Daniel Swain

ARkStorm Fears Recede in California Despite Flooding; Anomalous Lack of Rain-Shadowing Explained by Weather West

Fears of an impending ARkStorm in California have receded, although much of the state has been receiving prodigious amounts of rainfall and the forecast remains wet for the next 10 days. In the most recent storm, the heaviest rains have fallen in the Santa Barbara and Ventura areas, northwest of Los Angeles. The map posted below shows total precipitation amounts of up to 14 inches in a 24-hour period; other reports indicate that a few areas have received more than 18 inches. As would be expected, floods and mudslides have hit the region, causing considerable damage and taking… – Read More

Should California Be Bracing for a Possible ARkStorm?

The storm currently hitting California has not produced as much precipitation as was anticipated, irritating some Weather West readers (see yesterday’s post) while reducing flood concerns for the present. But the forecast remains extremely wet over the next week and beyond. As the maps posted below show, rain in the lowlands and snow in the mountains could fall in prodigious quantities, which would probably cause extensive flooding (note the 256 inches of snow over roughly two weeks forecasted on one of the maps posted below). If the current seven-day forecast verifies, and if the wet pattern remains entrenched… – Read More

The Weather West Blog Community and the Possible End of the Great California Drought

One of my favorite blogs is Weather West: California Weather and Climate Perspectives, run by meteorologist Daniel Swain. Posting once or twice a month, Swain focuses on current and upcoming weather events and conditions. He delves into meteorological complexities but writes in an accessible manner that can be easily understood by non-specialists. More important for the concerns of GeoCurrents, Swain’s posts are always illustrated with informative and often striking maps. For those who appreciate the aesthetic properties of cartography, it can be difficult to beat meteorological mapping. I often find