Suppression Forecast
Issued by NWS Grand Rapids, MI

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
000
FNUS73 KGRR 261222
FWSGRR

Spot Forecast for Firewheel 18...USFS
National Weather Service Grand Rapids MI
822 AM EDT Thu Apr 26 2018

Forecast is based on ignition time of 0900 EDT on April 26.
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 mostly sunny sky is expected today with temperatures rising into
the 50s to near 60.  A lake breeze will move through the area late
this morning into early this afternoon...increasing winds to around
10 mph from the west and southwest.

.REST OF TODAY...

Sky/weather.........Sunny (20-30 percent).
Temperature.........38 at ignition...Max 64.
RH..................60 percent at ignition...Min 27 percent.
Wind (20 ft)........Winds southwest at 6 mph at
                    ignition...otherwise Southwest winds 6 to 11
                    mph.
Mixing height.......1100 ft AGL at ignition...otherwise 4000-4500
                    ft AGL decreasing to 2000 ft AGL in the
                    evening.
Mixing winds........Southwest 8 to 15 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)      9 AM   11 AM  1 PM   3 PM   5 PM   7 PM
Sky (%).........13     16     18     24     35     37
Weather cov.....
Weather type....NONE   NONE   NONE   NONE   NONE   NONE
Tstm cov........
Temp............38     52     57     60     60     58
RH..............60     39     31     29     27     30
20 ft wind......SW 6   SW 9   SW 9   SW 10  SW 11  SW 9
20 ft wind gust.       10     11     13     14     11
Mix hgt (ft)....1100   2700   4000   4500   4000   2000
Haines index....4      4      5      5      5      4
Smoke Dispersal 100    300    500    600    600    300

.TONIGHT...

Sky/weather.........Partly cloudy (50-60 percent) then becoming
                    mostly cloudy (75-85 percent) then becoming
                    partly cloudy (60-70 percent). Chance of rain
                    showers after midnight. Chance of snow showers
                    toward daybreak.
Temperature.........Min 34.
RH..................Max 96 percent.
Wind (20 ft)........Southwest winds 5 to 10 mph shifting to the
                    north after midnight.
Mixing height.......800-1300 ft AGL.
Mixing winds........North 10 to 18 mph.
Smoke dispersal.....0-200 (poor to fair).
Haines Index........2 to 3 OR or very low potential for large plume
                    dominated fire growth.

.FRIDAY...

Sky/weather.........Partly sunny (60-70 percent). Chance of rain
                    showers in the afternoon.
Temperature.........Max 50.
RH..................Min 46 percent.
Wind (20 ft)........Northwest winds 5 to 10 mph.
Mixing height.......4800-5300 ft AGL.
Mixing winds........North 8 to 13 mph.
Smoke dispersal.....100-600 (poor to excellent).
Haines Index........3 to 4 OR or very low potential for large plume
                    dominated fire growth to or low potential for
                    large plume dominated fire growth.

$$
Forecaster...Sutton
Requested by...Chris Loomis
Type of request...PRESCRIBED
.TAG 1807924.0/GRR
.EMAIL csloomis@fs.fed.us



USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.