Late May riders on the storm

National overview

Migration activity was highest across the northern tier of states from the Great Lakes to New England last night, while birds were still on the move from South Texas up through the Central U.S. along the latest frontal boundary. Fallout conditions are possible along the frontal boundary, especially along the Lake Michigan shoreline of Wisconsin this morning. Lighter migration was also evident up through the Desert Southwest, along the Central Valley of California, and up into the Pacific Northwest.

national composite nexrad from around 11:00pm on 5/29/13
National Composite NEXRAD from around 11:00pm on 5/29/13

Below are the radar loops from sunset last night through 5:00am (central time) this morning

Upper Midwest

Minnesota

Frames are every 1/2 hour. click on the thumbnail to view the full-sized animation.

base reflectivity image from Duluth base velocity image from Duluth

base reflectivity image from Minnesota base velocity image from Minnesota

Minnesota was within the line of storms as night arrived to the region, but enough clearing had occurred across the Twin Cities and Duluth to allow for heavy migration into and out of the area. Migration was on a S->N trajectory with a slight push to the east which will favor sites along the Lake Superior shoreline (including the north shore) this morning. With migration as heavy as it was, it behooves local birders to head out this morning to see what’s around.

Wisconsin

Frames are every 1/2 hour. click on the thumbnail to view the full-sized animation.

base reflectivity image from green bay, wi base velocity image from green bay, wi

base reflectivity image from milwaukee base velocity image from milwaukee

base reflectivity image from la crosse, wi base velocity image from la crosse, wi

Wisconsin experienced both heavy precipitation and migration last night, which has the potential to cause some heavy fallout, especially along the Lake Michigan shoreline this morning. All three radars showed moderate to heavy migration last night with birds moving SW->NE across the state. Storms moving into eastern WI early this morning pressed birds against the Lake Michigan shoreline and up into the Door Peninsula. Birders from Green Bay to near Chicago, IL should be on alert for fallout conditions in their lakeshore haunts this morning. Birders throughout the interior should see some changing of the guard this morning as well, although birds will be more dispersed across the landscape. For inland birders, hit the tried and true spring migration hotspots, such as Pheasant Branch Conservancy in Middleton, for the best chance at high density and diversity. Birders along the southern border should see below for details on fallout potential.

Iowa & Illinois

Frames are every 1/2 hour. click on the thumbnail to view the full-sized animation.

base reflectivity image from chicago, il base velocity image from chicago, il
base reflectivity image from davenport, ia base velocity image from davenport, ia

Northern IA and IL were south of the main brunt of the storm last night, which meant that birds migrating over these regions were doing so into the storm. Birders in northern IA (and southern WI) who experienced heavy precipitation between 2am and sunrise should check out their local patch this morning for some possible fallout. Birders around Chicago should head to the lakeshore as birds were pushed east throughout the early morning hours (see Wisconsin above).

As always, woodcreeper.com depends on you to report your sightings and be our ‘eyes on the ground’, so please come back and give us an idea of how we’re doing predicting birding conditions in your neck of the woods.

Good Birding,

David

For migration updates in other regions check-

Michigan’s Upper Peninsula - The Northwoods BIRDAR by Max Henschell
New England - Tom Auer’s blog
Florida/SE - Badbirdz Reloaded by Angel and Mariel Abreu
PA/Ohio Valley - Nemesis Bird by Drew Weber
NW Ohio - Birding the Crane Creek by Kenn Kaufman
Pac NW - Birds Over Portland by Greg Haworth
Continental US - eBird BirdCast Forecast & Report by Team eBird

Woodcreeper.com off the grid

I’ll be scouting for our Great Wisconsin Birdathon Big Day for the rest of the week, so I’ll only had intermittent internet and will likely not be able to post the radar until after the weekend. In the meantime, you can get the real-time radar at the following link:

http://weather.rap.ucar.edu/radar/

and you can view the nightly radar loops on Paul Hurtado’s site here:

http://people.mbi.ohio-state.edu/hurtado.10/US_Composite_Radar/index.html

Thanks for understanding and please consider supporting our Birdathon team- the Eagle Optics Team Bird So Hard

See you soon, and good birding,

David

More birds and heavy precipitation moved north into the Upper Midwest

National overview

More trans-Gulf migrants made landfall yesterday morning along the Texas and Louisiana coasts, while sunset triggered another night of moderate to heavy migration across the U.S. Migration was heaviest over the Northeast and New England as well as the Upper Midwest although heavy precipitation broke things up a bit across the latter region. Birds continued to push up the western half of the U.S. with the only exception being the Rockies where northerly flow precluded any major movement.

national composite nexrad from around 11:00pm on 5/20/13
National Composite NEXRAD from around 11:00pm on 5/20/13

Below are the radar loops from sunset last night through 5:00am (central time) this morning

Upper Midwest

Minnesota

Frames are every 1/2 hour. click on the thumbnail to view the full-sized animation.

base reflectivity image from Duluth base velocity image from Duluth

base reflectivity image from Minnesota base velocity image from Minnesota

As a rule birds will migrate whenever a tailwind is present, and so last night with light southerly flow over Minnesota the radar indicated such an event. Precipitation, also as a rule, tends to preclude migration when it’s widespread and especially when it’s heavy. As you can see from the radars last night’s precipitation was intense but not widespread. Given these conditions it makes sense that birds decided to migrate across the state for another consecutive night. Birds were heading on a SW->NE trajectory as they make their way into the North Woods, which would favor inland birding hotspots this morning.

Wisconsin

Frames are every 1/2 hour. click on the thumbnail to view the full-sized animation.

base reflectivity image from green bay, wi base velocity image from green bay, wi

base reflectivity image from milwaukee base velocity image from milwaukee

base reflectivity image from la crosse, wi base velocity image from la crosse, wi

Migration was heaviest in the northern part of Wisconsin last night as the latest wave of birds begins to reach the North Woods and birds across most of the state begin to disperse a bit. Less influx into the southern part of the state is expected this time of year as we move into the latter part of spring migration. Birds over Wisconsin were typically moving on a S->N trajectory with some continued migration up the Lake Michigan shoreline. In addition, some localized concentrations due to early morning storms are also expected. Choosing your birding location today is a bit like fishing in a barrel… with few exceptions most places will yield birds today. I’m very interested to see how places like Lake Park in Milwaukee compare to Bay Beach in Green Bay after this latest movement.

Iowa & Illinois

Frames are every 1/2 hour. click on the thumbnail to view the full-sized animation.

base reflectivity image from chicago, il base velocity image from chicago, il
base reflectivity image from davenport, ia base velocity image from davenport, ia

Storms were heaviest across IA and IL late last night and into this morning, and the radar indicated that this precipitation did preclude any heavy influx into the region. Southwest flow over Chicago appears to have pushed some birds to the lakeshore so despite the lack of major influx, birders in the region should head to the lake for grounded migrants. Otherwise expect good diversity with some reduction in density across most of northern IA and IL this morning.

As always, woodcreeper.com depends on you to report your sightings and be our ‘eyes on the ground’, so please come back and give us an idea of how we’re doing predicting birding conditions in your neck of the woods.

Good Birding,

David

For migration updates in other regions check-

Michigan’s Upper Peninsula - The Northwoods BIRDAR by Max Henschell
New England - Tom Auer’s blog
Florida/SE - Badbirdz Reloaded by Angel and Mariel Abreu
PA/Ohio Valley - Nemesis Bird by Drew Weber
NW Ohio - Birding the Crane Creek by Kenn Kaufman
Pac NW - Birds Over Portland by Greg Haworth
Continental US - eBird BirdCast Forecast & Report by Team eBird

Strong low pressure brings another mass of birds to the Upper Midwest

National overview

Light trans-Gulf migration along the Texas and western Louisiana coast was followed by heavy nocturnal migration up through the middle of the U.S. (>25 dBZ). The most recent front moving across the Upper Plains and Midwest packed some serious storm activity which appears to have caused fallout conditions in its path. On the backside of the front migration was light to nonexistent, while farther to the east migration continued at light to moderate densities (5-20 dBZ). Light migration was also apparent up the Pacific from Arizona to Washington State.

national composite nexrad from around 11:00pm on 5/19/13
National Composite NEXRAD from around 11:00pm on 5/19/13

Below are the radar loops from sunset last night through 5:00am (central time) this morning

Upper Midwest

Minnesota

Frames are every 1/2 hour. click on the thumbnail to view the full-sized animation.

base reflectivity image from Duluth base velocity image from Duluth

base reflectivity image from Minnesota base velocity image from Minnesota

By the time night fell on Minnesota, most of the state was within the tumult of a serious low pressure system. Surface winds were light and from the east, upper-level winds were from the south, and local winds associated with thunderstorms varied depending on the position of the storm. Add to this the fact that we’re in late May with many migration-ready birds in the system and you have a recipe for a bird migration gumbo with a side of extreme weather. Both radars indicate moderate to heavy migration last night with densities fluctuating during storm passages. Birds appeared to re-emerge after passage of storms, although some localized fallout is still expected throughout the region where the heaviest storms passed between 2am and daybreak. Otherwise the main trajectory of migrants was from the SE->NW as birds piled along western Lake Superior yesterday try to push west into more substantial habitat, and birds throughout the region make their way north to the breeding grounds. Expect inland hotspots to shine this morning while densities along the Lake Superior shoreline will be lower than yesterday (but diversity will still be high).

Wisconsin

Frames are every 1/2 hour. click on the thumbnail to view the full-sized animation.

base reflectivity image from green bay, wi base velocity image from green bay, wi

base reflectivity image from milwaukee base velocity image from milwaukee

base reflectivity image from la crosse, wi base velocity image from la crosse, wi

Another big flight into and out of Wisconsin last night with some heavy migration up the Lake Michigan shoreline. Birders along Lake Michigan should hit lakeside migrant traps this morning as they should be hopping with birds. Interior birders experiencing heavy precipitation between midnight and daybreak should hit local hotspots as well. We’re in the thick of migration right now and the landscape is saturated with birds. Go Birding!

Iowa & Illinois

Frames are every 1/2 hour. click on the thumbnail to view the full-sized animation.

base reflectivity image from chicago, il base velocity image from chicago, il
base reflectivity image from davenport, ia base velocity image from davenport, ia

More heavy precipitation moved into the western part of the forecast area, some of which can be seen moving across Davenport throughout the night and early morning. While many birds continued to migrate on either side of the storms, some fallout around Davenport is expected today in areas affected by precipitation between 2am and daybreak. Strong SW->NE movement over Chicago favors lakeside hotspots this morning and both density and diversity should be great there. Go Birding!

As always, woodcreeper.com depends on you to report your sightings and be our ‘eyes on the ground’, so please come back and give us an idea of how we’re doing predicting birding conditions in your neck of the woods.

Good Birding,

David

For migration updates in other regions check-

Michigan’s Upper Peninsula - The Northwoods BIRDAR by Max Henschell
New England - Tom Auer’s blog
Florida/SE - Badbirdz Reloaded by Angel and Mariel Abreu
PA/Ohio Valley - Nemesis Bird by Drew Weber
NW Ohio - Birding the Crane Creek by Kenn Kaufman
Pac NW - Birds Over Portland by Greg Haworth
Continental US - eBird BirdCast Forecast & Report by Team eBird

Heavy migration continues through the Upper Midwest

National overview

No trans-Gulf migration was visible on the radar last night, while nocturnal migration proceeded at break-neck pace across the eastern half of the U.S. As a new set of low pressure cells approached from the Plains region, associated southerly winds triggered heavy migration up through the central region, including Wisconsin. Light migration was also evident up through interior California and into the Pacific Northwest.

national composite nexrad from around 11:00pm on 5/18/13
National Composite NEXRAD from around 11:00pm on 5/18/13

Below are the radar loops from sunset last night through 5:00am (central time) this morning

Upper Midwest

Minnesota

Frames are every 1/2 hour. click on the thumbnail to view the full-sized animation.

base reflectivity image from Duluth base velocity image from Duluth

base reflectivity image from Minnesota base velocity image from Minnesota

Radar interpretation for last night’s movement is fairly straightforward: birds were moving in high numbers across Minnesota and Wisconsin. All radars indicated some of the heaviest migration of the season last night and into the morning with the main heading at almost due north. With no weather to put birds down in any particular location, expect them to be well dispersed across the landscape today. Hit the known spring migrant traps for the best conditions today. Species diversity should begin to peak in the northern part of the state today as many more long-distance migrants make their way into the farthest reaches of the North Woods.

Wisconsin

Frames are every 1/2 hour. click on the thumbnail to view the full-sized animation.

base reflectivity image from green bay, wi base velocity image from green bay, wi

base reflectivity image from milwaukee base velocity image from milwaukee

base reflectivity image from la crosse, wi base velocity image from la crosse, wi

With all the great reports of birding conditions throughout Wisconsin over the last few days, it’s no wonder the radars lit up like Christmas last night. As with Minnesota, heavy migration was widespread last night and into the morning with a heading of due north. Expect birds to be dispersed throughout the landscape today with some potential concentrations along the south shore of Lake Superior and at known spring hotspots statewide. Migration density was higher in the northern half of the state so birders in the south may experience a net loss in density today, although diversity is expected to remain high.

Iowa & Illinois

Frames are every 1/2 hour. click on the thumbnail to view the full-sized animation.

base reflectivity image from chicago, il base velocity image from chicago, il
base reflectivity image from davenport, ia base velocity image from davenport, ia

Migration was moderate to heavy over northern IA and IL last night, and consistent with Wisconsin and Minnesota in that birds were heading due north with little to no obstruction. Expect birds to be dispersed across the landscape this morning with good birding at both inland and lakeshore migrant traps today.

As always, woodcreeper.com depends on you to report your sightings and be our ‘eyes on the ground’, so please come back and give us an idea of how we’re doing predicting birding conditions in your neck of the woods.

Good Birding,

David

For migration updates in other regions check-

Michigan’s Upper Peninsula - The Northwoods BIRDAR by Max Henschell
New England - Tom Auer’s blog
Florida/SE - Badbirdz Reloaded by Angel and Mariel Abreu
PA/Ohio Valley - Nemesis Bird by Drew Weber
NW Ohio - Birding the Crane Creek by Kenn Kaufman
Pac NW - Birds Over Portland by Greg Haworth
Continental US - eBird BirdCast Forecast & Report by Team eBird