193 
FNUS75 KBOI 291641
FWSBOI

Spot Forecast for Highline...USFS
National Weather Service Boise ID
1041 AM MDT Tue Aug 29 2017

Forecast is based on request time of 1000 MDT on August 29. 
If conditions become unrepresentative...contact the National Weather
Service.

...FIRE WEATHER WATCH FOR LIGHTNING IN EFFECT WEDNESDAY AFTERNOON 
THROUGH WEDNESDAY EVENING...

.DISCUSSION...Isolated showers and thunderstorms will continue
near the Highline Fire through tonight. Storms will be capable of
producing outflow wind gusts to 55 mph and rainfall up to one-
half inch under storm cores. Light rain showers will persist 
overnight tonight, with another round of convective activity 
kicking off mid-day Wednesday. Wednesday looks to be the most 
active day as instability increases ahead of an an approaching 
upper level trough. Southwest winds will increase out ahead of 
this system. Haines 5 conditions will continue through Wednesday. 

Thursday will be cool and breezy (out of the northwest) behind 
the exiting trough. High pressure will gradually build back into 
Idaho Friday and Saturday, bringing a return to hot and dry 
conditions. 

.REST OF TODAY...

Sky/weather.........Partly cloudy with isolated showers and 
                    thunderstorms. Thunderstorms may produce 
                    gusty winds in the afternoon. Chance of 
                    precipitation 20 percent. 
CWR /0.10 inch/.....5 percent. 
LAL.................2 in the morning, increasing to 3 this
                    afternoon. 
Max temperature.....80 to 85. 
Min humidity........13 to 18 percent. 
Wind - eye level....Downslope 1 to 4 mph in the morning, 
                    becoming southwest 4 to 6 mph, with
                    ridgetop gusts to 14 mph, in the
                    afternoon. 
Haines Index........5 moderate. 
Mixing height.......9000 ft AGL. 
Transport winds.....Southwest around 15 mph. 
Ventilation index...1350 Excellent. 

.TONIGHT...

Sky/weather.........Partly cloudy with a 20 percent chance of 
                    showers.
CWR /0.10 inch/.....10 percent. 
LAL.................1. 
Min temperature.....48 to 53. 
Max humidity........50 to 55 percent. 
Wind - eye level....Southwest 4 to 6 mph, with ridgetop gusts 
                    to 14 mph, through midnight.  After midnight,
                    valleys and midslopes will become downslope 
                    1 to 4 mph, but ridgetops will likely remain
                    southwest around 8 mph.                    
Haines Index........5 moderate. 
Mixing height.......200 ft AGL. 
Transport winds.....Southwest around 10 mph. 
Ventilation index...20 Poor. 

.WEDNESDAY...

Sky/weather.........Partly cloudy with a slight chance of showers
                    and thunderstorms. Thunderstorms may produce 
                    gusty winds in the afternoon. Chance of 
                    precipitation 20 percent. 
CWR /0.10 inch/.....10 percent. 
LAL.................3. 
Max temperature.....75 to 80. 
Min humidity........16 to 21 percent. 
Wind - eye level....Southwest 4 to 8 mph with ridgetop gusts to
                    17 mph. 
Haines Index........5 moderate. 
Mixing height.......10000 ft AGL. 
Transport winds.....Southwest around 20 mph. 
Ventilation index...2000 Excellent. 

$$
Forecaster...Thimmesch
Requested by...Steve Cobb
Type of request...WILDFIRE
.TAG 1714515.3/BOI