Suppression Forecast
Issued by NWS Grand Rapids, MI

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FNUS73 KGRR 080932
FWSGRR

Spot Forecast for Looney 31...USFS
National Weather Service Grand Rapids MI
532 AM EDT Sat May 8 2021

Forecast is based on ignition time of 1000 EDT on May 08.
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...Light winds from the NW along with sunny skies are
expected today. With dew points in the mid 20s today, this will
allow for RH readings to bottom out near 30% in the area by mid
afternoon. Winds will tend to shift more westerly as we approach
evening.

.REST OF TODAY...

Sky/weather.........Sunny (10-20 percent).
Temperature.........44 at ignition...Max 54.
RH..................60 percent at ignition...Min 32 percent.
Wind (20 ft)........Winds northwest at 9 mph at
                    ignition...otherwise Northwest winds 5 to 10
                    mph.
Mixing height.......3800 ft AGL at ignition...otherwise 6200 ft
                    AGL.
Mixing winds........West 5 to 15 mph.
Smoke dispersal.....500 /good/ at ignition. Max...800 /excellent/.
Haines Index........3 or very low potential for large plume
                    dominated fire growth at ignition...max 5.

TIME (EDT)      10 AM  NOON   2 PM   4 PM   6 PM   8 PM
Sky (%).........10     12     16     14     29     51
Weather cov.....
Weather type....NONE   NONE   NONE   NONE   NONE   NONE
Tstm cov........
Temp............44     50     53     54     54     51
RH..............60     41     33     32     32     42
20 ft wind......NW 9   NW 9   NW 10  NW 9   NW 8   NW 6
20 ft wind gust.10     11     12     11
Mix hgt (ft)....3800   5700   5900   6200   4200   700
Haines index....3      4      5      5      5      4
Smoke Dispersal 500    800    700    800    400    0

.TONIGHT...

Sky/weather.........Partly cloudy (40-50 percent) then becoming
                    mostly cloudy (65-75 percent). Areas of frost
                    overnight. Widespread frost overnight.
Temperature.........Min 32.
RH..................Max 85 percent.
Wind (20 ft)........West winds 5 to 10 mph in the evening becoming
                    light, then becoming east up to 5 mph overnight
                    increasing to 5 to 6 mph.
Mixing height.......3700 ft AGL.
Mixing winds........Southwest 1 to 9 mph shifting to the east 2 to
                    3 mph overnight.
Smoke dispersal.....0-400 (poor to good).
Haines Index........3 to 5 or very low to moderate potential for
                    large plume dominated fire growth.

.SUNDAY...

Sky/weather.........Partly sunny (65-75 percent). Widespread frost
                    early in the morning.
Temperature.........Max 54.
RH..................Min 41 percent.
Wind (20 ft)........Northeast winds 5 to 8 mph.
Mixing height.......8600 ft AGL.
Mixing winds........Northeast 0 to 11 mph increasing to north.
Smoke dispersal.....0-1300 (poor to excellent).
Haines Index........3 to 4 or very low to low potential for large
                    plume dominated fire growth.

$$
Forecaster...Hoving
Requested by...Joe Raspotnik
Type of request...PRESCRIBED
.TAG 2111926.0/GRR
.DELDT 05/08/21
.FormatterVersion 1.0.26
.EMAIL joseph.raspotnik@usda.gov


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