428
FXUS64 KMEG 071752
AFDMEG
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MEMPHIS TN
1152 AM CST SAT MAR 7 2026
..NEW MESOSCALE UPDATE
KEY MESSAGES
ISSUED AT 1150 AM CST SAT MAR 7 2026
- WIDESPREAD SHOWERS AND THUNDERSTORMS WILL CONTINUE THIS
AFTERNOON, FOCUSED AHEAD OF A SLOW-MOVING COLD FRONT. A
MARGINAL TO SLIGHT RISK FOR SEVERE STORMS IS IN PLACE WITH
DAMAGING WINDS AND HEAVY RAINFALL THE PRIMARY CONCERNS.
- DAILY SHOWER AND THUNDERSTORM CHANCES ARE EXPECTED INTO NEXT
WEEK. RAINFALL TOTALS WILL RANGE FROM 3 TO 5 INCHES.
MESOSCALE UPDATE FOR CURRENT SEVERE THUNDERSTORM WATCH
ISSUED
AT 1150 AM CST SAT MAR 7 2026
THE CURRENT LINE OF BROKEN STORMS IS ORIENTED ALONG A LARGE
OUTFLOW BOUNDARY AND SITUATED ALONG A NE TO SW LINE FROM CAMDEN,
TN BACK INTO BOLIVAR, TN AND BACK INTO HOLLY SPRINGS, MS. THE
LINE CONTINUES TO SLOW DOWN AND MOVE IN A GENERALLY EASTWARD
DIRECTION AROUND 15 TO 20 MPH. THE MAIN IMPACTS AT THIS TIME ARE
HEAVY RAINFALL AND LIGHTNING. AS STORMS CONTINUE TO PROGRESS
ACROSS NORTH MISSISSIPPI AND PORTIONS OF WEST TENNESSEE ALONG
TN/MS BORDER, THE ENVIRONMENT REMAINS MODERATELY UNSTABLE (UP TO
1500 J/KG OF MLCAPE) AND MODERATELY SHEARED (30 KNOTS OF DEEP
LAYER SHEAR).
LOW LEVEL SPIN OR HELICITY REMAINS IN THE MODERATE RANGE AS WELL
WITH VALUES ALONG AND JUST AHEAD OF THE BOUNDARY PINGING AROUND
150 M2/S2. ALTHOUGH CONVECTION IS RATHER UNORGANIZED AT THE
MOMENT, THERE IS A MEDIUM CHANCE (40-60%) CHANCE OF
REORGANIZATION AND UPSCALE GROWTH AS THE LINE MOVES INTO NORTH
CENTRAL AND NORTHEAST MISSISSIPPI OVER THE NEXT COUPLE OF HOURS.
DAMAGING WINDS AND HEAVY RAINFALL WILL CONTINUE TO BE THE MAIN
THREATS, WITH A SECONDARY THREAT OF A BRIEF TORNADO OR TWO.
STORMS WILL CLEAR THE TENNESSEE RIVER BY LATE AFTERNOON.
AC3
DISCUSSION
(TONIGHT THROUGH NEXT FRIDAY)
ISSUED AT 1041 PM CST FRI MAR 6 2026
THE LATEST NQA RADAR SWEEP INDICATES AN UPTICK IN THUNDERSTORMS
MOVING NORTHWEST MISSISSIPPI FROM THE ARKLATEX REGION WITH LIFT
FROM WARM AIR ADVECTION, A WEAK SHORTWAVE, AND A LOW-LEVEL JET.
AS WE MOVE INTO THE OVERNIGHT HOURS, MID-LEVEL AND LOW-LEVEL
CLOUDS WILL BEGIN TO INCREASE, PRECEDING A SLOW-MOVING COLD
FRONT.
WIDESPREAD SHOWERS AND THUNDERSTORMS, CURRENTLY ORIENTED JUST
WEST OF ARKANSAS, WILL BEGIN PUSHING INTO THE MID-SOUTH AROUND
SUNRISE, AIDED BY THIS COLD FRONT. LOOKING AT SEVERE PARAMETERS
AHEAD OF THIS LINE OF STORMS, FORECAST SBCAPE VALUES WILL BE ON
THE ORDER OF 700-1200 J/KG, EFFECTIVE BULK WIND SHEAR VALUES OF
AROUND 30 KTS, AND MID-LEVEL LAPSE RATES AROUND 6-6.5 C/KM.
THOUGH THE PARAMETER SPACE IS NOT OPTIMAL FOR A SLAM DUNK SEVERE
WEATHER DAY, INSTABILITY WILL BE EFFICIENT ENOUGH FOR ISOLATED TO
SCATTERED SEVERE THUNDERSTORMS WITH A PRIMARY THREAT OF DAMAGING
WINDS. BRIEF SPIN-UP TORNADOES ALONG THE MAIN LINE OF STORMS
WILL BE A SECONDARY THREAT TOMORROW AS 0-1KM SRH VALUES ARE
FORECAST TO BE UPWARDS OF 200 M2/S2 AND MLCAPE VALUES >500 J/KG.
CAMS OVER THE LAST 18 HOURS OR SO HAVE TRENDED SLOWER THAN
INITIALLY ANTICIPATED, THEREFORE, THE ENVIRONMENT WILL LIKELY
HAVE MORE TIME TO DESTABILIZE AS WE MOVE INTO MID-MORNING/EARLY
AFTERNOON. SEVERE WEATHER WILL BE A THREAT ALL DAY AS THE SEVERE
PARAMETER SPACE INCREASES WITH DAYTIME HEATING AS THIS LINE OF
STORMS MOVES SOUTHWEST.
FLOODING WILL ALSO BE A CONCERN AS PWATS SURGE TO AROUND 1.7",
NEARING THE CLIMATOLOGICAL MAXIMUM FOR THIS TIME OF THE YEAR.
LATEST CAMS ARE IN GOOD AGREEMENT THAT TRAINING STORMS WILL MOVE
MAINLY OVER THE MISSISSIPPI DELTA REGION AND EXTEND INTO
NORTHWEST MISSISSIPPI. FORECAST QPF AMOUNTS IN THE AFOREMENTIONED
AREA ARE UPWARD OF 3". NUISANCE FLOODING AND URBAN AND SMALL
STREAMS WILL LIKELY BE THE BIGGEST CONCERN, WARRANTING POTENTIAL
FLOOD ADVISORIES, ESPECIALLY IN THE AFTERNOON INTO EARLY EVENING
HOURS. THE COLD FRONT WILL PUSH PAST OUR AREA BY EARLY SUNDAY
DRYING US OUT AND LEAVING TEMPERATURES IN THE MID 60S TO LOWER
70S. A BIT OF RELIEF AFTER THE PAST SEVERAL RECORD BREAKING
TEMPERATURE DAYS.
DRY CONDITIONS WILL NOT LAST LONG, HOWEVER, AS THE AFOREMENTIONED
FRONT LIFTS BACK NORTH AND A FEW SHORTWAVES INCREASE OUR SHOWER
AND THUNDERSTORM CHANCES ONCE AGAIN MONDAY MORNING. BY TUESDAY,
OUR WEATHER PATTERN WILL BEGIN TO BE GREATLY INFLUENCED BY A
CLOSED UPPER-LEVEL LOW OVER BAJA CALIFORNIA. SEVERAL SHORTWAVES
WILL EJECT FROM THIS REGION BRINGING DAILY RAIN CHANCES THROUGH
MID-WEEK. AS FAR AS SEVERE WEATHER GOES TUESDAY AND WEDNESDAY,
DETERMINISTIC MODEL GUIDANCE SUGGESTS A MORE SOUTHERN TRACK OF
THIS UPPER-LOW LEADING TO SEVERE WEATHER STAYING JUST SOUTH OF
OUR AREA. HOWEVER, ENSEMBLE SOLUTIONS AND CLUSTER ANALYSIS
SUGGEST A MORE NORTHERN ORIENTATION RESULTING IN SEVERE WEATHER
CREEPING INTO SOUTHERN PORTIONS OF THE MID-SOUTH. SOMETHING TO
KEEP AN EYE ON. THE LATTER PART OF THE WEEK LOOKS DRY AND COOLER
AS A COLD FRONT PUSHES THROUGH THURSDAY.
AEH
AVIATION
(12Z TAFS)
ISSUED AT 551 AM CST SAT MAR 7 2026
AN APPROACHING COLD FRONT WILL BRING AN ARRAY OF AVIATION IMPACTS
OVER THE NEXT 24-30 HOURS. KNQA IS STARTING TO PICK UP SOME
STORMS THAT ARE BECOMING LINEARLY ORGANIZED AND WILL PROPAGATE
SOUTHEASTWARD WITH THE PROGRESS OF THE COLD FRONT THIS AFTERNOON.
DURING THE FROPA, INTERMITTENT REDUCTIONS IN CIG/VSBY AND STRONG
GUSTY WINDS ARE ALL ON THE TABLE. EXPECT TSRA IMPACTS TO LAST FOR
A COUPLE HOURS WITH THE LEADING EDGE OF THE CONVECTION UPON ITS
ARRIVAL AT EACH TERMINAL. BEHIND THE MAIN LINE, CAMS ARE IN GOOD
AGREEMENT ON A BROAD RAIN SHIELD LASTING THROUGH AT LEAST LATE
EVENING, TAPERING OFF TO LIGHT DRIZZLE UNTIL AROUND MIDNIGHT.
WINDS WILL GRADUALLY SHIFT AROUND THE HORN FROM SOUTHWEST TO
NORTH BY TOMORROW MORNING AFTER THE FRONT PASSES. THOUGH PRECIP
WILL CLEAR OUT OVERNIGHT, POST-FRONTAL LOW STRATUS (MOST LIKELY
IFR) IS EXPECTED TO LINGER WELL INTO THE AFTERNOON TOMORROW WITH
VERY SLOW IMPROVEMENTS BACK TO VFR.
FIRE WEATHER
ISSUED AT 1041 PM CST FRI MAR 6 2026
FIRE WEATHER CONCERNS WILL BE LIMITED OVER THE NEXT SEVERAL DAYS
AS WETTING RAIN CHANCES INCREASE, AIDED BY A COLD FRONT. MINIMUM
RELATIVE HUMIDITY VALUES WILL REMAIN ABOVE 50% THROUGH AT LEAST
EARLY WEEK. WARM TEMPERATURES WILL CONTINUE INTO NEXT WEEK.
MEG WATCHES/WARNINGS/ADVISORIES
AR...NONE.
MO...NONE.
MS...NONE.
TN...NONE.
PUBLIC FORECAST...SJM
AVIATION...CAD
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