Seattle WA January 31 2011 Where is Seattle

Seattle, WA January 31, 2011

Where is Seattle?

Lots of terrain and orography

Satellite http: //www. atmos. washington. edu/~ovens/lo ops/ 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. ht ml? id=XSI • http: //www. rap. ucar. edu/weather/radar/display. R ad. php? icao=KATX&prod=bref 1&bkgr=black&en d. Date=20110131&end. Time=-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/ind ex. php? metar. Ids=KSEA&hours. Str=past+6 0+hours&std_trans=translated&num_meta rs=number&submit_metars=Retrieve Zz. Zz. Zz 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 850 mb 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/display. Mod. 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/cgibin/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