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Hurricane Hilary (09E) Off Coast of Mexico

19.6N 113.6W

September 30th, 2011 Category: Tropical Cyclones

Hurricane Hilary (09E) - September 25th, 2011

Enhanced image

Track of TS 09E  - September 30th, 2011 © Univ. of Wisconsin

Track of TS 09E

The main and enhanced images offer a view of Hilary (09E) a few days ago, while still at hurricane stregnth. The animated imagery shows the recent track of the system, which has been downgraded to a tropical storm.

As of 2 p.m. PDT (2100 UTC) September 29, Tropical Storm Hilary is located within 15 nautical miles of 21.6°N 120.7°W, about 695 mi (1120 km) west 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 1000 mbar (hPa; 29.53 InHg), and the system is moving north-northwest at 8 kt (9 mph, 15 km/h). Tropical storm force winds extend outward up to 175 miles (280 km) from the center of Hilary.

The system began on September 18, as a broad area of low pressure associated with minimal shower and thunderstorm activity that began to show signs of organization, while located several hundred miles to the south-southeast of the Gulf of Tehuantepec.

Moving towards the west, and west-northwest, the disturbance gained enough organization early on September 21 to be declared as a tropical depression, the ninth of the season. Continuing to organize, the depression strengthened into a tropical storm several hours later.

On September 22, the meteorologists declared Hilary as a Category 1 hurricane, becoming the seventh of the season. On September 22, it rapidly strengthened into a small, Category 4 hurricane, featuring a well-defined eye and very deep convection.

The storm’s outer bands produced heavy rainfall over Chipas and Tabasco, with accumulations in Tabasco reaching 8.58 in (218 mm) in 24 hours. Several rivers across the region overflowed their banks and flooded nearby areas. In Villahermosa heavy rain collapsed drains and many streets were flooded. In addition, cars were stranded in floodwaters. Across Colima, waves reached 9 to 15 ft (2.7 to 4.6 m).

 

Very Intense Hurricane Hilary (09E) Moving Away from Southwestern Coast of Mexico

17.2N 105.9W

September 23rd, 2011 Category: Tropical Cyclones

Hurricane Hilary (09E) - September 23rd, 2011

Enhanced image

Track of TS 09E  - September 23rd, 2011 © Univ. of Wisconsin

Track of TS 09E

At 2:00 PM PDT (2100 UTC), the eye of Hurricane Hilary (09E)  was located near latitude 16.3 north, longitude 103.1 west. Hilary is moving toward the west near 8 mph (13 km/h) and this motion is expected to continue for the next two days.

On the forecast track, the core of Hilary should continue to move farther offshore of the southwestern coast of Mexico today. Maximum sustained winds remain near 145 mph (230 km/h) with higher gusts. Hilary is a category four hurricane on the Saffir-Simpson hurricane wind scale. The cyclone is expected to remain a major hurricane during the next two days.

Hurricane force winds extend outward up to 30 miles (45 km) from the center, and tropical storm force winds extend outward up to 85 miles (140 km). Estimated minimum central pressure is 942 mb (27.82 inches).

Hazards affecting land include rainfall and surf. Hilary is expected to produce additional rainfall amounts of 1 to 3 inches along the coasts of Gguerrero and Michoacan in southern Mexico. Swells generated by Hilary are affecting portions of the coast of southwestern Mexico. These swells are likely causing life-threatening surf and rip current conditions.

Tropical Storm Hilary (09E) Expected to Become Hurricane

17.1N 101.6W

September 22nd, 2011 Category: Tropical Storms

Tropical Storm Hilary (09E) - September 21st, 2011

Enhanced image

Track of TS 09E  - September 21st, 2011 © Univ. of Wisconsin

Track of TS 09E

At 8:00 PM PDT (0300 UTC) the center of Tropical Storm Hilary (09E) was located near latitude 14.4 north, longitude 97.2 west.

Hilary is moving toward the west-northwest near 7 mph (11 km/h) and this general motion is expected to continue during the next 24 to 48 hours.

On the forecast track the core of Hilary will continue to move parallel to the southwest coast of Mexico but any deviation to the north of the track could bring stronger winds to the coast.

Maximum sustained winds are near 50 mph (85 km/h) with higher gusts. Strengthening is forecast during the next 48 hours and Hilary is expected to become a hurricane late tomorrow. Tropical storm force winds extend outward up to 50 miles (85 km) from the center. Estimated minimum central pressure is 1000 mb (29.53 inches).

Hazards affecting land include wind and rainfall. Heavy squalls are probably occurring along portions of the southern coast of Mexico already. However, winds of tropical storm force should begin to affect a portion of the coast soon, and should spread westward along the tropical storm warning area during the next 24 to 36 hours. Hilary is expected to produce rainfall amounts of 3 to 5 inches across portions of southern Mexico with isolated amounts of 10 inches possible.

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