September 12, 2019

  GFS Forecast: analysis time: 12Z 2019-09-09 :: valid time: 00Z 2019-09-13 ( Alaska LT: Tue. 2019-09-12 16:00PM)

Links to plots Below

• Fight Information (from 10 km resolution WRF runs forced by GFS data)
• Pan-Arctic maps (GFS)
• Beaufort and Chukchi seasonal ice zone (GFS)
• Transects along 150 °W (GFS)
• Flight conditions at different altitudes along 150°W (GFS)

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

2-m temperature contour: -1.8 °C

U/V transect contour: 0 m/s 

Update [14:30AM, Mon. Sep. 09, 2019 PST]:  

Sea ice edge at slightly north of 78 °N. The surface temperature over ice is slightly below 0 °C north of ice edge. High surface visibility south of 73 °N and below 1 mile north of 73.3 °N. Ceiling height is increasing from below 1000 ft near the coast to 3000 ft at 73.5 °N, corresponding to the deepening boundary layer. North of 74.5 the ceiling height is low, around 1000 ft. There is a surface high centered at 74.2 °N, 150 °W. With easterly wind along the coast and westerly wind to the north. 

• • Flight information

• 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	Low-level cloud cover	Mid-level cloud cover

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

 middle cloud fraction

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 150 °W

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• Flight conditions at different altitudes along 150 °W