Suppression Forecast
Issued by NWS Grand Rapids, MI

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FNUS73 KGRR 211304
FWSGRR

SPOT FORECAST FOR 437 UNIT 1...FOREST SERVICE
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
904 AM EDT Wed Jun 21 2017

FORECAST IS BASED ON IGNITION TIME OF 1100 EDT ON JUNE 21.
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...THE FOG WILL LIFT VERY SOON IF IT HAS NOT ALREADY.
OTHERWISE HIGH PRESSURE WILL BRING A DRY AND SUNNY DAY WITH
RELATIVELY LIGHT WINDS. SHOWERS AND STORMS MOVE IN TONIGHT, WITH
SCATTERED STORMS CONTINUING THURSDAY AND THURSDAY NIGHT.

.TODAY...

SKY/WEATHER.........SUNNY (15-25 PERCENT). AREAS OF FOG EARLY IN
                    THE MORNING.
TEMPERATURE.........69 AT IGNITION...MAX 76.
RH..................57 PERCENT AT IGNITION...MIN 38 PERCENT.
WIND (20 FT)........WINDS WEST AT 6 MPH AT IGNITION...OTHERWISE
                    LIGHT WINDS BECOMING SOUTHWEST 5 TO 10 MPH.
MIXING HEIGHT.......3600 FT AGL AT IGNITION...OTHERWISE 6500-7000
                    FT AGL DECREASING TO 4100-4600 FT AGL LATE IN
                    THE DAY.
MIXING WINDS........SOUTHWEST 1 TO 8 MPH.
SMOKE DISPERSAL.....100 /POOR/ AT IGNITION. MAX...600 /EXCELLENT/.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH AT IGNITION...MAX 5.

TIME (EDT)      11 AM  1 PM   3 PM   5 PM   7 PM   9 PM
SKY (%).........5      23     30     27     31     37
WEATHER COV.....
WEATHER TYPE....NONE   NONE   NONE   NONE   NONE   NONE
TSTM COV........
TEMP............69     74     76     75     73     69
RH..............57     46     42     43     48     55
20 FT WIND......W 5    W 6    W 7    W 7    SW 6   S 5
20 FT WIND GUST.       10     15     15     10
MIX HGT (FT)....3600   6000   7000   5900   3000   800
HAINES INDEX....4      4      4      5      5      5
SMOKE DISPERSAL 100    400    600    500    200    0

.TONIGHT...

SKY/WEATHER.........PARTLY CLOUDY (45-55 PERCENT) THEN BECOMING
                    CLOUDY (85-95 PERCENT). ISOLATED SHOWERS AND
                    THUNDERSTORMS THROUGH ABOUT 2 AM. WIDESPREAD
                    SHOWERS AND THUNDERSTORMS OVERNIGHT, THEN
                    SCATTERED SHOWERS AND THUNDERSTORMS TOWARD
                    DAYBREAK.
TEMPERATURE.........MIN 61.
RH..................MAX 90 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 5 TO 9 MPH SHIFTING TO THE
                    SOUTHEAST 5 TO 10 MPH. GUSTY AND ERRATIC WINDS
                    EXPECTED NEAR THUNDERSTORMS AFTER MIDNIGHT.
MIXING HEIGHT.......1100-1600 FT AGL.
MIXING WINDS........SOUTHEAST 2 TO 9 MPH INCREASING TO 12 TO 13 MPH
                    TOWARD DAYBREAK.
SMOKE DISPERSAL.....0-100 (POOR).
HAINES INDEX........2 TO 5 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH TO OR MODERATE POTENTIAL
                    FOR LARGE PLUME DOMINATED FIRE GROWTH.

.THURSDAY...

SKY/WEATHER.........MOSTLY CLOUDY (75-85 PERCENT). SCATTERED
                    SHOWERS AND THUNDERSTORMS.
TEMPERATURE.........MAX 81.
RH..................MIN 63 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 7 TO 12 MPH. GUSTS UP TO 25 MPH
                    IN THE AFTERNOON. GUSTY AND ERRATIC WINDS
                    EXPECTED NEAR THUNDERSTORMS.
MIXING HEIGHT.......2900-3400 FT AGL.
MIXING WINDS........SOUTHWEST 14 TO 23 MPH INCREASING TO 22 TO 30
                    MPH IN THE AFTERNOON.
SMOKE DISPERSAL.....100-1000 (POOR TO EXCELLENT).
HAINES INDEX........3 TO 4 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH TO OR LOW POTENTIAL FOR
                    LARGE PLUME DOMINATED FIRE GROWTH.

$$
FORECASTER...MEADE
REQUESTED BY...BEN WAGNER
TYPE OF REQUEST...PRESCRIBED
.TAG 1711372.0/GRR
.EMAIL BENWAGNER@FS.FED.US



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