Cyclone Nargis

May 2nd, 2008 |

AVHRR false color images (Animated GIF)

Category 4 intensity Cyclone Nargis made landfall across southern Myanmar (formerly known as Burma) late in the day on 02 May 2008, packing maximum winds around 135 mph (60 m s-1), producing a storm surge of 12 feet (3.6 meters), and dumping nearly 20 inches (51 cm) of rainfall. According to media reports, the estimated death toll from this powerful tropical cyclone ranges from 22,000 to nearly 100,000. AVHRR false color images from 01 and 02 May (above, viewed using Google Earth) showed Cyclone Nargis in the Bay of Bengal, moving eastward toward Myanmar.

An animation of the Morphed Integrated Microwave Imagery at CIMSS (MIMIC) product (below) revealed evidence of a double eyewall, suggesting that Cyclone Nargis was going through an eyewall replacement cycle just prior to and near the time of landfall.

MIMIC morphed microwave imagery (Animated GIF)

The “Huckabee Fire” in southwest Texas

May 2nd, 2008 |

GOES-12 visible + shortwave IR images (Animated GIF)

GOES-12 RGB composite images (above, using the visible and 3.9 µm shortwave IR channels) revealed a cluster of “hot spots” (red-enhanced pixels) and a large smoke plume drifting east/northeastward from a large grass fire located about 30 miles southeast of Fort Stockton, Texas on 01 May 2008. This fire — known as the Huckabee Fire — started on 30 April (due to a downed power line), and eventually ended up burning over 96,000 acres. This large and very hot fire saturated the 3.9 µm shortwave IR detectors on GOES-12, with the imagery indicating a maximum IR brightness temperature of 337.4º K (64.3º C or 147.7º F).

AWIPS images of the GOES-12 3.9 µm shortwave IR channel (below) showed that the Huckabee fire continued to burn into the morning hours of 02 May, as a cold front moved southward across the region — the cooler air behind the cold frontal boundary was evident as lighter shades of gray surging southward, while warmer, more humid air appeared as darker shades of gray moving slowly northward across eastern Texas into Oklahoma (in advance of the approaching cold front).

GOES-12 3.9µm IR images (Animated GIF)

An AWIPS 4-panel comparison of MODIS and GOES-12 “shortwave IR” and “IR window” channel data (below) showed the cluster of hot pixels around 09 UTC (4 am local time) on 02 May. This large fire was so hot that a “hot spot” was even apparent on the IR window channel images — surprisingly, the brightness temperature of the hot spot on the GOES-12 IR window image was higher (as indicated by the single yellow-enhanced pixel in the lower right panel) than on the corresponding MODIS IR window image (the cluster of black pixels in the upper right panel).

MODIS + GOES-12 IR images