Suppression Forecast
Issued by NWS Grand Rapids, MI

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FNUS73 KGRR 201405
FWSGRR

FIRE WEATHER PLANNING FORECAST FOR MAST LAKE 3 AMENDED...US FOREST SERVICE
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
1005 AM EDT TUE SEP 20 2016

FORECAST IS BASED ON IGNITION TIME OF 0900 EDT ON SEPTEMBER 20.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
RELATIVE HUMIDITY WILL DROP INTO THE MID 30S THIS AFTERNOON. WINDS
WILL BE RELATIVELY LIGHT FROM THE NORTHWEST. CLOUDS WILL BE ON THE
INCREASE TONIGHT WITH A CHANCE OF SHOWERS OR THUNDERSTORMS ON
WEDNESDAY.

.TODAY...

TEMPERATURE.........60 AT IGNITION...MAX 79.
MIXING HEIGHT.......100 FT AGL AT IGNITION...OTHERWISE 300-800 FT
                    AGL INCREASING TO 5300-5800 FT AGL...THEN
                    DECREASING TO 3100-3600 FT AGL LATE IN THE DAY.
MIXING WINDS........NORTHWEST 2 TO 10 MPH SHIFTING TO THE SOUTHWEST
                    AROUND 2 MPH IN THE EVENING.
RH..................93 PERCENT AT IGNITION...MIN 36 PERCENT.
SKY/WEATHER.........SUNNY (15-25 PERCENT).
WIND (20 FT)........WINDS NORTH AT 5 MPH AT IGNITION...OTHERWISE
                    LIGHT WINDS BECOMING WEST 5 TO 10 MPH.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH AT IGNITION...MAX 6.
SMOKE DISPERSAL.....700 (EXCELLENT) INCREASING TO 1200 (EXCELLENT)
                    IN THE AFTERNOON.

TIME (EDT)      9 AM   11 AM  1 PM   3 PM   5 PM   7 PM
SKY (%).........26     17     9      8      11     15
WEATHER COV.....
WEATHER TYPE....NONE   NONE   NONE   NONE   NONE   NONE
TEMP............60     67     74     78     79     73
RH..............93     73     50     37     36     49
20 FT WIND......N 4    N 5    NW 5   W 6    W 6    W 5
20 FT GUST......5                    10     10
HAINES INDEX....5      5      6      6      5      5

.TONIGHT...

TEMPERATURE.........MIN 57.
MIXING HEIGHT.......0-400 FT AGL.
MIXING WINDS........SOUTHEAST 1 TO 5 MPH.
RH..................MAX 83 PERCENT.
SKY/WEATHER.........PARTLY CLOUDY (30-40 PERCENT). SLIGHT CHANCE OF
                    SHOWERS AND THUNDERSTORMS TOWARD DAYBREAK.
WIND (20 FT)........SOUTHEAST WINDS 5 TO 9 MPH. GUSTY AND ERRATIC
                    WINDS EXPECTED NEAR THUNDERSTORMS TOWARD
                    DAYBREAK.
HAINES INDEX........3 TO 5 OR OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH TO OR MODERATE POTENTIAL
                    FOR LARGE PLUME DOMINATED FIRE GROWTH.
SMOKE DISPERSAL.....700 (EXCELLENT) IN THE EVENING DECREASING TO
                    0 (POOR) BY MIDNIGHT.

.WEDNESDAY...

TEMPERATURE.........MAX 80.
MIXING HEIGHT.......4100-4600 FT AGL.
MIXING WINDS........SOUTHWEST 5 TO 14 MPH SHIFTING TO THE WEST 12
                    TO 17 MPH IN THE AFTERNOON.
MIXING HEIGHT.......4100-4600 FT AGL.
RH..................MIN 62 PERCENT.
SKY/WEATHER.........PARTLY SUNNY (60-70 PERCENT). CHANCE OF SHOWERS
                    AND THUNDERSTORMS.
WIND (20 FT)........SOUTHWEST WINDS 5 TO 10 MPH. GUSTY AND ERRATIC
                    WINDS EXPECTED NEAR THUNDERSTORMS.
HAINES INDEX........2 TO 4 OR OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH TO OR LOW POTENTIAL FOR
                    LARGE PLUME DOMINATED FIRE GROWTH.
SMOKE DISPERSAL.....700-1000 (EXCELLENT).

$$
FORECASTER...OSTUNO
REQUESTED BY...KEVIN SHERRETZ
TYPE OF REQUEST...PRESCRIBED
.TAG 1600888.0/GRR



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