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Articles by Tropical Cyclones
Philippines: Over 9.5 Million Affected By Recent Southwest Monsoon, Tropical Cyclones
Philippines: Over 9.5 Million Affected By Recent Southwest Monsoon, Tropical Cyclones 2025-08-09 04:15:51 (MENAFN- Khaleej Times) More than nine million people in the Philippines have been affected by the combined impact of the Southwest Monsoon (Habagat) and tropical cyclones Crising, Dante, and Emong, according to the National Disaster Risk Reduction and Management Council (NDRRMC) on Saturday (August 9).
Case Study Storm Surge Produced by Tropical Cyclone Gavin in Fiji March
A fine illustration of the effects of storm surge on sea flooding is provided by the example of Vanua Levu island in Fiji during Tropical Cyclone Gavin in early March 1997 (Terry and Raj 1999). TC Gavin, lasting from 3 to 11 March, was the first cyclone to strike the Fiji Islands in the 1997 hot season (Fig. 5.23), and was the severest storm to affect the nation since the early 1990s (Fiji Meteorological Service 1997b).
Wind Strength - Tropical Cyclones - Brian Williams
Wind strength is the main parameter used for describing the intensity of a tropical cyclone (Table 5.2), to complement readings of low barometric pressure at the storm centre. The strength of the winds is determined from the average wind speed, referred to as the sustained wind speed. Sustained winds are recorded over 10-min averaging times, above ground level in an open and flat space.
Failure Trigger Mechanisms
A trigger mechanism is a discrete, identifiable event or influence that initiates slope failure. Tropical cyclones and earthquakes are both very effective trigger mechanisms. Tropical cyclones are able to provide the necessary trigger for slope failure in two different ways. First, dynamic loads are increased through the violent swaying of tall trees during cyclone-force winds, because stresses are transferred to the slope materials by agitation of the root networks.
Coastal Deposition Reefedge Megablocks
The erosional damage by powerful cyclone-generated waves and swells on the seaward margins of coral reefs produces huge quantities of sedimentary debris. The dimensions of some of this debris can be truly spectacular, in the form of massive blocks of limestone ripped from the reef front and then hurled onto the perimeter of the reef platform.
Numbers Timing and Seasonality
Climatic control of the frequency of tropical cyclones remains poorly understood at the global scale. This means that it is still a mystery why the total number of tropical cyclones, hurricanes and typhoons that develop over the world's oceans each year is about 80 (Table 4.1), or indeed why this number is not much greater or much less (Emanuel 2004).
Cloud Patterns - Tropical Cyclones - Brian Williams
The area of clouds associated with tropical cyclones is much larger than the region influenced by strong winds. This is because the strong winds reflect the area characterised by the steep atmospheric pressure gradient, whereas the clouds form wherever there is convection associated with the cyclone system, driven by the expanse of warm sea-surface temperatures.
Shape and Size - Tropical Cyclones - Brian Williams
Atmospheric pressure at sea level at the centre of a tropical cyclone is frequently as low as 965 mb. Away from the centre the pressure increases to about 1,020 mb at a storm's outer edge. This spatial variation in atmospheric pressure at sea level means that one way of examining the shape and size of a tropical cyclone (as with other types of weather systems) is to observe the arrangement of isobars on a synoptic weather chart.
Wind Distribution
Figure 5.7 demonstrates a simplified horizontal distribution of wind strengths within an idealised and stationary tropical cyclone that has reached hurricane intensity. One of the most remarkable features of tropical cyclones compared to other types of storms is that the strongest winds are felt just outside the central eye, which by comparison is a zone of almost complete calm. Farther away from the central zone of hurricane-force winds, the winds decrease in strength.
The Southeast Trade Winds
Most of the western region of the tropical South Pacific benefits from the Southeast Trade Winds. These are produced by the effect of Coriolis deflection on surface air drawn towards the low pressure region at the Equator, called the Equatorial Trough. The Coriolis deflection of winds, which is to the left in the Southern Hemisphere, is caused by the Earth's rotation.
Wind Direction - Tropical Cyclones - Brian Williams
Winds drawn in towards the centre of a tropical cyclone do not trace the circular or elliptical shape of the isobars shown on synoptic weather charts, but instead follow spiral streamlines (Fig. 5.11). The angle of deviation of wind bearing from the isobar can be measured, and varies from 20° to 40°, depending on the distance from the storm centre. Localised influences interfere with the general pattern of streamlines.
Mature Stage - Tropical Cyclones - Brian Williams
As the converging air spirals inwards, it becomes organised into bands of cloud that rotate slowly clockwise around the storm centre. The spiral bands of cloud are known as feeder bands because they feed heat and moisture into the central low pressure. This is essential for the continuing development of the cyclone, by providing energy into the storm system.
Storm Surge and Sea Flooding Wind and Pressure Components
Widespread sea flooding by storm surge around the coastlines of South Pacific islands is a serious hazard during tropical cyclones. For example, on 25 February 2005, Tropical Cyclone Percy, a hurricane-intensity system with sustained winds up to 249 km h-1, had a severe impact on the atoll nation of Tokelau (Fig. 5.14). Tokelau consists of three atolls: Fakaofo, Nukunonu and Atafu. The storm surge generated by TC Percy inundated all three atolls.
CIMSS Satellite Blog
Tropical Storm Alex June 5th, 2022 | Scott Bachmeier 1-minute Mesoscale Domain Sector GOES-16 (GOES-East) “Clean” Infrared Window (10.35 µm) and “Red” Visible (0.64 µm) images (above) showed Tropical Storm Alex after it reached tropical storm intensity at 0900 UTC on 05 June 2022. Overshooting tops within the deep convection exhibited infrared brightness temperatures of -80ºC or colder (shades of violet).
Cyclone Batsirai reaches Category 4 intensity
Cyclone Batsirai reaches Category 4 intensity February 3rd, 2022 | Scott Bachmeier EWS-G1 Infrared Window (10.7 µm) images [click to play animated GIF | MP4] US Space Force EWS-G1 (formerly GOES-13) Infrared Window (10.7 µm) images (above) showed Cyclone Batsirai in the South Indian Ocean — just north of the island nations of Mauritius and Réunion — during the time period it was classified as a Category 4 intensity storm (00 UTC on 02 February to 15 UTC on 03 February 2022).
Tropical Storm Wanda
Tropical Storm Wanda November 2nd, 2021 | Scott Lindstrom GOES-16 Band 2 Visible (0.64) Imagery, 1250 -1740 UTC on 2 November 2021 CSPP GeoSphere imagery, above, (click for a direct link to the animation above in CSPP Geosphere; it will remain there for about 2 weeks before the data are overwritten) shows the evolution of Tropical Storm Wanda on 2 November 2021. Convection developed near the storm center and wrapped about halfway around the center. Dry air is also affecting this storm.
“Adrift” 1983 Hurricane (Raymond)
GOES-6 GOES-6 was NOAA‘s operational satellite during the 1983 Hurricane Raymond, which was a Cat 4. This incredibly powerful storm was made famous in the 1998 book “Red Sky in Mourning: A True Story of Love, Loss, and Survival at Sea” written by Tami Oldham Ashcraft with Susea McGearhart, and also by the 2018 movie “Adrift”. “[October 12, 1983]… About 1000 the seas arched into skyscrapers, looming over our boat.
30-year anniversary of the landfall of Hurricane Hugo
30-year anniversary of the landfall of Hurricane Hugo September 22nd, 2019 | Scott Bachmeier GOES-7 Infrared Window (11.25 µm) images [click to play animation | MP4] GOES-7 Infrared Window (11.25 µm) images (above) showed Hurricane Hugo as it made landfall as a Category 4 storm around 04 UTC on 22 September 1989. This GOES-7 data was accessed from the SSEC Satellite Data Services archive.
Tropical Storm Bill in the Atlantic Ocean
Tropical Storm Bill in the Atlantic Ocean June 15th, 2021 | Scott Lindstrom GOES-16 True-Color imagery showing Tropical Depression #2 over the western Atlantic Ocean, 2001 – 2331 UTC on 14 June 2021 (Click to animate) True-color imagery derived from GOES-16, above, shows a low-level cyclonic circulation associated with then Tropical Depression #2 to the east of Cape Hatteras over the western Tropical Atlantic.
Cyclone Tauktae in the Arabian Sea
Cyclone Tauktae in the Arabian Sea May 16th, 2021 | Scott Bachmeier US Space Force EWS-G1 Infrared (10.7 µm) images [click to play animation | MP4] US Space Force EWS-G1 Infrared (10.7 µm) images (above) showed Cyclone Tauktae in the Arabian Sea (just off the west coast of India) as it intensified from a Category 1 to a Category 3 storm on 16 May 2021.
Subtropical storm in the South Pacific
Subtropical storm in the South Pacific May 27th, 2021 | Scott Bachmeier GOES-17 “Red” Visible (0.64 um) images [click to play animation | MP4] GOES-17 (GOES-West) “Red” Visible (0.64 um) images (above) showed the development of a subtropical storm in the South Pacific Ocean (just northeast of New Zealand) on 27 May 2021. Surface analyses from the New Zealand Met Service are available here.
Tropical Depression over the western Pacific
Tropical Depression over the western Pacific April 13th, 2021 | Scott Lindstrom Himwari-8 Clean Window (10.41 µm) Band 13 Infrared imagery, 1220 – 2050 UTC on 13 April 2021 (Click to animate) Himawari-8 Window Channel infrared imagery (10.41 µm), above, shows a well-defined tropical disturbance (Tropical Depression #2, if named it will become Surigae) moving between Yap and Palau in the western Pacific to the southwest of Guam.
Cyclone Habana in the South Indian Ocean
Cyclone Habana in the South Indian Ocean March 10th, 2021 | Scott Bachmeier US Space Force EWS-G1 Infrared Window (10.7 µm) images [click to play animation | MP4] US Space Force EWS-G1 Infrared Window (10.7 µm) images (above) displayed the well-defined eye and eyewall structure of Cyclone Habana in the South Indian Ocean on 10 March 2021. Habana reached Category 4 intensity for the second time at 0900 UTC (ADT | SATCON).
The Study Area - Tropical Cyclones - Brian Williams
L SUin^v Solomon SvIslands Tuvalu Tokelau Wallis and Equator Papua New Nauru L SUin^v Solomon SvIslands Tuvalu Tokelau Wallis and Coral Vanuatu*'! American Cook Sea Fiji .. Samoa Islands Caledonia km 2000 New V Zealand Equator French Polynesia South Pacific Ocean Fig. 1.1. The South Pacific Islands. Conveniently, most of the study area falls under the responsibility of the Fiji Meteorological Service (FMS) for recording and archiving tropical cyclone activity.
Strong Winds Wind Effects
It is the steep barometric pressure gradient established between a tropical cyclone's outer edge and its central low that causes strong winds to blow inwards. Violent winds are one of the most dangerous and costly aspects of cyclones for people living on Pacific islands (Table 5.1). Strong winds have a number of effects. They generate large waves at sea and drive these onshore, damaging coral reefs and causing severe coastal erosion.
Goni in the South China Sea
Goni in the South China Sea November 2nd, 2020 | Scott Lindstrom Himawari-8 Target (every 2.5 minutes) Infrared (10.41 µm) and visible (0.64 µm) Imagery, 0122 to 1352 UTC on 2 November 2020 (Click to animate) Typhoon Goni hit the Phillipines as a major typhoon on 31 October. Since then, an increase in shear and the topography of Luzon have both weakened the storm significantly.
CIMSS Satellite Blog
Hurricane Epsilon October 21st, 2020 | Scott Bachmeier GOES-16 “Red” Visible (0.64 µm) and “Clean” Infrared Window (10.35 µm) images [click to play animation | MP4] Hurricane Epsilon underwent rapid intensification (ADT | SATCON) on 21 October 2020 — and 1-minute Mesoscale Domain Sector GOES-16 (GOES-East) “Red” Visible (0.64 µm) and “Clean” Infrared Window (10.35 µm) images (above) showed Epsilon as it intensified from a Category 1 to a Category 3 storm.
Tropical Storm Epsilon in the Atlantic
Tropical Storm Epsilon in the Atlantic October 19th, 2020 | Scott Bachmeier GOES-16 “Red” Visible (0.64 µm) and “Clean” Infrared Window (10.35 µm) images [click to play animation | MP4] 1-minute Mesoscale Domain Sector GOES-16 (GOES-East) “Red” Visible (0.64 µm) and “Clean” Infrared Window (10.35 µm) images (above) showed Tropical Depression 27 as further intensified to become Tropical Storm Epsilon at 15 UTC on 19 October 2020.
Category 4 Hurricane Laura makes landfall in Louisiana
Category 4 Hurricane Laura makes landfall in Louisiana August 27th, 2020 | Scott Bachmeier GOES-16 “Red” Visible (0.64 µm) and “Clean” Infrared Window (10.35 µm) images (with and without an overlay of GLM Flash Extent Density) [click to play animation | MP4] 1-minute Mesoscale Domain Sector GOES-16 (GOES-East) “Red” Visible (0.64 µm) and “Clean” Infrared Window (10.35 µm) images — with and without an overlay of GLM Flash Extent Density (above) showed Category 4 Hurricane Laura as it made...
Hurricane Genevieve in the East Pacific Ocean
Hurricane Genevieve in the East Pacific Ocean August 18th, 2020 | Scott Bachmeier GOES-16 “Red” Visible (0.64 µm) and “Clean” Infrared Window (10.35 µm) images [click to play animation | MP4] 1-minute Mesoscale Domain Sector GOES-16 (GOES-East) “Red” Visible (0.64 µm) and “Clean” Infrared Window (10.35 µm) images (above) displayed the well-defined eye of Category 4 Hurricane Genevieve in the East Pacific Ocean (off the west coast of Mexico) on 18 August 2020.
Hurricane Douglas moves just north of Hawai’i
Hurricane Douglas moves just north of Hawai’i July 26th, 2020 | Scott Bachmeier GOES-17 “Red” Visible (0.64 µm) and “Clean” Infrared Window (10.35 µm) images [click to play animation | MP4] 1-minute Mesoscale Domain Sector GOES-17 (GOES-West) “Red” Visible (0.64 µm) and “Clean” Infrared Window (10.35 µm) images (above) showed Category 1 Hurricane Douglas as it moved just north of Hawai’i during the day on 26 July 2020 (the boundary of the Mesoscale Sector was abruptly shifted westward at 1658...
Tropical Storm Cristobal makes landfall along the coast of Louisiana
Tropical Storm Cristobal makes landfall along the coast of Louisiana June 7th, 2020 | Scott Bachmeier GOES-16 “Red” Visible (0.64 µm) images [click to play animation | MP4] 1-minute Mesoscale Domain Sector GOES-16 “Red” Visible (0.64 µm) images (above) revealed low-level vortices that were pivoting around the analyzed center of Tropical Storm Cristobal as it approached the coast of Louisiana on 07 June 2020, making landfall at 2200 UTC.
Typhoon Kammuri in the West Pacific Ocean
Typhoon Kammuri in the West Pacific Ocean November 30th, 2019 | Scott Bachmeier Himawari-8 “Clean” Infrared Window (10.4 µm) images [click to play animation | MP4] 2.5-minute interval JMA Himawari-8 AHI “Clean” Infrared Window (10.4 µm) images (above) showed a large canopy of cold cloud-top infrared brightness temperatures (BTs) associated with Category 1 Typhoon Kammuri in the West Pacific Ocean on 30 November 2019.
CIMSS Satellite Blog
Stereoscopic views of severe convection over Nebraska June 8th, 2020 | Scott Lindstrom GOES-16 (left) and GOES-17 (right) Band 2 (0.64 µm) Visible imagery, 2140 UTC on 8 June 2020 through 0130 UTC 9 June 2020 Strong convection developed over Nebraska late in the afternoon of June 8th (SPC Storm reports are here). Mesoscale domains from both GOES-16 and GOES-17 viewed this developing convection, enabling fine spatial and temporal-scale viewing of the convection.
Cyclone Fani makes landfall in India
Cyclone Fani makes landfall in India May 3rd, 2019 | Scott Bachmeier EUMETSAT Meteosat-8 Infrared Window (10.8 µm) images [click to play animation | MP4] EUMETSAT Meteosat-8 Infrared Window (10.8 µm) images (above) showed the intensification of Cyclone Fani to a high-end Category 4 storm on 02 May 2019 (ADT | SATCON), before eventually making landfall in northeastern India on 03 May.
Tropical Cyclone Veronica north of Australia
Suomi NPP VIIRS Day/Night Band (0.7 µm) and Infrared Window (11.45 µm) images at 1716 UTC [click to enlarge] A toggle between Suomi NPP VIIRS Day/Night Band (0.7 µm) and Infrared Window (11.45 µm) images (above) showed Category 4 Cyclone Veronica off the northern coast of Western Australia at 1716 UTC on 21 March 2019. Ample illumination from a Full Moon maximized the “visible image at night” capability of the Day/Night Band.
Cyclone Idai makes landfall in Mozambique
Cyclone Idai makes landfall in Mozambique March 14th, 2019 | Scott Bachmeier Meteosat-8 Infrared Window (10.8 µm) and DMSP-17 SSMIS Microwave (85 GHz) images of Cyclone Idai at 1630 UTC [click to enlarge] Cyclone Idai — which had been slowly intensifying over warm water within the Mozambique Channel since 09 March — made landfall as a Category 2 storm along the coast of Mozambique on 14 March 2019.
CIMSS Satellite Blog
GOES-16 (GOES-East) “Clean” Infrared Window ( 10.3 µm ) imagesshowed Willa during the 48 hours that it rapidly intensified ( ADT SATCON ) from a Tropical Storm at 15 UTC on 20 October to a Category 5 Hurricane at 15 UTC on 22 October 2018. Willa — which became the third Category 5 hurricane of the 2018 season in the northeast Pacific basin (east of 180º longitude) — formed and had been moving over very warm water, with Sea Surface Temperatures of 29-30ºC.
Jelawat May Become the First Typhoon of 2018, But Isn't a Land Threat in the Western Pacific Ocean
Here's another first of 2018, reminding us hurricane season is approaching. Tropical Storm Jelawat may become the first typhoon of 2018 in the western Pacific Ocean, but won't pose a threat to land. First classified as a tropical depression last Saturday, Jelawat is currently centered over 500 miles northwest of Guam.
Hurricane Harvey makes landfall
* GOES-16 data posted on this page are preliminary, non-operational and are undergoing testing * As Hurricane Harvey moved across warm waters in the northwestern Gulf of Mexico (SST | OHC), it continued to intensify (ADT | SATCON) to a Category 4 hurricane just before making landfall (which occurred around 03 UTC on 26 August 2017, or 10 pm local time on 25 August).
Mum Told She Was Going To Die Is Saved By Ex-Husband's Wife
A woman who was told she was going to die was saved by her ex-husband's new wife. Nicola Hitchen was told by doctors that there was nothing they could do to treat her stage four cervical cancer four months ago. But Nicola has vowed not to give up and thanks to a massive fundraising effort organised by Clare Hichen - her ex-husband's new wife - has flown to Turkey to undergo pioneering chemotherapy.
Super Typoon Lan in the West Pacific
A plot of the Advanced Dvorak Technique for Typhoon Lanshowed that the tropical cyclone underwent a period of rapid intensification during the 00-12 UTC period on 20 October 2017. A 24-hour animation of Himawari-8 rapid-scan (2.5 minute interval) Infrared Window (10.4 µm) images (below) revealed the development of a very large eye during the 20 October/06 UTC to 21 October/06 UTC period.
Super Typhoon Haima (Lawin) Reaches Category 5 Strength; Targets Northern Philippines
Story Highlights Haima, known as Lawin in the Philippines, has rapidly intensified in the western Pacific Ocean. It will push into northern Luzon, Philippines, as an intense typhoon overnight Wednesday night, local time. Haima will then push into southeast China as a weaker typhoon Friday.
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