GFS Forecast: analysis time: 18Z 2019-06-10 :: valid time: 22Z 2019-06-12 ( Alaska LT: Tue. 2019-06-12 14:00PM)
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 [09:00PM, Mon. Jun. 10, 2019 PST]:
Good surface visibility over 5 miles. Ceiling heights at 3000 ft south of 72 °N and gradually decrease to 1000 ft at 74 °N and 700 ft at 76 °N. Flight path is on the western flank of a cyclone, cloudy with northerly surface winds from 15 to 18 knots. Surface air temperature is slightly below to 0 °C and dew point around -1 °C.
Update [04:00PM, Sun. Jun. 9, 2019 PST]:
The cyclone is now centered around 135 °W around 75 °N. The wind is mostly northerly along the flight path. The surface is windy, with wind speed between 10 m/s to 15 m/s. Visibility is still good and ceiling is high, around 3000 ft south of 72 °N and around 1000 ft to the north. Low cloud cover is all over the Beaufort. Surface temperature is around 0 °C and moist, around 90% relative humidity.
Update [10:00AM, Fri. Jun. 7, 2019 PST]:
The cyclone is now centered slightly west of 155 °W around 72 °N. Visibility is still good and ceiling is high. Because the cyclone is almost right over the flight path, it is windy south of 72 °N and north of 75 °N, and relatively calmer in between. Low cloud cover is all over the Beaufort. Surface temperature is around 0 °C and moist, around 90% relative humidity.
Update [14:20PM, Thur. Jun. 6, 2019 PST]:
A cyclone centered at 170 °W. Visibility is over 5 miles at most places and ceiling is above 1000 ft north of 72.6 °N and slight lower than 1000 ft to the south. The surface is warm, around 0 °C and high relative humidity, around 90%. Surface winds around 10 m/s near 72 °N and weaker north of 74 °N. At 10000 ft, the winds are stronger, westerly near the coast and southerly to the north along 150 °W. Cloudy with a narrow strip of low clouds over 150 °W from the coast to 74 °N. In general, the boundary layer is cool and, and moderately deep, with strong temperature inversion at 600 m south of 72 °N.
2019-06-12 13PM Alaska LT |
2019-06-12 13PM Alaska LT |
 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 |
 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 |
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