September 21, 2017

  GFS Forecast: analysis time: 12Z 2017-09-11 :: valid time: 21Z 2017-09-21

Sea ice contours: 15% (blue), 50% (black), 90% (red)

2-m temperature contour: -1.8 C

U/V transect contour: 0 m/s 


Update [10:30AM, Mon. Sep 12, 2017 PST] : 225-hour forecast. Cold, moist, cloudy, easterly winds. High pressure to the north of 75N and low to the southwest. The low brings warm and moist air from the southwest. The ice edges of 15% and 50% are close right now and are around 79N at 150W and 78N at 140W. Winds shift from the northerly winds of 24 hours ago to westerly in the current forecast. The pattern can still change a lot at this point. 


  • Pan-Arctic maps

Sea ice concentration at analysis time

Mean sea leve pressure at valid time

700 hPa Geopotential Height

700 hPa temperature

700 hPa relative humidity

700 hPa wind speed

Pressure on 2PVU surface

Pressure on 2PVU surface

Low-level cloud cover

Mid-level cloud cover

 

  • Beaufort and Chukchi seasonal ice zone (the map is centered at 150W)

Sea ice concentration at analysis time

Mean sea leve pressure at valid time

2-m air temperature

2-m relative humidty

low cloud fraction

middle cloud fraction

 

  • Transects along 150W

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