960
FXUS63 KGRR 211951
AFDGRR
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
251 PM EST SUN DEC 21 2025
KEY MESSAGES
- NO MAJOR IMPACTS TO TRAVEL THIS WEEK
DISCUSSION
ISSUED AT 250 PM EST SUN DEC 21 2025
- NO MAJOR IMPACTS TO TRAVEL THIS WEEK
SURFACE HIGH MOVES EAST TONIGHT WITH AN AREA OF WARM ADVECTION
APPROACHING FROM THE WEST. MOISTURE RETURN ON THE BACK SIDE OF THE
HIGH WILL COMBINE WITH THE ISENTROPIC ASCENT TO PRODUCE AN AREA
OF LIGHT SNOW ON MONDAY ACROSS MUCH OF THE FORECAST AREA. EXPECT
AN INCH OR LESS ACROSS ROUGHLY THE NORTHERN HALF OF THE FORECAST
AREA WITH TEMPERATURES CLOSE TO FREEZING. SOME UNTREATED ROADS
COULD BE SLIPPERY, OTHERWISE NO IMPACTS EXPECTED.
A THAW PERIOD WITH TEMPERATURES MOSTLY ABOVE FREEZING CAN BE
EXPECTED FOR MID-WEEK INCLUDING CHRISTMAS DAY. RAIN IS EXPECTED
THURSDAY FOLLOWED BY A RETURN OF COLD AIR NEXT WEEKEND. ENSEMBLE
SPREAD IS LARGE BY THE END OF THE WEEK, SO CONFIDENCE IS LOW IN
THE DETAILS, BUT STRONG HEIGHT FALLS ARE INDICATED WITH THE
POTENTIAL FOR LAKE EFFECT SNOW BY LATE IN THE WEEKEND AND EARLY
NEXT WEEK.
AVIATION /18Z TAFS THROUGH 18Z MONDAY/
ISSUED AT 1155 AM EST SUN DEC 21 2025
LINGERING MVFR CIGS AT GRR AND MKG WILL LIFT TO VFR OVER THE NEXT
FEW HOURS BEFORE SCATTERING OUT TONIGHT. A WARM FRONT CROSSING THE
AREA MONDAY MORNING WILL LEAD TO CEILINGS LOWERING TO 7-10KFT
AREAWIDE. A LOW (30%) CHANCE OF SNOW SHOWERS EXISTS AT
MKG/GRR/LAN MONDAY MORNING, WITH LOW-LEVEL DRY AIR BEING THE MAIN
LIMITING FACTOR. HAVE GONE WITH A PROB30 FOR NOW AS A RESULT.
NORTHWEST WINDS TODAY AROUND 5-10 KNOTS SHIFT TO SOUTHERLY WITH
THE PASSAGE OF THE WARM FRONT.
GRR WATCHES/WARNINGS/ADVISORIES
MI...NONE.
MARINE...NONE.
DISCUSSION...OSTUNO
AVIATION...THOMAS
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