FNUS75 KBYZ 280513
FWSBYZ

SPOT FORECAST FOR STORY 1 MILE SOUTH...STORY FIRE DPT
NATIONAL WEATHER SERVICE BILLINGS MT
1113 PM MDT SAT APR 27 2013

FORECAST IS BASED ON REQUEST TIME OF 2253 MDT ON APRIL 27.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
WARM AIR AND LIGHT DOWNSLOPE WINDS ARE ACTUALLY CAUSING TEMPERATURES
TO GO UP LATE THIS EVENING AT THE FIRE SITE WITH HUMIDITY GOING DOWN.
AT 1050 PM THE TEMPERATURES HAD RISEN 13 DEGREES IN THE LAST HOUR TO 60
DEGREES WITH THE RH AT 23 PERCENT. A WEAK COLD FRONT IS EXPECTED TO MOVE
THROUGH THE FIRE SITE AROUND 2 AM CAUSING WINDS TO GO NORTH TO NORTHWEST
AT 10 TO 20 MPH. THERE IS A CHANCE OF A FEW GUSTS TO AROUND 32 MPH FOR A
FEW HOURS AFTER THE FRONTAL PASSAGE. LOOK FOR RH TO REMAIN IN THE LOWER 20S
UNTIL FRONTAL PASSAGE AND THEN RISE INTO THE 40 TO 50 PERCENT RANGE AGAIN
OVERNIGHT. THE CHANCE OF SHOWERS WILL BE GREATEST IN THE LATE AFTERNOON.
GUSTY WIND SHOULD BE BE EXPECTED NEAR STORMS WITH GUSTS TO 30 MPH POSSIBLE.


.REST OF TONIGHT...

SKY/WEATHER.........MOSTLY CLOUDY.
CWR.................0 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MIN TEMPERATURE.....46-49.
MAX HUMIDITY........48-55 PERCENT. HUMIDITY IN THE 20-30 PERCENT RANGE UNTIL
                    FRONTAL PASSAGE.
WIND (20 FT)........
 SLOPE/VALLEY.......WEST WIND UNDER 10 MPH THROUGH 130 AM...WINDS SHIFTING TO THE
                    NORTHWEST AT 10 TO 20 MPH WITH GUSTS TO AROUND 30 MPH POSSIBLE.
 RIDGETOP...........WEST 20 TO 35 MPH.
HAINES INDEX........5.

.SUNDAY...

SKY/WEATHER.........MOSTLY CLOUDY. SCATTERED RAIN SHOWERS AND
                    ISOLATED THUNDERSTORMS IN THE AFTERNOON.
CWR.................19 PERCENT.
LAL.................2...1 TO 8 STRIKES/15 MIN/CELL.
MAX TEMPERATURE.....57-62.
MIN HUMIDITY........25-33 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......NORTHWEST WINDS 10 TO 15 MPH. GUSTY AND ERRATIC
                    WINDS EXPECTED NEAR THUNDERSTORMS IN THE
                    AFTERNOON.
 RIDGETOP...........WEST 15 TO 25 MPH.
HAINES INDEX........4.

$$
FORECASTER...TESAR
REQUESTED BY...KIM
TYPE OF REQUEST...WILDFIRE
.TAG 20130427.STORY.01/BYZ