901
FXUS64 KMEG 052313
AFDMEG
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MEMPHIS TN
613 PM CDT SUN OCT 5 2025
..NEW AVIATION
KEY MESSAGES
UPDATED AT 606 PM CDT SUN OCT 5 2025
- DRY CONDITIONS AND HIGHS IN THE UPPER 80S WILL PERSIST TODAY
WITH A COOLING TREND EXPECTED THROUGH THIS WEEK.
- RAIN CHANCES RETURN TO THE FORECAST STARTING TOMORROW AND WILL
LAST INTO WEDNESDAY. LOCALLY HEAVY RAINFALL AND A FEW
THUNDERSTORMS ARE EXPECTED.
- A COLD FRONT WILL PASS WEDNESDAY, BRINGING COOLER TEMPERATURES
INTO NEXT WEEKEND. HIGHS ARE EXPECTED TO BE IN THE UPPER 70S AND
LOW 80S.
DISCUSSION
(THIS AFTERNOON THROUGH NEXT SATURDAY)
ISSUED AT 1249 PM CDT SUN OCT 5 2025
MOSTLY CLEAR WEATHER WILL CONTINUE THIS AFTERNOON AS HIGH
PRESSURE CONTINUES TO REMAIN OVER THE EASTERN CONUS. DEEP
MOISTURE, WHICH HAS BEEN IN SHORT SUPPLY THIS WEEKEND, IS
BEGINNING TO ADVECT NORTHWARD THROUGHOUT THE REGION AHEAD OF THE
ARRIVAL OF A WEAK GULF DISTURBANCE LATER THIS WEEK. HOWEVER,
UPPER-LEVEL RIDGING WILL KEEP PRECIPITATION OUT OF THE AREA UNTIL
TOMORROW. HIGHS WILL BE IN THE UPPER 80S, WITH LOWS IN THE 60S
TONIGHT.
MOIST ADVECTION WILL CONTINUE OVERNIGHT WITH UPPER RIDGING
SLACKENING AS A POSITIVELY TILTED TROUGH SLOWLY MOVES EAST ACROSS
THE NORTHERN PLAINS. BY TOMORROW MORNING, PWATS ARE TO INCREASE
TO AROUND 2", WHICH IS WELL ABOVE THE 90TH PERCENTILE. THEREFORE,
SCATTERED DIURNAL SHOWERS AND STORMS ARE LIKELY TOMORROW
AFTERNOON. EVEN WITH ANOMALOUS PWATS, THE LACK OF ANY DISTINCT
SYNOPTIC FORCING OR BOUNDARIES WILL KEEP THE THREAT OF FLASH
FLOODING LOCALIZED AREAS THAT SEE ANY TRAINING.
THROUGH MONDAY NIGHT AND EARLY TUESDAY MORNING, THE UPPER TROUGH
OVER THE NORTHERN PLAINS WILL HAVE AMPLIFIED AND TRAVELED TO THE
GREAT LAKES. SCATTERED SHOWERS ARE LIKELY TO STILL BE ONGOING AT
THIS TIME AS SOUTHERLY MOIST ADVECTION CONTINUES WITH MARGINAL
(500-1000 J/KG) MUCAPE. BY 12Z, NAM/RAP/HREF GUIDANCE ALL HAVE A
DISTINCT ZONE OF N/S ORIENTED 925-850 MB FRONTOGENESIS OCCURRING
ALONG AND EAST OF THE MISSISSIPPI RIVER, GRADUALLY PROPAGATING
EASTWARD THROUGHOUT WEST TENNESSEE DURING THE DAY. THERE ARE
DISCREPANCIES WITH REGARDS TO THE POSITION AND EVOLUTION OF THIS
BOUNDARY WITHIN THIS SUITE OF MODELS, BUT CONFIDENCE IS GOOD THAT
A ZONE OF INCREASED RAINFALL WILL ACCOMPANY THE BOUNDARY AS IT
MOVES EAST. THIS DISCREPANCY HAS KEPT NBM QPF THROUGH WEDNESDAY
BELOW 1.5", WHICH SHOULD INCREASE AS WE MOVE FURTHER INTO THE CAM
WINDOW. REGARDLESS, THE POTENTIAL FOR A SLOW-MOVING ZONE OF
TRAINING STORMS HAS MARKEDLY INCREASED SINCE YESTERDAY WHERE
ELEVATED FLASH FLOODING CONCERNS ARE POSSIBLE TUESDAY. RAIN WILL
CONTINUE INTO TUESDAY NIGHT AND WEDNESDAY MORNING AS A MORE
CONCERTED FRONTAL PASSAGE OCCURS. RAIN IS EXPECTED TO END BY 00Z
THURSDAY AFTER THE FRONT HAS MADE IT SOUTH OF THE REGION. WHEN ALL
IS SAID AND DONE WEDNESDAY, MOST AREAS WILL RECEIVE AT LEAST 1"
OF RAIN, WITH UPWARDS OF 2"+ POSSIBLE WHERE TRAINING STORMS ARE
ABLE TO PERSIST.
COOLER TEMPERATURES WILL TAKE OVER FOR THE REST OF THE FORECAST
INTO NEXT WEEKEND AS NORTHWEST FLOW AND SURFACE HIGH PRESSURE
LOCKS IN TEMPERATURES BEHIND THE COLD FRONT. HIGHS ARE ANTICIPATED
TO BE IN THE UPPER 70S AND LOW 80S. THE FRONT WILL STALL NEAR THE
GULF COAST, MAKING IT DIFFICULT FOR MOISTURE TO TRAVEL INLAND AND
KEEPING OUR POPS LOW AFTER THURSDAY THROUGH THE END OF THE PERIOD.
AVIATION
(00Z TAFS)
ISSUED AT 606 PM CDT SUN OCT 5 2025
GUIDANCE CONTINUES TO TREND LOWER WITH CIGS TOMORROW. A
DISTURBANCE MOVING NORTH ACROSS THE REGION WILL RESULT IN A
PROLONGED PERIOD OF SHRA BEGINNING LATE TONIGHT AND CONTINUING
THROUGH THE END OF THE 24/30 HOUR TAF CYCLE. ADDED VCTS AT MEM,
MKL AND JBR FOR MUCH OF THE AFTERNOON HOURS. THERE DOES NOT
APPEAR TO BE MUCH OF A SIGNAL TO NARROW DOWN A WINDOW FOR AN
INCREASED CHANCE FOR THUNDERSTORMS TOMORROW, BUT A WEAK SURFACE
LOW MAY INCREASE THAT RISK AFTER 00Z TOMORROW. WINDS WILL REMAIN
SOUTHEASTERLY, GENERALLY 6-12KTS.
FIRE WEATHER
ISSUED AT 1249 PM CDT SUN OCT 5 2025
FIRE WEATHER CONCERNS REMAIN LOW WITH MINIMUM RELATIVE HUMIDITY
VALUES STICKING AROUND 40 TO 50 PERCENT. 20 FT WINDS ARE SLIGHTLY
ELEVATED TODAY WITH GUSTS TO AROUND 20 MPH POSSIBLE. WETTING RAINS
WILL KEEP FIRE CONCERNS LOW THROUGH THE MIDDLE OF THE WEEK WITH
ANYWHERE FROM 1 TO 2 INCHES OF RAINFALL EXPECTED ACROSS MUCH OF
THE REGION WITH THE POTENTIAL FOR LOCALLY HIGHER RAINFALL TOTALS.
MEG WATCHES/WARNINGS/ADVISORIES
AR...NONE.
MO...NONE.
MS...NONE.
TN...NONE.
PUBLIC FORECAST...JAB
AVIATION...JDS
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