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Emilia (05E) Weakens From Category 4 Hurricane to Tropical Storm

14.3N 130.3W

July 14th, 2012 Category: Tropical Storms

Tropical Storm Emilia – July 12th, 2012

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Track of 05E - July 13th, 2012 © Univ. of Wisconsin

Track of TS 05E

Emilia (05E) reached hurricane status early on July 9 and began to rapidly intensify into a Category 3 hurricane as the eastern outflow channel from Daniel (04E) that had previously inhibited development weakened and allowed Emilia to ventilate its core in all directions.

Early on July 10, Emilia reached its peak intensity as a Category 4 hurricane with sustained winds of 140 mph and a barometric pressure of 945 mbar. After its peak, Emilia began to fluctuate between a strong Category 2 hurricane and a weak Category 3 hurricane. Although the storm was over cool waters, it was able to maintain this intensity because of its annular structure.

However, late on July 12, the eye disappeared from satellite imagery and the storm weakened to a Category 1 hurricane. Early the next morning, it was observed that Emilia passed just north of Daniel’s path days earlier, which was a hostile environment. In response to this, the storm dropped to below hurricane status.

As of 8 p.m. PDT July 13 (0300 UTC July 14), Tropical Storm Emilia is located within 20 nautical miles of 15.5°N 128.6°W, about 1320 mi (2125 km) west-southwest of the southern tip of Baja California. Maximum sustained winds are 45 knots (50 mph, 85 km/h), with stronger gusts. Minimum central pressure is 998 mbar (hPa; 29.47 InHg), and the system is moving west at 13 kt (15 mph, 24 km/h). Tropical storm force winds extend outward up to 60 miles (95 km) from the center of Emilia.

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