Cyclone Nivar makes landfall in India

November 25th, 2020 |

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 [click to play animation | MP4]

US Space Force EWS-G1 Infrared (10.7 µm) images (above) showed Category 1 Cyclone Nivar making landfall along the southeastern coast of India on 25 November 2020.

EUMETSAT Meteosat-8 Infrared Window (10.8 µm) images with contours of deep-layer wind shear from the CIMSS Tropical Cyclones site (below) indicated that Nivar was moving through an environment of low shear (and over warm water) — factors favorable for the storm maintaining its intensity.

Meteosat-8 Infrared Window (10.8 µm) images, with contours of deep-layer wind shear [click to enlarge]

Meteosat-8 Infrared Window (10.8 µm) images, with contours of deep-layer wind shear [click to enlarge]

Posted in EWS-G1, Meteosat, Satellite winds, Tropical cyclones | No Comments »

Cyclone Gati makes landfall in Somalia

November 22nd, 2020 |

EWS-G1 Visible (0.63 µm) images [click to play animation | MP4]

EWS-G1 Visible (0.63 µm) images [click to play animation | MP4]

US Space Force EWS-G1 Visible (0.63 µm) images (above) showed Category 2 Cyclone Gati as it made landfall along the east coast of Somalia on 22 November 2020. The tropical cyclone rapidly intensified (ADT | SATCON) as it moved westward across the North Indian Ocean (through a corridor of low wind shear).

EWS-G1 Infrared Window (10.7 µm) images (below) revealed cloud-top infrared brightness temperatures in the -70 to -80ºC range as the eye was forming after 02 UTC. The eye of Gati opened quickly, but then collapsed and became cloud-filled shortly before landfall. It bears mentioning that in the historical record there are no tropical cyclones of Hurricane intensity making landfall in Somalia.

EWS-G1 Infrared Window (10.7 µm) images [click to play animation | MP4]

EWS-G1 Infrared Window (10.7 µm) images [click to play animation | MP4]


EWS-G1 Water Vapor (6.5 µm) images (below) also showed the apparent merger of 2 convective clusters — in addition to their brief Fujiwhara-type rotation — prior to Gati’s intensification and the formation of an eye.

Posted in EWS-G1, Tropical cyclones | No Comments »

Imagery from the EWS-G1 — U.S. Space Force

November 18th, 2020 |

EWS-G1 (Electro-optical Infrared Weather System Geostationary) is a U.S. Space Force mission. Images are now available on the UW/SSEC geo-browser. Full Disk images are obtained every 30 minutes. An EWS-G1 “quick-guide (pdf)”.

The five spectral bands of the EWS-G1 Imager.

The above animation shows the 5 spectral bands on the EWS-G1 imager. There is one visible band and four infrared bands.

This multi-panel image shows all the 5 bands at one given time (and showing full disk images).

Animation of the visible (band 1) from EWS-G1.
Animation of the EWS-G1 water vapor band (3).
Animation of EWS-G1 band 4, longwave infrared window.

A loop of all five spectral bands.

A day-time visible band animation over Madagascar.
A composite image with EWS-G1, GOES-17 and GOES-16 data. Credit: UW/SSEC Satellite Data Services.

The EWS-G1 was formerly NOAA’s GOES-13. Contact the UW/SSEC Satellite Data Services for information of data access / subscription, if more than the posted near realtime imagery are needed.

Posted in EWS-G1, General interpretation, GOES-13 | No Comments »