FNUS75 KBOI 221911
FWSBOI

SPOT FORECAST FOR THUNDER CITY...PAYETTE NF
NATIONAL WEATHER SERVICE BOISE ID
111 PM MDT MON JUL 22 2013

FORECAST IS BASED ON REQUEST TIME OF 1254 MDT ON JULY 22.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

...WARM AND VERY DRY TODAY WITH GUSTY WINDS OVER RIDGES...
...FAIR VENTILATION TOMORROW DUE TO LESS MIXING AND TRANSPORT WINDS...

.DISCUSSION...HIGH PRESSURE TO OUR SOUTH WILL KEEP WARM AND VERY DRY CONDITIONS FOR
THE THUNDER CITY FIRE AREA TODAY AND TUESDAY. A WEAK DISTURBANCE IS MOVING EAST THROUGH
NORTHERN IDAHO WHICH WILL BRING SLIGHTLY HIGHER WINDS TO THE RIDGES THIS AFTERNOON
ONCE THE INVERSION LIFTS. DRYNESS AND INSTABILITY IN THE ATMOSPHERE SUGGESTS THAT
HAINES 5 WILL CREATE MODERATE POTENTIAL FOR PLUME DOMINATED FIRE. BY TOMORROW THE MIXING
HEIGHTS AND TRANSPORT WINDS WILL BE A BIT LOWER FOR FAIR VENTILATION. THE NEXT CHANCE
OF THUNDERSTORMS WILL BE THURSDAY ALTHOUGH ITS MORE LIKELY THAT THUNDERSTORMS WILL
BE FURTHER SOUTH OF THE FIRE.

.REST OF TODAY...

SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....UPPER THIRD TO RIDGE 6000 TO 8500 FEET: 70 TO 76.

MIN HUMIDITY........UPPER THIRD TO RIDGE 6000 TO 8500 FEET: 9 TO 11 PERCENT.
WIND - EYE LEVEL....WEST 10 TO 14 MPH WITH GUSTS TO 24 MPH.
HAINES INDEX........5 MODERATE.
MIXING HEIGHT.......7500 FT AGL.
TRANSPORT WIND......WEST AROUND 20 MPH.
VENTILATION INDEX...1500 EXCELLENT.

.TONIGHT...

SKY/WEATHER.........CLEAR.
MIN TEMPERATURE.....46 TO 51.
MAX HUMIDITY........31 TO 39 PERCENT.
WIND - EYE LEVEL....NORTHWEST 4 TO 10 MPH. GUSTS UP TO 18 MPH IN
                    THE EVENING.
HAINES INDEX........5 MODERATE.
MIXING HEIGHT.......500 FT AGL.
TRANSPORT WIND......NORTH AROUND 5 MPH.
VENTILATION INDEX...50 POOR.

.TUESDAY...

SKY/WEATHER.........SUNNY WITH FAIR VENTILATION DUE TO LESS MIXING AND LOWER TRANSPORT WINDS.
MAX TEMPERATURE.....UPPER THIRD TO RIDGE 6000 TO 8500 FEET: 73 TO 78.

MIN HUMIDITY........UPPER THIRD TO RIDGE 6000 TO 8500 FEET: 9 TO 11 PERCENT.
WIND - EYE LEVEL....SOUTHWEST 3 TO 5 MPH IN THE MORNING...SHIFTING
                    TO THE NORTHWEST 5 TO 8 MPH IN THE AFTERNOON.
HAINES INDEX........5 MODERATE.
MIXING HEIGHT.......8000 FT AGL.
TRANSPORT WIND......NORTHWEST 5 TO 10 MPH.
VENTILATION INDEX...400 FAIR.

$$
FORECASTER...DECKER
REQUESTED BY...PAYETTE NATIONAL FOREST
TYPE OF REQUEST...WILDFIRE
.TAG 20130722.THUND.01/BOI