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The rule affected only those aircraft operating under IFR when in level flight above 3,000 ft above mean sea level, or above the appropriate transition altitude, whichever is the higher, and when below FL195 (19,500 ft above the 1013.2 hPa datum in the UK, or with the altimeter set according to the system published by the competent authority in ...
The JTWC analyzed Mangkhut to have reached Category 5-equivalent intensity by 06:00 UTC, an intensity it would maintain for nearly four days. [16] The JMA assessed that the typhoon's central pressure bottomed out at 18:00 UTC, with 10-minute sustained winds of 205 km/h (125 mph) and a central minimum pressure of 905 hPa (mbar; 26.73 inHg).
[nb 1] At 1800 UTC, the JTWC assessed Sally to have peaked in strength with maximum sustained winds of 260 km/h (160 mph), equivalent to that of a Category 5 tropical cyclone on the Saffir–Simpson hurricane wind scale. [1] The JMA estimated the storm's minimum pressure at the time to be at 950 mbar (950 hPa; 28 inHg). [3]
On July 16, a Hurricane Hunter aircraft found a weak surface circulation and minimum sea level pressure of 1006 mbar (29.7 inHg). Initially, the low- and mid-level circulations were not vertically stacked, with the low-level center exposed from the deep convection. By 00:00 UTC on July 17, the surface center and the deep convection moved closer ...
Following Hurricane Hunter reports, which indicated winds of 65 km/h (40 mph) and a barometric pressure of 999 mbar (29.5 inHg). [6] [nb 3] Based on this, the JTWC upgraded the depression into a tropical storm and named it Nancy. Initially, the JTWC expected the system to track northwards and eventually re-curve, but this did not occur.
Typhoon Songda was the sixth most intense tropical cyclone of the Northwest Pacific Ocean in 2016. Also known as the Ides of October storm, it struck the Pacific Northwest region of the United States and Canada as a powerful extratropical cyclone. [1]
The cyclone then rapidly intensified into a Category 5 super typhoon with 1-minute sustained winds of 280 km/h (175 mph) on May 2, with the JMA estimating a minimum central pressure of 890 mb (hPa; 26.28 inHg), [9] although the JTWC estimated a slightly higher pressure of 895 mbar (hPa; 26.43 inHg), while noting a compact eye 10 nautical miles ...
[8] [9] The JTWC subsequently reported that the system had peaked with 1-minute sustained winds of 120 km/h (75 mph), which made it equivalent to a Category 1 hurricane on the SSHWS. [9] During that day the system started to move towards the west-south-west and made landfall on the northern Espiritu Santo .