Tropical Storm Akara develops off the southeast coast of Brazil
CIMSS Satellite Blog » Tropical Hurricanes
by Scott Bachmeier
1M ago
GOES-16 True Color RGB images on 18 February [click to play MP4 animation] GOES-16 True Color RGB images (above) showed multiple mesoscale vortices embedded within the exposed Low-Level Circulation Center (LLCC) of a Tropical Depression off the southeast coast of Brazil on 18 February 2024. This disturbance continued to organize and gradually intensify during the day and into the evening hours, becoming Tropical Storm Akara at 0000 UTC on 19 February. A 6-day animation of the MIMIC Total Precipitable Water product — from 13-18 February (below) — showed that Akara first began to develop along ..read more
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Ongoing tropical activity in the SPCZ near American Samoa
CIMSS Satellite Blog » Tropical Hurricanes
by Scott Lindstrom
1M ago
MIMIC Total Precipitable Water fields, 1900 UTC 5 February – 1800 UTC 6 February 2024 (Click to enlarge) As tropical storm Nat moves away from the Samoan Islands and towards Tahiti, another Invest area, 98P, has developed north of the Samoan Islands. The animation above, from the MIMIC Total Precipitable Water site (link), shows a cyclonically-rotating concentration of moisture just north of Samoa, and moving east-southeastward toward Olosega and Ta’u. The Tropical Cyclone Formation Alert (TCFA) graphic (click here for text explanation) from the Joint Typhoon Warning Center (link), below, move ..read more
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Tropical Cyclone Nat in the South Pacific Ocean
CIMSS Satellite Blog » Tropical Hurricanes
by Scott Lindstrom
1M ago
GOES-178 Clean Window (Band 13, 10.3 µm) infrared imagery, hourly from 2000 UTC on 4 February 2024 – 1500 UTC on 5 February 2024 (Click to enlarge) Abundant convection over the southern Pacific Ocean has organized into a tropical cyclone (named Nat) as the system moved to the east of the Samoan Islands. GOES-18 infrared imagery, above, shows the strong convection that developed just east of Olosega; by 0700 UTC on 5 February 2024, very cold cloud tops (brightness temperatures cooler than -90oC) appeared near 14oS, 165oW (shown here) as the system moved steadily to the east. The tropical cyclon ..read more
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Tropical Cyclone Kirrily in the Coral Sea
CIMSS Satellite Blog » Tropical Hurricanes
by Scott Bachmeier
2M ago
2.5-minute JMA Himawari-9 Red Visible (0.64 µm, top) and Clean Infrared Window (10.4 µm, bottom) images, from 2102 UTC on 23 January to 0742 UTC on 24 January [click to play animated GIF | MP4] Target Sector (2.5-minute interval) JMA Himawari-9 AHI Red Visible (0.64 µm) and Clean Infrared Window (10.4 µm) images (above) showed Invest 90P as it intensified to become Tropical Cyclone Kirrily over the Coral Sea on 23-24 January 2024. Visible images showed multiple exposed low-level circulation centers, while Infrared images showed that deep convection was mainly de ..read more
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2023 GOES Away
CIMSS Satellite Blog » Tropical Hurricanes
by Tim Schmit
3M ago
A selection of several GOES ABI loops during 2022 showcased the diverse range of features observed, which included volcanic ash plumes, hurricanes, convection, fog, smoke, fires, dust and ice. It’s very hard to choose just one event from every month of the year, but the goal here is to show a variety of phenomena and locations that NOAA‘s GOES ABI routinely monitors, in this case during 2023. Most loops generated are from the University of Wisconsin-Madison CIMSS Satellite Blog, which is linked to in the titles at the top of each monthly entry. Imagery from GOES-16 and -18 is showcased, along ..read more
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Wet weather continues in Samoa
CIMSS Satellite Blog » Tropical Hurricanes
by Scott Lindstrom
3M ago
MIMIC Total Preciptable Water (TPW) Fields (from this site), below, for the 24 hours ending 1300 UTC on 26 December 2023, show the Samoan Islands (at 13-14oS, ~172oW) in the middle of the South Pacific Convergence Zone (SPCZ) that stretches east-southeastward across the South Pacific. Pago Pago has received more than 20″ of rain in December so far, with 2.36″ falling on Christmas Day. (Average rainfall in December is near 15″). Total Precipitable Water values, 1400 UTC 25 December – 1300 UTC 26 December 2023 (Click to enlarge) Rain on Christmas Day was supported by strong low-level convergence ..read more
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Cyclone Jasper makes landfall in Australia
CIMSS Satellite Blog » Tropical Hurricanes
by Scott Bachmeier
3M ago
2.5-minute JMA Himawari-9 Red Visible (0.64 µm, top) and Clean Infrared Window (10.4 µm, bottom) images, from 2002 UTC on 12 December to 0822 UTC on 13 December [click to play animated GIF | MP4] Target Sector (2.5-minute interval) JMA Himawari-9 AHI Red Visible (0.64 µm) and Clean Infrared Window (10.4 µm) images (above) showed the brief development of a ragged eye with Cyclone Jasper as the storm approached the coast of Far North Queensland, Australia — prior to it making landfall north of Cairns around 1200 UTC on 13 December 2023. In Synthetic Aperture Radar (SAR) win ..read more
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Cyclone Jasper in the Coral Sea
CIMSS Satellite Blog » Tropical Hurricanes
by Scott Bachmeier
4M ago
JMA Himawari-9 Clean Infrared Window (10.4 µm) images, from 0002 UTC on 07 December to 0602 UTC on 08 December [click to play animated GIF | MP4] Target Sector (2.5-minute interval) JMA Himawari-9 AHI Clean Infrared Window (10.4 µm) images (above) showed the gradual development of a ragged eye with Cyclone Jasper as the storm moved southward across the Coral Sea on 07 December 2023. Intermittent convective bursts within the eyewall contained a few overshooting tops that exhibited infrared brightness temperatures around -90ºC (yellow pixels embedded within dark p ..read more
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Tropical Cyclone Michuang affects Andhra Pradesh
CIMSS Satellite Blog » Tropical Hurricanes
by Alexa Ross
4M ago
Tropical Cyclone Michuang has formed in the Indian Ocean. Michuang, which means strength or resilience, is situated in the Bay of Bengal on 2023-12-04. Michuang’s center is currently about 48 km from the east coast of the Indian subcontinent. But the bands of the system have already caused major storm surges in the states of Andhra Pradesh and Tamil Nadu. In cities such as Chennai, India, schools are closing and air travel has been put on a pause. Two fatalities are associated with the flooding and high winds. Thousands have been asked to evacuate. The storm is forecast to make landfall on 202 ..read more
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Satellite-based estimates of wind over Tropical Storm Mal on 14 November
CIMSS Satellite Blog » Tropical Hurricanes
by Scott Lindstrom
4M ago
Advanced Scatterometer (ASCAT) observations near Fiji, 0933 and 1013 UTC on 14 November 2023 (Click to enlarge) Metop-B and Metop-C both overflew Tropical Storm Mal as it approached the island of Fiji on 14 November. The toggle above shows the two wind plots from this website, MetopC from 0933 UTC and MetopB from 1013 UTC. The two swaths show the center of the storm moving southeast, skirting the main islands of Fiji. A shortcoming of ASCAT winds in tropical cyclones occurs when winds exceed 40 knots; the wind (and rain) perturbs the ocean surface sufficiently at those speeds to change the bac ..read more
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