669
FXUS63 KGRR 062335
AFDGRR
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
635 PM EST TUE JAN 6 2026
KEY MESSAGES
- FOG THIS EVENING
- RAIN LATE THURSDAY THEN WEEKEND SNOW CHANCES
DISCUSSION
ISSUED AT 250 PM EST TUE JAN 6 2026
- FOG THIS EVENING AND OVERNIGHT
AREAS OF DENSE FOG HAVE FORMED THIS AFTERNOON ACROSS THE SOUTHERN
HALF OF THE FORECAST AREA WHERE DEW POINTS IN THE MID 30S ARE
LOCATED AND PRECIP HAS TAPERED OFF. WE CURRENTLY HAVE AN SPS OUT
FOR THE FOG BUT MAY NEED TO ISSUE AN ADVISORY IF IT PERSISTS INTO
THE EVENING. THE CONTINUED PRECIP FURTHER NORTH SHOULD KEEP
WIDESPREAD DENSE FOG FROM FORMING UNTIL LATER TONIGHT.
- RAIN LATE THURSDAY THEN WEEKEND SNOW CHANCES
A SOUTHERN STREAM SHORTWAVE TROUGH RESULTS IN SOUTHERN PLAINS
CYCLOGENESIS ON WEDNESDAY WITH THE LOW CENTER PROGGED TO TRACK
INTO LOWER MICHIGAN BY LATE THURSDAY. COLD AIR IS LACKING AND
PRECIP TYPE WILL BE RAIN. QPF HAS TRENDED DOWNWARD SINCE YESTERDAY
AS THE LOW IS NOW FORECAST TO TRACK FURTHER WEST AND OUR AREA MAY
BE DRY SLOTTED THURSDAY NIGHT.
THINGS GET INTERESTING ON SATURDAY AS ANOTHER SOUTHERN STREAM
TROUGH EJECTS INTO THE PLAINS THEN PHASES WITH THE NORTHERN STREAM
AND DRAWS IN COLD AIR. RAIN CHANGES TO SNOW BY SATURDAY NIGHT AND
LAKE ENHANCED SNOWS CONTINUE INTO SUNDAY AS THE SHARP UPPER
TROUGH AXIS SWINGS THROUGH.
AVIATION /00Z TAFS THROUGH 00Z THURSDAY/
ISSUED AT 635 PM EST TUE JAN 6 2026
LIFR CONDITIONS ARE EXPECTED TO PREVAIL THROUGH LATE
MORNING/EARLY AFTERNOON WEDNESDAY AS ADVANCING HIGH PRESSURE
TRAPS LOW-LEVEL MOISTURE. WIDESPREAD LIFR CEILINGS ARE ONGOING AND
WILL CONTINUE THROUGH THE NIGHT AND INTO WEDNESDAY. MELTING
SNOWPACK AND STRATUS BUILD DOWN ARE LIKELY TO LEAD TO AREAS OF FOG
OVERNIGHT, POTENTIALLY DENSE AT TIMES. THE BEST POTENTIAL FOR
DENSE FOG IS AT AZO/BTL. CONDITIONS WILL BE SLOW TO IMPROVE WITH
CONDITIONS IMPROVING TO IFR BY LATE MORNING/EARLY AFTERNOON AND
MVFR BY LATE AFTERNOON. NORTHWEST WINDS TONIGHT WILL SHIFT TO
SOUTHWESTERLY BY WEDNESDAY AFTERNOON.
GRR WATCHES/WARNINGS/ADVISORIES
MI...NONE.
MARINE...NONE.
DISCUSSION...OSTUNO
AVIATION...THOMAS
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