I agree.  Bryan's reports are fascinating.   Besides the massive numbers of 
Marbled Godwit and Long-billed Curlew sightings yesterday, I noticed 
several eBird reports stating "FOS".   

Yes, that's one "advantage" of being one of the RBA Compilers - you see 
whats going on around the state while looking for the rarities.  Any 
volunteers out there???   We are very short-staffed, and if you can help 
with one week a quarter we would very much appreciate it.

Thanks Bryan, your posts are much appreciated.
Allison Hilf
Aurora, CO

   
On Wednesday, April 22, 2020 at 4:55:13 PM UTC-6, Robert Raker wrote:
>
> Your reports are are excellent and the information well presented and very 
> interesting to us non-meteorologists. Thanks so much and would love to see 
> them continue! 
> Robert Raker
> Lakewood, CO
>
> On Monday, April 20, 2020 at 9:56:31 PM UTC-6, Bryan Guarente wrote:
>>
>> COBirders,
>> Looks like tomorrow should be a good day for migrational turnover.  
>> Expect that birds from farther south will have a chance to migrate through 
>> the area on stronger southerly winds (FROM the south) originating from 
>> OK/TX.  Unfortunately, there isn't a strong convergence zone that would 
>> help condense the birds into certain locations. You can expect convergence 
>> of birds nearer the foothills than farther east as the mountains act as a 
>> natural convergence area when southeast winds are dominant.  This doesn't 
>> preclude the fact that good habitat attracts birds better than bad 
>> habitat.  So it can always be worthwhile to check your patch multiple times 
>> on a day like tomorrow (4/21)
>>
>> Yesterday (4/19) and today (4/20), the winds aloft have been very weak 
>> promoting more soaring-bird migration but still allowing direct flight 
>> migrations as well with less wind support to cover ground.  Tonight and 
>> into most of tomorrow (4/21), expect the winds to be stronger aloft and 
>> from the south for most of the day making for a stronger possibility of 
>> turnover of birds.  
>>
>>
>> https://earth.nullschool.net/#2020/04/21/1200Z/wind/isobaric/850hPa/orthographic=-105.00,40,1897/loc=-105.00,40
>>  (The 
>> green circle is on Boulder for reference only)
>>
>> I hope you can get a chance to get out (I know it is a work-day) for at 
>> least a walk in your local patch.  You should have a nice opportunity for 
>> some new birds (First-Of-Year/First-Of-Season), but they may not stick 
>> around for long with continued south winds throughout the day into the 
>> night unless your patch has good habitat and food.  
>>
>> May the meteorology bless you tomorrow with birds.  Remember positive and 
>> negative data are both useful to help us understand the overall meshing 
>> between bird migration and weather patterns, so let us know what happens 
>> for you tomorrow.  Best of luck.  
>>
>> Bryan
>>
>> Bryan Guarente
>> Meteorologist/Instructional Designer
>> UCAR/The COMET Program
>> Boulder, CO
>>
>

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