Infrared imagery over the Hawai’ian Islands on 25/26 October, below, shows convective development over Maui and Oahu. This was also a region of strong vertical wind shear, as shown below, as upper level cloud features were moving southeastward, low level clouds were moving to the west).GREMLIN is a machine-learning tool... Read More

MIMIC TPW fields for the first half of 22 October (at which point the data feed from NOAA/NESDIS was interrupted) shows the Samoan Islands within an isolated region of relatively dry air with moisture moving in from the east. GFS fields showing the Galvez Davison Index (GDI) that is sometimes... Read More

GOES-18 Visible imagery, above, over the Samoan Islands, shows a variety of cloud structures moving from north to south over the Samoan Islands, especially over the smaller islands of American Samoa (Tutuila, Ofu/Olosega and Ta’u). The animation below, covering about the same time span, shows GREMLIN radar estimates. GREMLIN is... Read More

Tropical Cyclone’s Debby slow progress up the east coast of the US (Blog Post) resulted in a prolonged rain event. The slider above compares the Susquehanna River on 1 August (a clear day before Debby) and on 13 August, after the inundation. The turbidity of the river, and its discharge into Chesapeake... Read More