Citazione Originariamente Scritto da Aragorth Visualizza Messaggio
An area of disturbed weather developed east of the Mariana Islands on October 31, and moved west-northwestward over the next week without any increase in organization due to an unfavorable environment. The disturbance began to increase in organization on November 6 after encountering more favorable conditions, and the Japan Meteorological Agency declared it a tropical depression on November 8. The Joint Typhoon Warning Center issued a Tropical Cyclone Formation Alert on the system later that day, and PAGASA named the system Tropical Depression Queenie shortly after. The JTWC classified it as Tropical Depression 23W early on November 9. According to the JTWC, lack of equatorial outflow prevented rapid intensification of the system. Later that day at 12 p.m. UTC, the JMA upgraded it to a tropical storm named it Chebi, which means swallow in Korean. The JTWC and PAGASA both followed suit later that day. Early on November 10, the JMA upgraded Chebi to a severe tropical storm as it continued to move west towards the Philippines, following a similar track as Typhoon Cimaron earlier in the season. Just hours later, the JMA upgraded Chebi from severe tropical storm with 10-minute sustained winds of 55 knots to a typhoon with winds of 95 knots, with a pressure decrease of 40 hPa over three hours. The JTWC followed suit, upping Chebi from a tropical storm with 1-minute sustained winds of 55 knots to a Category 4-equivalent typhoon at 9 a.m. UTC. PAGASA rose Public Storm Warning Signal 3 in some provinces as the storm rapidly deepened and moved closer to Luzon.

Now that is insane!!

Jesus, 40 hPa in three hours?????? That's really a hell of decreasing.....