Seattle, WA

January 31, 2011

Where is Seattle?

Lots of terrain and orography

Satellite

http://www.atmos.washington.edu/~ovens/loops/

Some high clouds in the area, but they are to the north. There appears to be a ridge in the area for now.

Radar

• http://www.weatheroffice.gc.ca/radar/index_e.html?id=XSI

• http://www.rap.ucar.edu/weather/radar/displayRad.php?icao=KATX&prod=bref1&bkgr=black&endDate=20110131&endTime=-1&duration=0

Not much on radar except for areas of heavy precip? Or is that something else? Hmm…

METARS

http://www.rap.ucar.edu/weather/surface/index.php?metarIds=KSEA&hoursStr=past+60+hours&std_trans=translated&num_metars=number&submit_metars=Retrieve

ZzZzZzZz Boring

Models

• 500 mb height and vorticity:– http://www.nco.ncep.noaa.gov/pmb/nwprod/analysis/namer/nam/

18/index_500_m_loop.shtml

• 700 mb moisture:– http://www.nco.ncep.noaa.gov/pmb/nwprod/analysis/namer/nam/

18/index_700_m_loop.shtml

• MSLP, Precip, and 850mb T:– http://www.nco.ncep.noaa.gov/pmb/nwprod/analysis/namer/nam/

18/index_pcp_m_loop.shtml

• SFC T:– http://www.rap.ucar.edu/weather/model/displayMod.php?

var=gfs_sfc_temp&loop=1

• Long wave ridge pattern

• Strong High pressure to the south– Stable– Subsidence

• Temperature gradient near the coast

MOS

http://www.nws.noaa.gov/cgi-bin/mos/getall.pl?sta=KSEA

The MOS values are pretty similar to each other, so there is good agreement between models.

• High 44– North winds will be light– Clouds look to be lingering

• Low 31– Clouds hanging around overnight– Light winds so more cooling

• Winds 7– Winds might pick up if there is some clearing

• Precip 0– Longwave ridge patter– High pressure

Forecast Comparison

• Me– 44 31 7 0

• NWS– 44 32 light 0

ter@hawaii.edu HIG 370