April
21st was a slow day for ruby-throated hummingbird reports
in Northern states. This map shows wind speed and direction
on that day in the area just west of the Great Lakes.
Think:
- Describe
what the winds were doing on April 21.
- Why
do you think we received so few new reports that day?
- What
do you think a wind map might have looked like on April
18th: the day we received so many new reports?
|
Winds: April 21, 2009
(Note: The wider the arrow, the faster the wind
speed.)
Image: Windmapper.com |