Factual Information 2015:1.7 Meteorological Information/1.7.2/1.7.2.1
This page contains an extract from the Factual Information released on 8 March 2015
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- Summary
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Summary
1.7.2.1 Forecast charts
a) Significant Weather Chart (SIGWX)
The SIGWX PGCE05 EGRR 061800 issued by World Area Forecast Centre (WAFC) London Fixed Time Prognostic Chart ICAO Area G SIGWX for flight level from 25,000 to 63,000 ft. (FL250-630) valid 1800 UTC, 07 March 2014 showed that the filed flight plan route (red dotted line – Figure. 1.7E below) passed through a westerly jet stream with wind speed of up to 150 kt. at latitude 30o N at flight level 39,000 ft. (FL390). Another westerly jet stream with wind speed of up to 100 kt. at flight level 31,000 ft. (FL310) at the destination (Figure 1.7E). Light clear air turbulence (CAT) might be expected from 25o N onwards to the destination. However, no significant adverse weather phenomena was expected for the whole planned flight route.
b) The wind and temperature forecast chart
The wind and temperature forecast chart at flight level 34,000 ft. (FL340) PWGE25 valid 1800 UTC, 07 March 2014 issued by WAFC Washington showed the jet stream as in the significant weather chart above. The forecast winds at the last civil radar point and last air defence radar point were below 20 kt., (Figure 1.7F below).
Reference
Factual Information MH370/01/15
Notes
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