FNUS73 KGRR 141758
FWSGRR

FIRE WEATHER PLANNING FORECAST FOR 40TH STREET...USDA FOREST SERVICE
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
158 PM EDT TUE APR 14 2009

FORECAST IS BASED ON IGNITION TIME OF 1300 EDT ON APRIL 15.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
RAIN SHOWERS WILL TAPER OFF ACROSS SOUTHERN LOWER MICHIGAN TONIGHT
AS LOW PRESSURE PULLS AWAY FROM THE GREAT LAKES. HIGH PRESSURE
WILL GRADUALLY BUILD INTO THE REGION OVER THE NEXT COUPLE DAYS
PROVIDING DRY WEATHER. A FAIRLY TIGHT PRESSURE GRADIENT WILL
LINGER HOWEVER INTO WEDNESDAY WITH A GUSTY EAST-NORTHEAST WIND.
WINDS ON THURSDAY AS THE HIGH MOVES OVERHEAD WILL BE RATHER LIGHT.

THE FIRE DANGER REMAINS HIGH PARTICULARLY NORTH OF A LINE
FROM WHITEHALL TO MT. PLEASANT WHERE PREDOMINANTELY DRY WEATHER WILL
CONTINUE AND WHERE MOST LOCATIONS HAVE NOT RECEIVED MEASURABLE
RAINFALL YET FROM THE CURRENT SYSTEM. DRY WEATHER IS ANTICIPATED
FROM WEDNESDAY THROUGH SATURDAY WITH A MODERATING TREND OF
TEMPERATURES.

.WEDNESDAY...

SKY/WEATHER.........SUNNY (20-30 PERCENT).
TEMPERATURE.........52 AT IGNITION...MAX 58.
RH..................43 PERCENT AT IGNITION...MIN 34 PERCENT.
WIND (20 FT)........WINDS EAST-NORTHEAST AT 11 MPH AT IGNITION...OTHERWISE
                    EAST-NORTHEAT WINDS 8 TO 15 MPH.
MIXING WINDS........EAST-NORTHEAST 13 TO 20 MPH.
MIXING HEIGHT.......5300 FT AGL AT IGNITION...OTHERWISE 6000-6500
                    FT AGL.
HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH AT IGNITION...MAX 6.
SMOKE DISPERSAL.....POOR TO GOOD (100-400 KNOT-FT) INCREASING TO
                    EXCELLENT /900 KNOT-FT/ AT IGNITION.
                    MAX...EXCELLENT /1000 KNOT-FT/.

.WEDNESDAY NIGHT...

SKY/WEATHER.........MOSTLY CLEAR (5-15 PERCENT).
TEMPERATURE.........MIN 31.
RH..................MAX 78 PERCENT.
WIND (20 FT)........EAST WINDS 6 TO 11 MPH.
MIXING WINDS........EAST 6 TO 12 MPH.
MIXING HEIGHT.......4400-4900 FT AGL DECREASING TO 1400-1900 FT
                    AGL.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
SMOKE DISPERSAL.....POOR TO GOOD (100-500 KNOT-FT) DECREASING TO
                    POOR (0 KNOT-FT) AFTER MIDNIGHT.

.THURSDAY...

SKY/WEATHER.........SUNNY (5-15 PERCENT).
TEMPERATURE.........MAX 63.
RH..................MIN 29 PERCENT.
WIND (20 FT)........SOUTHEAST WINDS 5 TO 8 MPH BECOMING
                    LIGHT...THEN BECOMING SOUTHWEST UP TO 5 MPH IN
                    THE EVENING.
MIXING WINDS........SOUTH 3 TO 6 MPH SHIFTING TO THE WEST AROUND 5
                    MPH IN THE EVENING.
MIXING HEIGHT.......5000-5500 FT AGL.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
SMOKE DISPERSAL.....POOR TO FAIR (0-200 KNOT-FT).

$$
FORECASTER...DUKE
REQUESTED BY...STEVE HATTING
TYPE OF REQUEST...PRESCRIBED
.TAG 20090415.40THS.01/GRR