As the latest cold front pushed east to the Atlantic, migration was heaviest right along the Eastern Seaboard. Southerly flow over the Florida Straits and Gulf of Mexico also brought a pulse of Caribbean, Trans-Gulf and Circum-Gulf migrants into the Lower 48 last night. Migration continued on the Left Coast as well, with heavy radar returns evident from the Desert Southwest, Great Basin, and Central Valley of California up through the Pacific Northwest. High pressure across the Great Plains and Midwest, however, kept most grounded over the region last night.

Migration continued across the Eastern US in advance of the latest frontal boundary. Heaviest migration was apparent over northern Florida, throughout the Southeastern US, the Texas Gulf Coast and up the Pacific Coast of California. Migration was evident as far northwest as Oregon and Washington. Those areas immediately behind the front experienced little to no northbound movement, as these areas are typically under strong northwesterly wind and/or heavy precipitation. Interestingly, the radar did indicate some southbound movement over Wisconsin and northern Iowa suggesting a bit of reverse migration (see below for details).

National overview Migration was hot and heavy from Michigan to Texas, along the most recent cold front to move across the Central US. Migration was evident across New England, the Great Lakes Region, the Gulf Coast from the Florida Peninsula to the Texas/Mexico border, and across the Desert Southwest and up the Pacific coast into […]

Southeasterly flow from Texas to Duluth triggered some much anticipated migration into the Upper Midwest last night. The Pacific Coast, as well, experienced some moderate to heavy migration as winds over the region slackened yesterday.