHORT TERM
(REST OF TODAY THROUGH SATURDAY)
ISSUED AT 1150 AM CDT FRI AUG 21 2026
UPPER-LEVEL TROUGHING IS SITUATED ACROSS THE EASTERN CONUS AND AN
EMBEDDED SHORTWAVE DISTURBANCE IS NOW MOVING OFF TO OUR EAST.
DRIER TROPOSPHERIC AIR HAS NOW WORKED INTO THE REGION WITH PWS IN
THE 1.3" RANGE, THOUGH SURFACE DEWPOINTS IN THE LOW 70S ARE
LINGERING MAKING FOR HUMID CONDITIONS TODAY. OVERALL WE EXPECT
LESSER CONVECTIVE COVERAGE TODAY WITH ONLY LOW RAIN/STORM CHANCES
FOCUSED ACROSS THE PLATEAU THIS AFTERNOON AND EVENING. OTHERWISE
WE'LL ENJOY A LIGHT NORTHWESTERLY WIND TODAY WITH SCATTERED
CLOUDS. MOSTLY CLEAR SKIES AND CALM WINDS WILL SUPPORT RADIATIONAL
COOLING TONIGHT, SO FOG DEVELOPMENT IS POSSIBLE, ESPECIALLY
ACROSS THE VALLEYS AND COOLER RURAL AREAS.
ANOTHER WEAK PERTURBATION LOOKS TO ROTATE IN FROM THE NORTHWEST
TOMORROW WHICH HAS RESULTED IN ADDITIONAL RAIN SHOWER/ISOLATED
STORM CHANCES.
LONG TERM
(SATURDAY NIGHT THROUGH NEXT FRIDAY)
ISSUED AT 1150 AM CDT FRI AUG 21 2026
TROUGHING WILL REMAIN IN PLACE THIS WEEKEND WITH NORTHWESTERLY
FLOW PERSISTING ACROSS OUR REGION. THIS WILL FAVOR SLIGHTLY
BELOW-NORMAL TEMPERATURES WITH COOLER OVERNIGHT CONDITIONS INTO
MONDAY. THE TROUGH WILL SLOWLY MIGRATE EAST BY TUESDAY WHICH WILL
HELP BRING TEMPERATURES UP A COUPLE DEGREES. THIS WILL ALSO OPEN
THE DOOR FOR AN AXIS OF HIGHER PWS/INSTABILITY TO PUSH INTO THE
AREA FROM THE WEST. AT LEAST A COUPLE OF PASSING SHORTWAVE
PERTURBATIONS ARE PROGGED TO MOVE THROUGH THE NORTHWESTERLY FLOW
ALOFT WHICH SHOULD FOSTER ISOLATED TO SCATTERED RAIN/STORMS
TUESDAY THROUGH THURSDAY. FORECAST TEMPERATURES ARE ESSENTIAL
RIGHT AT SEASONAL NORMS MOST DAYS NEXT WEEK.
AVIATION
(18Z TAFS)
ISSUED AT 1216 PM CDT FRI AUG 21 2026
OVERALL WE WILL SEE VFR CONDITIONS THROUGH THE TAF PERIOD. MID-
LEVEL CLOUDS THIS AFTERNOON WILL CLEAR THIS EVENING. PATCHY FOG
WILL BE POSSIBLE AFTER 09Z OVER THE PLATEAU AND WILL BRING PERIODS
OF IFR/LIFR CONDITIONS. LIGHT NORTHERLY WINDS UNDER 5 KNOTS.
PRELIMINARY POINT TEMPS/POPS
NASHVILLE 65 92 64 88 / 0 0 10 0
CLARKSVILLE 65 90 63 87 / 0 0 10 0
CROSSVILLE 63 84 60 81 / 0 20 0 0
COLUMBIA 67 93 66 90 / 0 10 10 0
COOKEVILLE 66 87 62 83 / 0 20 10 0
JAMESTOWN 65 85 62 82 / 0 20 10 0
LAWRENCEBURG 66 91 64 88 / 0 0 20 0
MURFREESBORO 68 93 65 89 / 0 0 10 0
WAVERLY 67 91 65 88 / 0 10 10 0
OHX WATCHES/WARNINGS/ADVISORIES
NONE.
SHORT TERM...SIZEMORE
LONG TERM....SIZEMORE
AVIATION.....MUELLER
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