|Tonight's winds...the cold front still starkly|
visible. This cold front will be pushed
northward starting tomorrow, and the
favorable southerly winds beneath will
expand into the rest of the state.
I hope you all had a good day birding. With birds like Harris's Sparrow, American Avocet, Upland Sandpiper, and Black-throated Gray Warbler among today's many reports, it seems like many of you did enjoy birding the migration today. Movements last night actually became heavier after I published the report, and arrivals and influxes throughout the state were evidence of this. The onset of heavy spring arrivals and influxes remain rather protracted, as species counts are only creeping up (except in Southern Illinois). The birds, just like the leaves, are taking their time.
So how about tonight? As predicted, wind maps relay that winds have become much more northerly everywhere in the state except for far southern Illinois. As expected, most of the birds don't want to mess with these chilly northeasterly headwinds, and are staying put for a good night's sleep. In Southern Illinois, tailwinds are still strong and direct, and birds there are hopping on for the ride. Looking forward, we can now actually see what will bring favorable conditions back on the surface analysis forecast. We'll get to that later. Let's take a look at what's over our heads by region:
|Tonight's radar...light in N and Central|
IL...heavy in Southern Illinois.
|THIS is the big news, that warm front...it's the above|
mentioned front moving northward. Beneath it will be
favorable, southerly winds.
Central Illinois is also host to some courageous migrants fighting the headwinds, with moderate migration occurring throughout. Like in Northern Illinois, this concentration of movement likely won't last through the night, and tomorrow morning will probably only result in a light mixup of the birds in your local patch. Tomorrow is a refueling time at least for neotropical migrants, and there is hardly a better time to observe migrant behavior, especially that of their social interactions, than during refueling periods. So get out there and share what you observe! The wind forecast in Central IL is the same as Northern Illinois; the only difference is that favorable conditions come sooner! By tomorrow afternoon, a counterclockwise-rotating low pressure system in Kansas will push northward the boundary between the favorable winds in Southern Illinois and the cold, northerly winds of the rest of the state. Thanks to this system, winds should be favorably southerly by tomorrow night, so get your binocs ready for Thursday!
|Heavy Migration over Southern IL|
Looking at national, composite radar, Southern Illinois--along with southern Indiana--stands out from the surrounding area with the heaviness of its migration. Birds are moving in heavy concentrations over S. IL tonight, as favorable southerly winds have remained there through the less favorable easterly and northeasterly winds seen in the rest of the state. So tomorrow should be great for observing arrivals and influxes (radar for SW IL, S-central IL, and SE IL)! Southern Illinois will be the refuge for migrants waiting to move northward once the right conditions present themselves...I can only imagine how the radar will ignite throughout the state in bright greens and blues when the time comes. Anyway, the wind forecast is equally good to Southern Illinois. Southerly winds are forecast to continue at least through the end of the forecast period on Wednesday evening, but looking at the movement of low pressure systems in the area, they will probably last longer. So sit back and enjoy the show!
|Click me to predict the future|
Cool! To predict for yourself what birds you'll be seeing tomorrow, here's my secret weapon from eBird.
And that's all I've got folks! Have a great night and happy birding!