AWIPS images of the 4-km resolution GOES-13 11-3.9 µm brightness temperature difference (BTD) or “legacy fog/stratus product” (above; click image to play animation) began to display a signal of increasing coverage of fog and/or stratus across parts of the Allegheny Plateau region of New York and Pennsylvania during the pre-dawn... Read More

250-meter resolution Terra and Aqua MODIS true-color Red/Green/Blue (RGB) images from the SSEC MODIS Today site (above) revealed the presence of an undular bore along the leading edge of a southward-moving cold front (also known regionally as a “pneumonia front“) on Read More

Regular readers of this blog will be quick to recognize the GOES imagery above as a low cloud detection product that exploits the differences in emissivity properties for water droplets that exist between 3.9 and 10.7 µm, two radiation bands that are detected on the GOES imager. The emissivity differences... Read More

AWIPS images of the GOES-13 fog/stratus product (above; click image to play animation) did not do a particularly good job of depicting a well-defined signal of the fog/stratus that was in place across parts of the Ohio River Valley region on 17 February... Read More