Area Forecast Discussion
Issued by NWS Denver/Boulder, CO
Issued by NWS Denver/Boulder, CO
Versions:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
074 FXUS65 KBOU 222014 AFDBOU Area Forecast Discussion National Weather Service Denver/Boulder CO 214 PM MDT Sun Sep 22 2024 .KEY MESSAGES... - Chilly night ahead, with patchy frost and fog possible in portions of the high country and plains tonight. - Warmer and drier this upcoming week with no significant precipitation chances. && .SHORT TERM /Through Monday/... Issued at 215 PM MDT Sun Sep 22 2024 Last of the showers are diminishing over the northeast plains, although an isolated shower is still trying to pop up over the mountains due to daytime heating. Anything that is around will end before sunset, with drier air moving in as upper level ridging builds over the area tonight and Monday. Clearing skies and light winds will allow for strong radiational cooling, so a chilly night is on tap. Patchy frost will be possible in some of the colder spots on the plains (e.g. rural eastern weld County and a few spots around Lincoln County). However, low level moisture in the wake of last night`s and this morning`s rain will limit some of that. The low level moisture also means some patchy fog is possible in the high mountain valleys and typical spots in the Cache La Poudre and South Platte River valleys. Monday will feature warmer temperatures with warm advection and more sunshine. Mid/high clouds will increase from the west late in the day, with perhaps an isolated shower in the high country otherwise warm and dry conditions will prevail for the afternoon hours. && .LONG TERM /Monday night through Sunday/... Issued at 215 PM MDT Sun Sep 22 2024 I hope everyone enjoyed dipping their toes into the cooler and wetter fall-like conditions today, because it seems Mother Nature isn`t quite ready to let the new season take hold. The extended forecast will certainly feel more like summer with above normal temperatures expected through the week as a 500mb ridge centers itself over the Great Basin in the first half of the week. Overnight monday, a cool front will slide south into the forecast area. While increased cloud cover is likely, no precipitation is expected as a result of its passage. Cloudy skies will help keep overnight low temperatures above normal across the plains, and near normal for the high mountains and valleys. 700 mb temperatures associated with the cold front are expected to range between 5-11C on Tuesday, resulting in slightly cooler high temperatures than Monday`s, but still approaching the 80s across the foothills and plains, 60s and 70s for the mountains. 700 mb temperatures quickly increase, nearing 18C through Friday. This will translate to afternoon high temperatures nearing 90 once again across the plains, with Thursday looking like the warmest day of the week. The record high for DIA on this date is 90 degrees, which was last recorded in 2010. While forecasted temperatures don`t quite tie the record, they are expected to come close. These warm and dry conditions are expected to persist into the weekend. && .AVIATION /18Z TAFS through 18Z Monday/... Issued at 1125 AM MDT Sun Sep 22 2024 Rain has ended, but one last band of rain extends north of the airports, still trying to back in from the northeast. We think that band mostly dissipates through ~19-20Z so just VCSH to start, then dry. Ceilings will be improving through the afternoon. Light southeast flow has taken care of the MVFR ceilings for the most part, at least for KDEN and KAPA. We expect a break of the 4000-5000 ft AGL ceilings around 22Z, give or take an hour or two. Then VFR conditions will prevail with mostly clear skies overnight through Monday. Patchy fog threat tonight will stay north of the Denver TAF sites with light drainage winds almost certain (95%) to prevail. && .BOU WATCHES/WARNINGS/ADVISORIES... None. && $$ SHORT TERM...Barjenbruch LONG TERM...Bonner AVIATION...Barjenbruch