Tues 06 Sept 2011

First image is of the winds aloft at 850 mb (approx 5000 ft). Winds over the state were light and variable.

Second image is a snapshot of the base velocity showing north to south directionality at a peak of 20 to 25knots.

Third image is an animated gif with snapshots every half hour of the base reflectivity above radar station RTX.  Animation runs from around 8:00 pm pdst yesterday evening through 5:00 am pdst this morning. (Click on the thumbnails to view the full-sized images and animation.)

Sunset last night was at 7:41 pm pdst.

Density was not quite as heavy as last night but still had reflectivity readings up into the 20 dBz range.  Plenty of new birds should be in the area today.  The heaviest concentrations look to be east of Portland along the Cascades.

The national migration pattern continues as the tropical depression slowly moves NNE.  along the central and Mississippi flyways, after weeks of southerly winds, they have shifted to northerly as the recent tropical depression moved inland .  The radars were lit up again last night.  Conversely, the eastern flyway is still shut down from the SSE winds associated with the leading edge of the same front.  You can also see the wide band of rain running from Alabama to Maine.  Notice how the birds hug the trailing edge of the storm taking advantage of the strongest  of the northerly winds.

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