National Weather Service Forecast Discussion |
Thornton Weather Forecast Today's Forecast Story |
919 FXUS65 KBOU 232039 AFDBOU Area Forecast Discussion National Weather Service Denver/Boulder CO 239 PM MDT Thu Apr 23 2026 .KEY MESSAGES... - Critical fire weather conditions today through the late afternoon today for South Park, portions of the foothills, and plains. - Another round of critical fire weather conditions expected on Friday. - Unsettled pattern by this weekend with chances for precipitation increasing, particularly Sunday afternoon. && .DISCUSSION /Through Thursday/... Issued at 235 PM MDT Thu Apr 23 2026 Current observations show that critical fire weather conditions are in place for most of the foothills, eastern Colorado plains, and South Park, where a Red Flag Warning is still in effect. Periods of 40-50 mph wind gusts were observed this morning, particularly in Boulder County, with a few isolated 60 mph gusts. However, winds have already began to weaken as a shortwave continues to move east increasing upward motion at the mid-levels and limiting wave amplification. Nevertheless, relative humidities will stay in the teens through this afternoon with wind gusts up to 30-45 mph expected. There is high confidence that tomorrow will bring critical fire weather conditions. Temperatures will climb into the upper 60s, with minimum relative humidities dropping into the single digits. However, there is some uncertainty in the eastern extent of widespread gusty winds as they may be more localized in nature. Moderately strong upper-level westerly flow will be in place but winds and the low levels is weak (216- 238>247-249. Red Flag Warning until 7 PM MDT this evening for COZ214-216- 238>251. && $$ DISCUSSION...AA/MAI AVIATION...MV