Expires:200911221215;;123629 FPUS55 KRIW 212211 ZFPRIW ZONE FORECAST PRODUCT FOR WESTERN AND CENTRAL WYOMING NATIONAL WEATHER SERVICE RIVERTON WY 311 PM MST SAT NOV 21 2009 WYZ001-221215- YELLOWSTONE NATIONAL PARK- INCLUDING THE CITIES OF...LAKE...MAMMOTH...OLD FAITHFUL 311 PM MST SAT NOV 21 2009 .TONIGHT...BREEZY. MOSTLY CLOUDY WITH A 30 PERCENT CHANCE OF SNOW IN THE EVENING...THEN PARTLY CLOUDY AFTER MIDNIGHT. LOWS 6 TO 12. SOUTHWEST WINDS 15 TO 20 MPH. .SUNDAY...BREEZY. SNOW LIKELY IN THE MORNING...THEN SNOW IN THE AFTERNOON. SNOW ACCUMULATION OF 2 TO 3 INCHES. HIGHS 23 TO 29. WEST WINDS 15 TO 20 MPH. CHANCE OF SNOW NEAR 100 PERCENT. .SUNDAY NIGHT...SNOW LIKELY. SNOW ACCUMULATION OF 1 TO 2 INCHES. TOTAL SNOW ACCUMULATION 3 TO 5 INCHES. LOWS 7 TO 13. WEST WINDS AROUND 15 MPH. CHANCE OF SNOW 70 PERCENT. .MONDAY...MOSTLY CLOUDY IN THE MORNING THEN BECOMING PARTLY CLOUDY. A 20 PERCENT CHANCE OF SNOW SHOWERS. HIGHS 20 TO 26. .MONDAY NIGHT...MOSTLY CLOUDY WITH A 20 PERCENT CHANCE OF SNOW SHOWERS. LOWS 6 TO 14. .TUESDAY...NOT AS COLD. PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF SNOW SHOWERS. HIGHS 28 TO 34. .TUESDAY NIGHT...PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF SNOW. LOWS 13 TO 19. .WEDNESDAY...PARTLY CLOUDY. HIGHS 31 TO 37. .WEDNESDAY NIGHT...PARTLY CLOUDY. LOWS 14 TO 20. .THANKSGIVING DAY...PARTLY CLOUDY. HIGHS 32 TO 38. .THURSDAY NIGHT...PARTLY CLOUDY. LOWS 13 TO 19. .FRIDAY...MOSTLY CLOUDY. CHANCE OF SNOW IN THE MORNING...THEN CHANCE OF SNOW AND RAIN IN THE AFTERNOON. HIGHS 32 TO 38. CHANCE OF PRECIPITATION 40 PERCENT. .FRIDAY NIGHT...MOSTLY CLOUDY WITH A 20 PERCENT CHANCE OF SNOW. LOWS 15 TO 21. .SATURDAY...MOSTLY CLOUDY WITH A 20 PERCENT CHANCE OF SNOW. HIGHS 24 TO 30. $$