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Short Range Public Discussion
 
(Caution: Version displayed is not the latest version. - Issued 0753Z Dec 01, 2022)
 
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Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 253 AM EST Thu Dec 01 2022 Valid 12Z Thu Dec 01 2022 - 12Z Sat Dec 03 2022 ...Heavy snow for parts of the Northern/Central Rockies and the Sierra Nevada Mountains on Thursday... ...Lake-effect snow downwind from Lakes Erie and Ontario on Thursday... ...There is a Marginal Risk of excessive rainfall for parts of the California Coast and Pacific Northwest on Friday into Saturday morning... On Thursday, a front over the Pacific Northwest and Northern California will move eastward to the Great Lakes to Southern High Plains by Saturday. The system will produce snow over parts of the Pacific Northwest/Great Basin and heavy snow over parts of the Northern/Central Rockies and the Sierra Nevada Mountains. The snow will result in reduced visibility and hazardous driving conditions. In addition, moisture will stream onshore over parts of Central/Southern California, producing moderate to heavy rain over the region. Therefore, the WPC has issued a Marginal Risk of excessive rainfall over parts of the Central/Southern California Coast through Friday morning. The associated heavy rain will create localized areas of flash flooding, affecting areas that experience rapid runoff and burn scars. On Friday, the snow will end over most of the Northwest, California, and the Great Basin. However, more moisture moves into the Pacific Northwest and parts of Northern California as snow returns to the Olympic Peninsula and parts of the Northern Cascades into Saturday morning. The snow will result in reduced visibility and hazardous driving conditions. Moreover, the plume of moisture will produce moderate to heavy rain over parts of the Pacific Northwest Coast into Northern California. Therefore, the WPC has issued a Marginal Risk of excessive rainfall over parts of the Pacific Northwest Coast into Northern California Coast from Friday through Saturday morning. The associated heavy rain will create localized areas of flash flooding, affecting areas that experience rapid runoff and burn scars. Furthermore, a plume of moisture continues over parts of Southern California, producing moderate to heavy rain. Therefore, the WPC has issued a Marginal Risk of excessive rainfall over parts of the Southern California Coast from Friday through Saturday morning. The associated heavy rain will create localized areas of flash flooding, affecting areas that experience rapid runoff and burn scars. Also, on Thursday, upper-level energy moving over the Lower Great Lakes into the Northeast will aid in triggering lake-effect snow downwind from Lakes Erie and Ontario. The snow has prompted Lake-Effect Snow Warnings and Winter Weather Advisories over the impacted areas. The snow will result in reduced visibility and hazardous driving conditions. Meanwhile, as the storm moves out of the Rockies, snow develops over parts of the Northern Plains on Friday. Overnight Friday, the snow moves into the Upper Mississippi Valley and the Upper Great Lakes. The snow will result in reduced visibility and hazardous driving conditions. Overnight Thursday, moisture starts to move northward over the Southern Plains into the Upper Midwest. On Thursday night, rain with embedded thunderstorms develops over parts of the Western Gulf Coast, moving into parts of the Lower Mississippi Valley on Friday. Overnight Friday, rain also develops over parts of the Lower/Middle Mississippi Valley and the Ohio Valley/Great Lakes, which expands into parts of the Northeast/Mid-Atlantic by Saturday morning. In addition, the rain changes over to snow over parts of the Western Ohio Valley and Great Lakes. The snow will result in reduced visibility and hazardous driving conditions. Ziegenfelder Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php