An historic snowfall event (SPC watches and warnings) impacted parts of the Gulf Coast region of the US on 04 December 2009 — this event produced the earliest snowfall on record at both Houston, Texas and Lake Charles, Louisiana, and total snowfall amounts were as high as 5.0 inches in Mississippi, 4.0 inches in Texas, and 3.0 inches... Read More

Under normal conditions of westerly flow aloft, one might expect to see occasional standing waves to the east of the Sierra Nevada mountain range; however, due to the presence of a strong cut-off low over the southwestern US, the winds aloft over Nevada and California were from the northeast on 29... Read More

A McIDAS image of the NOAA-18 10.8 µm IR channel (above) showed a region of very cold surface temperatures (darker blue to violet color enhancement) over the interior of Alaska on 19 November 2009, especially in the vicinity of Chandalar Lake (station identifier PALR) and Anuktuvuk Pass (station identifier PAKP).... Read More

CIMSS has been distributing MODIS imagery and products in AWIPS (via LDM subscription) since 2006 — and we are now in the process of testing and evaluating AVHRR imagery and products for distribution to NWS forecast offices via a similar process. Let’s now utilize a few of these MODIS and AVHRR products to interrogate snow... Read More