The Impact of Extreme Weather: Insights from the EM Morning Brief

A powerful coast-to-coast storm continues to traverse the eastern United States, bringing with it a myriad of severe weather conditions. The National Weather Service has issued flood watches and river flood warnings for western Washington and northwest Oregon, while high winds affect the Northern Rockies and High Plains. As we delve into the specifics of this storm’s impact, we will also discuss the emergence of lake effect snow and the potential for flash freeze slick spots downwind of the Great Lakes. Furthermore, wind advisories are in effect for parts of the Mid Atlantic as the cold front advances offshore. We will also address seismic activity, noting several small to moderate earthquakes recorded off the coast of Alaska without significant damage reported. Join us as we explore these weather phenomena and their implications for various states across the nation. The latest briefing commences with a comprehensive overview of the meteorological conditions affecting the United States on December 19th, 2025. A formidable coast-to-coast storm is currently traversing the nation, prompting the National Weather Service (NWS) to issue flood watches and river flood warnings across western Washington and northwest Oregon. In addition, high winds are impacting the Northern Rockies and the High Plains, creating perilous travel conditions and potential hazards for local populations. Furthermore, the Great Lakes region is experiencing lake effect snow and flash freeze conditions, leading to dangerous slick spots that may exacerbate the challenges faced by commuters.

Takeaways:

* Today, a powerful coast to coast storm continues to move eastward across the nation, bringing severe weather.

* The National Weather Service has issued flood watches and river flood warnings for western Washington and northwest Oregon.

* High wind warnings have been issued for the Pribilof Islands with gusts reaching 75-80 mph, creating hazardous conditions.

* Dense fog is present in California’s Central Valley, reducing visibility significantly and causing travel delays.

* In Michigan, winter weather advisories remain in effect, predicting additional lake effect snow along the Lake Michigan shore.

* Oregon faces ongoing flood warnings as an atmospheric river approaches, increasing the risk of landslides and flooding.

Sources

[NWS Anchorage overview & warnings | https://www.weather.gov/afc]

[NWS AFC High Wind pages | https://www.weather.gov/afc/HighWindWarningPribilofs , https://www.weather.gov/afc/HighWindBeringStormReview]

[NWS Hanford — Dense Fog Advisory & hazards | https://www.weather.gov/hnx/]

[Caltrans QuickMap travel info | https://quickmap.dot.ca.gov]

[NWS Baltimore/Washington — Wind Advisory & HWO | https://www.weather.gov/lwx/ https://forecast.weather.gov/showsigwx.php?warnzone=MDZ013&product1=Wind+Advisory]

[Washington Post Capital Weather Gang live updates | https://www.washingtonpost.com/weather/2025/12/19/dc-weather-live-updates-stormy-windy/]

[NWS Grand Rapids advisory summary | https://www.weather.gov/wwamap/wwatxtget.php?cwa=grr&wwa=all]

[NWS Detroit/Pontiac HWO & gales | https://forecast.weather.gov/product.php?issuedby=DTX&product=HWO&site=NWS , https://www.weather.gov/dtx/]

[FEMA—Branch County flood maps meeting | https://www.fema.gov/press-release/branch-county-residents-invited-review-flood-maps]

[NWS Billings hazards | https://www.weather.gov/byz/]

[NWS statewide wind hazards page | https://www.weather.gov/byz/montana_statewide_information]

[NWS Buffalo advisories & marine gales | https://forecast.weather.gov/showsigwx.php?warnzone=PAZ001&product1=Lake+Effect+Snow+Warning, https://www.weather.gov/buf/BUFHWOBUF]

[WBEN/Audacy local briefing | https://www.audacy.com/wben/news/weather/strong-winds-falling-temps-and-rain-transitions-to-snow]

[NWS Portland—flood warnings & watches | https://forecast.weather.gov/showsigwx.php?product1=Flood+Warning&warnzone=ORZ111 https://www.weather.gov/pqr/]

[OPB regional forecast update | https://www.opb.org/article/2025/12/18/atmospheric-river-flooding-oregon-washington-weather-forecast/]

[NWS Seattle—Flood Warnings/Watch text | https://www.weather.gov/wwamap/wwatxtget.php?cwa=sew&wwa=all]

[NWS Seattle office dashboard | https://www.weather.gov/sew/]

[NWS Cheyenne—High Wind Warning text & local page | https://forecast.weather.gov/wwamap/wwatxtget.php?cwa=cys&wwa=high+wind+warning , https://forecast.weather.gov/MapClick.php?textField1=41.1454&textField2=-104.792]

[Cowboy State Daily regional brief | https://cowboystatedaily.com/2025/12/18/don-days-wyoming-weather-forecast-friday-december-19-2025/]

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