215
FNUS73 KGRR 060802
FWSGRR

Spot Forecast for SER 439N...USFS
National Weather Service Grand Rapids MI
402 AM EDT Fri Jun 6 2025

Forecast is based on ignition time of 1000 EDT on June 06.
If conditions become unrepresentative, contact the National Weather
Service.

Please contact our office at (616) 949-5150, if you have questions
or concerns with this forecast.

.DISCUSSION...
Fair and dry weather expected today with low relative humidity in
the afternoon, dropping to 30 to 35 percent.

.REST OF TODAY...

Sky/weather.........Partly sunny (55-65 percent) then becoming
                    sunny (20-30 percent).
Temperature.........67 at ignition...Max 77.
RH..................51 percent at ignition...Min 34 percent.
Wind (20 ft)........Winds east at 2 mph at ignition...otherwise
                    Light winds becoming northeast 5 to 6 mph
                    through mid afternoon, then shifting to the
                    north around 6 mph late in the day.
Mixing height.......1200 ft AGL at ignition...otherwise 5700 ft
                    AGL.
Mixing winds........East 8 to 12 mph shifting to the north around
                    10 mph in the evening.
Smoke dispersal.....100 /poor/ at ignition. Max...550 /good/.

TIME (EDT)      10 AM  NOON   2 PM   4 PM   6 PM   8 PM
Sky (%).........60     46     75     46     25     35
Weather cov.....
Weather type....NONE   NONE   NONE   NONE   NONE   NONE
Tstm cov........
Temp............67     72     76     76     76     73
RH..............51     40     35     35     36     42
20 ft wind......E 2    E 2    NE 5   N 6    N 6    N 5
20 ft wind gust.7      10     13     14     14     13
Mix hgt (ft)....1200   2900   5300   5600   4700   1000
Mixing wind.....E 8    E 10   E 10   E 8    NE 12  N 8
Smoke disprsl...100    300    550    450    540    80

.TONIGHT...

Sky/weather.........Partly cloudy (25-35 percent).
Temperature.........Min 52.
RH..................Max 80 percent.
Wind (20 ft)........North winds around 5 mph in the evening
                    becoming light.
Mixing height.......400 ft AGL.
Mixing winds........Northeast 8 to 9 mph shifting to the east 7 to
                    8 mph overnight.
Smoke dispersal.....30 (poor).

.SATURDAY...

Sky/weather.........Mostly sunny (40-50 percent) then becoming
                    mostly cloudy (75-85 percent).
Temperature.........Max 77.
RH..................Min 39 percent.
Wind (20 ft)........Light winds in the morning becoming southeast
                    around 5 mph, then shifting to the south
                    through mid afternoon shifting to the west
                    shifting to the northwest late in the day
                    becoming light.
Mixing height.......6200 ft AGL.
Mixing winds........East 5 to 8 mph shifting to the southeast
                    around 5 mph in the afternoon, then shifting to
                    the northeast around 6 mph in the evening.
Smoke dispersal.....50 (poor) early in the morning increasing to
                    280 (fair) in the afternoon.

$$
Forecaster...Ostuno
Requested by...Dean Chambers
Type of request...PRESCRIBED
.TAG 2515396.0/GRR
.DELDT 06/06/25
.FormatterVersion 2.0.0
.EMAIL brian.stearns@usda.gov,dean.chambers@usda.gov