567
FXUS63 KGRR 070518
AFDGRR
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
118 AM EDT SAT JUN 7 2025
KEY MESSAGES
- NEAR NORMAL TEMPERATURES WITH SOME SHOWER/STORM CHANCES
- WARMING UP LATER NEXT WEEK
DISCUSSION
ISSUED AT 245 PM EDT FRI JUN 6 2025
- NEAR NORMAL TEMPERATURES WITH SOME SHOWER/STORM CHANCES
EXPECTING TEMPERATURES TO BE AROUND NORMAL FOR THE TIME OF YEAR
(HIGHS IN THE MID-UPPER 70S, LOWS IN THE MID 60S)... SLIGHTLY WARMER
ON SATURDAY BUT WITH DRY/COMFORTABLE DEW POINT AND HUMIDITY, AND A
SLIGHT COOL DOWN FOR MON-TUE.
THERE IS ABOUT A 30 PCT CHANCE OF LIGHT RAIN IN SOUTHERN PORTIONS OF
LOWER MICHIGAN SATURDAY NIGHT TO SUNDAY MORNING AS A WEAK UPPER-
LEVEL SHORTWAVE AND OHIO VALLEY LOW PASS BY. QUICKLY FOLLOWING WILL
BE A LARGER UPPER-LEVEL LOW LUMBERING IN FROM SOUTH-CENTRAL CANADA.
A LEADING COLD FRONT IS MORE LIKELY TO TOUCH OFF SCATTERED SHOWERS
OR STORMS SUNDAY EVENING INTO THE NIGHT. MODELS SUGGEST MODEST
INSTABILITY WITH CAPE FOCUSED MAINLY IN THE LOWER MID-LEVELS BUT
JUST ENOUGH FOR LIGHTNING POTENTIAL. A FEW SHOWERS MAY DEVELOP WITH
DAYTIME HEATING UNDERNEATH THE LOW MON-TUE.
- WARMING UP LATER NEXT WEEK
THE PATTERN SHIFTS TOWARD GENERALLY WEAK SOUTHWESTERLY FLOW FROM THE
CENTRAL CONUS TO GREAT LAKES MID-LATE WEEK. GOOD CONFIDENCE IN
TEMPERATURES CLIMBING INTO THE 80S THU-FRI WITH DEW POINTS /
HUMIDITY ALSO STARTING TO CREEP UP. ENSEMBLE CLUSTERS SHOW ONLY
SUBTLE DIFFERENCES IN THE OVERALL SYNOPTIC PATTERN AT THIS TIME.
CAPE AND QPF AMONG MODEL ENSEMBLE MEMBERS ALSO BECOME MORE COMMON
STARTING MAINLY FRIDAY INTO THE WEEKEND, THE UPSHOT BEING CHANCES
FOR THUNDERSTORMS. MINOR UPPER-LEVEL DISTURBANCES IN THIS WEAK FLOW
REGIME AND RELATIVELY WEAK SHEAR SHOULD KEEP THE SEVERE WEATHER
THREAT SUBDUED WITH HIT-OR-MISS DOWNPOURS BEING MORE OF THE
CONVECTIVE MODE.
AVIATION /06Z TAFS THROUGH 06Z SUNDAY/
ISSUED AT 114 AM EDT SAT JUN 7 2025
VFR CONDITIONS EXPECTED TO CONTINUE THROUGH SUNDAY. WINDS WILL BE
LIGHT AND VARIABLE OVERNIGHT AND EAST TO NORTHEAST BLO 10 KNOTS
TODAY.
MARINE
ISSUED AT 114 AM EDT SAT JUN 7 2025
WINDS AND WAVES ARE EXPECTED TO BE RELATIVELY CALM THROUGH THE
MIDDLE OF NEXT WEEK WITH WINDS LESS THAN 20 KNOTS AND WAVES 3 FEET
OR LESS.
GRR WATCHES/WARNINGS/ADVISORIES
MI...NONE.
MARINE...NONE.
DISCUSSION...CAS
AVIATION...OSTUNO
MARINE...OSTUNO
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page