069
FXUS64 KJAN 202057
AFDJAN
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE JACKSON MS
257 PM CST MON JAN 20 2025
..NEW DISCUSSION
DISCUSSION
ISSUED AT 251 PM CST MON JAN 20 2025
TONIGHT THROUGH TUESDAY NIGHT: SNOW IS STILL EXPECTED ACROSS THE
SOUTHERN HALF OF THE AREA TUESDAY FOLLOWED BY BITTER COLD
TEMPERATURES TUESDAY NIGHT. MID AFTERNOON SURFACE ANALYSIS HAD A
>10136MB HIGH CENTERED OVER WESTERN TENNESSEE, A >1042MB HIGH
CENTERED OVER THE CENTRAL PLAINS AND AN INVERTED TROUGH ALONG THE
SOUTHEAST TEXAS COAST. MID AFTERNOON SATELLITE IMAGERY/RAP ANALYSIS
SHOWED A NORTHERN STREAM LARGE AMPLITUDE SHORTWAVE DROPPING OVER THE
CENTRAL CONUS AND A SOUTHERN STREAM DISTURBANCE TRACKING EAST ACROSS
OLD MEXICO. THE NORTHERN STREAM TROUGH WILL SWING ACROSS OUR REGION
TUESDAY AND TUESDAY NIGHT HELPING THE >1042MB HIGH SPREAD SOUTHEAST
OVER OUR CWA. THE SOUTHERN STREAM DISTURBANCE WILL HELP DEVELOP A
SURFACE LOW OFF THE SOUTHEAST TEXAS COAST TRACK EAST ACROSS THE
NORTHERN GULF THROUGH TUESDAY NIGHT. TOGETHER THESE FEATURES WILL
RESULT IN CLOUDS INCREASING ACROSS OUR CWA THIS EVENING FROM THE
SOUTHWEST. LIGHT SNOW IS EXPECTED TO DEVELOP AND MOVE INTO THE
SOUTHWEST PORTIONS OF OUR CWA. THIS AREA OF SNOW IS EXPECTED TO
INCREASE IN COVERAGE ACROSS THE SOUTHERN PORTIONS OF OUR CWA. THIS
WILL LEAD TO ACCUMULATIONS FROM A DUSTING ALONG THE INTERSTATE 20
CORRIDOR TO SEVERAL INCHES ALONG AND SOUTH OF HIGHWAY 84. THE AREA
SOUTH OF INTERSTATE 20 HAS BEEN PLACED IN A WINTER WEATHER ADVISORY
AND THE AREA ALONG THE HIGHWAY 84 CORRIDOR HAS BEEN PLACED IN A
WINTER STORM WARNING. THE WINTER STORM WATCH WAS CANCELED FOR THE
ALONG AND NORTH OF INTERSTATE 20 AS FORECAST SNOWFALL AMOUNTS THERE
WILL BE LESS THAN ONE INCH BUT A FEW ROADS MAY BECOME SLICK THERE
TUESDAY MORNING. MODELS HAVE COME IN FASTER IN ENDING THE SNOW BY
EVENING. AS A REIMBURSING SHOT OF ARCTIC AIR IS DRAWN SOUTH ACROSS
OUR CWA TEMPERATURES WILL PLUMMET AND BOTTOM OUT FROM 11F TO 18F.
WIND CHILL TEMPERATURES WILL BE IN THE SINGLE DIGITS. TUESDAY NIGHT
IS EXPECTED TO BE THE COLDEST NIGHT OF THE WEEK AND A COLD WEATHER
ADVISORY REMAINS INN EFFECT FOR THE WHOLE CWA. /22/
WEDNESDAY THROUGH NEXT MONDAY:
WEDNESDAY WILL REMAIN CHILLY AS AFTERNOON TEMPS REACH THE UPPER 30S
TO NEAR 40 DEGREES ACROSS THE AREA ON WEDNESDAY; HOWEVER OVERNIGHT
LOWS WILL REMAIN DANGEROUSLY COLD WITH AS TEMPS DROPS TO THE TEENS
AND LOWER 20. TEMPERATURES AREN'T EXPECTED TO BE AS COLD ON THURSDAY
AS AFTERNOON HIGHS REACH THE MID 40S; OVERNIGHT LOWS WILL CONTINUE
TO BE IN THE MID 20S. SURFACE RIDGING WILL BEGIN TO MOVE TOWARDS THE
AREA THURSDAY AND FRIDAY, RESULTING IN TEMPERATURES GRADUALLY
WARMING AND INCREASING MOISTURE (DUE TO SOUTHERLY/SOUTHEASTERLY
RETURN FLOW) THROUGH THE WEEKEND. RAIN CHANCES RETURN LATE SATURDAY
AFTERNOON AND IS EXPECTED TO LINGER INTO NEXT MONDAY AS A FEW
SHORTWAVE DISTURBANCES TRAVERSE THE AREA. SHOWERS AND AN ISOLATED
THUNDERSTORM CAN'T BE RULED OUT WILL BE POSSIBLE. ALTHOUGH RAIN
CHANCES ARE EXPECTED, AFTERNOON TEMPS ARE EXPECTED TO RANGE FROM THE
UPPER 50 TO INTO THE 60S BY THE END OF THE FORECAST PERIOD. /SW/
AVIATION
(18Z TAFS)
ISSUED AT 1153 AM CST MON JAN 20 2025
VFR FLIGHT CONDITIONS WITH NORTHERLY WINDS NEAR 10 KTS WILL PREVAIL
THROUGH THE TAF PERIOD. INCREASING CLOUD COVER IS EXPECTED DURING
THE EVENING. -SN WILL BE POSSIBLE AT HEZ(AROUND 08Z) AND HBG/PIB
(AROUND 15Z). /SW/
PRELIMINARY POINT TEMPS/POPS
JACKSON 23 32 13 41 / 20 50 0 0
MERIDIAN 21 32 12 41 / 10 50 0 0
VICKSBURG 23 34 13 41 / 20 30 0 0
HATTIESBURG 23 31 13 42 / 20 80 0 0
NATCHEZ 23 33 13 40 / 30 60 0 0
GREENVILLE 22 31 17 37 / 10 0 0 0
GREENWOOD 20 32 14 40 / 10 10 0 0
JAN WATCHES/WARNINGS/ADVISORIES
MS...WINTER WEATHER ADVISORY FROM MIDNIGHT TONIGHT TO MIDNIGHT CST
TUESDAY NIGHT FOR MSZ053>059.
WINTER STORM WARNING FROM MIDNIGHT TONIGHT TO MIDNIGHT CST
TUESDAY NIGHT FOR MSZ060>066-072>074.
LA...WINTER WEATHER ADVISORY FROM MIDNIGHT TONIGHT TO MIDNIGHT CST
TUESDAY NIGHT FOR LAZ023>025.
WINTER STORM WARNING FROM MIDNIGHT TONIGHT TO MIDNIGHT CST
TUESDAY NIGHT FOR LAZ026.
AR...NONE.
22/SW/SW
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