556
FXUS63 KGRR 201724
AFDGRR
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
1224 PM EST SAT DEC 20 2025
KEY MESSAGES
- WINTRY MIX WITH SNOW IN THE NORTH TODAY
- COLD WEATHER RETURNS TO BEGIN THE WEEK
- WARM UP THROUGH CHRISTMAS
DISCUSSION
ISSUED AT 356 AM EST SAT DEC 20 2025
- WINTRY MIX WITH SNOW IN THE NORTH TODAY
WARM AIR ADVECTION THIS MORNING AND INTO EARLY AFTERNOON WILL BE
FOLLOWED BY A COLD FRONT SWINGING THROUGH THE REGION THIS
AFTERNOON AND EVENING. BANDS OF RAIN/SNOW MIX WITH SLEET THROUGH
THE NORTHWEST WILL TRAVERSE THE REGION EARLY TO MID AFTERNOON.
THIS FRONTAL SYSTEM HAS MUCH LESS MOISTURE THAN YESTERDAY'S AND
THE MID LEVEL AIR IS MUCH WARMER. SO ANY SIGNIFICANT SNOWFALL WILL
BE ALONG THE US 10 CORRIDOR WITH UP TO AN INCH POSSIBLE.
- COLD WEATHER RETURNS TO BEGIN THE WEEK
COLD AIR RETURNS AGAIN WITH A STRONG TEMPERATURES GRADIENT DROPS
OVER THE REGION SATURDAY NIGHT INTO SUNDAY. ANY SNOWFALL WILL BE
THROUGH NORTHERN LOWER MICHIGAN SO SOUTHERN MICHIGAN SHOULD REMAIN
DRY. LOWS SUNDAY AND MONDAY MORNINGS WILL BE IN THE TEENS WITH
HIGHS ON SUNDAY IN THE MID 20S.
A WARM FRONTAL SYSTEM WILL LIFT INTO THE REGION MONDAY. WHILE
SNOW IS STILL EXPECTED BUT IT WILL MAINLY BE ALONG AND NORTHWARD
OF THE I 96 CORRIDOR WITH AROUND A HALF AN INCH OF ACCUMULATIONS.
- WARM UP THROUGH CHRISTMAS
THE PREVIOUSLY MENTIONED WARM FRONTAL SYSTEM WILL BEGIN THE WARM
UP TREND THAT WILL CONTINUE THROUGH CHRISTMAS AND INTO NEXT
WEEKEND. THE MAX TEMPS ON MONDAY WILL BEGIN THE WEEK AROUND 3
DEGREES ABOVE NORMAL AND BY CHRISTMAS HIGH TEMPS WILL BE AROUND
20 DEGREES ABOVE NORMAL. THE FORECASTED HIGH FOR GRAND RAPIDS AREA
FOR CHRISTMAS CURRENTLY IS 53F. THAT WOULD PLACE IT IN THE TOP 5
WARMEST CHRISTMAS'S ON RECORD. THE WARMEST CHRISTMAS ON RECORD
FOR GRAND RAPIDS IS 65 IN 1982. THERE REMAINS SOME QUESTION ON
TIMING BUT THE ZONAL FLOW THIS WEEK SHOULD BRING SOME RAIN SHOWERS
MIDWEEK WITH SLIGHTLY COOLER TEMPS INTO NEXT WEEKEND. HOWEVER
THOSE MAX TEMPS WILL REMAIN ABOVE FREEZING.
AVIATION /18Z TAFS THROUGH 18Z SUNDAY/
ISSUED AT 1224 PM EST SAT DEC 20 2025
VFR CONDITIONS EXPECTED THROUGH LATE TONIGHT, WITH A PERIOD OF
CIGS LOWERING TO AROUND 4KFT LIKELY AS A COLD FRONT CROSSES THE
TERMINALS. LOW CHANCE OF RAIN/SNOW SHOWERS AT MKG AND GRR OVER
THE NEXT FEW HOURS AND HAVE PROB30S AT THESE TERMINALS
ACCORDINGLY. MVFR CIGS SLIDE IN FROM THE NORTH AFTER 06Z
CONTINUING THROUGH THE END OF THE TAF PERIOD. SOUTHWEST WINDS
GUSTING TO 30 KNOTS SHIFT TO WESTERLY BEHIND THE FRONT WITH GUSTS
CONTINUING UNTIL DIMINISHING LATE SUNDAY MORNING.
MARINE
ISSUED AT 356 AM EST SAT DEC 20 2025
WINDS CONTINUE TO RAMP UP AS THE GALE GOES INTO EFFECT. BASED ON
LATEST GUIDANCE HAVE EXTENDED THE GALE INTO SATURDAY NIGHT. WHILE
THERE WILL BE A LULL, WINDS WILL REMAIN TRANSITORY WITH GALES
POSSIBLE. WAVES WILL REMAIN AROUND 10 FEET THROUGH THIS TIMEFRAME.
NORTHWEST FLOW THIS EVENING WILL ONCE AGAIN INCREASE WINDS AND
WAVES INTO SATURDAY NIGHT.
GRR WATCHES/WARNINGS/ADVISORIES
MI...NONE.
MARINE...GALE WARNING UNTIL 1 AM EST SUNDAY FOR LMZ844>849.
DISCUSSION...CERU
AVIATION...THOMAS
MARINE...CERU
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