Suppression Forecast
Issued by NWS Grand Rapids, MI

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880
FNUS73 KGRR 211157
FWSGRR

FIRE WEATHER PLANNING FORECAST FOR ALLEGAN...MI DNR
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
757 AM EDT THU MAY 21 2015

FORECAST IS BASED ON IGNITION TIME OF 1200 EDT ON MAY 21.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...WINDS PICK UP TODAY OUT AHEAD OF A COLD FRONT THAT
WILL REACH CENTRAL LOWER MICHIGAN BY THE EVENING HOURS AND REACH
SOUTHERN LOWER MICHIGAN BY LATER TONIGHT. MIN RH VALUES IN THE
30-35% RANGE WILL BE COMMON FOR MANY AREAS. WIND GUSTS IN THE
20-25 MPH RANGE ARE EXPECTED. A FEW SCATTERED SHOWERS ARE POSSIBLE
LATER THIS AFTERNOON AND TONIGHT ALONG THE COLD FRONT.

.TODAY...

SKY/WEATHER.........PARTLY SUNNY (50-60 PERCENT) THEN BECOMING
                    SUNNY (10-20 PERCENT).
TEMPERATURE.........58 AT IGNITION...MAX 63.
RH..................53 PERCENT AT IGNITION...MIN 43 PERCENT.
WIND (20 FT)........WINDS WEST AT 15 MPH AT IGNITION...OTHERWISE
                    WEST WINDS 11 TO 16 MPH.
MIXING WINDS........WEST 13 TO 20 MPH.
MIXING HEIGHT.......4700 FT AGL AT IGNITION...OTHERWISE 4700-5200
                    FT AGL DECREASING TO 2700-3200 FT AGL LATE IN
                    THE DAY.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH AT IGNITION...MAX 5.
SMOKE DISPERSAL.....100-1000 (POOR TO EXCELLENT).

TIME (EDT)      1 PM   3 PM   5 PM   7 PM
SKY (%).........46     24     9      9
WEATHER COV.....
WEATHER TYPE....NONE   NONE   NONE   NONE
TEMP............58     61     63     62
RH..............53     46     43     46
20 FT WIND......W 15   W 17   W 18   W 15
20 FT GUST......20     20     20
HAINES INDEX....4      4      5      5

.TONIGHT...

SKY/WEATHER.........PARTLY CLOUDY (35-45 PERCENT). SCATTERED RAIN
                    SHOWERS.
TEMPERATURE.........MIN 42.
RH..................MAX 86 PERCENT.
WIND (20 FT)........NORTH WINDS 6 TO 11 MPH.
MIXING WINDS........NORTH 7 TO 14 MPH.

$$
FORECASTER...OSTUNO
REQUESTED BY...JIM FISHER
TYPE OF REQUEST...PRESCRIBED
.TAG 20150521.ALLEG.01/GRR



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