Trowal - pressure and wind on the 300 K surface
Notes:
The trowal (trough of warm air aloft) air stream is easily identifiable on the 300 K isentropic surface. Trowals are known to be associated with heavy snow. The data on these slides show the trowal developing off the mid-Atlantic coast during the afternoon on the 25th, then extending westward, across New England, New York and Pennsylvania, during the early morning on the 26th.|
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Valid Thu 1800 UTC 25-Feb-2010 Valid Fri 0000 UTC 26-Feb-2010 Valid Fri 0600 UTC 26-Feb-2010 Valid Fri 1200 UTC 26-Feb-2010 |
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Slide 14