Ouch... Cyclone Ian strikes the Polynesian islands

Fiji Meteorological Services

Tropical Cyclone Advisory #24

SEVERE TROPICAL CYCLONE IAN, CATEGORY FOUR (07F)

12:00 PM FST January 11 2014

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At 0:00 AM UTC, Severe Tropical Cyclone Ian (938 hPa) located at 19.5S 174.4W has 10 minute sustained winds of 105 knots. Position good based on hourly multispectral enhanced infrared imagery and peripheral surface reports. The cyclone is reported as moving south southeast at 8 knots.

Hurricane Force Winds

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15 NM of the center

Storm Force Winds

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30 NM of the center

Gale Force Winds

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60 NM of the center

Eye well defined on infrared only discernible on visible imagery. Eye warming and cloud tops cooling in past 6 hours. IAN lies in a low sheared environment just south of an upper ridge. Outflow enhanced to the south by jet stream located on the downstream side of the approaching upper trough. Sea surface temperature is around 28C. System is moving south southeastward on the southern periphery of the near-equatorial ridge to the north of the system.

Dvorak analysis based on eye pattern with warming eye in LG surround embedded in W yielding DT=6.0, MET=6.5, and PT=6.0. Final Dvorak intensity based on DT.

Dvorak Intensity: T6.0/6.0/D1.0/24 HRS

Global models agree on a south southeastward movement with gradual weakening.

Forecast and Intensity

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12 HRS 20.9S 173.7W - 90 knots (CAT 4)

24 HRS 22.5S 173.2W - 65 knots (CAT 3)

48 HRS 25.9S 172.3W - 50 knots (CAT 2)

Tropical Cyclone Watches/Warning for Tonga Island

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A Hurricane Warning remains in force for the Va'vau group and Ha'apai group

A Gale Warning remains in force for the Tongatapu group

A Strong Wind Warning remains in force for the rest of Tonga Island

For those who don't understand what the text above is talking about...

Cyclone Ian-Category Four hurricane equivalent storm

10 min avg. sustained winds of 105 knots, 120mph

which translates to about avg. 1 min winds of 135mph

Central pressure: 938 millibars

This storm struck Tonga with winds around 105 mph, uprooting trees and damaging houses.

It is a very small storm, with hurricane winds extending only about 20 miles from the center and gale force winds extending only 70 miles from the center. In contrast, hurricane Irene had tropical storm force winds over a 500 mile swath.

Ian making landfall on an island in the South Pacific 1/10/14

Ian at night 1/10-1/11/14