FNUS75 KBOI 271651
FWSBOI

SPOT FORECAST FOR ALKALI TUMBLEWEED...VALE BLM
NATIONAL WEATHER SERVICE BOISE ID
1051 AM MDT MON APR 27 2009

FORECAST IS BASED ON IGNITION TIME OF 1040 MDT ON APRIL 27.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

...WARM TODAY BUT TURNING COOL AND WET TONIGHT THROUGH TUESDAY...

.DISCUSSION...
A DEEPENING UPPER TROUGH OFF THE OREGON COAST WILL MOVE INLAND THIS
EVENING. THE MAIN SURFACE LOW IS EXPECTED TO BE INTO NORTHERN NEVADA
THIS AFTERNOON WHICH WILL BRING AN INCREASE IN SOUTHEASTERLY WINDS INTO THE
BURN AREA. OVERNIGHT PRECIPITATION IS EXPECTED TO SPREAD OVER ALL OF EASTERN
OREGON INCLUDING SNOW ABOVE 5000 FEET. NO SIGNIFICANT ACCUMULATION IS
EXPECTED THROUGH TUESDAY. OTHERWISE THIS UPPER TROUGH WILL REMAIN FAIRLY
STATIONARY OVER THE PACIFIC NORTHWEST THROUGH FRIDAY BRINGING CONTINUED COOL AND
UNSETTLED WEATHER.


.TODAY...

SKY/WEATHER.........MOSTLY CLOUDY.
MAX TEMPERATURE.....AROUND 65.
MIN HUMIDITY........AROUND 30 PERCENT.
WIND - EYE LEVEL....SOUTHEAST 2 TO 5 MPH THIS MORNING BECOMING 5 TO 10 MPH WITH GUSTS
                    TO 15 MPH BY THIS AFTERNOON.
HAINES INDEX........3 VERY LOW.
MIXING HEIGHT.......7500 FT AGL.
TRANSPORT WIND......SOUTHEAST AROUND 15 MPH.
VENTILATION INDEX...700 + EXCELLENT

.TONIGHT...

SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS IN THE
                    EVENING...THEN SHOWERS LIKELY AFTER MIDNIGHT.
MIN TEMPERATURE.....40 TO 45.
MAX HUMIDITY........58 TO 63 PERCENT.
WIND - EYE LEVEL....NORTHWEST AROUND 8 MPH.
HAINES INDEX........3 VERY LOW.
MIXING HEIGHT.......1000 FT AGL.
TRANSPORT WIND......WEST AROUND 5 MPH.
VENTILATION INDEX...LESS THAN 100 POOR.

.TUESDAY...

SKY/WEATHER.........MOSTLY CLOUDY. RAIN SHOWERS LIKELY.
MAX TEMPERATURE.....53 TO 58.
MIN HUMIDITY........35 TO 40 PERCENT.
WIND - EYE LEVEL....WEST TO NORTHWEST 6 TO 12 MPH WITH AFTERNOON GUSTS TO 18 MPH.
HAINES INDEX........3 VERY LOW.
MIXING HEIGHT.......4500 FT AGL.
TRANSPORT WIND......NORTHWEST AROUND 10 MPH.
VENTILATION INDEX...450 FAIR.

$$
FORECASTER...REDMAN
REQUESTED BY...JASON BUNKER
TYPE OF REQUEST...PRESCRIBED
.TAG 20090427.ALKAL.01/BOI