19 Mar 2014 PNW Migration Update

The ridge of high pressure has kind of stalled and while this brings clear skies the winds remain out of the WNW, but very lightly.  This provoked some migrants to head north but in very light densities.   Looking at the Reflectivity loop we can see some returns exceeding 10 dBZ but not many and not for long.  All in all, a very lightly traveled Pacific Flyway last night.

I put in a loop for the Medford (KMAX) radar from last night which shows the same pattern; movement, but low density.

Here are last night’s loops (click on the links to bring up the .gif files):

19 Mar Base Reflectivity - Portland (KRTX)

19 Mar Base Velocity - Portland (KRTX)

19 Mar HC - Portland (KRTX)

19 Mar Base Reflectivity - Medford (KMAX)

Here is Paul’s archive National Radar Composite from yesterday.  More movement up from Texas.  Tonight the birds went up the Mississippi Flyway and into the Ohio Valley.  A bit more widespread than last night.  Not much happening along the east coast – except weather.

Here are the weather maps: