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 [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/cobirds/26a4eb57-c0f5-492d-a650-e5dbe623e7cd%40googlegroups.com.
