MIMIC Total Precipitable Water (TPW) fields, above, from 0000 UTC on 14 April through 1200 UTC on 17 April show a stagnation in flow in/around the Samoan Islands, starting around 0600 UTC on 16 April. This occurs as a storm develops northwest of New Zealand and a strong push of dryer air moves Equatorward to... Read More
Himawari-9 Airmass RGB imagery, below, from 0000 on 4 April through 1200 UTC on 6 April 2023 (created using geo2grid) show a transition from a deep tropical airmass (deep green in the RGB with embedded clouds that are white) over the southern Marianas islands to one that is a bit dryer (more... 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
Portland OR had a snowfall of 5.3″ on 22 February 2023, a record for the date. (Update! The snow on 22 February ended up being 10.8″, the second snowiest day of record!) The GOES-18 Clean Window Infrared (10.3) imagery animation, above, taken from the CSPP Geosphere site (direct link to animation) shows the system responsible... Read More
