501
FXUS63 KGRR 100621
AFDGRR
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
221 AM EDT SUN MAY 10 2026
KEY MESSAGES
- FROST/FREEZE NEXT COUPLE NIGHTS
- RAIN CHANCES TUESDAY AND LATE WEEK
DISCUSSION
ISSUED AT 221 AM EDT SUN MAY 10 2026
- FROST/FREEZE NEXT COUPLE NIGHTS
CANADIAN SURFACE HIGH BUILDS IN TONIGHT WITH CLEAR SKIES AND LIGHT
WINDS LEADING TO FROST/FREEZE CONDITIONS FOR ALL OF THE FORECAST
AREA. THIS SHOULD BE THE COLDEST NIGHT OF THE WEEK SINCE THE SFC
HIGH IS MOVING EAST MONDAY NIGHT AND CLOUDS MAY BE MOVING IN LATE
IN THE NIGHT BUT TEMPERATURES COULD STILL FALL BELOW FREEZING IN
THE COLD SPOTS WHERE WINDS STAY DECOUPLED.
- RAIN CHANCES TUESDAY AND LATE WEEK
A CLIPPER LOW MOVING IN THE FAST NORTHWEST FLOW ARRIVES ON TUESDAY
WITH THE FIRST WIDESPREAD RAIN THIS MONTH. QPF EXPECTED TO BE
AROUND A QUARTER INCH WITH SOME ISOLATED HALF INCH AMOUNTS
POSSIBLE WITH SCATTERED CONVECTION TUESDAY EVENING.
FLOW GOES MORE ZONAL LATE WEEK AND DEEPER MOISTURE STREAMS UP FROM
THE GULF AHEAD OF A SHORTWAVE TROUGH THAT ARRIVES FRIDAY OR
SATURDAY WITH SHOWERS AND SCATTERED CONVECTION.
AVIATION /06Z TAFS THROUGH 06Z MONDAY/
ISSUED AT 221 AM EDT SUN MAY 10 2026
VFR CONDITIONS WILL CONTINUE THROUGH SUNDAY EVENING. NORTH WINDS
WILL GUST OVER 20 KNOTS AT TIMES THIS AFTERNOON.
MARINE
ISSUED AT 221 AM EDT SUN MAY 10 2026
LIGHT WINDS AND WAVES WILL CONTINUE INTO TUESDAY THEN A SMALL
CRAFT ADVISORY WILL BE NEEDED FOR LATE TUESDAY INTO WEDNESDAY AS
HIGH PRESSURE MOVES EAST AND SOUTH WINDS INCREASE TO 30 KNOTS.
GRR WATCHES/WARNINGS/ADVISORIES
MI...FROST ADVISORY UNTIL 8 AM EDT THIS MORNING FOR MIZ037-043>046.
FREEZE WARNING UNTIL 8 AM EDT THIS MORNING FOR MIZ038>040.
MARINE...NONE.
DISCUSSION...OSTUNO
AVIATION...OSTUNO
MARINE...OSTUNO
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