FNUS75 KBYZ 231430
FWSBYZ

SPOT FORECAST FOR EMIGRANT...USDA FOREST SERVICE GALLATIN NATIONAL FOREST
NATIONAL WEATHER SERVICE BILLINGS MT
830 AM MDT TUE JUL 23 2013

FORECAST IS BASED ON REQUEST TIME OF 0803 MDT ON JULY 23.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
...HUMIDITY MINIMUMS NEAR 10 PERCENT AND POOR RECOVERIES CONTINUE...
WINDS WILL BE LIGHTER OVER THE FIRE TODAY BUT IT WILL REMAIN VERY DRY
WITH MINIMUMS AROUND 10 PERCENT. TEMPERATURES WILL BE SIMILAR BUT
IT WILL TAKE A BIT LONGER TO HIT MAXIMUM TEMPERATURES BECAUSE OF
SLOWER MIXING. LIGHTER WINDS ALOFT WILL ALLOW SLOPE WINDS TO DOMINATE
WITH RIDGETOP WINDS EXPECTED TO BE LESS THAN 15 MPH. EXPECT ANOTHER
POOR RECOVERY TONIGHT WITH SIMILAR CONDITIONS ON WEDNESDAY. THE AIRMASS
IS UNSTABLE WITH HAINES INDEX OF 5 BOTH DAYS. A BIT OF MID LEVEL
MOISTURE WILL APPROACH THE FIRE ON WEDNESDAY PRODUCING MORE CUMULUS
CLOUDS WITH A THREAT OF THUNDERSTORMS ON THURSDAY. BORSUM

.TODAY...

SKY/WEATHER.........SUNNY.
CWR.................0 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MAX TEMPERATURE.....76-81.
MIN HUMIDITY........9-14 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......UPSLOPE 4 TO 8 MPH.
 RIDGETOP...........NORTHWEST 10 TO 15 MPH.
MIXING HEIGHT.......5300 FT AGL.
MIXING WINDS........NORTHWEST 10 TO 15 MPH.
HAINES INDEX........5.

.TONIGHT...

SKY/WEATHER.........MOSTLY CLEAR.
CWR.................0 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MIN TEMPERATURE.....49-54.
MAX HUMIDITY........33-37 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......DOWNSLOPE/DOWNVALLEY 3 TO 6 MPH.
 RIDGETOP...........NORTH 5 TO 10 MPH.
MIXING HEIGHT.......1200 FT AGL.
MIXING WINDS........NORTH 5 TO 10 MPH.
HAINES INDEX........4.

.WEDNESDAY...

SKY/WEATHER.........MOSTLY SUNNY.
CWR.................ZERO.
LAL.................1...NONE.
MAX TEMPERATURE.....80-85.
MIN HUMIDITY........14-18 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......UPSLOPE/UPVALLEY 4 TO 8 MPH.
 RIDGETOP...........WEST 10 TO 15 MPH.
MIXING HEIGHT.......6300 FT AGL.
MIXING WINDS........WEST 10 TO 15 MPH.
HAINES INDEX........5.

$$
FORECASTER...BORSUM
REQUESTED BY...CRISTI HEANEY
TYPE OF REQUEST...WILDFIRE
.TAG 20130723.EMIGR.01/BYZ