FNUS73 KGRR 291252
FWSGRR

FIRE WEATHER PLANNING FORECAST FOR POWERLINE UNIT 1...USFS
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
852 AM EDT WED APR 29 2009

FORECAST IS BASED ON IGNITION TIME OF 1400 EDT ON APRIL 29.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
SOME SHOWERS SOUTH OF GRAND RAPIDS ARE NOT EXPECTED TO REACH THIS
LOCATION.  WINDS WILL BECOME GUSTY THROUGH THE DAY FROM THE
SOUTHEAST. HUMIDITY LEVELS WILL FALL INTO THE 30 PERCENT RANGE
DURING THE AFTERNOON.  SHOWERS AND SOME THUNDERSTORMS ARE POSSIBLE
FOR THURSDAY.

.TODAY...

SKY/WEATHER.........PARTLY SUNNY (55-65 PERCENT).
TEMPERATURE.........61 AT IGNITION...MAX 64.
RH..................36 PERCENT AT IGNITION...MIN 31 PERCENT.
WIND (20 FT)........WINDS SOUTHEAST AT 24 MPH AT
                    IGNITION...OTHERWISE SOUTHEAST WINDS 14 TO 19
                    MPH.
MIXING WINDS........SOUTHEAST 16 TO 25 MPH INCREASING TO 20 TO 28
                    MPH IN THE AFTERNOON.
MIXING HEIGHT.......4200 FT AGL AT IGNITION...OTHERWISE 4500-5000
                    FT AGL.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH AT IGNITION...MAX 5.
SMOKE DISPERSAL.....FAIR TO GOOD (200-500 KNOT-FT) INCREASING TO
                    EXCELLENT /1200 KNOT-FT/ AT IGNITION.
                    MAX...EXCELLENT /1200 KNOT-FT/.

.TONIGHT...

SKY/WEATHER.........MOSTLY CLOUDY (80-90 PERCENT).
TEMPERATURE.........MIN 45.
RH..................MAX 93 PERCENT.
WIND (20 FT)........SOUTHEAST WINDS 7 TO 12 MPH.
MIXING WINDS........SOUTHEAST 14 TO 18 MPH.
MIXING HEIGHT.......3400-3900 FT AGL DECREASING TO 1100-1600 FT
                    AGL.
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.
SMOKE DISPERSAL.....GOOD TO EXCELLENT (500-700 KNOT-FT) DECREASING
                    TO POOR TO FAIR (100-200 KNOT-FT).

.THURSDAY...

SKY/WEATHER.........CLOUDY (90-100 PERCENT). RAIN SHOWERS LIKELY
                    AND A CHANCE OF THUNDERSTORMS.
TEMPERATURE.........MAX 68.
RH..................MIN 63 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 13 TO 18 MPH. GUSTY AND ERRATIC
                    WINDS EXPECTED NEAR THUNDERSTORMS.
MIXING WINDS........SOUTH 13 TO 14 MPH SHIFTING TO THE SOUTHWEST
                    AROUND 13 MPH IN THE EVENING.
MIXING HEIGHT.......600-1100 FT AGL.
HAINES INDEX........2 TO 3 OR OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
SMOKE DISPERSAL.....POOR TO FAIR (100-200 KNOT-FT).

$$
FORECASTER...MJS
REQUESTED BY...JOHN HUSCHKE
TYPE OF REQUEST...PRESCRIBED
.TAG 20090429.POWER.01/GRR