December 2017 North American winter storm
The storm in the Southern United States set numerous snowfall records across Texas, Louisiana, and Mississippi, while also causing extensive damage to power infrastructure and property.Snow accumulated across parts of the Florida panhandle, with flurries being reported as far south as Miramar Beach, Destin, and Pensacola.[3] The front then intensified, which caused temperatures across the region to further decrease into the 4–10 °C (39–50 °F) range and resulted in the cooling of the atmosphere by December 7.[3][4] On the same day, a separate cold front progressed across the southern Great Plains and the Southeastern United States.[5][6] A low-pressure area developed in the Gulf of Mexico along a frontal boundary, and moved northeastward towards the Big Bend region in Florida.[5] As the low moved across the Southeastern United States on December 9, another low-pressure area developed along a surface front off the Carolina coast.[5] The second low tracked northward, producing snowfall across the Mid-Atlantic and the Northeastern United States, before moving inland across Nova Scotia on December 10.[10][14][15] The winter storm left more than 185,000 power outages across businesses and homes while producing record snowfall across several areas across the region.[16] A study from the Regional Science Policy and Practice found tweets on then-Twitter (now X) increased four-fold from the week prior to the winter storm to during it.[24] Flights were delayed at Austin–Bergstrom International Airport,[30] where 3.3 cm (1.3 in) of snow fell, the first snowfall in December since 1948,[29] and nearly 63,000 power outages occurred across Texas.[25][34] A trace of snow fell in New Orleans,[14][35] as the state experienced freezing temperatures, causing ice to form, and resulted in seven casualties.[44] A motorcycle restriction was implemented on the Lake Pontchartrain Causeway bridge,[45] and in Catahoula Parish, property damage amounted to $10,000.[46][47] Winter storm warnings were issued for numerous counties in Mississippi as more than 15 cm (5.9 in) fell across southwestern parts of the state.[56][69] In preparation for the winter storm, several businesses, schools, and government offices in North Carolina were closed.[89] A squall line developed along a cold front that moved through western and southern parts of the state,[90] producing high wind gusts and causing $50,000 in property damage.[118] Severe weather and high winds in Switzerland uprooted trees, some of which obstructed roads, and caused property damage in Baselland.[118] Fallen trees blocked transit lines in Bruderholz [de], and many calls were made to Baselland public safety for assistance.
Mid-AtlanticSoutheastRegional Snowfall IndexMount MitchellSouthernNortheastern United States2017–18 North American winterThe Weather ChannelFree University of Berlinlow-pressure areaGulf of MexicoBig BendAlabamaNorth CarolinaEast Coast of the United StatesNova Scotiathe MaritimesAtlantic OceanLouisianaMississippiFlorida panhandleMiramar BeachDestinPensacolasquall linecold frontNew York CityGreat PlainsSoutheastern United Stateswintry mixtroughmoistureFloridafrontogenesisGeorgiasurface frontCarolinaNewfoundland and LabradorNational Oceanic and Atmospheric AdministrationRegional Science Policy and PracticetweetsTwitterSpace Center HoustonInterstate 410San AntonioInterstate 10Interstate 610Interstate 45Interstate 69AustinHoustonBrownsvilleCorpus ChristiBeaumontPort ArthurLaredoAustin–Bergstrom International Airporthypothermiawind chillsNational Weather ServiceLake Charleswinter weather advisoryLafayetteBaton RougeNew OrleansKentwoodCatahoula ParishJonesvilleSt. HelenaSt. TammanyTangipahoaWashingtoncurfewLake Pontchartrain CausewayWinter storm warningsJacksonMeridianCleburneRandolphSt. Clair CountyRaglandInterstate 65Shelby CountyCaleraBirminghamMobileBirmingham–Shuttlesworth International AirportLangford ParkwayAtlantaMetro AtlantaAtlanta International AirportDelta Air LinesBlue Ridge ParkwayNorth Carolina Highway 128Mount Mitchell State ParkAsheville MallAsheville OutletsWake Forest High SchoolMallard Creek High SchoolScotland High SchoolHarding University High SchoolRoy CooperInterstate 40Burke CountyTriangle ExpresswayInterstate 540Interstate 26Asheville Regional AirportAshevilleAmerican Red CrossEscambia County, FloridaMolinoU.S. Route 29McDavidCenturySt. PetersburgSouth PasadenaTampa International AirportStorm Prediction Centerfunnel cloudMiami-Dade CountyGreenville, South CarolinaBlacksburg, VirginiaBaltimoreBaltimore Department of TransportationBaltimore County