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Spot Forecast
Issued by NWS Grand Rapids, MI

000
FNUS73 KGRR 241323
FWSGRR

Spot Forecast for Billy Goat Rx Burn...MIDNR
National Weather Service Grand Rapids MI
923 AM EDT Wed Apr 24 2024

Forecast is based on ignition time of 1200 EDT on April 25.
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...
Cool and dry conditions Thursday with dew points in the 20s and
air temperatures in the 40s. Dry weather continues into Friday
before moisture returns.

.THURSDAY...

Sky/weather.........Sunny (10-20 percent).
Temperature.........47 at ignition...Max 50.
RH..................45 percent at ignition...Min 43 percent.
Wind (20 ft)........Winds south at 7 mph at ignition...otherwise
                    Southwest winds 7 to 8 mph shifting to the
                    northwest around 5 mph in the evening.
Mixing height.......1900 ft AGL at ignition...otherwise 1900 ft
                    AGL.
Mixing winds........Southwest 7 to 9 mph shifting to the west 6 to
                    9 mph late in the day.
Smoke dispersal.....130 /fair/ at ignition. Max...170 /fair/.
Haines Index........5 or moderate potential for large plume
                    dominated fire growth at ignition...max 5.

TIME (EDT)      NOON   2 PM   4 PM   6 PM   8 PM   10 PM
Sky (%).........22     15     13     12     12     9
Weather cov.....
Weather type....NONE   NONE   NONE   NONE   NONE   NONE
Tstm cov........
Temp............47     49     49     48     45     41
RH..............45     44     47     51     55     65
20 ft wind......S 7    SW 8   W 9    W 6    N 5    NE 5
20 ft wind gust.9      10     13     10     7      8
Mix hgt (ft)....1900   1900   1200   600    300    300
Mixing wind.....S 7    SW 9   W 9    W 7    NW 5   NE 7
Haines index....5      5      5      5      5      5
Smoke disprsl...130    170    110    40     10     20

.THURSDAY NIGHT...

Sky/weather.........Partly cloudy (25-35 percent) then becoming
                    mostly cloudy (50-60 percent).
Temperature.........Min 37.
RH..................Max 67 percent.
Wind (20 ft)........North winds around 5 mph shifting to the
                    southeast 9 to 14 mph after midnight.
Mixing height.......300 ft AGL.
Mixing winds........Northwest 5 to 6 mph shifting to the east 7 to
                    13 mph until midnight, then shifting to the
                    southeast 16 to 18 mph after midnight.
Smoke dispersal.....10 (poor).
Haines Index........5 or moderate potential for large plume
                    dominated fire growth.

.FRIDAY...

Sky/weather.........Partly sunny (60-70 percent) then becoming
                    cloudy (85-95 percent). Chance of rain showers
                    in the afternoon.
Temperature.........Max 62.
RH..................Min 40 percent.
Wind (20 ft)........Southeast winds 14 to 21 mph.
Mixing height.......2000 ft AGL.
Mixing winds........Southeast 20 to 24 mph.
Smoke dispersal.....120 (poor) early in the morning increasing to
                    490 (good) in the afternoon.
Haines Index........5 or moderate potential for large plume
                    dominated fire growth.

$$
Forecaster...Ostuno
Requested by...Jennifer Hansen
Type of request...PRESCRIBED
.TAG 2412245.0/GRR
.DELDT 04/24/24
.FormatterVersion 2.0.0
.EMAIL hansenj4@michigan.gov