THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A FIREWEATHER WATCH FOR HOT TEMPERATURES, GUSTY WINDS, AND LOW RELATIVE HUMIDITY, WHICH IS IN EFFECT FROM FRIDAY MORNING THROUGH SATURDAY EVENING.

* AFFECTED AREA...EASTERN GLACIER TOOLE CENTRAL EASTERN PONDERA LIBERTY, HILL AND BLAINE COUNTIES, LEWIS AND CLARK NATIONAL FOREST ROCKY MOUNTAIN DISTRICT-ROCKY MOUNTAIN FRONT, CHOUTEAU AND FERGUS COUNTIES AND CENTRAL AND EASTERN LEWIS AND CLARK NATIONAL FOREST AREAS.

* WINDS...WESTERLY 10 TO 20 MPH WITH GUSTS UP TO 35 MPH.

* RELATIVE HUMIDITY...AS LOW AS 10 TO 15 PERCENT.

* TEMPERATURES...MOSTLY 90S AND 100S.

* THUNDERSTORMS...ISOLATED TO WIDELY SCATTERED SHOWERS AND THUNDERSTORMS MAY CAUSE LOCALIZED STRONG, AND ERRATIC WIND GUSTS AND LIGHTNING, MOSTLY OVER ZONES 115 AND 117 SATURDAY AFTERNOON.

* IMPACTS...CONTAINMENT OF ANY ONGOING OR NEW FIRES MAY BE VERY DIFFICULT.