FNUS75 KTFX 171609
FWSTFX

SPOT FORECAST FOR PIPELINE PROGRAMATIC PILE BURNING...BLACKFEET
NATIONAL WEATHER SERVICE GREAT FALLS MT
1009 AM MDT FRI APR 17 2009

FORECAST IS BASED ON IGNITION TIME OF 1015 MDT ON APRIL 17.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...DRY HIGH PRESSURE WILL BE OVER THE BURN AREA TODAY.
HOWEVER...A WEATHER DISTURBANCE APPROACHING THE AREA WILL CAUSE
SURFACE PRESSURE FALLS IN CANADA WITH SOUTHERLY WINDS INCREASING
DURING THE AFTERNOON. THE DISTURBANCE WILL PASS THROUGH THE BURN
AREA OVERNIGHT WITH WINDS CONTINUING TO INCREASE DURING THE
EVENING BEFORE SWITCHING TO THE WEST WITH PASSAGE OF A SURFACE
FRONT. BREEZY WESTERLY WINDS WILL CONTINUE THROUGH THE DAY ON
SATURDAY. MPJ

.REST OF TODAY...

SKY/WEATHER.........MOSTLY SUNNY...WITH SOME THIN HIGH CLOUDS.
CWR.................0 PERCENT.
MAX TEMPERATURE.....53-58.
MIN HUMIDITY........29-34 PERCENT.
WIND (20 FT)........SOUTH WINDS 4 TO 8 MPH...BECOMING 7 TO 14 MPH
                    IN THE AFTERNOON.
RIDGE TOP WIND......SOUTHWEST WINDS 10 TO 15 MPH.
MIXING HEIGHT.......4500 FT AGL.
MIXING WINDS........SOUTHWEST AROUND 15 MPH.

.TONIGHT...

SKY/WEATHER.........MOSTLY CLOUDY. SLIGHT CHANCE OF SNOW SHOWERS.
CWR.................5 PERCENT.
MIN TEMPERATURE.....32-37.
MAX HUMIDITY........77-82 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 10 TO 15 MPH.
RIDGE TOP WIND......SOUTHWEST TO WEST WINDS 15 TO 20 MPH.
MIXING HEIGHT.......500 FT AGL.
MIXING WINDS........WEST 15 TO 20 MPH.

.SATURDAY...

SKY/WEATHER.........MOSTLY SUNNY.
CWR.................0 PERCENT.
MAX TEMPERATURE.....48-53.
MIN HUMIDITY........28-33 PERCENT.
WIND (20 FT)........WEST TO NORTHWEST WINDS 10 TO 15 MPH.
RIDGE TOP WIND......WEST WINDS 15 TO 20 MPH.
MIXING HEIGHT.......6500 FT AGL.
MIXING WINDS........WEST AROUND 25 MPH.

$$
FORECASTER...MPJ
REQUESTED BY...TYSON RUNNINGWOLF
TYPE OF REQUEST...PRESCRIBED
.TAG 20090417.PIPEL.01/TFX