Zone Forecast Product
Issued by NWS Denver/Boulder, CO
Issued by NWS Denver/Boulder, CO
689 FPUS55 KBOU 180649 ZFPBOU Zone Forecast Product for Northeast Colorado National Weather Service Denver/Boulder CO 1248 AM MDT Tue Aug 18 2026 COZ038>040-182100- 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 Tue Aug 18 2026 .REST OF TONIGHT...Mostly clear. Lows 57 to 63. .TUESDAY...Partly cloudy in the morning, then mostly cloudy with a chance of thunderstorms in the afternoon. Highs 85 to 93. Northeast winds 10 to 15 mph with gusts up to 20 mph in the afternoon. Chance of precipitation 30 percent. .TUESDAY NIGHT...Mostly cloudy with a chance of thunderstorms in the evening, then partly cloudy with a slight chance of showers after midnight. Lows 55 to 63. Chance of rain 40 percent. .WEDNESDAY...Partly cloudy with a 20 percent chance of thunderstorms. Highs 84 to 90. .WEDNESDAY NIGHT...Mostly clear. Lows 54 to 62. .THURSDAY AND THURSDAY NIGHT...Mostly clear. Highs in the lower to mid 90s. Lows 58 to 64. .FRIDAY AND FRIDAY NIGHT...Partly cloudy. Highs 90 to 96. Lows 58 to 66. .SATURDAY...Partly cloudy with a 30 percent chance of thunderstorms. Highs 89 to 95. .SATURDAY NIGHT...Mostly cloudy with a 30 percent chance of thunderstorms. Lows 59 to 65. .SUNDAY...Showers likely and chance of thunderstorms. Highs near 90. Chance of rain 70 percent. .SUNDAY NIGHT...Mostly cloudy with a 40 percent chance of thunderstorms. Lows 57 to 63. .MONDAY...Mostly cloudy with a 50 percent chance of thunderstorms. Highs near 90. $$ COZ041-182100- Elbert/Central and East Douglas Counties Above 6000 Feet- Including Castle Rock, Elbert, Fondis, Kiowa, and Larkspur 1248 AM MDT Tue Aug 18 2026 .REST OF TONIGHT...Partly cloudy. Lows near 60. .TUESDAY...Partly cloudy. Slight chance of thunderstorms in the afternoon. Highs near 90. Chance of precipitation 20 percent. .TUESDAY NIGHT...Mostly cloudy with a slight chance of thunderstorms in the evening, then partly cloudy with a slight chance of showers after midnight. Lows in the mid to upper 50s. Chance of rain 20 percent. .WEDNESDAY...Partly cloudy with a 50 percent chance of thunderstorms. Highs in the 80s. .WEDNESDAY NIGHT...Partly cloudy with a 20 percent chance of thunderstorms. Lows in the mid to upper 50s. South winds 10 to 15 mph with gusts up to 20 mph. .THURSDAY AND THURSDAY NIGHT...Mostly clear. Highs near 90. Lows near 60. .FRIDAY AND FRIDAY NIGHT...Partly cloudy with a 10 percent chance of thunderstorms. Highs 88 to 94. Lows near 60. .SATURDAY...Partly cloudy with a 30 percent chance of thunderstorms. Highs 87 to 93. .SATURDAY NIGHT...Mostly cloudy with a 40 percent chance of thunderstorms. Lows near 60. .SUNDAY...Mostly cloudy with a 50 percent chance of thunderstorms. Highs 86 to 92. .SUNDAY NIGHT...Mostly cloudy with a 40 percent chance of thunderstorms. Lows in the mid 50s to lower 60s. .MONDAY...Partly cloudy with a 40 percent chance of thunderstorms. Highs 84 to 90. $$ COZ042>045-182100- 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 Tue Aug 18 2026 .REST OF TONIGHT...Mostly clear. Lows 56 to 62. .TUESDAY...Partly cloudy. Slight chance of thunderstorms in the afternoon. Highs 86 to 92. Northeast winds 10 to 15 mph with gusts up to 20 mph in the afternoon. Chance of precipitation 20 percent. .TUESDAY NIGHT...Mostly cloudy with a chance of thunderstorms in the evening, then partly cloudy with a chance of showers after midnight. Lows near 60. Northeast winds 10 to 15 mph with gusts up to 20 mph in the evening, becoming light. Chance of rain 40 percent. .WEDNESDAY...Partly cloudy. Highs in the mid 80s to lower 90s. .WEDNESDAY NIGHT...Mostly clear. Lows near 60. .THURSDAY THROUGH FRIDAY...Mostly clear. Highs 90 to 97. Lows near 60. .FRIDAY NIGHT...Partly cloudy with a 20 percent chance of thunderstorms. Lows in the lower to mid 60s. .SATURDAY...Partly cloudy with a 10 percent chance of thunderstorms. Highs in the lower to mid 90s. .SATURDAY NIGHT...Mostly cloudy with a 30 percent chance of thunderstorms. Lows in the lower to mid 60s. .SUNDAY...Partly cloudy with a 30 percent chance of thunderstorms. Highs in the lower to mid 90s. .SUNDAY NIGHT...Mostly cloudy with a 40 percent chance of thunderstorms. Lows near 60. .MONDAY...Partly cloudy with a 30 percent chance of thunderstorms. Highs near 90. $$ COZ046-047-182100- North and Northeast Elbert County Below 6000 Feet/North Lincoln County- Southeast Elbert County Below 6000 Feet/South Lincoln County- Including Agate, Hugo, Limon, Matheson, Forder, Karval, Kutch, and Punkin Center 1248 AM MDT Tue Aug 18 2026 .REST OF TONIGHT...Mostly clear. Lows near 60. .TUESDAY...Mostly sunny. Highs 90 to 96. North winds 10 to 15 mph with gusts up to 20 mph. .TUESDAY NIGHT...Mostly cloudy. Chance of thunderstorms in the evening, then a chance of showers after midnight. Lows near 60. Northeast winds 10 to 15 mph in the evening, becoming light. Chance of rain 40 percent. .WEDNESDAY...Partly cloudy with a 30 percent chance of thunderstorms. Highs in the mid 80s. .WEDNESDAY NIGHT...Partly cloudy with a 30 percent chance of thunderstorms. Lows in the mid 50s to lower 60s. .THURSDAY THROUGH FRIDAY...Mostly clear. Highs in the lower to mid 90s. Lows near 60. .FRIDAY NIGHT...Partly cloudy with a 20 percent chance of thunderstorms. Lows near 60. .SATURDAY...Mostly sunny. Highs in the lower to mid 90s. .SATURDAY NIGHT AND SUNDAY...Partly cloudy with a 20 percent chance of thunderstorms. Lows near 60. Highs in the lower to mid 90s. .SUNDAY NIGHT...Mostly cloudy with a 40 percent chance of thunderstorms. Lows near 60. .MONDAY...Partly cloudy with a 20 percent chance of thunderstorms. Highs near 90. $$ COZ048>051-182100- 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 Tue Aug 18 2026 .REST OF TONIGHT...Mostly clear. Lows in the lower 60s. .TUESDAY...Partly cloudy. Slight chance of thunderstorms in the afternoon. Highs 85 to 91. North winds 10 to 15 mph. Chance of precipitation 20 percent. .TUESDAY NIGHT...Mostly cloudy. Chance of thunderstorms in the evening, then a chance of showers after midnight. Lows around 60. Northeast winds 10 to 15 mph with gusts up to 20 mph in the evening, becoming light. Chance of rain 40 percent. .WEDNESDAY...Partly cloudy with a 20 percent chance of showers. Highs in the 80s. .WEDNESDAY NIGHT...Partly cloudy with a 20 percent chance of thunderstorms. Lows around 60. .THURSDAY THROUGH FRIDAY...Mostly clear. Highs 88 to 95. Lows in the lower 60s. .FRIDAY NIGHT...Partly cloudy with a 20 percent chance of thunderstorms. Lows in the lower 60s. .SATURDAY...Mostly sunny. Highs in the lower to mid 90s. .SATURDAY NIGHT...Mostly cloudy with a 30 percent chance of thunderstorms. Lows in the lower 60s. .SUNDAY...Partly cloudy with a 20 percent chance of thunderstorms. Highs in the lower to mid 90s. .SUNDAY NIGHT...Mostly cloudy with a 40 percent chance of thunderstorms. Lows in the lower 60s. .MONDAY...Partly cloudy with a 20 percent chance of thunderstorms. Highs near 90. $$ COZ035-182100- Larimer and Boulder Counties Between 6000 and 9000 Feet- Including Estes Park, Glendevey, Nederland, and Red Feather Lakes 1248 AM MDT Tue Aug 18 2026 .REST OF TONIGHT...Partly cloudy. Lows 51 to 61. .TUESDAY...Partly cloudy in the morning, then mostly cloudy with a chance of thunderstorms in the afternoon. Highs 75 to 85. Chance of precipitation 40 percent. .TUESDAY NIGHT...Mostly cloudy with a chance of thunderstorms in the evening, then partly cloudy after midnight. Lows 48 to 58. Chance of precipitation 40 percent. .WEDNESDAY...Partly cloudy with a 20 percent chance of thunderstorms. Highs 74 to 84. .WEDNESDAY NIGHT...Mostly clear. Lows 48 to 58. .THURSDAY...Mostly sunny. Highs 79 to 89. .THURSDAY NIGHT...Partly cloudy. Lows 51 to 61. .FRIDAY...Partly cloudy with a 20 percent chance of thunderstorms. Highs 79 to 89. .FRIDAY NIGHT...Partly cloudy. Lows 52 to 62. .SATURDAY...Showers likely and chance of thunderstorms. Highs 77 to 87. Chance of rain 60 percent. .SATURDAY NIGHT...Mostly cloudy with a 30 percent chance of thunderstorms. Lows 52 to 62. .SUNDAY...Showers likely and chance of thunderstorms. Highs 76 to 86. Chance of rain 70 percent. .SUNDAY NIGHT...Mostly cloudy with a 40 percent chance of thunderstorms. Lows 49 to 59. .MONDAY...Showers and chance of thunderstorms. Highs 74 to 84. $$ COZ036-182100- 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 Tue Aug 18 2026 .REST OF TONIGHT...Partly cloudy. Lows 52 to 60. .TUESDAY...Partly cloudy in the morning, then mostly cloudy with a slight chance of thunderstorms in the afternoon. Highs 78 to 88. Chance of precipitation 20 percent. .TUESDAY NIGHT...Mostly cloudy with a chance of thunderstorms in the evening, then partly cloudy after midnight. Lows 51 to 59. Chance of precipitation 30 percent. .WEDNESDAY...Partly cloudy with a 40 percent chance of thunderstorms. Highs 75 to 85. .WEDNESDAY NIGHT...Partly cloudy with a 20 percent chance of showers. Lows 51 to 59. .THURSDAY...Mostly sunny with a 10 percent chance of thunderstorms. Highs 79 to 89. .THURSDAY NIGHT...Partly cloudy. Lows 53 to 61. .FRIDAY...Partly cloudy with a 40 percent chance of thunderstorms. Highs 80 to 90. .FRIDAY NIGHT...Partly cloudy with a 20 percent chance of thunderstorms. Lows 52 to 62. .SATURDAY...Showers likely and chance of thunderstorms. Highs 79 to 89. Chance of rain 60 percent. .SATURDAY NIGHT...Mostly cloudy with a 30 percent chance of thunderstorms. Lows 52 to 62. .SUNDAY...Showers with thunderstorms likely. Highs 77 to 87. .SUNDAY NIGHT...Mostly cloudy with a 50 percent chance of thunderstorms. Lows 50 to 60. .MONDAY...Showers with thunderstorms likely. Highs 76 to 86. $$ COZ030-032-182100- Jackson County Below 9000 Feet- Grand and Summit Counties Below 9000 Feet- Including Gould, North Park, Rand, Spicer, Walden, Dillon, Fraser, Granby, Grand Lake, Hot Sulphur Springs, and Kremmling 1248 AM MDT Tue Aug 18 2026 .REST OF TONIGHT...Mostly clear. Lows 39 to 49. .TUESDAY...Partly cloudy in the morning, then mostly cloudy with a slight chance of thunderstorms in the afternoon. Highs 75 to 81. West winds 10 to 15 mph in the afternoon. Chance of precipitation 20 percent. .TUESDAY NIGHT...Mostly cloudy in the evening, then becoming partly cloudy. Slight chance of thunderstorms in the evening. Chance of showers. Lows 40 to 50. Chance of rain 30 percent. .WEDNESDAY...Partly cloudy. Highs 73 to 81. .WEDNESDAY NIGHT...Mostly clear. Lows 39 to 49. .THURSDAY...Mostly sunny. Highs 79 to 85. .THURSDAY NIGHT THROUGH FRIDAY NIGHT...Partly cloudy. Lows 42 to 52. Highs 80 to 86. .SATURDAY...Partly cloudy with a 40 percent chance of thunderstorms. Highs 77 to 83. .SATURDAY NIGHT...Mostly cloudy with a 40 percent chance of thunderstorms. Lows 42 to 50. .SUNDAY...Thunderstorms likely. Highs 75 to 81. Chance of precipitation 60 percent. .SUNDAY NIGHT...Mostly cloudy with a 40 percent chance of thunderstorms. Lows 40 to 50. .MONDAY...Showers likely and chance of thunderstorms. Highs 74 to 80. Chance of rain 60 percent. $$ COZ037-182100- Central and Southeast Park County- Including Fairplay, Hartsel, Lake George, and South Park 1248 AM MDT Tue Aug 18 2026 .REST OF TONIGHT...Partly cloudy. Lows 44 to 52. .TUESDAY...Partly cloudy in the morning, then mostly cloudy with a slight chance of thunderstorms in the afternoon. Highs 75 to 83. West winds 10 to 15 mph in the afternoon. Chance of precipitation 20 percent. .TUESDAY NIGHT...Mostly cloudy with a chance of thunderstorms in the evening, then partly cloudy after midnight. Lows 45 to 51. Chance of precipitation 30 percent. .WEDNESDAY...Partly cloudy with a 40 percent chance of thunderstorms. Highs 74 to 80. .WEDNESDAY NIGHT...Partly cloudy with a 20 percent chance of thunderstorms. Lows 45 to 51. .THURSDAY...Partly cloudy with a 30 percent chance of thunderstorms. Highs 75 to 83. .THURSDAY NIGHT...Partly cloudy with a 20 percent chance of thunderstorms. Lows 46 to 52. .FRIDAY...Partly cloudy with a 40 percent chance of thunderstorms. Highs 75 to 83. .FRIDAY NIGHT...Mostly cloudy with a chance of showers and slight chance of thunderstorms. Lows 46 to 52. Chance of rain 30 percent. .SATURDAY...Showers likely and chance of thunderstorms. Highs 74 to 82. Chance of rain 60 percent. .SATURDAY NIGHT...Mostly cloudy with a 40 percent chance of thunderstorms. Lows 46 to 52. .SUNDAY...Thunderstorms likely. Highs 73 to 81. Chance of precipitation 70 percent. .SUNDAY NIGHT...Mostly cloudy with a 50 percent chance of thunderstorms. Lows 45 to 51. .MONDAY...Thunderstorms likely. Highs 72 to 80. Chance of precipitation 70 percent. $$ COZ031-033-182100- West Jackson and West Grand Counties Above 9000 Feet- South and East Jackson/Larimer/North and Northeast Grand/ Northwest Boulder Counties Above 9000 Feet- Including Mt Zirkel, Cameron Pass, Laramie and Medicine Bow Mountains, Rabbit Ears Range, Rocky Mountain National Park, and Willow Creek Pass 1248 AM MDT Tue Aug 18 2026 .REST OF TONIGHT...Mostly clear. Lows 43 to 53. .TUESDAY...Partly cloudy in the morning, then mostly cloudy with a chance of thunderstorms in the afternoon. Highs 65 to 75. West winds 10 to 15 mph in the afternoon. Chance of precipitation 30 percent. .TUESDAY NIGHT...Mostly cloudy with a chance of showers and slight chance of thunderstorms in the evening, then partly cloudy with a slight chance of showers after midnight. Lows 41 to 51. Chance of rain 40 percent. .WEDNESDAY...Partly cloudy with a 20 percent chance of thunderstorms. Highs 64 to 74. West winds 10 to 15 mph with gusts up to 30 mph. .WEDNESDAY NIGHT...Mostly clear. Lows 42 to 52. .THURSDAY...Mostly sunny. Highs 68 to 78. .THURSDAY NIGHT...Partly cloudy. Lows 43 to 53. .FRIDAY...Partly cloudy with a 20 percent chance of thunderstorms. Highs 70 to 80. .FRIDAY NIGHT...Partly cloudy. Lows 44 to 54. .SATURDAY AND SATURDAY NIGHT...Mostly cloudy with a 40 percent chance of thunderstorms. Highs 67 to 77. Lows 43 to 53. .SUNDAY...Thunderstorms likely. Highs 65 to 75. Chance of precipitation 70 percent. .SUNDAY NIGHT...Mostly cloudy with a 50 percent chance of thunderstorms. Lows 42 to 52. .MONDAY...Showers likely and chance of thunderstorms. Highs 64 to 74. Chance of rain 60 percent. $$ COZ034-182100- 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 Tue Aug 18 2026 .REST OF TONIGHT...Mostly clear. Lows 42 to 52. .TUESDAY...Partly cloudy in the morning, then mostly cloudy with a slight chance of thunderstorms in the afternoon. Highs 65 to 75. West winds 10 to 15 mph in the afternoon. Chance of precipitation 20 percent. .TUESDAY NIGHT...Mostly cloudy with a chance of thunderstorms in the evening, then partly cloudy after midnight. Lows 41 to 51. Chance of precipitation 30 percent. .WEDNESDAY...Partly cloudy with a 20 percent chance of thunderstorms. Highs 62 to 72. Northwest winds 10 to 15 mph with gusts up to 30 mph. .WEDNESDAY NIGHT...Partly cloudy. Lows 41 to 51. .THURSDAY...Mostly sunny with a 30 percent chance of thunderstorms. Highs 66 to 76. .THURSDAY NIGHT...Partly cloudy with a 20 percent chance of showers. Lows 42 to 52. .FRIDAY...Partly cloudy with a 50 percent chance of thunderstorms. Highs 67 to 77. .FRIDAY NIGHT...Mostly cloudy with a 20 percent chance of thunderstorms. Lows 43 to 53. .SATURDAY...Showers likely and chance of thunderstorms. Highs 65 to 75. Chance of rain 70 percent. .SATURDAY NIGHT...Mostly cloudy with a 40 percent chance of thunderstorms. Lows 42 to 52. .SUNDAY...Thunderstorms likely. Highs 63 to 73. Chance of precipitation 70 percent. .SUNDAY NIGHT...Mostly cloudy with a 50 percent chance of thunderstorms. Lows 41 to 51. .MONDAY...Thunderstorms likely. Highs 62 to 72. Chance of precipitation 70 percent. $$