News: Forecast and Analysis

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

Movements in the West were local and light, primarily along the Pacific Coast, featuring Tundra Swan, Common Goldeneye, Bufflehead, Bonaparte's Gull, Golden-crowned Kinglet, Bohemian Waxwing, and Purple Finch, while in the East pulses of sub-regional movements were moderate to locally heavy and featured Greater Scaup, Bufflehead, Hooded Merganser, Red-throated Loon, Horned Grebe, American Robin, American Tree Sparrow, Pine Siskin, and Purple Finch.  Read more...

The West will experience some conditions favorable for locally light to moderate flights during the middle and latter parts of the period that will feature White-winged Scoter, Surf Scoter, Common Loon, Clark's Grebe, California Gull, Merlin, Ruby-crowned Kinglet, and Dark-eyed Junco, while the East will experience several pulses of such favorable conditions with light to locally heavy movements that features Greater White-fronted Goose, Green-winged Teal, Ring-necked Duck, Canvasback, Red-necked Grebe, Ring-billed Gull, Caspian Tern, Red-winged Blackbird, Fox Sparrow, and Dark-eyed Junco.  Read more...

A quiet week in the West for migration saw a few, mostly coastal pulses of light to moderate movements featuring Tundra Swan, Red Phalarope, Bonaparte's Gull, Ruby-crowned Kinglet, American Pipit, Cedar Waxwing, and Dark-eyed Junco, while moderate to locally heavy flights associated with frontal passages featured Northern Pintail, Common Goldeneye, Long-tailed Duck, Long-billed Curlew, Northern Shrike, Sedge Wren, and American Tree Sparrow in the East.  Read more...

Scattered and local light to moderate flights begin and end the period in the West and feature White-winged Scoter, Common Loon, Western Grebe, Red-necked Grebe, Dunlin, Marsh Wren, and White-throated Sparrow, moderate to heavy flights begin and end the period in the East and feature American Wigeon, Surf Scoter, Pied-billed Grebe, Northern Harrier, Sandhill Crane, Dunlin, Sedge Wren, Lincoln's Sparrow, and Pine Siskin.  Read more...

Scattered light to moderate flights were the later period highlights in the West, while moderate to very heavy flights graced the later period in the East.  Read more...