Radar imagery over the island of Hawai’i, below, from 512 – 639 AM HST shows the development of strong thunderstorms over/near Kona. Note that 512 AM HST is 1512 UTC; 639 AM HST is 1639 UTC. The heavy rains led to the issuance of a Flash Flood Warning (link). What... Read More

The storm system named ‘Mocha’ is brewing in the Bay of Bengal and was upgraded to tropical storm status earlier today. Mocha began as a deep depression in in the southeast Bay of Bengal. It is forecasted to continue moving north and gain strength, predicted to become a typhoon within... Read More

1-minute Mesoscale Domain Sector GOES-16 (GOES-East) “Red” Visible (0.64 µm) and “Clean” Infrared Window (10.3 µm) images (above) showed thunderstorms that produced several tornadoes, hail up to 4.00 inches in diameter, wind gusts to 81 mph and heavy rainfall (SPC Storm Reports) across northeast Colorado, northwest Kansas and southwest Nebraska on 10 May 2023.1-minute GOES-16 Infrared images (below) include an overlay of GLM Flash Extent Density — most of... Read More

Tutuila, the large island of American Samoa, experienced very heavy rain early in the morning of 21 March 2023, especially over the western parts of the Island. (However, the raingauge at the Pago Pago airport, in central Tutuila, received only 0.15″ of rain!) The animation above shows the development of... Read More