Suppression Forecast
Issued by NWS Grand Rapids, MI

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000
FNUS73 KGRR 230918
FWSGRR

Spot Forecast for 439 North...USFS
National Weather Service Grand Rapids MI
518 AM EDT Wed May 23 2018

Forecast is based on ignition time of 1000 EDT on May 23.
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...
Patchy dense fog this morning will lift by noon. Winds will become west
with Lake Michigan modified air keeping the humidity from dropping too
low this afternoon.

.REST OF TODAY...

Sky/weather.........Sunny (10-20 percent).
Temperature.........62 at ignition...Max 77.
RH..................65 percent at ignition...Min 47 percent.
Wind (20 ft)........Winds south at 4 mph at ignition...otherwise
                    Light winds becoming west 5 to 10 mph.
Mixing height.......1900 ft AGL at ignition...otherwise 3400-3900
                    ft AGL decreasing to 1400 ft AGL in the
                    evening.
Mixing winds........West 3 to 7 mph.
Smoke dispersal.....100 /poor/ at ignition. Max...300 /good/.
Haines Index........2 or very low potential for large plume
                    dominated fire growth at ignition...max 4.

TIME (EDT)      10 AM  NOON   2 PM   4 PM   6 PM   8 PM
Sky (%).........19     12     9      18     18     10
Weather cov.....
Weather type....NONE   NONE   NONE   NONE   NONE   NONE
Tstm cov........
Temp............62     72     76     77     75     71
RH..............65     49     48     47     50     56
20 ft wind......S 4    SW 6   W 9    W 9    W 9    W 7
20 ft wind gust.              10     11     10
Mix hgt (ft)....1900   3200   3900   3600   2300   700
Haines index....2      2      3      4      4      4
Smoke Dispersal 100    200    300    300    200    0

.TONIGHT...

Sky/weather.........Mostly clear (10-20 percent). Patchy fog toward
                    daybreak.
Temperature.........Min 51.
RH..................Max 89 percent.
Wind (20 ft)........Southwest winds 5 to 7 mph until midnight
                    becoming light.
Mixing height.......200-700 ft AGL.
Mixing winds........Southwest 1 to 7 mph shifting to the south 1 to
                    3 mph after midnight.
Smoke dispersal.....0 (poor).
Haines Index........4 to 5 OR or low potential for large plume
                    dominated fire growth to or moderate potential
                    for large plume dominated fire growth.

.THURSDAY...

Sky/weather.........Sunny (10-20 percent).
Temperature.........Max 81.
RH..................Min 38 percent.
Wind (20 ft)........Light winds becoming southwest 6 to 11 mph.
Mixing height.......3300-3800 ft AGL decreasing to 1200 ft AGL in
                    the evening.
Mixing winds........Southwest 5 to 14 mph.
Smoke dispersal.....0-500 (poor to good).
Haines Index........5 or moderate potential for large plume
                    dominated fire growth.

$$
Forecaster...Ostuno
Requested by...Ben Wagner
Type of request...PRESCRIBED
.TAG 1810501.0/GRR
.EMAIL benwagner@fs.fed.us


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