National Weather Service

Watches, Warnings, and Advisories:

EARLY FALL SYSTEM TO IMPACT EASTERN IDAHO THIS LABOR DAY WEEKEND

EASTERN MAGIC VALLEY-SAWTOOTH MOUNTAINS-UPPER SNAKE HIGHLANDS- UPPER SNAKE RIVER PLAIN-LOWER SNAKE RIVER PLAIN- SOUTH CENTRAL HIGHLANDS-CARIBOU HIGHLANDS- CACHE VALLEY/IDAHO PORTION-WASATCH MOUNTAINS/IDAHO PORTION- BIG AND LITTLE WOOD RIVER REGION-LOST RIVER/PAHSIMEROI- INCLUDING THE CITIES OF, BURLEY, RUPERT, SHOSHONE, CAREY, STANLEY, CLAYTON, DRIGGS, DUBOIS, ISLAND PARK, ST. ANTHONY, IDAHO FALLS, REXBURG, RIGBY, POCATELLO, BLACKFOOT, FORT HALL, AMERICAN FALLS, MALAD CITY, OAKLEY, ROCKLAND, DOWNEY, LAVA HOT SPRINGS, SODA SPRINGS, WAYAN, PRESTON, DAYTON, MONTPELIER, GEORGETOWN, PARIS, HAILEY, KETCHUM, BELLEVUE, ARCO, CHALLIS, MACKAY



A STRONG PACIFIC STORM SYSTEM WILL MOVE INTO EASTERN IDAHO LATE
THIS LABOR DAY WEEKEND. THE SYSTEM WILL BRING A DRAMATIC CHANGE
IN THE WEATHER BEGINNING SUNDAY. PRECIPITATION WILL BE ON THE
INCREASE BEGINNING SATURDAY NIGHT...AND LASTING THROUGH MONDAY
OVER MUCH OF THE REGION.

THE MOST DRAMATIC CHANGE WILL BE THE TEMPERATURES. DAYTIME HIGHS
FOR SATURDAY ARE FORECAST TO BE AROUND 5 DEGREES ABOVE NORMAL FOR
THIS TIME OF YEAR. BY MONDAY...THEY ARE FORECAST TO BE 15 TO 20
DEGREES BELOW NORMAL. AT THIS TIME...OVERNIGHT LOWS ARE FORECAST
TO REMAIN ABOVE FREEZING EXCEPT ABOVE 7000 FEET...WHERE LIGHT
SNOWS WILL BE POSSIBLE SUNDAY NIGHT THROUGH MONDAY NIGHT.

IF YOU ARE PLANNING RECREATIONAL ACTIVITIES IN THE MOUNTAINS THIS
HOLIDAY WEEKEND...BE PREPARED FOR COOL AND WET WEATHER.

Hazardous Weather Outlook

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN IDAHO.

.DAY ONE...TODAY AND TONIGHT

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS VERY LOW.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

WARMER WEATHER WILL CONTINUE ON SATURDAY AHEAD OF A COLD FRONT.
STRONG WIND GUSTS AND LOW AFTERNOON HUMIDITY ARE POSSIBLE ACROSS
PORTIONS OF THE CENTRAL MOUNTAINS AND SOUTHERN HIGHLANDS. A FIRE
WEATHER WATCH HAS BEEN ISSUED FOR THESE AREAS. PLEASE SEE RFWPIH
FOR MORE INFORMATION. ISOLATED THUNDERSTORMS ARE EXPECTED MAINLY
ACROSS THE CENTRAL MOUNTAINS SATURDAY AFTERNOON/EVENING. THE
CHANCE OF PRECIPITATION INCREASES ON SUNDAY AND WILL CONTINUE INTO
MONDAY NIGHT. SNOW LEVELS WILL DROP AS THE STORM SYSTEM APPROACHES
AND PASSES OVER IDAHO. RIGHT NOW...SNOW OR A RAIN/SNOW MIX IS
POSSIBLE DOWN TO AROUND 8000 FEET SUNDAY NIGHT AND MONDAY. AT THIS
TIME...IT IS HARD TO PINPOINT SNOW ACCUMULATIONS. HOWEVER...THE
POTENTIAL FOR SNOWFALL AND SOME ACCUMULATION EXISTS IN THE HIGHEST
OF ELEVATIONS. HIGH AMOUNTS OF RAINFALL AMOUNTS ARE ALSO FORECAST
FOR THE MOUNTAINS...ESPECIALLY SUNDAY AND INTO LABOR DAY. ANYONE TRAVELLING
FOR THE HOLIDAY WEEKEND WILL NEED TO KEEP ABREAST OF THE LATEST
FORECAST AND BE PREPARED FOR COLDER TEMPERATURES...WET CONDITIONS
AND WINTER LIKE WEATHER IN HIGHER TERRAIN.

BY MIDWEEK...WARMER WEATHER WILL RETURN WITH A SLIGHT CHANCE OF
MOUNTAIN SHOWERS POSSIBLE FOR THE REST OF THE EXTENDED FORECAST.

.SPOTTER INFORMATION STATEMENT...

WE ASK TRAINED SPOTTERS AND CITIZENS TO REPORT SIGNIFICANT
WEATHER CONDITIONS WHEN IT IS SAFE TO DO SO. THESE CONDITIONS MAY
INCLUDE HAIL...TORNADOES...STRONG WIND...DUST STORMS...SNOWFALL...
EXTREME COLD TEMPERATURES...FREEZING RAIN OR HEAVY RAIN...DENSE
FOG...AND FLOODING OR ICE JAMS. INFORMATION ABOUT THESE HAZARDOUS
CONDITIONS SHOULD BE CALLED INTO YOUR NATIONAL WEATHER SERVICE
OFFICE IN POCATELLO USING THE 1-800 SEVERE WEATHER HOTLINE...OR
208-233-0834.

Note: Headlines from multiple areas may be shown.

Tonight: Mostly clear. Lows 48 to 52. Southwest winds around 10 mph shifting to the southeast after midnight.
Saturday: Mostly sunny. Highs around 91. South winds around 10 mph shifting to the southwest 15 to 20 mph in the afternoon.
Saturday Night: Partly cloudy in the evening...then mostly cloudy with a 20 percent chance of thunderstorms after midnight. Lows around 54. South winds 10 to 15 mph.
Sunday: Partly sunny with a 20 percent chance of thunderstorms. Breezy...cooler. Highs around 74. Southwest winds 10 to 15 mph increasing to south 20 to 25 mph in the afternoon.
Sunday Night: Mostly cloudy. Slight chance of thunderstorms in the evening...then chance of rain showers after midnight. Colder. Lows around 44. South winds 10 to 15 mph. Chance of precipitation 30 percent.
Labor Day: Partly sunny with a 30 percent chance of showers. Highs around 62.

Recreational Forecasts

AMERICAN FALLS