Sentinel-1A’s overpass over the Gulf of Tehuantepec shortly after 0000 UTC on 13 December, shown above in a toggle with topography, corresponded with the beginning of an event of strong winds (colloquially called a “Tehuantepecker”) cause by funneling of wind through the Chivela Pass in the Sierra Madre mountains. At... Read More

National Weather Service Pago Pago Facebook posts on 11 December describe an atmosphere primed for heavy rain and lightning, the latter Facebook also shown below. Band 13 animation, above, shows persistent deep convection over the Samoan Islands. The convection develops and drifts southward.MIMIC Total Precipitable Water over the south Pacific shows... Read More

Hourly GOES-West imagery from the CSPP Geosphere site, above (direct link to animation), shows the development of a broad Kona Low over the Hawai’ian islands. MIMIC Total Precipitable Water (TPW) fields over the eastern Pacific, below, show a very moist airmass moving into the eastern Hawai’ian islands as the Kona low develops to the west. The OSPO Percent of Normal fields at 1200... Read More

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... Read More