090
FXUS64 KJAN 281126 AAA
AFDJAN
AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE JACKSON MS
626 AM CDT SUN JUN 28 2026
..NEW AVIATION
KEY MESSAGES
- DANGEROUS HEAT STRESS INTENSIFIES AREAWIDE TODAY, & CONTINUES
THROUGH THE WEEK.
DISCUSSION
ISSUED AT 301 AM CDT SUN JUN 28 2026
TODAY THROUGH SATURDAY...AS THEY GRADUALLY SLIDE NORTHEAST AND EAST
OF THE LOWER MISSISSIPPI RIVER VALLEY, HIGH PRESSURE AT BOTH THE
SURFACE AND ALOFT WILL MAINTAIN A PRESENCE ACROSS THE FORECAST AREA
THIS WEEK. THIS WILL PROVIDE SOME OPPORTUNITY FOR THE CWA TO DRY OUT
OVER AT LEAST THE NEXT COUPLE DAYS. HOWEVER THE TRADE-OFF OF HAVING
THESE DRY DAYS, WILL BE THAT OF A RATHER HOT AND HUMID STRETCH OF
WEATHER EXISTING ACROSS THE REGION THROUGHOUT THIS FORECAST PERIOD.
CURRENTLY, THE NEXT BEST CHANCE FOR RAIN WILL COME TUESDAY, WITH
CHANCES REMAINING IN THE FORECAST THROUGH WEEK'S END, AS DISTURBANCES
CAUGHT UP IN EASTERLY FLOW ALOFT ON THE SOUTHERN PERIPHERY OF
THE AFOREMENTIONED HIGH ALOFT, AFFECT THE FORECAST AREA.
IN THE MEANTIME, INCREASING HEAT STRESS WILL BE THE PRIMARY STORY
DURING THIS FORECAST STRETCH. THIS AFTERNOON, HIGHS WILL WARM INTO
THE LOW AND MIDDLE 90S, BUT WILL INCREASE TO THE MID AND UPPER 90S
MONDAY THROUGH THE REMAINDER OF THE PERIOD. THIS, COUPLED WITH DEW
POINTS IN THE 70S, WILL YIELD AFTERNOON HEAT INDEX VALUES ABOVE THE
CENTURY MARK THROUGHOUT THE FORECAST PERIOD. AT THE MOMENT, HEAT
INDICES LOOK THEIR HIGHEST MONDAY AND ONWARD AS VALUES COULD REACH
UP TO AROUND 110F. HOWEVER COME TUESDAY, AND AGAIN CONTINUING
THROUGH SATURDAY, INCREASED RAIN CHANCES EACH AFTERNOON COULD HAVE
AN AFFECT ON JUST HOW HIGH HEAT INDEX READINGS GET. I'LL CONTINUE
TO ADVERTISE THESE DANGEROUS HEAT STRESS CONDITIONS IN THE HWO THIS
WEEK. WE WILL ALSO EVALUATE ON A DAILY BASIS WHETHER OR NOT, AT A
MINIMUM, A "HEAT ADVISORY" IS NEEDED FOR PORTIONS OF THE FORECAST
AREA. CURRENTLY, A "HEAT ADVISORY" IN EFFECT FOR MAINLY WESTERN AND
SOUTHERN PORTIONS OF THE AREA FROM NOON TODAY THROUGH 9 PM MONDAY.
THIS ADVISORY WILL LIKELY NEED TO BE EXPANDED EASTWARD IN THE COMING
DAYS. /19/
AVIATION
(12Z TAFS)
ISSUED AT 626 AM CDT SUN JUN 28 2026
VFR FLIGHT CATEGORIES WILL PREVAIL AT AREA TAF SITES THROUGH THIS
12Z FORECAST PERIOD. WINDS WILL INCREASE FROM THE SOUTHWEST
BETWEEN 8-13 KNOTS THROUGH THE MORNING, WITH A FEW HIGHER GUSTS
POSSIBLE. /19/
PRELIMINARY POINT TEMPS/POPS
JACKSON 93 75 95 76 / 0 0 0 0
MERIDIAN 94 75 97 75 / 0 0 0 0
VICKSBURG 93 76 94 76 / 0 0 0 0
HATTIESBURG 97 75 98 76 / 0 0 0 0
NATCHEZ 94 75 96 75 / 0 0 0 0
GREENVILLE 93 76 94 76 / 0 0 0 0
GREENWOOD 94 75 96 75 / 0 0 0 0
JAN WATCHES/WARNINGS/ADVISORIES
MS...HEAT ADVISORY FROM NOON TODAY TO 9 PM CDT MONDAY FOR MSZ018-019-
025-034-035-040>042-047-048-053>055-059>066-072>074.
LA...HEAT ADVISORY FROM NOON TODAY TO 9 PM CDT MONDAY FOR LAZ007>009-
015-016-023>026.
AR...HEAT ADVISORY FROM NOON TODAY TO 9 PM CDT MONDAY FOR ARZ074-075.
19
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