FPUS55 KBOU 210648 ZFPBOU Zone Forecast Product for Northeast Colorado National Weather Service Denver/Boulder CO 1248 AM MDT Thu May 21 2026 COZ038>040-212100- 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 1248 AM MDT Thu May 21 2026 .REST OF TONIGHT...Partly cloudy. Lows near 40. .THURSDAY...Mostly cloudy. Chance of thunderstorms in the afternoon. Highs 61 to 69. Chance of precipitation 40 percent. .THURSDAY NIGHT...Mostly cloudy. Chance of thunderstorms in the evening, then a chance of showers after midnight. Lows 37 to 43. Chance of rain 40 percent. .FRIDAY...Partly cloudy. Highs in the lower to mid 60s. Northeast winds 10 to 15 mph with gusts up to 30 mph. .FRIDAY NIGHT...Mostly cloudy with a 20 percent chance of showers. Lows 39 to 45. .SATURDAY...Partly cloudy with a 20 percent chance of thunderstorms. Highs near 70. .SATURDAY NIGHT AND SUNDAY...Mostly clear. Lows 42 to 48. Highs near 80. .SUNDAY NIGHT AND MEMORIAL DAY...Partly cloudy with a 20 percent chance of thunderstorms. Lows 47 to 53. Highs in the lower to mid 80s. .MONDAY NIGHT...Mostly cloudy with a 20 percent chance of thunderstorms. Lows in the lower to mid 50s. .TUESDAY...Mostly cloudy with a 40 percent chance of thunderstorms. Highs near 80. .TUESDAY NIGHT...Mostly cloudy with a 50 percent chance of thunderstorms. Lows near 50. .WEDNESDAY...Partly cloudy with a 30 percent chance of thunderstorms. Highs 76 to 82. $$ COZ041-212100- Elbert/Central and East Douglas Counties Above 6000 Feet- Including Castle Rock, Elbert, Fondis, Kiowa, and Larkspur 1248 AM MDT Thu May 21 2026 .REST OF TONIGHT...Mostly cloudy. Slight chance of showers after midnight. Lows in the mid 30s to lower 40s. Chance of rain 20 percent. .THURSDAY...Partly cloudy in the morning, then mostly cloudy with a chance of thunderstorms in the afternoon. Highs in the 60s. South winds 10 to 15 mph in the afternoon. Chance of precipitation 40 percent. .THURSDAY NIGHT...Mostly cloudy. Chance of thunderstorms in the evening, then a chance of showers after midnight. Lows near 40. Chance of rain 40 percent. .FRIDAY...Partly cloudy. Highs near 60. North winds 10 to 15 mph with gusts up to 25 mph. .FRIDAY NIGHT...Mostly cloudy with a chance of showers and slight chance of thunderstorms. Lows near 40. Chance of rain 50 percent. .SATURDAY...Mostly cloudy with a 50 percent chance of thunderstorms. Highs in the 60s. .SATURDAY NIGHT AND SUNDAY...Mostly clear. Lows in the lower to mid 40s. Highs 73 to 79. .SUNDAY NIGHT...Partly cloudy. Lows 46 to 52. .MEMORIAL DAY...Partly cloudy with a 20 percent chance of thunderstorms. Highs 76 to 82. .MONDAY NIGHT AND TUESDAY...Mostly cloudy with a 20 percent chance of thunderstorms. Lows 47 to 53. Highs 72 to 78. .TUESDAY NIGHT...Mostly cloudy. Lows 45 to 51. .WEDNESDAY...Partly cloudy with a 20 percent chance of thunderstorms. Highs in the 70s. $$ COZ042>045-212100- Northeast Weld County-Central and South Weld 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 1248 AM MDT Thu May 21 2026 .REST OF TONIGHT...Partly cloudy. Lows in the mid 30s to lower 40s. .THURSDAY...Mostly cloudy. Chance of thunderstorms in the afternoon. Highs in the mid to upper 60s. Southeast winds 10 to 15 mph with gusts up to 25 mph. Chance of precipitation 50 percent. .THURSDAY NIGHT...Showers likely and chance of thunderstorms in the evening, then a chance of showers and slight chance of thunderstorms after midnight. Lows near 40. East winds 10 to 15 mph with gusts up to 20 mph, becoming north with gusts up to 30 mph after midnight. Chance of rain 70 percent. .FRIDAY...Mostly sunny. Highs in the lower to mid 60s. North winds 10 to 20 mph with gusts up to 30 mph. .FRIDAY NIGHT...Mostly cloudy with a 20 percent chance of showers. Lows near 40. .SATURDAY...Partly cloudy with a 20 percent chance of thunderstorms. Highs near 70. .SATURDAY NIGHT AND SUNDAY...Mostly clear. Lows in the lower to mid 40s. Highs in the lower to mid 80s. .SUNDAY NIGHT...Mostly clear. Lows 46 to 52. .MEMORIAL DAY...Mostly sunny with a 20 percent chance of thunderstorms. Highs in the mid to upper 80s. .MONDAY NIGHT AND TUESDAY...Partly cloudy with a 20 percent chance of thunderstorms. Windy. Lows near 50. Highs in the lower to mid 80s. .TUESDAY NIGHT...Mostly cloudy with a 40 percent chance of thunderstorms. Lows near 50. .WEDNESDAY...Partly cloudy with a 20 percent chance of thunderstorms. Highs near 80. $$ COZ046-047-212100- North and Northeast Elbert County Below 6000 Feet/North Lincoln County- Southeast Elbert County Below 6000 Feet/South Lincoln County- Including Agate, Hugo, Limon, Matheson, Forder, Karval, Kutch, and Punkin Center 1248 AM MDT Thu May 21 2026 .REST OF TONIGHT...Mostly cloudy. Chance of showers after midnight, then a slight chance of showers towards sunrise. Lows near 40. Southeast winds 10 to 15 mph with gusts up to 20 mph. Chance of rain 30 percent. .THURSDAY...Mostly cloudy. Slight chance of showers in the morning, then a chance of thunderstorms in the afternoon. Some thunderstorms may be severe. Highs in the mid to upper 60s. Southeast winds 10 to 20 mph in the afternoon. Chance of rain 30 percent. .THURSDAY NIGHT...Showers likely and chance of thunderstorms in the evening, then showers likely and slight chance of thunderstorms after midnight. Lows 36 to 42. Southeast winds 10 to 15 mph, becoming north after midnight. Chance of rain 70 percent. .FRIDAY...Mostly sunny. Highs 59 to 65. North winds 20 to 25 mph with gusts up to 35 mph. .FRIDAY NIGHT...Mostly cloudy with a 20 percent chance of rain showers. Lows 36 to 42. .SATURDAY...Mostly cloudy with a 40 percent chance of thunderstorms. Highs in the mid 60s to lower 70s. .SATURDAY NIGHT...Mostly clear. Lows 38 to 44. .SUNDAY...Sunny. Highs near 80. .SUNDAY NIGHT AND MEMORIAL DAY...Mostly clear. Lows 44 to 50. Highs in the lower to mid 80s. .MONDAY NIGHT AND TUESDAY...Partly cloudy with a 20 percent chance of thunderstorms. Windy. Lows 45 to 51. Highs near 80. .TUESDAY NIGHT...Mostly cloudy. Lows 44 to 50. .WEDNESDAY...Partly cloudy. Highs near 80. $$ COZ048>051-212100- 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 1248 AM MDT Thu May 21 2026 .REST OF TONIGHT...Mostly cloudy. Lows in the upper 30s. South winds 10 to 15 mph with gusts up to 20 mph. .THURSDAY...Mostly cloudy. Slight chance of showers in the morning, then a chance of thunderstorms in the afternoon. Some thunderstorms may be severe. Highs 57 to 65. Southeast winds 15 to 25 mph with gusts up to 30 mph. Chance of rain 30 percent. .THURSDAY NIGHT...Showers and chance of thunderstorms in the evening, then showers likely and slight chance of thunderstorms after midnight. Lows in the lower 40s. East winds 10 to 15 mph, becoming northwest after midnight. .FRIDAY...Mostly sunny. Highs in the lower 60s. Northwest winds 15 to 25 mph with gusts up to 35 mph. .FRIDAY NIGHT...Mostly cloudy with a 20 percent chance of showers. Lows around 40. .SATURDAY...Mostly cloudy with a chance of showers and slight chance of thunderstorms. Highs near 70. Chance of rain 40 percent. .SATURDAY NIGHT...Mostly clear. Lows in the mid 40s. .SUNDAY...Sunny, warmer. Highs 80 to 86. .SUNDAY NIGHT AND MEMORIAL DAY...Mostly clear. Lows in the upper 40s. Highs in the mid to upper 80s. .MONDAY NIGHT...Partly cloudy with a 20 percent chance of thunderstorms. Lows in the lower 50s. .TUESDAY...Partly cloudy. Very windy. Highs in the lower to mid 80s. .TUESDAY NIGHT...Mostly cloudy with a 20 percent chance of thunderstorms. Lows around 50. .WEDNESDAY...Mostly cloudy with a 10 percent chance of thunderstorms. Highs near 80. $$ COZ035-212100- Larimer and Boulder Counties Between 6000 and 9000 Feet- Including Estes Park, Glendevey, Nederland, and Red Feather Lakes 1248 AM MDT Thu May 21 2026 .REST OF TONIGHT...Partly cloudy. Lows 27 to 37. .THURSDAY...Mostly cloudy. Slight chance of rain showers in the morning, then a chance of thunderstorms in the afternoon. Highs 52 to 60. Chance of rain 50 percent. .THURSDAY NIGHT...Rain showers likely, chance of thunderstorms and snow showers likely in the evening, then a chance of rain and snow showers after midnight. Little or no snow accumulation. Lows 29 to 39. Chance of precipitation 70 percent. .FRIDAY...Partly cloudy. Highs 50 to 60. .FRIDAY NIGHT...Mostly cloudy with a slight chance of rain and snow showers. Lows 31 to 41. Chance of precipitation 20 percent. .SATURDAY...Partly cloudy with a chance of rain showers and slight chance of thunderstorms. Highs 56 to 66. Chance of rain 30 percent. .SATURDAY NIGHT AND SUNDAY...Mostly clear. Lows 35 to 45. Highs 67 to 77. .SUNDAY NIGHT...Partly cloudy with a 20 percent chance of thunderstorms. Lows 41 to 51. .MEMORIAL DAY...Partly cloudy with a 40 percent chance of thunderstorms. Highs 69 to 79. .MONDAY NIGHT...Mostly cloudy with a 20 percent chance of thunderstorms. Lows 43 to 53. .TUESDAY...Showers and chance of thunderstorms. Highs 64 to 74. .TUESDAY NIGHT...Mostly cloudy with a 50 percent chance of thunderstorms. Lows 41 to 51. .WEDNESDAY...Mostly cloudy with a 40 percent chance of thunderstorms. Highs 64 to 74. $$ COZ036-212100- 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 1248 AM MDT Thu May 21 2026 .REST OF TONIGHT...Partly cloudy. Slight chance of rain showers after midnight. Lows 29 to 39. Chance of rain 10 percent. .THURSDAY...Partly cloudy in the morning, then mostly cloudy with a chance of thunderstorms in the afternoon. Highs 56 to 66. Chance of precipitation 40 percent. .THURSDAY NIGHT...Mostly cloudy with a chance of rain showers and slight chance of thunderstorms in the evening, then partly cloudy with a slight chance of rain and snow showers after midnight. Lows 31 to 41. Chance of precipitation 30 percent. .FRIDAY...Partly cloudy with a chance of rain showers and slight chance of thunderstorms. Highs 51 to 61. Chance of rain 30 percent. .FRIDAY NIGHT...Mostly cloudy with a chance of rain showers and slight chance of thunderstorms. Lows 34 to 44. Chance of rain 50 percent. .SATURDAY...Mostly cloudy with a 50 percent chance of thunderstorms. Highs 57 to 67. .SATURDAY NIGHT...Mostly clear. Lows 35 to 45. .SUNDAY AND SUNDAY NIGHT...Partly cloudy with a 20 percent chance of thunderstorms. Highs 67 to 77. Lows 40 to 50. .MEMORIAL DAY...Partly cloudy with a 50 percent chance of thunderstorms. Highs 70 to 80. .MONDAY NIGHT...Mostly cloudy with a chance of showers and slight chance of thunderstorms. Lows 42 to 52. Chance of rain 30 percent. .TUESDAY...Mostly cloudy with a 40 percent chance of thunderstorms. Highs 66 to 76. .TUESDAY NIGHT...Mostly cloudy with a 30 percent chance of thunderstorms. Lows 40 to 50. .WEDNESDAY...Partly cloudy with a 40 percent chance of thunderstorms. Highs 67 to 77. $$ COZ030-032-212100- Jackson County Below 9000 Feet- Grand and Summit Counties Below 9000 Feet- Including Gould, North Park, Rand, Spicer, Walden, Dillon, Fraser, Granby, Grand Lake, Hot Sulphur Springs, and Kremmling 1248 AM MDT Thu May 21 2026 .REST OF TONIGHT...Mostly clear. Lows 23 to 29. .THURSDAY...Mostly cloudy. Slight chance of rain and snow showers in the morning, then a chance of thunderstorms in the afternoon. Highs 52 to 60. West winds 10 to 20 mph in the afternoon. Gusts up to 30 mph. Chance of precipitation 50 percent. .THURSDAY NIGHT...Rain showers, snow showers likely and slight chance of thunderstorms in the evening, then a chance of rain and snow showers after midnight. Snow accumulation up to 1 inch. Lows 26 to 32. Chance of precipitation 60 percent. .FRIDAY...Partly cloudy. Highs 50 to 58. .FRIDAY NIGHT...Mostly cloudy with a slight chance of rain and snow showers. Lows 25 to 33. Chance of precipitation 20 percent. .SATURDAY...Partly cloudy with a slight chance of thunderstorms and snow showers. Highs 56 to 62. Chance of snow 20 percent. .SATURDAY NIGHT THROUGH SUNDAY NIGHT...Mostly clear. Lows 29 to 39. Highs 65 to 71. .MEMORIAL DAY...Partly cloudy with a 20 percent chance of thunderstorms. Highs 69 to 75. .MONDAY NIGHT...Mostly cloudy with a 20 percent chance of thunderstorms. Lows 35 to 41. .TUESDAY...Showers likely and chance of thunderstorms. Highs 64 to 70. Chance of rain 70 percent. .TUESDAY NIGHT...Mostly cloudy with a chance of rain showers and slight chance of thunderstorms. Lows 33 to 39. Chance of rain 40 percent. .WEDNESDAY...Partly cloudy with a 30 percent chance of thunderstorms. Highs 67 to 73. $$ COZ037-212100- Central and Southeast Park County- Including Fairplay, Hartsel, Lake George, and South Park 1248 AM MDT Thu May 21 2026 .REST OF TONIGHT...Mostly cloudy. Slight chance of rain showers after midnight. Lows 28 to 34. Chance of rain 10 percent. .THURSDAY...Partly cloudy. Slight chance of thunderstorms in the afternoon. Highs 54 to 62. Southwest winds 15 to 25 mph with gusts up to 35 mph in the afternoon. Chance of precipitation 20 percent. .THURSDAY NIGHT...Mostly clear. Lows 28 to 34. West winds 10 to 15 mph with gusts up to 35 mph in the evening, becoming light. .FRIDAY...Partly cloudy with a 10 percent chance of thunderstorms. Highs 55 to 61. .FRIDAY NIGHT...Rain showers likely, chance of snow showers and slight chance of thunderstorms. Lows 33 to 39. Chance of precipitation 70 percent. .SATURDAY...Partly cloudy with a chance of rain showers and slight chance of thunderstorms. Highs 56 to 64. Chance of rain 30 percent. .SATURDAY NIGHT AND SUNDAY...Mostly clear. Lows 32 to 38. Highs 63 to 71. .SUNDAY NIGHT...Partly cloudy with a 20 percent chance of thunderstorms. Lows 37 to 43. .MEMORIAL DAY...Partly cloudy with a 40 percent chance of thunderstorms. Highs 66 to 72. .MONDAY NIGHT...Mostly cloudy with a 20 percent chance of thunderstorms. Lows 38 to 44. .TUESDAY...Mostly cloudy with a 50 percent chance of thunderstorms. Highs 60 to 66. .TUESDAY NIGHT...Mostly cloudy with a 30 percent chance of thunderstorms. Lows 36 to 42. .WEDNESDAY...Partly cloudy with a 20 percent chance of thunderstorms. Highs 64 to 70. $$ COZ031-033-212100- West Jackson and West Grand Counties Above 9000 Feet- South and East Jackson/Larimer/North and Northeast Grand/ Northwest Boulder Counties Above 9000 Feet- Including Mt Zirkel, Cameron Pass, Laramie and Medicine Bow Mountains, Rabbit Ears Range, Rocky Mountain National Park, and Willow Creek Pass 1248 AM MDT Thu May 21 2026 .REST OF TONIGHT...Mostly clear. Lows 19 to 29. .THURSDAY...Mostly cloudy. Slight chance of snow showers in the morning, then a chance of thunderstorms and snow showers in the afternoon. Highs 42 to 52. West winds 10 to 15 mph in the afternoon. Chance of snow 50 percent. .THURSDAY NIGHT...Snow showers, rain showers likely and slight chance of thunderstorms in the evening, then a chance of snow showers after midnight. Snow accumulation around 1 inch. Lows 23 to 31. Chance of precipitation 70 percent. .FRIDAY...Partly cloudy. Highs 40 to 50. .FRIDAY NIGHT...Mostly cloudy with a 20 percent chance of snow showers. Lows 23 to 31. .SATURDAY...Partly cloudy with a slight chance of thunderstorms and snow showers. Highs 46 to 56. Chance of snow 20 percent. .SATURDAY NIGHT AND SUNDAY...Mostly clear. Lows 27 to 35. Highs 55 to 65. .SUNDAY NIGHT...Mostly clear. Lows 33 to 41. .MEMORIAL DAY...Partly cloudy with a 30 percent chance of thunderstorms. Highs 59 to 69. .MONDAY NIGHT...Partly cloudy with a 20 percent chance of thunderstorms. Lows 34 to 44. .TUESDAY...Rain showers likely and chance of thunderstorms. Highs 55 to 65. Chance of rain 70 percent. .TUESDAY NIGHT...Mostly cloudy with a chance of rain showers and slight chance of thunderstorms. Lows 33 to 41. Chance of rain 50 percent. .WEDNESDAY...Partly cloudy with a 30 percent chance of thunderstorms. Highs 57 to 67. $$ COZ034-212100- 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 1248 AM MDT Thu May 21 2026 .REST OF TONIGHT...Mostly clear. Lows 19 to 29. .THURSDAY...Partly cloudy in the morning, then mostly cloudy with a chance of snow showers, rain showers and slight chance of thunderstorms in the afternoon. Highs 43 to 53. West winds 10 to 15 mph in the afternoon. Chance of precipitation 30 percent. .THURSDAY NIGHT...Chance of rain showers and slight chance of thunderstorms in the evening. Mostly cloudy with a chance of snow showers. Lows 22 to 32. West winds 10 to 15 mph with gusts up to 30 mph in the evening, becoming light. Chance of precipitation 50 percent. .FRIDAY...Partly cloudy. Highs 43 to 53. West winds 10 to 15 mph with gusts up to 25 mph. .FRIDAY NIGHT...Mostly cloudy with a chance of snow showers, rain showers and slight chance of thunderstorms. Lows 25 to 35. Chance of precipitation 50 percent. .SATURDAY...Partly cloudy with a chance of rain showers, slight chance of thunderstorms and snow showers. Highs 46 to 56. Chance of precipitation 40 percent. .SATURDAY NIGHT AND SUNDAY...Mostly clear. Lows 26 to 36. Highs 54 to 64. .SUNDAY NIGHT...Partly cloudy with a 20 percent chance of thunderstorms. Lows 31 to 41. .MEMORIAL DAY...Rain showers likely and chance of thunderstorms. Highs 58 to 68. Chance of rain 60 percent. .MONDAY NIGHT...Mostly cloudy with a chance of rain showers and slight chance of thunderstorms. Lows 33 to 43. Chance of rain 30 percent. .TUESDAY...Rain showers, snow showers likely and chance of thunderstorms. Highs 53 to 63. Chance of precipitation 70 percent. .TUESDAY NIGHT...Mostly cloudy with a 50 percent chance of thunderstorms. Lows 31 to 41. .WEDNESDAY...Partly cloudy with a chance of thunderstorms and snow showers. Highs 56 to 66. Chance of snow 30 percent. $$