Hi Bryan, We just had a flock of at least 30 Chipping Sparrows in my backyard in Mead. Previous high count was 1!
Adrian Lakin, Mead, CO (Weld county) On Sunday, May 10, 2020 at 9:36:36 PM UTC-6, Bryan Guarente wrote: > > COBirders, > Tomorrow morning (6am) is one of those times that I hope to be > really right because it looks amazing for bird migration into the Northern > Front Range (from Denver through Fort Collins). The low-level winds are > funneling into the Northern Front Range. Think of the Northern Front Range > as the small end of the funnel. The opening of the funnel (the other end) > is from Houston to Del Rio, TX. Let me show it to you here: > > > https://earth.nullschool.net/#2020/05/11/1200Z/wind/isobaric/850hPa/orthographic=-105.10,40.19,3000/loc=-105.000,40.000 > (Boulder > is the green circle) > > Track any single streamline that touches the Northern Front Range to its > "origin" and you will get what I mean. I will also attach a few images as > well to show you the funnel at different times. > > Now, this could mean just that the winds happen to be opened up to > migration at that time only, which would be a bummer. But, lo and behold, > the winds are like this starting tonight around Midnight. > > > https://earth.nullschool.net/#2020/05/11/0600Z/wind/isobaric/850hPa/orthographic=-105.10,40.19,3000/loc=-105.000,40.000 > (Boulder > is the green circle) > > I think there are multiple other places along the Front Range that have a > chance of getting migratory turnover (most of Eastern CO) and some areas of > lesser convergence (between Pueblo and Rocky Ford) but the best convergence > is up here in the Northern Front Range and points directly into the > mountains which is really nice for meeting the greatest population > densities. > > If you wonder about whether this is starting to occur or not, you can go > check the radar and see how it looks for migration. An easy way to do that > is with Cornell Lab's birdcast: > > https://birdcast.info/live-migration-maps/ > > This is derived from radar imagery and gives you some clear indication > that this is going to be the case tomorrow morning as the winds are > starting to come into line with what is posted in the midnight link above. > > So, my recommendation, as usual, is to get out birding locally (abiding by > all social distancing and local regulations). Prove me right or wrong. > More datapoints = more clarity. Best of luck with the winds and I wish you > great birding tomorrow! > > Thanks, > Bryan > > Bryan Guarente > Meteorologist/Instructional Designer > UCAR/The COMET Program > Boulder, CO > -- You received this message because you are subscribed to the Google Groups "Colorado Birds" group. To unsubscribe from this group and stop receiving emails from it, send an email to cobirds+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/cobirds/26a4eb57-c0f5-492d-a650-e5dbe623e7cd%40googlegroups.com.
