FNUS75 KBYZ 051410
FWSBYZ

SPOT FORECAST FOR BLACK SPRINGS RX...NORTHERN CHEYENNE
NATIONAL WEATHER SERVICE BILLINGS MT
810 AM MDT TUE MAY 5 2009

FORECAST IS BASED ON IGNITION TIME OF 1200 MDT ON MAY 05.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...

A VERY LIGHT RAIN SHOWER IS POSSIBLE THROUGH 10 AM AT THE BURN
SITE. SKIES WILL CLEAR AROUND 10 AM WITH WINDS SHIFTING TO THE
WEST AND INCREASING TO 10 TO 20 MPH WITH GUSTS TO AROUND 30 MPH
BY 11 AM. LATE THIS AFTERNOON ISOLATED TO SCATTERED SHOWERS AND
THUNDERSTORMS WILL BE POSSIBLE OVER THE BURN SITE...PERSISTING
THROUGH LATE EVENING. WINDS WILL WEAKEN BY LATE EVENING.
WEDNESDAY WILL SEE ANOTHER CHANCE OF SHOWERS AND THUNDERSTORMS
WITH GUSTY WESTERLY WINDS OVER THE AREA AGAIN. RELATIVE HUMIDITIES
WILL BE IN THE LOW TO MID 20S TODAY...WITH SLIGHTLY HIGHER
READINGS ON WEDNESDAY. CHAMBERS

.TODAY...

SKY/WEATHER.........MOSTLY CLOUDY EARLY...BECOMING PARTLY CLOUDY
                    BY MID DAY. ISOLATED VERY LIGHT SHOWERS POSSIBLE
                    EARLY THIS MORNING...SCATTERED SHOWERS AND THUNDERSTORMS
                    DEVELOPING AFTER 3 PM.
CWR.................10 PERCENT.
LAL.................2...1 TO 8 STRIKES/15 MIN/CELL.
MAX TEMPERATURE.....65-70.
MIN HUMIDITY........21-27 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......SOUTH WIND 8 TO 14 MPH GUSTS TO AROUND 20 MPH
                    IN THE MORNING...SHIFTING TO THE WEST 10 TO 20 MPH
                    WITH GUSTS TO AROUND 30 MPH BY 11 AM. GUSTY AND
                    ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS IN THE
                    AFTERNOON.
 RIDGETOP...........SOUTH 15 TO 25 MPH...BECOMING WEST BY 11 AM.
MIXING HEIGHT.......8200 FT AGL.
MIXING WINDS........WEST 15 TO 25 MPH.

.TONIGHT...

SKY/WEATHER.........PARTLY CLOUDY. SCATTERED RAIN SHOWERS AND
                    ISOLATED THUNDERSTORMS IN THE EVENING...THEN
                    ISOLATED RAIN SHOWERS OVERNIGHT.
CWR.................20 PERCENT.
LAL.................2...1 TO 8 STRIKES/15 MIN/CELL.
MIN TEMPERATURE.....40-43.
MAX HUMIDITY........86-91 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......WEST WINDS 10 TO 15 MPH WITH GUSTS TO AROUND 25 MPH
                    IN THE EVENING...BECOMING NORTHWEST 5 TO 10 MPH AROUND
                    10 PM. GUSTY AND ERRATIC WINDS EXPECTED NEAR
                    THUNDERSTORMS IN THE EVENING.
 RIDGETOP...........NORTHWEST 15 TO 25 MPH.
MIXING HEIGHT.......800 FT AGL.
MIXING WINDS........WEST 25 TO 40 MPH.

.WEDNESDAY...

SKY/WEATHER.........MOSTLY CLOUDY. SCATTERED RAIN SHOWERS AND
                    ISOLATED THUNDERSTORMS IN THE AFTERNOON.
CWR.................10 PERCENT.
LAL.................2...1 TO 8 STRIKES/15 MIN/CELL.
MAX TEMPERATURE.....60-64.
MIN HUMIDITY........25-30 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......WEST WINDS 5 TO 15 MPH. GUSTY AND ERRATIC WINDS
                    EXPECTED NEAR THUNDERSTORMS IN THE AFTERNOON.
 RIDGETOP...........WEST 15 TO 25 MPH.
MIXING HEIGHT.......10300 FT AGL.
MIXING WINDS........WEST 20 TO 35 MPH.

$$
FORECASTER...CHAMBERS
REQUESTED BY...LEE OLD BEAR
TYPE OF REQUEST...PRESCRIBED
.TAG 20090505.BLACK.01/BYZ