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National Weather Service Forecast Discussion |
National Weather Service Forecast 48 Hour Graphical Forecast Today's Weather Story |
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000 FXUS65 KBOU 260204 AFDBOU Area Forecast Discussion National Weather Service Denver/Boulder CO 804 PM MDT Wed Apr 25 2018 .UPDATE... Issued at 758 PM MDT Wed Apr 25 2018 Cold front will reach the CO-WY border by midnight and then move across the rest of nern CO before 12z. Gusty north winds will occur behind front, however, little pcpn is expected. && .SHORT TERM...(This evening through Thursday) Issued at 303 PM MDT Wed Apr 25 2018 Clear skies and light winds will give way to a fast moving cold front later tonight with gusty winds and a slight chance of showers into Thursday morning. The front is pushing quickly south through Montana this afternoon, and will reach the northern border toward midnight and is still on track to push through Denver 2-3 AM. Gusty north winds will develop behind the front, and continue across the plains through most of Thursday before relaxing. Should see peak gusts of 35 to 45 mph most of this time east of I-25. Then winds gradually drop off late in the day Thursday as gradient and mixing relax. With regard to precipitation chances, there are a few radar echoes beginning to show up across Montana, but low level moisture is quite limited. That said, there is a chance of shallow anticyclonic upslope into the Front Range so with the northerly flow will mention some showers from the Front Range Mountains and Foothills east/southeast across Denver and the Palmer Divide Thursday morning. Don`t think this would be much more than a few sprinkles/flurries given the limited moisture profiles, with perhaps a dusting of snow in the foothills/Palmer Divide. Temperatures will be cooler, but some return of sunshine later in the day should help readings push back into the upper 50s across the plains. .LONG TERM...(Thursday night through Wednesday) Issued at 303 PM MDT Wed Apr 25 2018 Sharp upper level ridge will pop up across the Great Basin Thursday night and then pass across the state Saturday and Saturday night. This will bring warming temperatures through this period. By Saturday, enough moisture is forecast to build under the ridge to bring a chance of afternoon/evening showers and thunderstorms, with the highest (scattered) coverage in/near the mountains. By Sunday, there are signs that a weak ejecting short wave will take most of the moisture with it, and continued downslope will bring even warmer temperatures with highs expected to crack the 80F degree mark on the plains. I`m quite unsure whether or not there would be enough moisture around to bring a chance of afternoon thunderstorms, but this pattern would favor the eastern plains if anyone were to see storms on Sunday. Fire danger may increase in areas that haven`t seen much recent precipitation or green-up, namely Lincoln county. For Monday into Wednesday, models are indicating a deep but slow moving upper level trough to carve out over the southwestern U.S. This pattern would favor a return of cooler and unsettled weather. Until more certainty develops with regard to the exact pattern evolution, we will keep a chance of showers and storms in the forecast through the first half of next week, along with temperatures averaging a little cooler than climatological norms. && .AVIATION...(For the 00Z TAFS through 00Z Thursday evening) Issued at 758 PM MDT Wed Apr 25 2018 Winds were southeast early this evening but should become more southwest by midnight ahead of a cold front. This front should reach DIA around 09z with gusty north winds behind it. Also will see ceilings drops down to the 3500-4000 ft range by 12z. && .BOU WATCHES/WARNINGS/ADVISORIES... None. && $$ UPDATE...RPK SHORT TERM...Barjenbruch LONG TERM...Barjenbruch AVIATION...RPK NWS BOU Office Area Forecast Discussion
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