August 25, 2021

  GFS Forecast: analysis time: 12Z 2021-08-21 :: valid time: 22Z 2021-08-24( Alaska LT: Tue. 2021-08-25 13:00PM)

Links to plots Below

• Fight Information 
• Pan-Arctic maps 
• Beaufort and Chukchi seasonal ice zone 
• Flight conditions at different altitudes along 150°W 

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

2-m temperature contour: -1.8 °C

U/V transect contour: 0 m/s 

Update [17:00PM, Sat., Aug 21, 2021 PST]:

• The low near 150 °W and the low to the west merged to a multicenter system with a southern center north of Barrow. GFS and ECMWF (from Windy) largely agrees. This means the flight path will need to go through the cyclone. 
• The visibility and the ceiling are not ideal for the first three stations.
• The surface temperature is slightly below -2 °C for the fourth station. Might need to be careful about slush when dropping AXCTDs.

• • Flight information (gray vertical lines shows the five stations, from right to left)

• 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
Visibility	Ceiling height	Low-level cloud cover

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

Sea ice concentration at analysis time	Mean sea leve pressure at valid time
2-m air temperature	2-m relative humidty
Visibility	Ceiling height

• Flight conditions at different altitudes along 150 °W