604
FXUS64 KMEG 202003
AFDMEG
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MEMPHIS TN
203 PM CST FRI DEC 20 2024
..NEW SYNOPSIS, DISCUSSION
SYNOPSIS
ISSUED AT 202 PM CST FRI DEC 20 2024
CHILLY CONDITIONS WILL CONTINUE THROUGH SUNDAY BEFORE A WARMING
TREND BEGINS MONDAY. THE CHRISTMAS HOLIDAY WILL BE WARM AND WET AS
SHOWERS IMPACT THE REGION. BEYOND MIDWEEK, THE FORECAST BECOMES
MURKY BUT RAIN CHANCES REMAIN.
DISCUSSION
(THIS EVENING THROUGH NEXT THURSDAY)
ISSUED AT 202 PM CST FRI DEC 20 2024
COLD AND DRY AIR CONTINUES TO FILTER INTO THE MID-SOUTH AT THIS
HOUR WITH DEWPOINTS IN THE MID 20S AREAWIDE. EXPECT EFFICIENT RADIATIONAL
COOLING TONIGHT AS LOWS DIP INTO THE MID AND UPPER 20S AREAWIDE.
COLD AIR WILL ONCE AGAIN BE REINFORCED ON SATURDAY AS A WEAK
SHORTWAVE, EMBEDDED ON THE BACKSIDE OF A LARGER TROUGH, MOVES OVER
THE MID-SOUTH. AS A RESULT, HIGH TEMPERATURES THROUGH SUNDAY WILL
BE IN THE 40S.
UNFORTUNATELY, COOL AND DRY CONDITIONS WILL NOT LAST THROUGH THE
CHRISTMAS HOLIDAY AS SOUTHERLY WINDS RETURN ON MONDAY. RAIN
CHANCES BEGIN TO INCREASE ON TUESDAY, BUT EXACT TIMING OF ONSET IS
DIFFICULT TO PINPOINT DUE TO DISAGREEMENT IN HOW QUICKLY MOISTURE
RETURNS. FOR EXAMPLE, THE GFS REMAINS BULLISH AND FAVORS ISOLATED
SHOWER DEVELOPMENT TUESDAY EVENING. HOWEVER, THE ECMWF KEEPS
MOISTURE AT BAY UNTIL LATE TUESDAY, RESULTING IN SHOWER FORMATION
LATER INTO CHRISTMAS DAY. REGARDLESS, BOTH MODELS FAVOR
PRECIPITABLE WATER VALUES AT OR EXCEEDING THE 99TH PERCENTILE ON
CHRISTMAS. IT IS SAFE TO SAY THAT THE HOLIDAY WILL BE WET AND
DREARY.
A TRICKY FORECAST MATERIALIZES BY THURSDAY AS GUIDANCE DEPICTS A
SERIES OF SHORTWAVE TROUGHS DEVELOPING ON THE LEEWARD SIDE OF THE
ROCKIES THROUGH SATURDAY. ONE THING THE GFS AND ECMWF DO AGREE ON:
FRIDAY'S TROUGH TAKING ON A NEGATIVE TILT AS IT MOVES EAST. THE
EXACT LOCATION OF THIS FEATURE IS UP FOR DEBATE, BUT GIVEN ABOVE
AVERAGE TEMPERATURES AND PLENTIFUL MOISTURE IT IS SAFE TO SAY THAT
SEVERE WEATHER MAY MATERIALIZE AT SOME POINT NEXT WEEK. WHETHER
THAT WILL OCCUR HERE IS TOO EARLY TO TELL, BUT WE WILL CONTINUE TO
MONITOR TRENDS.
ANS
AVIATION
(18Z TAFS)
ISSUED AT 1101 AM CST FRI DEC 20 2024
A COLD FRONT HAS PUSHED THROUGH THE MIDSOUTH AND STRONG GUSTY
WINDS ARE USHERING A COLDER AND DRY AIRMASS. A FEW MID-LEVEL
CLOUDS ARE NOTED ON SATELLITE ACROSS WEST TENNESSEE AND NORTH
MISSISSIPPI. THESE ARE THE RESULT OF A WEAK DISTURBANCE MOVING
INTO MIDDLE TENNESSEE AND KENTUCKY AND SHOULD DIMINISH IN
COVERAGE THIS EVENING. OTHERWISE, VFR CONDITIONS ARE EXPECTED
THROUGH THE TAF CYCLE. WINDS WILL TREND WEAKER THROUGH THE PERIOD.
MEG WATCHES/WARNINGS/ADVISORIES
AR...NONE.
MO...NONE.
MS...NONE.
TN...NONE.
PUBLIC FORECAST...ANS
AVIATION...JDS
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