FNUS75 KBOU 241223
FWSBOU

SPOT FORECAST FOR GLACIER BASIN PILE BURN...USFS
NATIONAL WEATHER SERVICE DENVER CO
623 AM MDT THU SEP 24 2009

IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...A COOL AND MOIST AIRMASS WILL REMAIN OVER THE AREA
TODAY.  SCATTERED RAIN AND SNOW SHOWERS WILL DEVELOP MAINLY AFTER
1200 WITH LIGHT PRECIPITATION AMOUNTS.  I THINK DISPERSION WILL BE
POOR THRU 1200 POSSIBLY IMPROVING TO FAIR AFTER 1200.  DISPERSION
COULD BE BETTER THAN FOECAST IF WINDS INCREASE BY AFTERNOON.



...THUNDERSTORMS IMPLY STRONG...GUSTY AND ERRATIC WINDS...

.TODAY...
SKY/WEATHER.........MOSTLY CLOUDY. SLIGHT CHANCE OF SNOW SHOWERS
                    UNTIL 1200...THEN CHANCE OF RAIN SHOWERS AND
                    SNOW SHOWERS.
MAX TEMPERATURE.....46.
MIN HUMIDITY........55%.
20-FOOT WINDS.......NORTHWEST AROUND 5 MPH UNTIL 0900...THEN
                    UPSLOPE/UPVALLEY 5-7 MPH UNTIL 1200...THEN
                    NORTH 5-10 MPH.
TRANSPORT WINDS.....NORTH 10-20 MPH.
MIXING HEIGHT.......3000-4000 FT AGL.
SMOKE DISPERSAL.....POOR UNTIL 1200. FAIR AFTER 1200.
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE
                    PLUME  DOMINATED FIRE GROWTH.

.TONIGHT...
SKY/WEATHER.........PARTLY CLOUDY(50-60%). SLIGHT CHANCE OF RAIN
                    SHOWERS AND SNOW SHOWERS.
MIN TEMPERATURE.....31.
MAX HUMIDITY........78%.
20-FOOT WINDS.......DOWNSLOPE/DOWNVALLEY 2-8 MPH UNTIL 2400...THEN
                    WEST 8-12 MPH.
TRANSPORT WINDS.....NORTHWEST 9-14 MPH.
MIXING HEIGHT.......3000-4000 FT AGL UNTIL 2100. 1000-2000 FT AGL
                    AFTER 2400.
SMOKE DISPERSAL.....FAIR UNTIL 2000. POOR AFTER 2300.
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE
                    PLUME  DOMINATED FIRE GROWTH.

.FRIDAY...
SKY/WEATHER.........MOSTLY CLOUDY UNTIL 1200...THEN PARTLY
                    CLOUDY(30-40%). SLIGHT CHANCE OF RAIN SHOWERS
                    AND SNOW SHOWERS UNTIL 1200...THEN SLIGHT
                    CHANCE OF THUNDERSTORMS.
MAX TEMPERATURE.....50.
MIN HUMIDITY........35%.
20-FOOT WINDS.......NORTHWEST 9-15 MPH.
TRANSPORT WINDS.....NORTHWEST 17-28 MPH.
MIXING HEIGHT.......1800-2800 FT AGL UNTIL 0900...THEN 5000-6000 FT
                    AGL.
SMOKE DISPERSAL.....POOR UNTIL 0700. VERY GOOD AFTER 0900.
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.

.FORECAST DAYS 3 THROUGH 5...
.SATURDAY...MOSTLY CLEAR. WARMER. LOWS IN THE MID 30S. HIGHS IN
THE LOWER 60S. WEST WINDS AROUND 8 MPH.
.SUNDAY...MOSTLY CLEAR. LOWS IN THE UPPER 30S. HIGHS IN THE MID
60S. WEST WINDS AROUND 8 MPH.
.MONDAY...MOSTLY CLEAR. LOWS IN THE MID 30S. HIGHS AROUND 60.
TYPICAL SLOPE/VALLEY WINDS LESS THAN 10 MPH.



$$
WFO BOULDER
REQUESTED BY...JAMES CHAMP
REASON FOR REQUEST...PRESCRIBED
.TAG 20090924.GLACI.01/BOU