FNUS73 KGRR 080951
FWSGRR

Spot Forecast for Gourdneck Snake Island...MI DNR
National Weather Service Grand Rapids MI
551 AM EDT Wed Apr 8 2026

Forecast is based on ignition time of 1100 EDT on April 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...
A weak band of sprinkles or light showers will move through this
morning. This could bring a couple hundredths of an inch or rain
through the planned ignition time. Conditions will dry out this
afternoon with more sunshine breaking out. Winds will become gusty
from the south around the ignition time, and increase a bit through
the afternoon.

.REST OF TODAY...

Sky/weather.........Mostly cloudy (65-75 percent) then becoming
                    mostly sunny (30-40 percent). Slight chance of
                    rain late in the morning.
Temperature.........41 at ignition...Max 60.
RH..................48 percent at ignition...Min 34 percent.
Wind (20 ft)........Winds south at 12 mph at ignition...otherwise
                    South winds 13 to 18 mph with gusts 25 to 30 mph.
Mixing height.......2500 ft AGL at ignition...otherwise 3500 ft
                    AGL.
Mixing winds........South 25 to 30 mph.
Smoke dispersal.....500 /good/ at ignition. Max...650 /excellent/.

TIME (EDT)      11A 12P 1PM 2PM 3PM 4PM 5PM 6PM 7PM 8PM 9PM 10P
Sky (%).........80  67  63  45  44  35  29  29  32  24  21  37
Weather cov.....SCH
Weather type....RN
Tstm cov........
Temp............41  44  48  51  54  58  58  60  58  57  54  53
RH..............48  46  44  44  41  34  34  34  45  49  52  57
20 FT wind dir..S   S   S   S   S   S   S   S   S   S   S   S
20 FT wind spd..12  13  14  14  15  15  15  15  14  14  14  14
20 FT wind gust.25  25  26  26  28  29  29  29  29  28  29  30
Mix hgt (kft)...2.5 2.5 2.5 2.5 2.7 3.0 3.5 3.5 0.9 0.9 0.8 0.8
Mixing wind dir.S   S   S   S   S   S   S   S   S   S   S   S
Mixing wind spd.21  21  21  23  24  24  26  25  21  22  21  23
Smoke disprsl...500 500 550 575 600 610 650 650 190 200 170 170

.TONIGHT...

Sky/weather.........Partly cloudy (25-35 percent) then becoming
                    mostly cloudy (50-60 percent). Slight chance of
                    rain showers after 3 am. Chance of rain showers
                    early in the morning.
Temperature.........Min 51.
RH..................Max 77 percent.
Wind (20 ft)........South winds 14 to 15 mph with gusts to around
                    31 mph.
Mixing height.......600 ft AGL.
Mixing winds........South 21 to 25 mph.
Smoke dispersal.....420 (good) early in the evening decreasing to
                    150 (fair) late in the night.

.THURSDAY...

Sky/weather.........Mostly cloudy (65-75 percent) then becoming
                    mostly sunny (35-45 percent). Chance of rain
                    showers in the morning and early afternoon.
Temperature.........Max 64.
RH..................Min 46 percent.
Wind (20 ft)........Southwest winds 12 to 14 mph shifting to the
                    west 10 to 12 mph late in the afternoon. Gusts
                    up to 28 mph.
Mixing height.......4000 ft AGL.
Mixing winds........West 25 to 30 mph.
Smoke dispersal.....230 (fair) early in the morning increasing to
                    950 (excellent) in the afternoon.

$$
Forecaster...Jeruzal
Requested by...650
Type of request...PRESCRIBED
.TAG 2609403.0/GRR
.DELDT 04/08/26
.FormatterVersion 2.0.0
.EMAIL stearnsn@michigan.gov