111
FNUS73 KGRR 241304
FWSGRR
SPOT FORECAST FOR POWERLINE...USFS
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
904 AM EDT TUE JUL 24 2018
FORECAST IS BASED ON IGNITION TIME OF 1100 EDT ON JULY 24.
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
STUBBORN LOW PRESSURE FINALLY MOVING OUT TODAY, SO EXPECT DECREASING
CLOUDS THIS AFTERNOON WITH WINDS OUT OF THE NORTHWEST UP TO 10 MPH.
A DRY AND WARMER DAY WITH LOWER RELATIVE HUMIDITIES IS IN STORE FOR
WEDNESDAY.
REST OF TODAY
SKY/WEATHER.........MOSTLY CLOUDY (65-75 PERCENT) THEN BECOMING
SUNNY (10-20 PERCENT).
TEMPERATURE.........73 AT IGNITION...MAX 82.
RH..................83 PERCENT AT IGNITION...MIN 56 PERCENT.
WIND (20 FT)........WINDS NORTHWEST AT 8 MPH AT
IGNITION...OTHERWISE NORTHWEST WINDS 5 TO 10
MPH.
MIXING HEIGHT.......1500 FT AGL AT IGNITION...OTHERWISE 4700-5200
FT AGL DECREASING TO 2200 FT AGL IN THE
EVENING.
MIXING WINDS........NORTHWEST 7 TO 14 MPH.
SMOKE DISPERSAL.....100 /POOR/ AT IGNITION. MAX...700 /EXCELLENT/.
HAINES INDEX........3 OR VERY 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 (%).........81 54 34 19 10 6
WEATHER COV.....
WEATHER TYPE....NONE NONE NONE NONE NONE NONE
TSTM COV........
TEMP............73 77 80 80 78 74
RH..............83 71 60 58 61 73
20 FT WIND......NW 8 NW 7 NW 7 NW 9 NW 9 W 9
20 FT WIND GUST. 8 8 11 11
MIX HGT (FT)....1500 4000 5200 4400 2200 600
HAINES INDEX....3 3 4 5 5 4
SMOKE DISPERSAL 100 500 700 600 300 0
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR (15-25 PERCENT). PATCHY FOG
THROUGH ABOUT 2 AM. AREAS OF FOG OVERNIGHT.
TEMPERATURE.........MIN 59.
RH..................MAX 100 PERCENT.
WIND (20 FT)........NORTHWEST WINDS 5 TO 8 MPH UNTIL MIDNIGHT
BECOMING LIGHT, THEN BECOMING NORTHWEST 5 TO 9
MPH OVERNIGHT.
MIXING HEIGHT.......700-1200 FT AGL.
MIXING WINDS........WEST 1 TO 9 MPH SHIFTING TO THE NORTH 1 TO 2
MPH TOWARD DAYBREAK.
SMOKE DISPERSAL.....0-100 (POOR).
HAINES INDEX........3 TO 5 OR OR VERY LOW POTENTIAL FOR LARGE PLUME
DOMINATED FIRE GROWTH TO OR MODERATE POTENTIAL
FOR LARGE PLUME DOMINATED FIRE GROWTH.
WEDNESDAY
SKY/WEATHER.........SUNNY (15-25 PERCENT). AREAS OF FOG EARLY IN
THE MORNING.
TEMPERATURE.........MAX 82.
RH..................MIN 41 PERCENT.
WIND (20 FT)........WEST WINDS 5 TO 10 MPH.
MIXING HEIGHT.......5400-5900 FT AGL DECREASING TO 2800-3300 FT AGL
LATE IN THE DAY.
MIXING WINDS........NORTHWEST 2 TO 10 MPH INCREASING TO 9 TO 14 MPH
IN THE AFTERNOON.
SMOKE DISPERSAL.....0-800 (POOR TO EXCELLENT).
HAINES INDEX........3 TO 5 OR OR VERY LOW POTENTIAL FOR LARGE PLUME
DOMINATED FIRE GROWTH TO OR MODERATE POTENTIAL
FOR LARGE PLUME DOMINATED FIRE GROWTH.
FORECASTER...MEADE
REQUESTED BY...KEVIN SHERRETZ
TYPE OF REQUEST...PRESCRIBED
.TAG 1813328.0/GRR
.DELDT 07/24/18
.EMAIL KSHERRETZ@FS.FED.US
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