FPUS55 KBOU 181205 ZFPBOU Zone Forecast Product for Northeast Colorado National Weather Service Denver/Boulder CO 605 AM MDT Mon May 18 2026 COZ038>040-190300- Larimer County Below 6000 Feet/Northwest Weld County- Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County- North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County- Including Fort Collins, Hereford, Loveland, Nunn, Arvada, Boulder, Golden, Lakewood, Longmont, Aurora, Brighton, City of Denver, Denver International Airport, Highlands Ranch, Littleton, and Parker 605 AM MDT Mon May 18 2026 ...FREEZE WATCH IN EFFECT FROM LATE TONIGHT THROUGH TUESDAY MORNING... .TODAY...Rain showers through the day. Slight chance of thunderstorms and snow showers in the afternoon. No snow accumulation. Highs 39 to 45. Northeast winds 10 to 20 mph with gusts up to 30 mph. .TONIGHT...Mostly cloudy with a slight chance of snow showers. Chance of rain showers in the evening, then a slight chance of rain showers after midnight. Lows 26 to 34. North winds 10 to 15 mph with gusts up to 30 mph in the evening, becoming light. Chance of precipitation 40 percent. .TUESDAY...Mostly cloudy. Chance of rain showers in the afternoon. Highs 47 to 53. Chance of rain 30 percent. .TUESDAY NIGHT...Rain showers likely. Lows in the mid to upper 30s. Chance of rain 70 percent. .WEDNESDAY...Mostly cloudy with a 40 percent chance of thunderstorms. Highs near 60. .WEDNESDAY NIGHT...Mostly cloudy with a chance of rain showers and slight chance of thunderstorms. Lows near 40. Chance of rain 50 percent. .THURSDAY...Mostly cloudy with a 40 percent chance of thunderstorms. Highs in the mid to upper 60s. .THURSDAY NIGHT...Mostly cloudy with a chance of showers and slight chance of thunderstorms. Lows 37 to 43. Chance of rain 40 percent. .FRIDAY...Partly cloudy with a 20 percent chance of thunderstorms. Highs near 70. .FRIDAY NIGHT...Partly cloudy. Lows 40 to 46. .SATURDAY...Mostly sunny. Highs in the 70s. .SATURDAY NIGHT...Partly cloudy. Lows 44 to 50. .SUNDAY...Mostly sunny. Highs near 80. $$ COZ041-190300- Elbert/Central and East Douglas Counties Above 6000 Feet- Including Castle Rock, Elbert, Fondis, Kiowa, and Larkspur 605 AM MDT Mon May 18 2026 ...FREEZE WATCH IN EFFECT FROM LATE TONIGHT THROUGH TUESDAY MORNING... .TODAY...Rain showers and slight chance of thunderstorms through the day. Snow showers in the afternoon. No snow accumulation. Highs 43 to 51. Southeast winds 10 to 15 mph, becoming north in the afternoon. Gusts up to 30 mph. .TONIGHT...Cloudy. Chance of rain and snow showers in the evening, then a slight chance of snow showers after midnight. Lows in the mid 20s to lower 30s. North winds 10 to 20 mph with gusts up to 30 mph. Chance of precipitation 40 percent. .TUESDAY...Mostly cloudy. Chance of rain showers in the afternoon. Highs 48 to 54. Chance of rain 30 percent. .TUESDAY NIGHT...Rain showers likely. Lows in the 30s. Chance of rain 70 percent. .WEDNESDAY...Rain showers and chance of thunderstorms. Highs 54 to 60. South winds 20 to 25 mph with gusts up to 35 mph. .WEDNESDAY NIGHT...Showers likely and chance of thunderstorms. Lows in the mid to upper 30s. Chance of rain 60 percent. .THURSDAY...Mostly cloudy with a 50 percent chance of thunderstorms. Highs in the lower to mid 60s. .THURSDAY NIGHT AND FRIDAY...Mostly cloudy with a 40 percent chance of thunderstorms. Lows near 40. Highs in the mid to upper 60s. .FRIDAY NIGHT...Partly cloudy with a 10 percent chance of thunderstorms. Lows in the lower to mid 40s. .SATURDAY...Mostly sunny. Highs in the lower to mid 70s. .SATURDAY NIGHT...Partly cloudy. Lows in the mid to upper 40s. .SUNDAY...Mostly sunny. Highs 74 to 80. $$ COZ042>045-190300- Northeast Weld County-Central and SouthWeld County-Morgan County- Central and East Adams and Arapahoe Counties- Including Briggsdale, Grover, Pawnee Buttes, Raymer, Stoneham, Eaton, Fort Lupton, Greeley, Roggen, Brush, Fort Morgan, Goodrich, Wiggins, Bennett, Byers, Deer Trail, and Leader 605 AM MDT Mon May 18 2026 ...FREEZE WATCH IN EFFECT FROM LATE TONIGHT THROUGH TUESDAY MORNING... .TODAY...Rain showers through the day. Slight chance of thunderstorms in the afternoon. Highs 42 to 48. Northeast winds 15 to 25 mph with gusts up to 35 mph. .TONIGHT...Mostly cloudy with a slight chance of rain showers in the evening, then partly cloudy after midnight. Lows near 30. North winds 10 to 20 mph with gusts up to 30 mph in the evening, becoming light. Chance of rain 10 percent. .TUESDAY...Partly cloudy in the morning, then becoming mostly cloudy. Highs 51 to 57. .TUESDAY NIGHT...Cloudy with a 50 percent chance of rain showers. Lows in the mid to upper 30s. .WEDNESDAY...Mostly cloudy with a chance of rain showers and slight chance of thunderstorms. Highs in the lower 60s. South winds 10 to 20 mph with gusts up to 35 mph. Chance of rain 40 percent. .WEDNESDAY NIGHT...Mostly cloudy with a 40 percent chance of thunderstorms. Lows in the mid 30s to lower 40s. .THURSDAY...Partly cloudy with a 40 percent chance of thunderstorms. Highs in the upper 60s. .THURSDAY NIGHT...Mostly cloudy with a 50 percent chance of thunderstorms. Lows near 40. .FRIDAY...Partly cloudy with a 20 percent chance of thunderstorms. Highs around 70. .FRIDAY NIGHT...Partly cloudy with a 10 percent chance of thunderstorms. Lows in the lower to mid 40s. .SATURDAY...Mostly sunny. Highs in the mid to upper 70s. .SATURDAY NIGHT...Partly cloudy. Lows in the mid to upper 40s. .SUNDAY...Mostly sunny. Highs in the lower to mid 80s. $$ COZ046-047-190300- North and Northeast Elbert County Below 6000 Feet/North Lincoln County- Southeast Elbert County Below 6000 Feet/South Lincoln County- Including Agate, Hugo, Limon, Matheson, Forder, Karval, Kutch, and Punkin Center 605 AM MDT Mon May 18 2026 ...FREEZE WATCH IN EFFECT FROM LATE TONIGHT THROUGH TUESDAY MORNING... .TODAY...Chance of showers in the morning, then showers and slight chance of thunderstorms in the afternoon. Highs 50 to 60. East winds 10 to 15 mph with gusts up to 25 mph, becoming northeast 20 to 25 mph with gusts up to 45 mph in the afternoon. .TONIGHT...Mostly cloudy. Windy. Lows 26 to 32. North winds 20 to 30 mph with gusts up to 45 mph, diminishing to 15 to 20 mph with gusts up to 35 mph after midnight. .TUESDAY...Partly cloudy. Highs 54 to 60. .TUESDAY NIGHT...Mostly cloudy with a 50 percent chance of rain showers. Lows 33 to 39. East winds 10 to 15 mph with gusts up to 20 mph. .WEDNESDAY...Rain showers likely and slight chance of thunderstorms. Windy. Highs in the mid 50s to lower 60s. Southeast winds 20 to 30 mph with gusts up to 40 mph. Chance of rain 60 percent. .WEDNESDAY NIGHT...Rain showers likely and chance of thunderstorms. Lows in the mid to upper 30s. Chance of rain 70 percent. .THURSDAY...Mostly cloudy with a 40 percent chance of thunderstorms. Highs in the mid to upper 60s. .THURSDAY NIGHT...Mostly cloudy with a 50 percent chance of thunderstorms. Lows in the mid 30s to lower 40s. .FRIDAY...Partly cloudy with a 20 percent chance of thunderstorms. Highs in the mid 60s to lower 70s. .FRIDAY NIGHT...Partly cloudy with a chance of showers and slight chance of thunderstorms. Lows near 40. Chance of rain 30 percent. .SATURDAY...Mostly sunny. Highs in the mid to upper 70s. .SATURDAY NIGHT...Partly cloudy. Lows 41 to 47. .SUNDAY...Mostly sunny. Highs near 80. $$ COZ048>051-190300- Logan County-Washington County-Sedgwick County-Phillips County- Including Crook, Merino, Sterling, Peetz, Akron, Cope, Last Chance, Otis, Julesburg, Ovid, Sedgwick, Amherst, Haxtun, and Holyoke 605 AM MDT Mon May 18 2026 ...FREEZE WATCH IN EFFECT FROM LATE TONIGHT THROUGH TUESDAY MORNING... .TODAY...Showers likely until late afternoon, then showers late in the afternoon. Highs in the mid to upper 40s. Northeast winds 15 to 25 mph with gusts up to 35 mph. .TONIGHT...Mostly cloudy. Lows in the lower 30s. North winds 15 to 25 mph. Gusts up to 35 mph in the evening. .TUESDAY...Partly cloudy. Highs in the mid 50s to lower 60s. Northwest winds 10 to 15 mph with gusts up to 20 mph in the morning, becoming light. .TUESDAY NIGHT...Mostly cloudy with a 30 percent chance of showers. Lows in the upper 30s. .WEDNESDAY...Mostly cloudy with a 30 percent chance of showers. Highs near 60. South winds 15 to 25 mph with gusts up to 40 mph. .WEDNESDAY NIGHT...Mostly cloudy with a chance of showers and slight chance of thunderstorms. Lows in the upper 30s. Chance of rain 30 percent. .THURSDAY AND THURSDAY NIGHT...Mostly cloudy with a 50 percent chance of thunderstorms. Highs in the mid 60s to lower 70s. Lows around 40. .FRIDAY...Mostly cloudy with a 20 percent chance of thunderstorms. Highs around 70. .FRIDAY NIGHT...Partly cloudy with a chance of showers and slight chance of thunderstorms. Lows in the lower 40s. Chance of rain 30 percent. .SATURDAY AND SATURDAY NIGHT...Partly cloudy. Highs in the upper 70s. Lows in the upper 40s. .SUNDAY...Mostly sunny. Highs in the lower to mid 80s. $$ COZ035-190300- Larimer and Boulder Counties Between 6000 and 9000 Feet- Including Estes Park, Glendevey, Nederland, and Red Feather Lakes 605 AM MDT Mon May 18 2026 .TODAY...Snow showers. Snow accumulation of 4 to 7 inches. Highs 31 to 39. Northeast winds 10 to 15 mph with gusts up to 25 mph. .TONIGHT...Mostly cloudy with a 50 percent chance of snow showers. Lows 20 to 28. .TUESDAY...Slight chance of snow showers in the morning, then snow showers likely, chance of rain showers and slight chance of thunderstorms in the afternoon. Snow accumulation up to 1 inch. Highs 35 to 45. Chance of precipitation 70 percent. .TUESDAY NIGHT...Mostly cloudy with a chance of rain and snow showers. Lows 24 to 34. Chance of precipitation 40 percent. .WEDNESDAY...Rain showers likely, chance of thunderstorms and slight chance of snow showers. Highs 47 to 57. Chance of precipitation 70 percent. .WEDNESDAY NIGHT...Partly cloudy with a 10 percent chance of rain showers. Lows 26 to 36. .THURSDAY...Rain showers likely and chance of thunderstorms. Highs 53 to 63. Chance of rain 60 percent. .THURSDAY NIGHT...Mostly cloudy with a chance of rain showers, slight chance of thunderstorms and snow showers. Lows 29 to 39. Chance of precipitation 40 percent. .FRIDAY...Mostly cloudy with a chance of thunderstorms and slight chance of snow showers. Highs 56 to 66. Chance of snow 30 percent. .FRIDAY NIGHT...Partly cloudy. Lows 32 to 42. .SATURDAY...Mostly sunny. Highs 62 to 72. .SATURDAY NIGHT...Partly cloudy. Lows 37 to 47. .SUNDAY...Mostly sunny. Highs 67 to 77. $$ COZ036-190300- Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- Including Bailey, Central City, Evergreen, Georgetown, Idaho Springs, and Westcreek 605 AM MDT Mon May 18 2026 .TODAY...Snow showers, rain showers and chance of thunderstorms. Snow accumulation up to 3 inches. Highs 36 to 46. North winds 10 to 15 mph in the afternoon. .TONIGHT...Chance of rain showers in the evening. Cloudy with a chance of snow showers. Lows 23 to 31. Chance of precipitation 50 percent. .TUESDAY...Slight chance of snow showers in the morning, then rain showers, snow showers likely and slight chance of thunderstorms in the afternoon. Snow accumulation up to 1 inch. Highs 37 to 47. Chance of precipitation 60 percent. .TUESDAY NIGHT...Rain and snow showers. Lows 29 to 37. .WEDNESDAY...Rain showers, chance of thunderstorms and snow showers. Highs 48 to 58. .WEDNESDAY NIGHT AND THURSDAY...Mostly cloudy with a 50 percent chance of thunderstorms. Lows 29 to 39. Highs 55 to 65. .THURSDAY NIGHT AND FRIDAY...Mostly cloudy with a 40 percent chance of thunderstorms. Lows 32 to 42. Highs 57 to 67. .FRIDAY NIGHT THROUGH SATURDAY NIGHT...Partly cloudy. Lows 36 to 46. Highs 63 to 73. .SUNDAY...Partly cloudy. Highs 68 to 78. $$ COZ030-032-190300- Jackson County Below 9000 Feet- Grand and Summit Counties Below 9000 Feet- Including Gould, North Park, Rand, Spicer, Walden, Dillon, Fraser, Granby, Grand Lake, Hot Sulphur Springs, and Kremmling 605 AM MDT Mon May 18 2026 .TODAY...Snow showers. Snow accumulation up to 2 inches. Highs 39 to 49. Southeast winds 10 to 15 mph, becoming northwest in the afternoon. .TONIGHT...Mostly cloudy with a 50 percent chance of snow showers. Lows 19 to 29. .TUESDAY...Partly cloudy in the morning, then mostly cloudy with a chance of rain showers, snow showers and slight chance of thunderstorms in the afternoon. Highs 42 to 52. Chance of precipitation 30 percent. .TUESDAY NIGHT...Mostly cloudy with a chance of rain and snow showers. Lows 22 to 30. Chance of precipitation 30 percent. .WEDNESDAY...Partly cloudy with a chance of thunderstorms and slight chance of snow showers. Highs 50 to 58. Chance of snow 30 percent. .WEDNESDAY NIGHT...Partly cloudy. Lows 23 to 29. .THURSDAY...Partly cloudy with a 30 percent chance of thunderstorms. Highs 53 to 61. .THURSDAY NIGHT...Mostly cloudy with a chance of rain showers, snow showers and slight chance of thunderstorms. Lows 26 to 32. Chance of precipitation 30 percent. .FRIDAY...Partly cloudy with a 20 percent chance of thunderstorms. Highs 56 to 62. .FRIDAY NIGHT...Partly cloudy. Lows 28 to 34. .SATURDAY...Mostly sunny. Highs 61 to 67. .SATURDAY NIGHT...Partly cloudy. Lows 31 to 37. .SUNDAY...Mostly sunny. Highs 67 to 73. $$ COZ037-190300- Central and Southeast Park County- Including Fairplay, Hartsel, Lake George, and South Park 605 AM MDT Mon May 18 2026 .TODAY...Snow showers likely, rain showers and chance of thunderstorms. No snow accumulation. Highs 46 to 54. South winds 15 to 25 mph, becoming southwest 20 to 25 mph in the afternoon. Gusts up to 40 mph. .TONIGHT...Partly cloudy. Slight chance of snow showers in the evening. Lows 24 to 30. Chance of snow 10 percent. .TUESDAY...Mostly cloudy. Chance of rain and snow showers in the afternoon. Highs 43 to 53. Southeast winds 10 to 15 mph in the afternoon. Chance of precipitation 50 percent. .TUESDAY NIGHT...Snow showers with rain showers likely. Lows 29 to 35. Southeast winds 10 to 15 mph with gusts up to 25 mph. .WEDNESDAY...Rain showers, chance of thunderstorms and snow showers. Highs 47 to 55. South winds 10 to 15 mph with gusts up to 25 mph. .WEDNESDAY NIGHT...Mostly cloudy with a 40 percent chance of thunderstorms. Lows 29 to 35. .THURSDAY...Partly cloudy with a chance of thunderstorms and slight chance of snow showers. Highs 54 to 62. Chance of snow 30 percent. .THURSDAY NIGHT...Partly cloudy with a slight chance of thunderstorms and snow showers. Lows 30 to 36. Chance of snow 20 percent. .FRIDAY...Partly cloudy with a 20 percent chance of thunderstorms. Highs 57 to 63. .FRIDAY NIGHT THROUGH SATURDAY NIGHT...Partly cloudy. Lows 31 to 40. Highs 61 to 67. .SUNDAY...Mostly sunny. Highs 65 to 71. $$ COZ033-190300- South and East Jackson/Larimer/North and Northeast Grand/ Northwest Boulder Counties Above 9000 Feet- Including Cameron Pass, Laramie and Medicine Bow Mountains, Rabbit Ears Range, Rocky Mountain National Park, and Willow Creek Pass 605 AM MDT Mon May 18 2026 ...WINTER STORM WARNING IN EFFECT UNTIL 9 PM MDT THIS EVENING... .TODAY...Snow showers early in the morning, then snow showers and slight chance of thunderstorms in the late morning and afternoon. New snow accumulation of 6 to 9 inches. Highs 28 to 38. Southeast winds 10 to 15 mph in the morning, becoming light. .TONIGHT...Snow showers likely in the evening, then a chance of snow showers after midnight. Snow accumulation of 1 to 2 inches. Lows 15 to 25. Chance of snow 70 percent. .TUESDAY...Mostly cloudy. Chance of snow showers and slight chance of thunderstorms in the afternoon. Highs 31 to 41. Chance of snow 40 percent. .TUESDAY NIGHT...Mostly cloudy with a 50 percent chance of snow showers. Lows 18 to 28. .WEDNESDAY...Mostly cloudy with a chance of snow showers and thunderstorms. Highs 38 to 48. Chance of snow 40 percent. .WEDNESDAY NIGHT...Partly cloudy. Lows 18 to 28. .THURSDAY...Snow showers likely and chance of thunderstorms. Highs 42 to 52. Chance of snow 60 percent. .THURSDAY NIGHT...Mostly cloudy with a chance of snow showers, rain showers and slight chance of thunderstorms. Lows 22 to 32. Chance of precipitation 50 percent. .FRIDAY...Mostly cloudy with a chance of thunderstorms and snow showers. Highs 45 to 55. Chance of snow 30 percent. .FRIDAY NIGHT...Partly cloudy. Lows 25 to 35. .SATURDAY...Mostly sunny. Highs 51 to 61. .SATURDAY NIGHT...Partly cloudy. Lows 29 to 39. .SUNDAY...Mostly sunny. Highs 56 to 66. $$ COZ031-190300- West Jackson and West Grand Counties Above 9000 Feet- Including Mt Zirkel 605 AM MDT Mon May 18 2026 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 9 PM MDT THIS EVENING... .TODAY...Snow showers. Slight chance of thunderstorms until late afternoon, then a chance of thunderstorms late in the afternoon. New snow accumulation of 4 to 10 inches. Highs 31 to 41. Southeast winds 10 to 15 mph, becoming north in the afternoon. .TONIGHT...Snow showers likely in the evening, then a chance of snow showers after midnight. Snow accumulation up to 1 inch. Lows 16 to 24. Chance of snow 60 percent. .TUESDAY...Partly cloudy in the morning, then mostly cloudy with a chance of snow showers and slight chance of thunderstorms in the afternoon. Highs 36 to 46. Chance of snow 30 percent. .TUESDAY NIGHT...Partly cloudy. Lows 20 to 26. .WEDNESDAY...Partly cloudy with a slight chance of thunderstorms and snow showers. Highs 42 to 52. Chance of snow 10 percent. .WEDNESDAY NIGHT...Mostly clear. Lows 22 to 28. .THURSDAY...Partly cloudy with a chance of thunderstorms and snow showers. Highs 45 to 55. Chance of snow 30 percent. .THURSDAY NIGHT...Partly cloudy with a chance of rain showers, snow showers and slight chance of thunderstorms. Lows 26 to 32. Chance of precipitation 30 percent. .FRIDAY...Partly cloudy with a slight chance of thunderstorms and snow showers. Highs 48 to 58. Chance of snow 20 percent. .FRIDAY NIGHT...Partly cloudy. Lows 28 to 34. .SATURDAY...Mostly sunny. Highs 54 to 64. .SATURDAY NIGHT...Partly cloudy. Lows 32 to 38. .SUNDAY...Mostly sunny. Highs 59 to 69. $$ COZ034-190300- South and Southeast Grand/West Central and Southwest Boulder/ Gilpin/Clear Creek/Summit/North and West Park Counties Above 9000 Feet- Including Berthoud Pass, Breckenridge, East Slopes Mosquito Range, East Slopes Southern Gore Range, Eisenhower Tunnel, Indian Peaks, Kenosha Mountains, Mount Blue Sky, Williams Fork Mountains, and Winter Park 605 AM MDT Mon May 18 2026 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 9 PM MDT THIS EVENING... .TODAY...Snow showers and chance of thunderstorms. New snow accumulation of 4 to 7 inches. Highs 32 to 42. Southeast winds 10 to 20 mph with gusts up to 40 mph, becoming west with gusts up to 30 mph in the afternoon. .TONIGHT...Mostly cloudy with a 50 percent chance of snow showers. Lows 18 to 28. .TUESDAY...Partly cloudy in the morning, then snow showers likely, chanceof rain showers and slight chance of thunderstorms in the afternoon. Snow accumulation up to 2 inches. Highs 34 to 44. Southeast winds 10 to 15 mph in the afternoon. Chance of precipitation 60 percent. .TUESDAY NIGHT...Snow showers. Snow accumulation up to 3 inches possible. Lows 22 to 32. .WEDNESDAY...Snow showers likely, rain showers and chance of thunderstorms. Highs 39 to 49. .WEDNESDAY NIGHT...Partly cloudy with a chance of rain showers, slight chance of thunderstorms and snow showers. Lows 20 to 30. Chance of precipitation 30 percent. .THURSDAY...Partly cloudy with a chance of thunderstorms and snow showers. Highs 43 to 53. Chance of snow 30 percent. .THURSDAY NIGHT...Partly cloudy with a chance of snow showers, rain showers and slight chance of thunderstorms. Lows 22 to 32. Chance of precipitation 30 percent. .FRIDAY...Partly cloudy with a chance of thunderstorms and snow showers. Highs 46 to 56. Chance of snow 30 percent. .FRIDAY NIGHT THROUGH SATURDAY NIGHT...Partly cloudy. Lows 27 to 37. Highs 51 to 61. .SUNDAY...Mostly sunny. Highs 56 to 66. $$