Overnight on September 20th, the conditions are really good for migrant movement and convergence over CO. Here is my "now" (8pm Sept 20): https://earth.nullschool.net/#current/wind/isobaric/850hPa/orthographic=-107.89,46.82,1601/loc=-105.120,40.191 (Green circle at Longmont, CO)
You can see a nice swath of convergent winds from Canada into somewhere just east of Longmont (I'll be outside listening in a few minutes after this email is sent). And that long swath convergence from up north in Canada remains strong throughout the night, but alters position to further south at 6am: https://earth.nullschool.net/#2022/09/21/1200Z/wind/isobaric/850hPa/orthographic=-107.89,46.82,1601/loc=-105.120,40.191 (Green circle at Longmont, CO) At 6am, that pattern looks better to be dropping birds along the Arkansas River and a bit south of that. Make sure to get out and check in the morning because anywhere behind this front you could find funneled birds. And for those wanting to night-listen, the cloud cover will be dropping lower as the night goes on. This will bring the birds lower to the ground as well, making them easier to hear. If you want to track the forecast cloud cover at DIA, you can check it out here <https://hwp-viz.gsd.esrl.noaa.gov/wave1d/?location=KDEN&col=2&hgt=1&selectedgroup=Custom&obs=true&fontsize=1&darkmode=auto&graph=fa-chart-bar&probfield=Tmax&proboperator=%3E%3D&probvalue=40&colorfriendly=false&whiskers=false&boxes=true&median=false&det=true&tz=local&customgroup=CloudCover%2CCeiling%2CWindDirection%2CWinds%2CWindsAloft>. If you click the three horizontal bars in the top right corner, you can select different locations as needed. Hope you get some good birds moving through tomorrow despite the rain. 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 post to this group, send email to cobirds@googlegroups.com For more options, visit this group at http://groups.google.com/group/cobirds?hl=en?hl=en * All posts should be signed with the poster's full name and city. Include bird species and location in the subject line when appropriate * Join Colorado Field Ornithologists https://cobirds.org/CFO/Membership/ --- 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/CAENnWHv9drJwM8HWoPYrxTJwtjnuG6-EF8F5vxLj4Ty39xKO-g%40mail.gmail.com.
