FNUS75 KMSO 221356
FWSMSO

SPOT FORECAST FOR CHAFFIN  1
NATIONAL WEATHER SERVICE MISSOULA MT
756 AM MDT SUN APR 22 2012

FORECAST IS BASED ON IGNITION TIME OF 1200 MDT ON APRIL 22.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...VALLEY INVERSIONS WILL HOLD UNTIL THIS AFTERNOON
CAUSING PEAK MIXING LATE IN THE AFTERNOON. MINIMUM HUMIDITIES AND
MAXIMUM TEMPERATURES WILL OCCUR AROUND 5 OR 6 PM WITH PEAK WINDS
AROUND 3 OR 4 PM TODAY. A SIGNIFICANT CONCERN FOR WINDS IS SHOWERS
OR THUNDERSTORMS OUT OF SIGHT UP THE WISCONSIN CREEK DRAINAGE
CAUSING GUSTY WINDS TO FLOW DOWN THE DRAINAGE AND IMPACT THE BURN
SITE FROM THE SOUTHWEST THIS AFTERNOON...AND ESPECIALLY MONDAY.
ANY SHOWERS OR STORMS CLOSER TO THE MAY ALSO CAUSE ERRATIC WINDS.

.TODAY...

SKY/WEATHER.........CLEAR BECOMING PARTLY CLOUDY THIS AFTERNOON.
                    SLIGHT CHANCE OF RAIN SHOWERS AND
                    THUNDERSTORMS IN THE AFTERNOON.
CWR.................10 PERCENT.
MAX TEMPERATURE.....75-80.
MIN HUMIDITY........10-15 PERCENT LOWER SLOPES AND 15-20 PERCENT
                    RIDGES.
WIND (20 FT)........DOWNSLOPE 2-4 MPH BECOMING VARIABLE AROUND 11AM.
                    AFTER 11AM UPSLOPE WINDS INCREASING TO 5-7 MPH.
                    MID TO AND LATE AFTERNOON WINDS SOUTHWEST WINDS
                    WILL GUST 12-15 MPH WITH OCCASIONAL GUSTS TO
                    20 MPH DURING PEAK MIXING AROUND 3 PM. ERRATIC
                    WINDS IN THE VICINITY OF SHOWERS AND
                    THUNDERSTORMS.
MIXING HEIGHT.......7000 FT AGL.
MIXING WINDS........SOUTHWEST 14 MPH.

.TONIGHT...

SKY/WEATHER.........PARTLY CLOUDY. SLIGHT CHANCE OF RAIN SHOWERS
                    AND THUNDERSTORMS IN THE EVENING.
CWR.................10 PERCENT.
MIN TEMPERATURE.....47-52.
MAX HUMIDITY........63-68 PERCENT MID SLOPES 70-75 PERCENT VALLEYS.
WIND (20 FT)........VARIABLE 1-3 MPH.
MIXING HEIGHT.......200 FT AGL.
MIXING WINDS........DOWNSLOPE/DOWNVALLEY 3-5 MPH.

.MONDAY...

SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF RAIN SHOWERS AND
                    THUNDERSTORMS IN THE AFTERNOON.
CWR.................20 PERCENT.
MAX TEMPERATURE.....73-78.
MIN HUMIDITY........14-19 PERCENT.
WIND (20 FT)........SOUTH WINDS 6-10 MPH BECOMING WEST 6-10 MPH
                    LATE AFTERNOON WITH GUSTS TO 18 MPH. ERRATIC
                    WINDS IN THE VICINITY OF SHOWERS AND
                    THUNDERSTORMS.
MIXING HEIGHT.......5500 FT AGL.
MIXING WINDS........SOUTHWEST 18 MPH.

$$
FORECASTER...LEACH
REQUESTED BY...JACQUIE PARKS
TYPE OF REQUEST...PRESCRIBED
.TAG 20120422.CHAFF.02/MSO