Images of MIMIC Total Precipitable Water, above, show moist air emerging from the Intertropical Convergence Zone and streaming north over the western islands of Hawaii.GOES-West water vapor imagery (the rocking animation, above) shows the circulation north of the Hawaiian islands that is drawing moisture northward. Because the water vapor channel on the Imager... Read More

Water vapor imagery from Monday 4 April 2011 over the Gulf of Alaska shows the development of what appears to be Kelvin-Helmholtz instability, an instability that occurs in regions of strong shear. In this case, the shear zone occurs within a gradient of moisture along the edge of a polar... Read More

Tropical Storm Igor has formed in the far eastern Atlantic, just south of the Cape Verde Islands. GOES-12 imagery from today (above) shows a sheared system with persistent and abundant convection southwest of a low-level swirl of clouds. (That low-level swirl is most evident in the 1145 UTC image). Igor formed just... Read More

Morphed Microwave Imagery (MIMIC), above, shows the evolution of the structure of Earl’s eye over the past 48 hours as Earl has strengthened from a Category 3 storm back to Category 4.An AWIPS view of NOAA-16 AVHRR imagery (0.63 and 10.8 micron data, including ocean buoy reports) from just... Read More