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Category: Winter weather

California’s Record Snowpack and Brimming Reservoirs

A multi-week “parade of storms” over the Pacific Ocean featuring a persistent atmospheric river pattern and numerous winter storms pounding the U.S. west coast has resulted in record snowpack in the Sierra Nevadas with water equivalency at 205% of normal for mid-January in the northern Sierras, 255% central, and... Read More

Widespread fog/stratus over snow cover across the Northern Plains

A sequence of GOES-16 (GOES-East) “Red” Visible (0.64 µm), Day Cloud Phase Distinction RGB and Day Snow-Fog RGB images (above) showed widespread fog/stratus across parts of Montana, North/South Dakota and Minnesota during the day on 06 January 2023. With a quasi-stationary area of high pressure located over that area (surface analyses), winds remained light and the fog/stratus layer was slow... Read More

Thundersnow in the Upper Midwest, and 30-second imagery of severe thunderstorms across the Deep South

GOES-16 (GOES-East) Mid-level Water Vapor (6.9 µm) images with an overlay of GLM Flash Extent Density (above) covered part of a widespread winter storm event — which included thundersnow in parts of Nebraska, Iowa, South Dakota and Minnesota — that occurred on 03 January 2023. Areas that reported thundersnow experienced convectively-enhanced snowfall rates... Read More