Moderate southwesterly flow aloft over the Rocky Mountains was aiding in the formation of mountain waves across much of Colorado and parts of the adjacent states on 22 June 2009. AWIPS comparisons of the 1-km resolution MODIS 6.7 µm water vapor image with the corresponding 4-km resolution GOES-12 6.5 µm water vapor image (above) and the 8-km resolution... Read More

A cluster of thunderstorms developed over extreme northeastern Iowa and extreme southeastern Minnesota, and merged into a large Mesoscale Convective System (MCS) across southern Wisconsin during the early hours of 19 June 2009. AWIPS images of the 4-km resolution GOES-12 10.7 µm IR channel (above) displayed the rapid growth of this MCS,... Read More

The first tropical depression of the East Pacific season (Tropical Depression 1E) formed off the southwest coast of Mexico on 18 June 2009 — this was the latest date of the start of the tropical cyclone season in that particular ocean basin since reliable records began in 1970. The previous record for... Read More

A series of volcanic eruptions from Sarychev Peak (located in the central Kiril Islands) began on 10-11 June 2009, and GOES-11 “split window” IR difference images (above) showed a good signature of one of the ash plumes (yellow to cyan color enhancement) as it began to move eastward across the North... Read More