Instrument issues at the weather station in Pago Pago (related to Hydrogen generation) means that balloon launches occur only once every other day, at 0000 UTC on odd days. The sounding for 15 April/0000 UTC (1 PM Samoa Standard time on 14 April) is shown below.Two different JPSS satellites overflew... Read More
GOES-18 True Color imagery during the day on 7 April, above, shows the development of a standing wave downwind of the elevated topography on the Aleutian peninsula between King Salmon and Perryville. (Note also the faint signal of volcanic ash as discussed here) What atmospheric conditions support the development of... Read More
A large severe weather outbreak took place across the south central United States on Wednesday 2 April 2025. The NWS Storm Prediction Center (SPC) anticipated a significant weather event in the region, having predicted an enhanced risk of severe weather as early as Monday 31 March and a rare high risk the night before the event.... Read More
Staffing issues at a number of WFOs has lately meant gaps in the launching of soundings, either at 0000 UTC or at 1200 UTC. Satellite profiles derived from the GFS model and nudged towards ABI observations are available in AWIPS, and these products can fill in some of that missing... Read More
