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19 Feb 2016 description

SITUATION

• TC WINSTON is currently moving towards west. On 18 February at 6.00 UTC it had max. sustained winds of 176 km/h and its center was located approx. 275 km northwest of Niue and 300 km northeast of Vava'u islands (Tonga).

01 Jan 2016 description

[JTWC] Summary: TROPICAL CYCLONE (TC) 06P (ULA), LOCATED APPROXIMATELY 301 NM SOUTHWEST OF PAGO PAGO, HAS TRACKED WESTWARD AT 12 KNOTS OVER THE PAST SIX HOURS. ANIMATED INFRARED SATELLITE IMAGERY DEPICTS AN EMBEDDED CENTER FEATURE THAT HAS EVOLVED INTO A WEAK EYE FEATURE. THE CURRENT POSITION IS PLACED WITH GOOD CONFIDENCE BASED ON TIGHTLY CURVED BANDING SEEN IN A 011718Z SSMIS 91GHZ MICROWAVE IMAGE. THE CURRENT INTENSITY HAS DROPPED TO 75 KNOTS BASED ON CURRENT INTENSITY ESTIMATES OF T4.5 (77 KNOTS) FROM PGTW AND KNES.

01 Jan 2016 description

[JTWC] Summary: TROPICAL CYCLONE (TC) 06P (ULA), LOCATED APPROXIMATELY 190 NM SOUTH-SOUTHWEST OF PAGO PAGO, AMERICAN SAMOA HAS TRACKED SOUTHWESTWARD AT 12 KNOTS OVER THE PAST SIX HOURS. ANIMATED MULTISPECTRAL SATELLITE IMAGERY DEPICTS A SLIGHTLY ELONGATED CENTRAL DENSE OVERCAST FEATURE OBSCURING THE LOW LEVEL CIRCULATION CENTER. THE CURRENT POSITION IS PLACED WITH FAIR CONFIDENCE BASED ON LOW REFLECTIVITY BANDING SEEN IN A 010623Z SSMIS 91GHZ MICROWAVE IMAGE AND IS SUPPORTED BY AGENCY SATELLITE FIXES.

31 Dec 2015 description

[JTWC] Summary: TROPICAL CYCLONE 06P (ULA), LOCATED APPROXIMATELY 118 NM SOUTH-SOUTHEAST OF PAGO PAGO, HAS TRACKED SOUTHWESTWARD AT 05 KNOTS OVER THE PAST SIX HOURS. THE CURRENT POSITION IS BASED ON SATELLITE FIXES FROM PGTW AND KNES, WITH HIGH CONFIDENCE. THE INTENSITY OF 90 KNOTS IS CONSISTENT WITH DVORAK T-NUMBER ESTIMATES FROM PGTW AND KNES. TC 06P HAS RAPIDLY INTENSIFIED OVER THE PAST 12 HOURS, SUPPORTED BY LOW VERTICAL WIND SHEAR, STRONG POLEWARD OUTFLOW ALOFT, AND PASSAGE OVER VERY WARM WATER.

31 Dec 2015 description

PDC is closely monitoring Tropical Cyclone Ula as it approaches Vava’u, Tonga. Attached are three situational awareness products depicting Estimated Tropical Cyclone Wind Impacts, Rainfall, and Wind Radii for this event, which are also available as layers in DisasterAWARE. If you would like to view these models in real time in DisasterAWARE, please access the Hazard event through the link below and expand the “Default Layers” folder in the product list. You may also search “TAOS” or “Radii” in the “Layers” palette.

31 Dec 2015 description

PDC is closely monitoring Tropical Cyclone Ula as it approaches Vava’u, Tonga. Attached are three situational awareness products depicting Estimated Tropical Cyclone Wind Impacts, Rainfall, and Wind Radii for this event, which are also available as layers in DisasterAWARE. If you would like to view these models in real time in DisasterAWARE, please access the Hazard event through the link below and expand the “Default Layers” folder in the product list. You may also search “TAOS” or “Radii” in the “Layers” palette.

31 Dec 2015 description

PDC is closely monitoring Tropical Cyclone Ula as it approaches Vava’u, Tonga. Attached are three situational awareness products depicting Estimated Tropical Cyclone Wind Impacts, Rainfall, and Wind Radii for this event, which are also available as layers in DisasterAWARE. If you would like to view these models in real time in DisasterAWARE, please access the Hazard event through the link below and expand the “Default Layers” folder in the product list. You may also search “TAOS” or “Radii” in the “Layers” palette.

21 Jul 2015 description

Population Density

Using an innovative approach with GIS and remote sensing, the Oak Ridge National Laboratory LandScanTM is the community standard for global population distribution. At approximately 1 km resolution LandScan is the finest resolution global population distribution data available and represents an ambient population (average over 24 hours).

21 Jul 2015 description

Maximum Temperature

Temperatures in the Asia-Pacific region can go very high with central India reaching 50oC or more. The Tibetan plateau rarely exceeds 20oC because of its high elevation.

These temperatures are based on average highs over a period of approximately 50 years. Maximum temperatures in the region may therefore be from different months of the year and a temperature in any given location may exceed these maximums.

21 Jul 2015 description

Köppen-Geiger Climate Classification

The highly referenced climate classification map of Wladimir Köppen was published for the first time in 1900 and updated in its latest version by Rudolf Geiger in 1961.

Climate classification is applied to a broad range of topics in climate and climate change research as well as in physical geography, hydrology, agriculture, biology and educational aspects.

21 Jul 2015 description

The Human Footprint

Human influence on the earth’s land surface is a global driver of ecological processes on the planet, en par with climatic trends, geological forces and astronomical variations. The Wildlife Conservation Society (WCS) and the Center for International Earth Science Information Network (CIESIN) at Columbia University joined together to systematically map and measure the human influence on the earth’s land surface today.

21 Jul 2015 description

Annual Precipitation

This map shows the average amount of precipitation falling in a year, based on approximately 50 years of data. The figures shown do not therefore represent the amount of precipitation that may occur in any given year.

30 Jun 2015 description

OCHA in the Pacific

The Pacific is one of the most disaster-prone regions in the world. Small, vulnerable island states are isolated by vast expanses of ocean. They experience frequent and intense disasters with disproportionately high economic, social and environmental consequences.

In 1999, OCHA established a Regional Office for the Pacific to mobilize and coordinate effective and principled humanitarian action in partnership with national and international actors

30 Jun 2015 description

Elevation and Bathymetry

The region is home to the world's highest mountain, Mount Everest (Sagarmatha in Nepal and Chomolungma in China) at 8,848m, as well as the deepest surveyed point in the oceans,
Challenger Deep in the Marianas Trench at 10,911m.

31 Dec 2014 description

Tectonic Plates and Fault Lines

The region is home to extremes in elevation and the world's most active seismic and volcanic activity. Southwest of India, the Maldives has a maximum height of just 230cm, while far to the north, the Tibetan Plateau averages over 4,500m across its 2.5 million square kilometres and is home to all 14 of the world's peaks above 8,000 metres. The Himalaya were born 70 million years ago when the Arabian Plate collided with the Eurasian plate.