FNUS75 KBYZ 041739
FWSBYZ

SPOT FORECAST FOR E-R RX...BILLINGS BLM
NATIONAL WEATHER SERVICE BILLINGS MT
1139 AM MDT MON MAY 4 2009

FORECAST IS BASED ON IGNITION TIME OF 1000 MDT ON MAY 06.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
OVERALL IT WILL BE HARD TO FIND A DRY DAY OR EVEN A DAY WITH LIGHT WINDS
AS AN ACTIVE WESTERLY FLOW OF WINDS ALOFT WILL BE OVER THE AREA. IT WILL
BE TRICKY TIMING THESE SYSTEMS INTO THE AREA. AT THIS TIME...IT DOES LOOK
LIKE THE REMAINDER OF TODAY AND INTO TONIGHT WILL BE MAINLY DRY. THE NEXT
CHANCE OF MOISTURE WILL BE A TUESDAY AND TUESDAY EVENING. THERE WILL
ALSO BE A CHANCE OF WEDNESDAY...BUT THE SYSTEM ON THIS DAY LOOKS TO
BE WEAK. ANOTHER...STRONGER SYSTEM...SIMLIAR TO TUESDAY...WILL MOVE
ACROSS THURSDAY. LOOK FOR AFTERNOON GUSTY WINDS EACH DAY AS WELL.


.TODAY...

SKY/WEATHER.........MOSTLY CLOUDY. ISOLATED RAIN SHOWERS IN THE
                    AFTERNOON.
CWR.................5 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MAX TEMPERATURE.....56-61.
MIN HUMIDITY........30-35 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......WEST WINDS 15 TO 25 MPH.
 RIDGETOP...........NORTHWEST 25 TO 40 MPH.
MIXING HEIGHT.......10200 FT AGL.
MIXING WINDS........NORTHWEST 20 TO 35 MPH.

.TONIGHT...

SKY/WEATHER.........PARTLY CLOUDY.
CWR.................0 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MIN TEMPERATURE.....35-40.
MAX HUMIDITY........75-80 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......NORTHWEST WINDS 5 TO 15 MPH IN THE EVENING
                    SHIFTING TO THE SOUTHWEST 5 TO 10 MPH
                    OVERNIGHT.
 RIDGETOP...........WEST 10 TO 20 MPH.
MIXING HEIGHT.......300 FT AGL.
MIXING WINDS........SOUTHWEST 15 TO 25 MPH.

.TUESDAY...

SKY/WEATHER.........MOSTLY CLOUDY. SCATTERED RAIN SHOWERS THROUGH
                    THE DAY. ISOLATED THUNDERSTORMS IN THE
                    AFTERNOON.
CWR.................13 PERCENT.
LAL.................2...1 TO 8 STRIKES/15 MIN/CELL.
MAX TEMPERATURE.....63-68.
MIN HUMIDITY........31-36 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......WEST WINDS 10 TO 15 MPH. GUSTY AND ERRATIC WINDS
                    EXPECTED NEAR THUNDERSTORMS IN THE AFTERNOON.
 RIDGETOP...........WEST 15 TO 25 MPH.
MIXING HEIGHT.......10100 FT AGL.
MIXING WINDS........SOUTHWEST 15 TO 25 MPH.

.FORECAST DAYS 3 THROUGH 7...
.WEDNESDAY...
MOSTLY CLOUDY. ISOLATED SHOWERS AND ISOLATED THUNDERSTORMS. LOWS
37 TO 42. HIGHS 64 TO 69. WEST WINDS 10 TO 15 MPH.
.THURSDAY...
MOSTLY CLOUDY. SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS. LOWS
38 TO 43. HIGHS 64 TO 69. WEST WINDS 10 TO 20 MPH.
.FRIDAY...
MOSTLY CLOUDY. SCATTERED SHOWERS. LOWS 35 TO 40. HIGHS 61 TO 66.
WEST WINDS 10 TO 20 MPH.
.SATURDAY...
PARTLY CLOUDY. ISOLATED SHOWERS. LOWS 34 TO 39. HIGHS 61 TO 66.
.SUNDAY...
MOSTLY CLOUDY. SCATTERED SHOWERS. LOWS 36 TO 41. HIGHS 60 TO 65.

$$
FORECASTER...RASCH
REQUESTED BY...STEVE UNDERWOOD
TYPE OF REQUEST...PRESCRIBED
.TAG 20090506.ERRX_.01/BYZ