News: Forecast and Analysis

Forecast and Analysis
By Andrew Farnsworth The Cornell Lab May 05, 2017

Moderate flights occurred in many areas of the West and featured Spotted Sandpiper, Wilson's Phalarope, Warbling Vireo, Swainson's Thrush, Western Tanager, Black-headed Grosbeak, and Evening Grosbeak, while in the East moderate and heavy flights punctuated by intense low pressure systems featured Mississippi Kite, Yellow-bellied Flycatcher, Bell's Vireo, Bay-breasted Warbler, Magnolia Warbler, Canada Warbler, Rose-breasted Grosbeak, Bobolink, and Dickcissel.  Read more...

Forecast and Analysis
By Andrew Farnsworth The Cornell Lab May 04, 2017

Team BirdCast is looking closely at the current frontal boundary pushing across the southeastern US and pondering what it might mean for those competing in the World Series of Birding 2017, among other birding events presumably scheduled in the coming days.  Read more...

Forecast and Analysis
By Andrew Farnsworth The Cornell Lab Apr 28, 2017

Conditions are mostly marginal for scattered light to moderate flights of Long-billed Dowitcher, Wilson's Phalarope, Western Wood-Pewee, Swainson's Thrush, Yellow Warbler, Western Tanager, and Bullock's Oriole after a strong frontal passage in the West, while the first half of the period in the East see many areas with favorable conditions for moderate to very heavy flights featuring Short-billed Dowitcher, Black Tern, Common Nighthawk, Willow Flycatcher, Least Flycatcher, American Redstart, and Wilson's Warbler. Conditions for trans-Gulf migration will be generally favorable during the period, with the potential for late weekend and early work week fallouts and concentrations in the Gulf Coast states as frontal passages with precipitation are forecast.  Read more...

Forecast and Analysis
By Andrew Farnsworth The Cornell Lab Apr 26, 2017

Team BirdCast has been watching the trans- and circum-Gulf movements unfold in the last days. Today's movement is an exciting one, featuring the arrival of large numbers of migrants and another frontal boundary.  Read more...

Forecast and Analysis
By Andrew Farnsworth The Cornell Lab Apr 21, 2017

The West will see light to moderate flights, particularly in the Desert Southwest late in the weekend and late in the work week, featuring Spotted Sandpiper, Long-billed Dowitcher, Swainson's Thrush, Townsend's Warbler, MacGillivray's Warbler, Black-headed Grosbeak, and Western Tanager, while a pulse of highly favorable migration period late in the period in the East will bring moderate to very heavy flights featuring Red-headed Woodpecker, Acadian Flycatcher, Least Flycatcher, Swainson's Thrush, Chestnut-sided Warbler, Bay-breasted Warbler, Northern Parula, and Mourning Warbler. Early period brings a dynamic and complex atmosphere will potential for Gulf Coast concentrations, where late period brings a major incursion of Neotropical migrants across and around the Gulf of Mexico, as favorable flight conditions arrive in Mexico and northern Central America at the peak of the season.  Read more...

Forecast and Analysis
By Andrew Farnsworth The Cornell Lab Apr 21, 2017

Moderate movements featuring Semipalmated Plover, Caspian Tern, Olive-sided Flycatcher, Warbling Vireo, Swainson's Thrush, Nashville Warbler, and Western Tanager were the norm for California and the Desert Southwest, while moderate to locally heavy flights graced portions of the East and featured Spotted Sandpiper, Great Crested Flycatcher, Red-eyed Vireo, Wood Thrush, Blackpoll Warbler, Baltimore Oriole, and Dickcissel.  Read more...

Forecast and Analysis
By Andrew Farnsworth The Cornell Lab Apr 14, 2017

Scattered favorable conditions primary in the middle of the forecast period will see light to moderate flights of Green Heron, Western Sandpiper, Red-necked Phalarope, Olive-sided Flycatcher, Hammond's Flycatcher, Warbling Vireo, and Townsend's Warbler for the West, while widespread favorable migration bring moderate to heavy flights in many areas of the East and will feature Sora, Least Sandpiper, Semipalmated Sandpiper, Common Nighthawk, Blue-headed Vireo, Kentucky Warbler, Summer Tanager, and Painted Bunting. Continued unfavorable conditions in many areas of northern Central America will slow the typical seasonal pulses of trans-Gulf migration.  Read more...

Forecast and Analysis
By Andrew Farnsworth The Cornell Lab Apr 14, 2017

The past week in the West saw light to moderate flights primarily in the southern portion of the region featuring Swainson's Hawk, Vaux's Swift, Ash-throated Flycatcher, Cassin's Vireo, Nashville Warbler, Grace's Warbler, and Lazuli Bunting, while moderate and locally heavy flights came to many areas of the East and featured Marbled Godwit, Hudsonian Godwit, Swainson's Thrush, Wood Thrush, House Wren, Northern Parula, Tennessee Warbler, and Rose-breasted Grosbeak.  Read more...

Forecast and Analysis
By Andrew Farnsworth The Cornell Lab Apr 07, 2017

Continental Summary Widespread light to moderate movements that feature Forster’s Tern, Vaux’s Swift, Bank Swallow, Wilson’s Warbler, Hermit Warbler, and Lazuli Bunting come to the West to begin and end the period, while the East experiences a series of moderate to heavy flights of Broad-winged Hawk, Sora, Semipalmated Plover, Semipalmated Sandpiper, Wilson’s Phalarope, Eastern Wood-Pewee, White-eyed Vireo, and […]  Read more...

Forecast and Analysis
By Andrew Farnsworth The Cornell Lab Mar 31, 2017

Mostly unfavorable conditions for migration dominate in the West, restricting light to moderate flights of Green Heron, Black-bellied Plover, Ash-throated Flycatcher, American Pipit, Yellow-rumped Warbler, and Golden-crowned Sparrow to late in the period or local distributions, while mid and late period southerly flow will bring an influx of Caspian Tern, Forster's Tern, Barn Swallow, Blue-gray Gnatcatcher, Prothonotary Warbler, Worm-eating Warbler, Palm Warbler, Summer Tanager, Lark Sparrow, Indigo Bunting, and Blue Grosbeak in moderate to locally heavy movements. Fallout potential on the Gulf Coast arrives on Monday and Tuesday in mid to eastern Gulf states and again on Thursday and Friday with the passage of significant frontal boundaries.  Read more...

Forecast and Analysis
By Andrew Farnsworth The Cornell Lab Mar 31, 2017

Scattered among the West's areas of persistent precipitation during were light to moderate flights featuring Turkey Vulture, Greater Yellowlegs, Black-headed Grosbeak, and Hooded Oriole, while pulses of similarly intense flights featuring Great Egret, Eastern Kingbird, Barn Swallow, Brown Thrasher, Prothonotary Warbler, and Louisiana Waterthrush occurred in advance of multiple frontal passages in the East.  Read more...

Forecast and Analysis
By Andrew Farnsworth The Cornell Lab Mar 24, 2017

The West will see a mix of marginal migration conditions spawning scattered light to moderate movements featuring Caspian Tern, Cassin's Vireo, Barn Swallow, American Pipit, Black-throated Gray Warbler, Savannah Sparrow, and Golden-crowned Sparrow, while light to locally heavy flights in the first half of the period and to end the period in the East will feature Sharp-shinned Hawk, Franklin's Gull, Northern Rough-winged Swallow, Great Crested Flycatcher, Pine Warbler, Yellow-throated Warbler, Yellow-headed Blackbird, Orchard Oriole, and Field Sparrow. The forecast for late in this period also suggests the first significant chance for fallouts and concentrations of migrants along the Gulf Coast.  Read more...

Forecast and Analysis
By Andrew Farnsworth The Cornell Lab Mar 24, 2017

The West experienced light to moderate movements early in the period, primarily in the southern reaches of the region, featuring Osprey, Pacific-slope Flycatcher, Western Kingbird, Barn Swallow, Warbling Vireo, and Grace’s Warbler, while the central and southern portions of the East experienced light to moderate flights featuring Great Blue Heron, Osprey, American Golden-Plover, Lesser Yellowlegs, Pectoral Sandpiper, Black-chinned Hummingbird, Scissor-tailed Flycatcher, and Louisiana Waterthrush. The greatest extent of these movements occurred in the West on 17-18 March and in the East on 23-24 March.  Read more...

Forecast and Analysis
By Andrew Farnsworth The Cornell Lab Mar 17, 2017

A week of often favorable migration conditions punctuated with scattered precipitation will see light to moderate flights in many areas of the West that will feature American White Pelican, Black-chinned Hummingbird, Pacific-slope Flycatcher, Orange-crowned Warbler, White-crowned Sparrow, and Hooded Oriole, while cooler temperatures in the East alternate with some pulses of marginally favorable migration conditions that feature light to moderate movements of Common Loon, Double-crested Cormorant, Broad-winged Hawk, Northern Flicker, Purple Martin, Golden-crowned Kinglet, and Prairie Warbler.  Read more...

Forecast and Analysis
By Andrew Farnsworth The Cornell Lab Mar 17, 2017

Light to moderate flights in the West, primarily in California and the Desert Southwest, featured Black-chinned Hummingbird, Western Kingbird, Pacific-slope Flycatcher, Warbling Vireo, Wilson's Warbler, and Hooded Oriole, while a mostly quiet and cooler East saw locally moderate movements featuring Swainson's Hawk, Lesser Yellowlegs, Pectoral Sandpiper, Hooded Warbler, Fox Sparrow, and Chipping Sparrow.  Read more...

Forecast and Analysis
By Andrew Farnsworth The Cornell Lab Mar 10, 2017

A pulse of widespread light to moderate movements in favorable migration conditions comes to the West on Tuesday, Wednesday, and Thursday with species on the move including Rufous Hummingbird, Western Kingbird, Orange-crowned Warbler, Lucy's Warbler, Hooded Oriole, and Scott's Oriole, while highly variable, and in some cases extreme wintry, weather halts and starts mostly light to moderate flights that will include Blue-winged Teal, Green-winged Teal, Osprey, Killdeer, Greater Yellowlegs, Baird's Sandpiper, Pectoral Sandpiper, Yellow-throated Vireo, Blue-gray Gnatcatcher, Louisiana Waterthrush, and Field Sparrow.  Read more...

Forecast and Analysis
By Andrew Farnsworth The Cornell Lab Mar 10, 2017

Scattered light to moderate movements, primarily in California and the Desert Southwest, punctuated the early migration scene in the West and featured Swainson's Hawk, Pacific-slope Flycatcher, Ash-throated Flycatcher, Bell's Vireo, Sage Thrasher, and Hooded Oriole, while light to moderate flights in the southern states featured Blue-winged Teal, Osprey, Chuck-will's-widow, Eastern Phoebe, Tree Swallow, Marsh Wren, and Summer Tanager.  Read more...

Forecast and Analysis
By Andrew Farnsworth The Cornell Lab Mar 03, 2017

A favorable weekend forecast will see light to locally moderate flights of numerous species of waterfowl, Tree Swallow, Northern Rough-winged Swallow, and Ruby-crowned Kinglet in the West, while a weekend blast of winter cold precedes a serious of much more favorable spring like days with moderate to locally heavy flights of waterfowl, Killdeer, Eastern Phoebe, and Red-winged Blackbird in the East.  Read more...

Forecast and Analysis
By Andrew Farnsworth The Cornell Lab Nov 18, 2016

A general quiet late season period in the West will see scattered light flights in the middle of the work week that feature Northern Shoveler, Northern Pintail, Tundra Swan, Northern Harrier, Sandhill Crane, Mew Gull, and Say's Phoebe, while two strong frontal passages will bring light to moderate late season flights of Canada Goose, Tundra Swan, Bufflehead, Long-tailed Duck, Red-throated Loon, American Pipit, White-throated Sparrow, and Dark-eyed Junco to the East.  Read more...

Forecast and Analysis
By Andrew Farnsworth The Cornell Lab Nov 11, 2016

Scattered light movements will be the norm for this late season period with higher intensities and extents to end the week that will feature Tundra Swan, Green-winged Teal, Gadwall, Lesser Scaup, Pied-billed Grebe, Eared Grebe, Say's Phoebe, and American Pipit, while the East sees a significant early and late period push of moderate to locally heavy movements featuring Redhead, Lesser Scaup, Common Loon, Horned Grebe, Bonaparte's Gull, Hermit Thrush, and Field Sparrow.  Read more...

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