| Astro: | December 21 – March 19 |
| Meteo: | December 1 – February 29 |
| Year: | 2023 |
| Rsi Storms: | 2 total |
| First Event Started: | November 21, 2023 |
| Last Event Concluded: | April 6, 2024 |
| Notable Event Name: | January 13–16, 2024 North American winter storm |
| Notable Event Duration: | January 13–16, 2024 |
| Notable Event Pressure: | 983 |
| Notable Event Fatalities: | 30 fatalities |
| Notable Event Damage: | Unknown |
| Fatalities: | 103 |
| Related: | Asian winter, European windstorm season |
The 2023–24 North American winter was the warmest winter on record across the contiguous United States, with below-average snowfall primarily in the Upper Midwest and parts of the Northeastern United States. However, some areas, especially in the states of Pennsylvania, New Jersey and New York saw considerably more snow than the previous winter. Notable winter events were also more prevalent across the eastern half of the country this winter, including a series of winter storms in mid-January that brought snow from the South to Northeast states, a period of very cold temperatures across much of the country in mid-to-late January, and a disruptive nor'easter that affected much of the Mid-Atlantic in mid-February. 2 storms have been rated so far on the Regional Snowfall Index (RSI), although none have attained a "Major" rating (Category 3+). A strong El Niño was expected to influence the winter weather patterns across the continent.
Based on the astronomical definition, winter began at the winter solstice, which occurred on December 21, 2023, and ended at the spring equinox on March 19, 2024.[1] Based on the meteorological definition, the first day of winter started on December 1 and the last day was February 29.[2] However, winter storms may occur outside of these limits.
On October 4, 2023, AccuWeather released their winter prediction. They called for a El Niño; their forecast called for the Southeastern United States and California to be wetter than average, some of which could form severe weather outbreaks. The Midwestern United States was predicted to have higher temperatures and drier conditions than average. AccuWeather notes that cities like Boston, New York City, Philadelphia, and Pittsburgh are expected to have more snowfall than last winter. The predictions for the West Coast were that storms will occur commonly in the winter.[3]
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A winter storm affected Northern New England shortly before U.S. Thanksgiving. Up to 6inches of snow fell in the state of Vermont, with New Hampshire and Maine also recording over 4inches of snow.[4] The snowstorm resulted in 53 car crashes in New Hampshire,[5] with one crash resulting in Interstate 93 shutting down near Littleton. Normal pre-Thanksgiving traffic was expected to be worsened due to the storm.[6] The storm also resulted in 55 flight cancellations.[7] Further south, heavy rain fell in the New York Metropolitan area, with some areas reporting over 3inches.[8] Daily rainfall records were broken on November 22 in Islip, Bridgeport and LaGuardia Airport.[9]
| Rsi: | 0 |
| Max Snow: | 42.7 |
| Duration: | November 26–28, 2023 |
| Fatalities: | 4 |
| Damage: | Unknown |
A winter storm affected much of the Great Plains shortly after U.S. Thanksgiving. Three people were killed in fatal car crashes along Interstate 80 in Nebraska, where 14 crashes occurred and portions of the highway were shut down.[10] The state of Wyoming also responded to 125 car crashes within a 48-hour period.[11] Lander, Wyoming received their snowiest day since 1999 when 19inches of snow piled up.[12] The second snowiest November day was realized in Topeka and Wichita.[13] Interstate 135 was briefly shut down due to the snow, as was Wichita Dwight D. Eisenhower National Airport.[14] Further east, the city of Chicago recorded 1.8inches of snow on November 26.[15] Further east, lake effect snow fell around Lake Erie, which resulted in a fatal car crash in Pennsylvania, a 20-vehicle pileup near Cleveland and Ontario Highway 403 shutting down. The highest snowfall total was 42.7inches in Highmarket, New York.[16]
| Rsi: | 0 |
| Track: | Christmas Day blizzard 2023-12-26 0950Z.jpg |
| Lowest Pressure: | 1003 |
| Max Snow: | 14.6 |
| Duration: | December 25–27, 2023 |
| Fatalities: | 1 |
On Christmas Day, an intensifying low pressure system developing into a blizzard struck the Upper Midwest, dropping more than NaNinches of snow. Spearfish, South Dakota recorded 14.6inches of snow.[17] Whiteout conditions and strong gusty winds were reported in states like Nebraska and North and South Dakota due to the storm.[18] Blizzard warnings were issued for a large part of Nebraska and South Dakota as well as parts of northern Kansas. The system caused many accidents as a result, including jackknifed semis on eastbound Interstate 80 in Nebraska, forcing a portion of that road to close for several hours.[18] Significant closures also occurred on Interstate 90 in South Dakota and Interstate 70 in Colorado.[19] [20] Badlands National Park was closed due to the blizzard. The storm also caused one fatality on icy roads in Kansas.[21]
| Rsi: | 0 |
| Lowest Pressure: | 988 |
| Max Snow: | 18 |
| Duration: | January 6–7, 2024 |
| Damage: | Unknown |
A winter storm, that became a nor'easter, affected the Northeastern United States from January 6–7, 2024. Multiple locations in several states, including New Jersey, Pennsylvania and Connecticut recorded 1feet of snow. 13,000 customers also lost power in Massachusetts.[22] The storm also ended the longest stretch without measurable snow in Harrisburg, Pennsylvania and the longest stretch without 1inches of snow in State College, Pennsylvania.[23] Portions of the Massachusetts Turnpike closed due to snow.[24] In addition, planned construction along the New York Thruway between Orange County and Ulster County was postponed by a week.[25] Despite over 1feet of snow in Port Jervis, New York, the record snow drought in New York City continued, as Central Park only picked up 0.2inches of snow.[26] Boston measured 3.8inches during the snow event, with 5.6inches of snow in Providence, Rhode Island and 10.4inches of snow in Hartford, Connecticut.[27]
From January 8–19, following a pattern change, four consecutive winter storms affected much of the country with rain, snow, blizzard conditions and flooding.
| Rsi: | 2.38 |
| Track: | 01 09 24 Trough.gif |
| Lowest Pressure: | 976 |
| Max Snow: | 21 |
| Duration: | January 8–10, 2024 |
| Fatalities: | 2 |
| Damage: | Unknown |
See main article: January 8–10, 2024 North American storm complex. The first winter storm hit the Midwest, Southeast, and East Coast on January 8–10, 2024.[28] Interstate 70 was closed from Watkins, Colorado to the Kansas state line due to the storm.[29] Winds in Colorado gusted up to 80mph, while winds in New Mexico reached 76mph. Snow drifts in the Oklahoma Panhandle reached NaNfeet due to wind and heavy snowfall.[30] In the Eastern United States, many states had over 40,000 customers lose power, with 130,000 power outages in New York and 90,000 power outages in Pennsylvania.[31] Western New York was hit hard, with winds gusting to 74mph in Dunkirk and 78mph in Watertown;[32] the National Weather Service's Buffalo office warned in an Area Forecast Discussion that gusts from the southeast descending from Tug Hill could reach "potentially generational" levels.[33] Maine experienced the storm as a "sou'easter", with the strongest winds occurring simultaneously with astronomical hide tide, leading to widespread coastal flooding. Gale-force winds occurred along the coast, especially in the Down East region, further contributing to coastal flooding, erosion, and structural damage.[34]
In total, about 1,350 flights were canceled, more than 8,700 more flights were delayed, about two dozen tornadoes were reported, and at least 6 people died because of the storm, with 2 being winter storm related.
| Rsi: | 0 |
| Lowest Pressure: | 981 |
| Max Snow: | 41 |
| Duration: | January 10–13, 2024 |
| Fatalities: | 5 |
| Damage: | Unknown |
The second system, which brought blizzard conditions to some areas, hit most of the U.S. starting on January 10, 2024, sweeping from the Northwest into the Midwest, Great Lakes area, and the East Coast.[35] [36] Almost every U.S. state became under some form of weather alert.[37]
The storm resulted in blizzard warnings for Oregon and Washington's mountain areas for the first time since 2012.[38] Crater Lake National Park closed due to the winter storm.[39] Following the storm, record cold conditions were observed in Washington, with Seattle observing a low of 13F, their coldest temperature since 1990. Ski resorts in on Mount Baker closed due to the cold as well.[40] More than 443,000 customers lost power from Oregon to Michigan, with 111,000 outages in Oregon alone.[41] Portions of Interstate 70 in Kansas were closed due to the winter weather. Moline, Illinois recorded their second snowiest day on record on January 12, with 15.4inches of snow.[42] High tides due to the storm in New York City resulted in parts of Hudson River Park being closed and ferries to the Statue of Liberty being suspended.[43] Coastal Maine was once again, for the second time in 4 days, affected by widespread coastal flooding and gale-force winds, leading to structural destruction and coastal bank erosion. Record tide gauge levels of 14.57 ft were recorded in Portland, causing the 2024 Portland Flood. The storm, combined with the January 9th storm, created an estimated USD $70.3 million in damages for the state of Maine, prompting a major disaster declaration to be declared in the state by President Joe Biden.[44]
Nationwide, over 2000 flights were canceled on January 12 and over another 1000 were canceled on January 13. A state of emergency and travel ban was declared in Western New York, forcing the playoff game between the Pittsburgh Steelers and the Buffalo Bills to be postponed from January 14 at 1pm to January 15 at 4:30pm. In addition, an NHL game between the Toronto Maple Leafs and Detroit Red Wings suffered a 52 minute delay.[45] Portions of Queen Elizabeth Way were also closed.[46] Five people died due to the storm: three in Oregon,[47] one person in California, and one in Wisconsin.[48]
| Rsi: | 1.437 |
| Lowest Pressure: | 983 |
| Max Snow: | 49.5 |
| Duration: | January 13–16, 2024 |
| Fatalities: | 30 |
| Damage: | Unknown |
See main article: January 13–16, 2024 North American winter storm. The winter storm in Oregon resulted in two fatalities, 161,000 customers losing power, and all MAX Light Rail service being suspended for three days.[49] [50] Winds in the Columbia River Gorge reached 80mph, with gusts over 50mph in Portland.[51] Many cities in the Southeastern United States, such as Little Rock, Arkansas and Nashville, Tennessee closed schools.[52] In the Northeastern United States, the storm snapped record long streaks without 1inches of snow in several cities, with a little over 1inches recorded in Atlantic City, 3.3inches of snow in Philadelphia[53] and 4.9inches of snow in Baltimore, with Washington D.C. recording 4.1inches of snow.[54] Central Park reported 1.2inches of snow on January 16, their first inch of snow in a single day since February 13, 2022. The storm total there was 1.6inches.[55]
In total, at least 30 fatalities have been linked to this storm system, including 14 in Tennessee, five in Pennsylvania, three in New York, three in Oregon, and one in Kansas.[56]
Right after the previous storm departed the East Coast, another snowstorm affected the Pacific Northwest, with significant ice in Oregon and parts of Washington. Over 80,000 customers in Oregon lost power. Further east, snow squalls led to numerous pileups in Nebraska.[57] Further east, a state of emergency was declared due to the winter storm in the Philadelphia metropolitan area, resulting in hundreds of schools closing, as well as attractions such as National Constitution Center and Elmwood Park Zoo. The winter storm also resulted in speed restrictions on portions of the New Jersey Turnpike.[58] In total, 4.6inches of snow fell in Philadelphia, with around NaNinches of snow in the Lehigh Valley, up to 6inches of snow in New Jersey and up to 7inches of snow in Delaware.[59] Further south, 4.2inches of snow fell in Baltimore and 3.7inches of snow fell in Washington D.C.[60] The snow in DC led to a ground stop at Ronald Reagan Washington National Airport. Further north, despite a travel advisory in New York City, only 0.4inches of snow fell, with 1.3inches of snow at LaGuardia Airport.[61] [62]
Freezing temperatures affected campaign events leading up to the Iowa Caucuses on January 15, and could affect turnout in the first contest in the 2024 presidential primaries and caucuses.[63] In addition, the cold temperatures resulted in the 4th coldest NFL game on record between the Kansas City Chiefs and Miami Dolphins, with kickoff temperature being -4F.[64] Fifteen people were hospitalized due to the cold temperatures during the game.[65] Wind chills following the storm reached as low as -60F in Montana, and wind chills were still -9F as far south as Dallas on January 14.[66] On January 13, Dillon, Montana reached an all time record low of -42F, while Bozeman, Montana recorded their second coldest temperature at -45F.[67] That same day, Dickinson, North Dakota reached a -70F wind chill, their coldest since the wind chill formula was updated in 2001, and a -33F air temperature, a daily record and their coldest temperature since 1990.[68] On January 16, Houston dropped to a daily record low of 19F.[69] The cold wave and snow that the storm brought with it led to at least 55 fatalities.[70]
A slow-moving significant blizzard affected much of Atlantic Canada from February 2–5, dumping NaNfeet of snow as the system stalled south of the Canadian Maritimes and Nova Scotia.[71] [72] A peak accumulation of 150cm (60inches) was measured in the town of Sydney, Nova Scotia. Blizzard-like conditions occurred across the eastern portions of the region as the system slowly moved east, and schools were closed and many roadside services were suspended during the duration of the storm.[73] Hundreds of 9-1-1 calls were made during the height of the blizzard, particularly in the regions with heavier snowfall and gusty winds.[72]
See main article: February 2024 California atmospheric rivers. A Pineapple Express storm hit the state from February 1 to February 2, 2024, before moving over the United States and settling over the I-25 corridor in Colorado, where heavy snow fell. Another one is expected to hit February 3 and last until February 5, with the National Weather Service calling it "potentially life-threatening." Other news sources estimated that Los Angeles could receive six-months' worth of rain in the 48-hour period, while the Sierra Nevada mountains are generally expected to get 1to of snow, with over 4feet of snow expected in higher elevations, such as Mammoth Lakes, CA. Parts of the San Bernardino Mountains' foothills could receive 10to of rain.[74]
| Rsi: | 0 |
| Track: | 2024021215 lowtrack public.gif |
| Lowest Pressure: | 956 |
| Max Snow: | 15.2 |
| Duration: | February 10–13, 2024 |
| Fatalities: | 1 |
| Damage: | Unknown |
See main article: February 2024 nor'easter. A weak area of low pressure developed along the Gulf Coast and trekked northeastwards throughout February 11–12 across the Southeast as the system as a whole continued eastward.[75] At 09:00 UTC, the Weather Prediction Center deemed it necessary to begin issue storm summary bulletins for the winter storm.[76] As the system became a nor'easter and moved offshore on February 13, rapid deepening – known also as "bombing out" – commenced overnight, with the central pressure falling from 991mb at 09:00 UTC on February 13 to 964mb at 03:00 UTC on February 14, a drop of 27mb in 18 hours.[77] [78] As this process commenced during the early morning hours on February 13, precipitation rapidly switched from rain to heavy snowfall along much of the Mid-Atlantic, with rates approaching NaNinches per hour in the northwestern and northeastern portions of New Jersey and Pennsylvania, respectively, which led to the heaviest snowfall totals of the event in those areas.[79] The nor'easter moved quickly, with precipitation and snowfall ending across the Mid-Atlantic and eventually New England by evening that day; consequently, the WPC terminated storm summary bulletins for the departing nor'easter at 03:00 UTC on February 14.[80]
Many cities in the Mid-Atlantic, particularly New York City, were expected to receive the heaviest snowfall accumulation in at least two years due to the nor'easter,[81] although the storm was notable for being difficult to predict in the aforementioned regions in the hours leading up to the event. Flights were cancelled or delayed across the Mid-Atlantic, and millions spanning from Pennsylvania to Massachusetts were placed under winter storm warnings. Over 175,000 people across the Northeast lost power, due to the heavy wet nature of the snow, and the nor'easter was responsible for at least one death so far as of February 13. Separately, the system dumped at least 1feet in parts of Texas and Oklahoma causing severe impacts in the region as well.
| Duration: | February 15–17, 2024 |
| Rsi: | 0 |
| Max Snow: | 13.8 |
| Fatalities: | 0 |
A surprise major winter storm began affecting the Mid-Atlantic during the overnight hours of February 16–17. A fast-moving clipper system moved through the Midwest early on February 16, dropping NaNinches of snow with isolated higher amounts near the cities of St. Louis, Missouri and Kansas City, resulting in Gateway Arch National Park closing at 2 p.m. on February 16.[82] The winter storm moved eastwards into the Ohio Valley where similar accumulations were reported. In Indianapolis, a fatality was reported on icy roads.[83] The main event began later that day as the system approached the Mid-Atlantic states. Frontogenesis occurred spawning a very heavy snowband reminiscent of those in lake-effect snow, which pushed into the eastern regions of Pennsylvania, central New Jersey – including the town of New Brunswick – and the southern parts of Staten Island, New York and western Long Island, just south of New York City.[84] Extreme snowfall rates of NaNinches per hour occurred in this band, which the Mount Holly National Weather Service (NWS) office described as "serious snowfall rates" and by amateur meteorologists in the region as "historic".[85]
The heaviest snow fell in Center Valley, Pennsylvania, with 13.8inches, with 13inches of snow in Township, New Jersey, 12.1inches in Allentown and 9.9inches of snow in Coney Island, New York.[86] Snowfall in New York City varied heavily, with 6.1inches of snow at John F. Kennedy International Airport and 2inches of snow in Central Park.[87] 2.2inches of snow fell in Baltimore,[88] and 3.5inches of snow fell in Philadelphia.[89] The winter weather resulted in the National Park Service shutting down portions of George Washington Parkway.[90]
A major winter storm began to affect the Western United States on February 29, with blizzard conditions and several feet of snow expected in the mountainous regions of the state of California.[91] Blizzard warnings were issued for a majority of the Sierra Mountains, including Lake Tahoe, California.[92] The storm resulted in over 100miles of Interstate 80 shutting down, and Yosemite National Park was also briefly shut down.[93] [94] The blizzard brought very strong winds to the mountainous regions – a near-record-breaking wind gust of 190mph was reported at Palisades Tahoe at an elevation of 8700feet late on March 1.[95]
On March 21 and 22nd, the storm brought up to 8inches of snow to the Twin Cities.[96] As the storm moved eastwards, heavy snow fell throughout the Northeastern United States on March 23, particularly in Northern New England and Upstate New York. The heaviest snow accumulation totaled 33.1inches in West Windsor, Vermont, with 29inches of snow in Penobscot, Maine, 28inches of snow in Albany, New Hampshire and 25.6inches of snow in Pawlet, New York.[97] Portions of Interstate 93 closed due to the snow.[98] The snowstorm resulted in 360,000 power outages in the Northeast, with nearly 200,000 in Maine alone. Further south, record rainfall brought flooding to Philadelphia, and shut down portions of the Cross Island Parkway and Fifth Avenue in New York City.[99] [100] The Staten Island Railway was also closed due to the rain.[101] Following the floods, temperatures dropped below freezing, leading to icy patches on roads in the New York metropolitan area.[97]
| Duration: | April 2-5, 2024 |
| Rsi: | 0 |
| Max Snow: | 28.0 |
| Fatalities: | 4 |
See main article: Tornado outbreak and derecho of April 1–3, 2024.
Early on April 2nd, a developing storm system began to produce heavy snow in the Upper Midwest.[102] Blizzard warnings were issued for portions of upper Michigan and winter storm warnings were issued elsewhere across the Upper Midwest, Upstate New York and into New England. The storm reached a minimum pressure of 984 mbar while located over southern Lake Michigan.[103] A deepening low-pressure area moving north toward New England became the dominant center of the storm as the greatest impacts shifted eastward into the Northeastern United States.[104] Precipitation began as rain in northern New England on April 3rd before transitioning to snow as cold air advection from high pressure positioned to the north of the storm.[105] [106] Heavy snow fell in areas of Upstate New York and New England through April 4th,[107] with scattered snow showers persisting until mid-day on April 5th.[108] The heaviest snow accumulation was recorded near Herman, Michigan at 28inches, with 24inches near Moretown, Vermont, 21.5inches near Shapleigh, Maine, and 21inches near Jefferson, New Hampshire. A wind gust of 73mph was recorded in Wellfleet, Massachusetts.[109]
On April 4th, wet, sticky snow adhering to trees and utility infrastructure coinciding with strong easterly winds caused widespread power outages and sporadic road closures across southeastern New Hampshire and southwest Maine.[110] [111] Four deaths were directly attributed to the storm.[112] Over 500,000 customers were without power in northern New England on April 4th, with 230,000 outages in New Hampshire and 275,000 in Maine.[113]
Many regions, particularly the Upper Midwest, saw their warmest winter on record, which was coupled with below-average snowfall as well.[114] Ice coverage across the Great Lakes was at a record low for the 2023–24 winter, due to a lack of persistent cold air. The Michiana region recorded their 2nd warmest and 4th least snowy winter.[115]
Several cities experienced one of their warmest winters on record, with little snowfall occurring on Christmas Day.[116] Extreme temperature contrasts occurred in December 2023 and January 2024, with the latter being one of the warmest Decembers on record in Canada, and coldest January in decades across Alberta and British Columbia.[117]