268
FXUS64 KMRX 222318 AAA
AFDMRX
AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE MORRISTOWN TN
718 PM EDT SUN MAR 22 2026
..NEW AVIATION
KEY MESSAGES
UPDATED AT 717 PM EDT SUN MAR 22 2026
- A CHANCE OF SHOWERS LATE TONIGHT AND EARLY MONDAY MORNING, MAINLY
NORTH OF INTERSTATE 40.
- LOW AFTERNOON RELATIVE HUMIDITY EXPECTED FOR MONDAY, TUESDAY,
AND WEDNESDAY.
- MOSTLY DRY AND NEAR SEASONAL TO ABOVE NORMAL TEMPERATURES
THROUGHOUT MUCH OF THE WEEK. DROUGHT CONDITIONS LIKELY WORSENS
ACROSS SOUTHEAST TENNESSEE.
DISCUSSION
ISSUED AT 225 PM EDT SUN MAR 22 2026
CURRENTLY, SUBSIDENCE FROM RIDGING OVER THE REGION IS SUPPRESSING
CONVECTIVE DEVELOPMENT OVER THE TENNESSEE VALLEY AND SOUTHERN
APPALACHIANS. STRONG UPPER JET/SHORT-WAVE OVER THE OHIO VALLEY
INTO THE MID-ATLANTIC STATES WILL PRODUCE A LINE OF STORMS THAT
WILL MOVE SOUTHEAST TOWARD SOUTHWEST VIRGINIA BY 06-09Z MONDAY.
DUE TO LOSS OF UPPER DYNAMICS AND LIMITED INSTABILITY THIS LINE
WILL WEAKEN CONSIDERABLY WITH ONLY SCATTERED SHOWERS ANTICIPATED.
SCATTERED SHOWERS WITH LIMITED QPF IS EXPECTED EARLY MONDAY
MORNING MAINLY NORTH OF INTERSTATE 40. ENSEMBLE MEANS ARE LESS
THAN ONE-TENTH INCH.
FOR THE LATTER HALF OF MONDAY THROUGH THURSDAY, SURFACE RIDGING
AND DRY NORTHWEST FLOW ALOFT WILL BE THE MAIN WEATHER STORY. MAIN
CONCERN WILL BE THE LOW AFTERNOON RELATIVE HUMIDITY IN THE
20S/30S. BESIDES SOME LIGHT SHOWERS ACROSS SOUTHEAST TENNESSEE
WEDNESDAY, MOSTLY DRY CONDITIONS WITH NEAR SEASONAL TO ABOVE
NORMAL TEMPERATURES ANTICIPATED. AGAIN, ENSEMBLE QPF MEANS ARE
LESS THAN ONE-TENTH INCH.
FOR FRIDAY, ENSEMBLE CLUSTER SHOW A STRONG JET MOVING INTO THE
OHIO AND NORTHERN TENNESSEE VALLEY. THE UPPER LEVEL DYNAMICS
WEAKEN AS THE SYSTEM MOVES INTO THE REGION. ALSO, RETURN MOISTURE
FROM THE GULF IS LIMITED DUE TO PERSISTENT SURFACE RIDGING INTO
THE GULF COAST STATES. SCATTERED SHOWERS ARE EXPECTED BUT MAINLY
NORTH OF INTERSTATE 40.
SURFACE RIDGING AND DRY NORTHWEST FLOW ALOFT RETURNS FOR NEXT
WEEKEND.
AVIATION
(00Z TAFS)
ISSUED AT 717 PM EDT SUN MAR 22 2026
A COLD FRONT WILL PASS THROUGH THE AREA MONDAY MORNING, AROUND
10-12Z. THIS WILL MOSTLY BE A DRY FRONT AT THE TERMINALS, BUT TRI
COULD SEE A BRIEF SHOWER. WINDS THROUGH THE NIGHT WILL BE SW AT
10-15 KT, BUT THEN SHIFT TO N-NW BEHIND THE FRONT TOMORROW WITH
GUSTS OF 20-25 KT AT TIMES.
PRELIMINARY POINT TEMPS/POPS
CHATTANOOGA AIRPORT, TN 61 72 45 68 / 10 0 0 10
KNOXVILLE MCGHEE TYSON AIRPORT, TN 57 66 41 66 / 20 10 0 0
OAK RIDGE, TN 56 65 41 66 / 30 10 0 0
TRI CITIES AIRPORT, TN 53 62 35 64 / 60 20 0 0
MRX WATCHES/WARNINGS/ADVISORIES
NC...NONE.
TN...WIND ADVISORY UNTIL 9 AM EDT MONDAY FOR BLOUNT SMOKY MOUNTAINS-
COCKE SMOKY MOUNTAINS-SEVIER SMOKY MOUNTAINS.
VA...NONE.
DISCUSSION...DH
AVIATION...DGS
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