464
FXUS64 KJAN 052318 AAA
AFDJAN
AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE JACKSON MS
618 PM CDT SUN APR 5 2026
..NEW MESOSCALE UPDATE, AVIATION
KEY MESSAGES
- COOLER, DRIER WEATHER EARLY THIS WEEK WILL TRANSITION TO
WARMER AND MORE HUMID BY MID TO LATE WEEK.
- CHANCES FOR SHOWERS AND THUNDERSTORMS WILL RETURN TO PORTIONS
OF THE FORECAST AREA BY MID WEEK.
MESOSCALE UPDATE
ISSUED AT 618 PM CDT SUN APR 5 2026
REST OF THIS EVENING THROUGH TONIGHT...
QUIET AND DRY EVENING IS ON TAP ACROSS THE REGION. SYNOPTIC/WATER
VAPOR ANALYSIS INDICATE DEEP TROUGHING OVER THE EASTERN HALF OF
THE NATION WHILE MEAN RIDGING IS PARKED OVER THE FOUR CORNERS TO
INTERMOUNTAIN WEST. THIS LONGWAVE PATTERN REINFORCES THE COLD
FRONT PASSAGE YESTERDAY EVENING AND DRY SURFACE HIGH BUILDING
SOUTH TONIGHT. NORTHERLY COLD ADVECTION WILL BE THE NORM, WITH
MUCH DRIER AIRMASS BUILDING IN (PWS AROUND 0.2 TO 0.4 INCHES
AREAWIDE). THIS ENVIRONMENT SUPPORTS SEASONABLE LOWS OR SLIGHTLY
COOLER, SOME 2F TO 5F BELOW IN DELTA (48F TO 53F ALONG AND SOUTH
OF INTERSTATE 20 WHILE 44F TO 48F DEGREES NORTH OF INTERSTATE 20).
UPDATES ARE OUT. /DC/
DISCUSSION
ISSUED AT 128 PM CDT SUN APR 5 2026
IN THE WAKE OF LAST NIGHT'S COLD FRONT PASSAGE, COLD AND DRY
ADVECTION IS KEEPING TEMPERATURES MOSTLY BELOW 70 DEGREES ACROSS THE
FORECAST AREA TODAY. EARLIER SHOWERS HAVE ENDED, BUT THE LAST LOW-
LEVEL MOISTURE IS HANGING ON IN THE FORM OF AN AREA OF LOW STRATUS
IN SOUTHEAST MISSISSIPPI AT THE MOMENT. LOW CLOUDS AND MOISTURE WILL
CONTINUE TO DECREASE, WITH RH AROUND 30-35 PERCENT TOMORROW
AFTERNOON AND PWAT VALUES DOWN TO LESS THAN 1/4 INCH. MID-LEVEL
RIDGE AND SURFACE HIGH OVER THE EASTERN CONUS WILL REINFORCE THE DRY
AIR IN THE BROADER REGION WITH TRAJECTORIES OUT OF THE EAST, BUT
MOISTURE WILL WRAP AROUND THE HIGH PRESSURE BY MID TO LATE WEEK.
INCREASING PWATS ALONG THE GULF COAST AND INTO THE HIGH PLAINS WILL
SET UP THE ATMOSPHERE FOR "AIR MASS" STYLE AFTERNOON SHOWER AND
THUNDERSTORM DEVELOPMENT. BY LATE THIS WEEK, THE PLUME OF DEEPER
MOISTURE WILL ARC MORE ACROSS THE MISSISSIPPI RIVER VALLEY AND
SUPPORT AT LEAST SLIGHT CHANCE POPS MAINLY WEST OF INTERSTATE 55.
TEMPERATURES WILL REBOUND SLIGHTLY ABOVE NORMAL BY MID TO LATE WEEK
AS WELL. /NF/
AVIATION
(00Z TAFS)
ISSUED AT 618 PM CDT SUN APR 5 2026
OTHER THAN SOME PASSING HIGH CIRRUS CLOUDS AROUND 20-25KFT, GUSTY
NORTHERLY GRADIENT WINDS WILL WIND DOWN THE NEXT FEW HOURS, LIGHT
OVERNIGHT AND NORTHEASTERLY WINDS PICKING BACK UP AFTER 06/14-15Z
MONDAY. VFR FLIGHT CATEGORIES WILL PREVAIL THROUGH THE TAF PERIOD
THE NEXT 24 HOURS. /DC/
PRELIMINARY POINT TEMPS/POPS
JACKSON 49 71 46 75 / 0 0 0 0
MERIDIAN 48 70 45 76 / 0 0 0 0
VICKSBURG 49 71 46 75 / 0 0 0 0
HATTIESBURG 51 71 46 78 / 10 0 0 0
NATCHEZ 50 71 45 76 / 0 0 0 0
GREENVILLE 46 70 47 74 / 0 0 0 0
GREENWOOD 47 72 47 76 / 0 0 0 0
JAN WATCHES/WARNINGS/ADVISORIES
MS...NONE.
LA...NONE.
AR...NONE.
DC/NF
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