The snowstorm of December 22 to 29, 2009

The Regional Snowfall Index is NOAA’s ranking of snowstorms east of the Rockies by how much snow fell, over how wide an area and on how many people, region by region: the area and the population above four snowfall thresholds set for each region, weighted against that region’s own history. A storm is scored in each region it reached, on a scale from 1, notable, to 5, extreme.

Events

1,138

Deaths

31

Injuries

50

Damage

$23 million

Episodes

129

Every winter weather episode the Weather Service filed east of the Rockies in these dates. A few may belong to another system on the same days. Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

• Ice Storm in Montana, December 20 to 21, 20096 eventsFreezing rain developed over portions of North Central Montana. Ice accumulations of one-quarter inch were reported.
• Winter Weather in Michigan, December 21, 20091 eventModerate lake effect snow developed over portions of Ontonagon County on the 21st in the wake of an Alberta clipper low pressure system.
• Winter Storm in Utah, December 21 to 23, 20092 eventsAnother Pacific storm system brought widespread rain and snow to Utah, but only isolated pockets of far southern and far northern Utah received heavy snowfall.
• Winter Weather in Iowa, December 21 to 22, 20096 eventsAn upper air disturbance, combined with a warm front lifting across the region, produced a band of light snow over northeast Iowa and northwest Illinois on December 21-22, 2009.
• Winter Weather in Illinois, December 21 to 22, 20096 eventsAn upper air disturbance, combined with a warm front lifting across the region, produced a band of light snow over northeast Iowa and northwest Illinois on December 21-22, 2009.
• Heavy Snow in Idaho, December 21 to 22, 20092 eventsA foot of snow fell at Galena Summit.
• Heavy Snow in Maine, December 22 to 23, 20098 eventsA persistent trof focused an extended interval of heavy snow across northern and portions of eastern Maine. Snow began during the afternoon of the 22nd and continued into the evening of the 23rd.
• Heavy Snow and High Wind in Arizona, December 22 to 23, 2009$3,000 · 51 kt wind · 3 eventsA fast moving trough resulted in strong winds across Southeast Arizona with blowing dust on December 22nd along with heavy snow in the higher elevations of Northern Greenlee County.
• Winter Storm in Alaska, December 22 to 24, 20093 eventsA 1036 MB arctic High pressure system was over the Yukon on 12/22 with cold air in gap flow for northern SE Alaska. Warm moist air began to overrun this cold outflow resulting in heavy snow for several areas in the Northern Panhandle.
• Heavy Snow in New Mexico, December 22 to 23, 20092 eventsA large upper low moved through the four corners region with a 130kt jet moving into southwest New Mexico. This resulted in heavy snowfall in the higher elevations of the Gila Region and in the Sacramento Mountains.
• Winter Weather in Kansas, December 22 to 23, 20093 deaths · 3 injured · $175,000 · 2 eventsFog and light freezing drizzle produced a thin layer of ice on area roads, including Interstate 70. Accidents were reported in both Sherman and Thomas counties resulting in three fatalities and three injuries. Dozens of other non-injury accidents were reported.
• Heavy Snow in New Mexico, December 22 to 24, 20091 death · 3 injured · 8 eventsA storm over the Pacific Northwest on the 21st moved to the Great Basin on the 22nd, into northern Arizona on the 23rd and crossed New Mexico from northwest to southeast late on the 23rd into the early morning hours of the 24th.
• Winter Storm and Winter Weather in Colorado, December 22 to 24, 20099 eventsA winter storm produced heavy snow across parts of the Front Range and adjacent plains.
• Heavy Snow in Colorado, December 22 to 23, 20091 eventA complex winter storm developed over the central High Plains early on the 23rd. An area of moderate to heavy snow fell across central and western Cheyenne County with amounts of 4 to 7 inches reported from cooperative observers.
• Winter Storm in Colorado, December 22 to 23, 20091 eventModest amounts of snow were noted across portions of southern Colorado as a storm system moved across the region. Over 6 inches of snow was noted over a good part of eastern Kiowa County...with lesser amounts across the rest of southern Colorado.
• Ice Storm and Winter Storm in Kansas, December 23 to 26, 20092 deaths · 6 injured · $77,000 · 17 eventsA double-barreled winter storms affected the Kansas region from the predawn hours on the 23rd through the early morning hours on the 25th.
• Heavy Snow and Winter Weather in Kansas, December 23, 20091 death · 8 injured · $80,000 · 8 eventsA complex winter storm developed over the central High Plains early on the 23rd, producing an area of moderate to heavy snow generally southeast of a line from Russell Springs in Logan County to Norcatur in Decatur County.
• Winter Storm in Kansas, December 23, 20094 eventsEnergy associated with a strong system moving out of the Desert Southwest brought a mixed bag of wintry precipitation to the area. Through the morning hours, freezing drizzle, freezing rain, sleet and snow were observed across north central Kansas.
• Winter Storm in Minnesota, December 23 to 26, 200915 eventsA large dynamic storm system brought winter precipitation in the form of snow, sleet, and rain to northeast Minnesota during the Christmas holiday period. The storm also strong winds to the Northland.
• Winter Storm in Nebraska, December 23, 20097 eventsEnergy associated with a strong system moving out of the Desert Southwest brought a mixed bag of wintry precipitation to the area. Through the morning hours, freezing drizzle, freezing rain, sleet and snow were observed across south central Nebraska.
• Ice Storm in Iowa, December 23, 200911 eventsAn ice storm occurred on December 23, 2009 in portions of eastern Iowa and northwest Illinois. Ice accumulations of 1/4 to 1/2 inch were common which coated trees and power lines but temperatures in the lower 30s kept most roads wet.
• Ice Storm in Nebraska, December 23, 20094 eventsWarmer and more moist air spread north across eastern Nebraska and southwest Iowa in advance of a developing complex winter storm that was lifting out of the southern plains.
• Heavy Snow in North Dakota, December 23 to 25, 200918 eventsA strong winter storm event struck eastern North Dakota during the Christmas holiday, dropping heavy amounts of snow over an extended period of time. One to two feet of snow fell over eastern North Dakota, with the most snow falling over the central Red River Valley.
• Heavy Snow in Minnesota, December 23 to 26, 200916 eventsA strong winter storm event struck the northwest quarter of Minnesota during the Christmas holiday, dropping heavy amounts of snow over an extended period of time.
• Heavy Snow in Minnesota, December 23 to 25, 20098 eventsA strong winter storm event struck the northwest quarter of Minnesota during the Christmas holiday, dropping heavy amounts of snow over an extended period of time.
• Ice Storm in Illinois, December 23, 20098 eventsAn ice storm occurred on December 23, 2009 in portions of eastern Iowa and northwest Illinois. Ice accumulations of 1/4 to 1/2 inch were common which coated trees and power lines but temperatures in the lower 30s kept most roads wet.
• Ice Storm in Iowa, December 23, 20092 eventsWarmer and more moist air spread north across eastern Nebraska and southwest Iowa in advance of a developing complex winter storm that was lifting out of the southern plains.
• Ice Storm in Iowa, December 23 to 24, 2009$15 million · 18 eventsPart 1 of 2: A major winter storm system affected the central U.S. during Christmas week. There were two upper level systems involved with this storm. The southern stream low dove into the southern U.S. and then turned northeast.
• Blizzard and Winter Storm in Nebraska, December 23 to 26, 200917 eventsAn intense low pressure system in the Southern Plains lifted northward into Missouri on Thursday, December 24th, and into western Iowa on Friday, December 25th, 2009.
• Ice Storm in Illinois, December 23 to 24, 200910 eventsA winter storm moved across northern Illinois during the afternoon and evening hours of December 23rd.
• Ice Storm in Indiana, December 23 to 24, 20093 eventsA winter storm moved across northwest Indiana during the afternoon and evening hours of December 23rd. A mixture of sleet, snow and freezing rain changed to all freezing rain by evening with many locations receiving between one quarter and one half inch of ice accumulation.
• Blizzard in South Dakota, December 23 to 26, 2009$10,000 · 24 eventsProlonged snowfall produced heavy accumulations over southeast South Dakota, ranging up to over 20 inches in several areas. The snowfall took place from two days before to the day after Christmas.
• Blizzard and Winter Storm in Iowa, December 23 to 26, 200911 eventsProlonged snowfall produced heavy accumulations of 1 to 2 feet in most of northwest Iowa. The snowfall took place from two days before to the day after Christmas.
• Winter Storm and Winter Weather in Minnesota, December 23 to 28, 20091 death · $15,000 · 15 eventsProlonged snowfall produced heavy accumulations of 1 to 2 feet in southwest Minnesota. The snowfall took place from two days before to the day after Christmas.
• Blizzard in South Dakota, December 23 to 26, 200924 eventsA broad upper level low pressure area over the Upper Midwest associated with an intense surface low pressure area brought widespread heavy snow along with blizzard conditions to central and northeast South Dakota.
• Winter Weather in Wisconsin, December 23 to 24, 20095 eventsThe area from Marquette County east to Sheboygan experienced snow accumulations ranging from 1.5 inches near Lake Michigan to 3 inches in Green Lake County. Near the end of this event, a glazing of freezing rain occurred with ice accumulations of less than 1/10 of an inch.
• Blizzard in Nebraska, December 23 to 26, 20092 eventsProlonged snowfall produced heavy accumulations in extreme northeast Nebraska, ranging up to 20 inches near the Missouri River. The snowfall took place from two days before to the day after Christmas.
• Winter Storm in Wisconsin, December 23 to 25, 20094 eventsA winter storm impacted portions of southwest and central Wisconsin starting on December 23rd, continuing through the Christmas holiday.
• Heavy Snow in Texas, December 23 to 24, 20096 eventsA strong upper level storm system moved across southeast New Mexico and west Texas on the morning of 12/24/09.
• Winter Storm in Iowa, December 23 to 25, 20091 eventA winter storm impacted portions of northeast Iowa starting on December 23rd, continuing through the Christmas holiday.
• Blizzard and Winter Storm in North Dakota, December 23 to 26, 200956 eventsA significant and prolonged winter storm impacted all of west and central North Dakota beginning Wednesday, December 23rd, lasting into Saturday, December 26th. Lead time was significant, as statements, watches, and warnings were posted well in advance of the storm.
• Winter Storm in Minnesota, December 23 to 26, 200941 eventsA very amplified weather pattern developed across the central U.S. the latter part of December, which produced nearly 48 hours of wintry precipitation across the Upper Midwest, starting the evening of December 23th.
• Ice Storm in Wisconsin, December 23 to 24, 20094 eventsCounties along the Illinois border saw snow quickly turn over to freezing rain during the December 23rd afternoon hours which resulted in a low-end ice storm. Ice accumulations of 1/4 to 1/2 inch coated trees and power lines causing them to break.
• Winter Storm in Minnesota, December 23 to 25, 20093 eventsA winter storm impacted portions of southeast Minnesota starting on December 23rd, continuing through the Christmas holiday.
• Winter Storm in Wisconsin, December 23 to 24, 200911 eventsWinter Storm conditions were experienced in the Baraboo to Madison to Milwaukee corridor from the evening hours of Dec 23rd into the early morning hours of Dec 24th. This storm had a major impact on Holidy shoppers and travelers due to slippery roads and poor visibibilities.
• Winter Storm in Minnesota, December 23 to 26, 20092 eventsA broad upper level low pressure area over the Upper Midwest associated with an intense surface low pressure area brought widespread heavy snow along with low visibilities in blowing snow to Big Stone and Traverse counties.
• Winter Storm in Wisconsin, December 23 to 25, 20096 eventsA very amplified weather pattern developed across the central U.S. the latter part of December, which produced nearly 48 hours of wintry precipitation across the Upper Midwest starting the evening of December 23th.
• Winter Storm in South Dakota, December 23 to 26, 20092 eventsA broad upper level low pressure area over the Upper Midwest associated with an intense surface low pressure area brought widespread heavy snow along with low visibilities in blowing snow to Grant and Deuel counties.
• Winter Storm in Wisconsin, December 23 to 26, 20097 eventsA large storm system brought snow, sleet, and rain to northwest Wisconsin during the Christmas holiday period. The storm also brought strong winds to the Northland, especially near Lake Superior where the wind gusted up to 45 mph in the Superior area.
• Blizzard and Winter Storm in Texas, December 23 to 24, 20091 death · 6 injured · $930,000 · 31 eventsA major winter storm brought blizzard conditions and widespread significant snow accumulations to the South Plains region of west Texas on Christmas Eve. The remnant snow pack resulted in a subsequent and rare White Christmas for much of west Texas.
• Extreme Cold in Montana, December 24, 20091 death · 1 eventTemperatures below zero occurred across the area.
• Winter Storm in Wisconsin, December 24 to 25, 200910 eventsA low pressure system that moved from Texas to Iowa produced snow, sleet and freezing rain across central and north-central Wisconsin. Precipitation occurred in two waves.
• Winter Storm and Winter Weather in Michigan, December 24, 20095 eventsA low pressure system developing over the Plains brought periods of heavy snow...sleet and freezing rain to portions of western Upper Michigan from Christmas Eve into Christmas Day.
• Blizzard and Winter Storm in Oklahoma, December 24, 20093 deaths · $2.1 million · 42 eventsA powerful winter storm developed over parts of the Southern Plains, resulting in one of the most widespread and damaging blizzards to affect Oklahoma in decades.
• Blizzard and Winter Storm in Nebraska, December 24 to 27, 20091 death · 60 eventsThe second winter storm of the month hit eastern Nebraska and southwest Iowa as a complex weather pattern brought a prolonged period of winter weather, including blizzard conditions, to the region around Christmas.
• Blizzard and Winter Storm in Iowa, December 24 to 27, 200916 eventsThe second winter storm of the month hit eastern Nebraska and southwest Iowa as a complex weather pattern brought a prolonged period of winter weather, including blizzard conditions, to the region around Christmas.
• Blizzard and Heavy Snow in Texas, December 24 to 25, 20091 death · 5 injured · 11 eventsA powerful upper level storm system brought blizzard conditions to the Big Country, the region located along and north of Interstate 20.
• Blizzard in Texas, December 24, 20098 eventsA powerful winter storm developed over parts of the Southern Plains, resulting in one of the most widespread and damaging blizzards to affect western north Texas in decades.
• Blizzard and Winter Storm in Missouri, December 24 to 26, 200921 eventsAn unusually strong storm system wreaked havoc on a large portion of the central United States during one of the heaviest travel periods of the year.
• Blizzard in Kansas, December 24 to 26, 20097 eventsAn unusually strong storm system wreaked havoc on a large portion of the central United States during one of the heaviest travel periods of the year.
• Winter Storm and Winter Weather in Texas, December 24, 20096 deaths · $2.1 million · 26 eventsA powerful upper level system dipped into north Texas bringing near blizzard conditions to the northwest portions of north Texas. Wind gusts up to 50 mph were reported during the afternoon hours across much of the western half of north Texas.
• Winter Storm in Oklahoma, December 24 to 25, 20093 deaths · 19 eventsA strong upper level low pressure system moved from the Southern Rockies across the Southern Plains on the 24th. Widespread precipitation developed as this system approached.
• Blizzard and Winter Storm in Kansas, December 24 to 25, 200934 eventsA strong storm system swept through the Central Plains during the Christmas holiday, bringing moderate to heavy snow and strong winds.
• Winter Weather in Michigan, December 24 to 25, 200923 eventsA mix of snow, sleet and freezing rain moved in from south to north on December 24 eventually transitioning to moderate freezing rain as predominant precipitation type.
• Blizzard in North Dakota, December 24 to 26, 200918 eventsAs the area of low pressure stagnated over Iowa, it deepened and brought stronger north to northeast winds to eastern North Dakota. The combination of snow and strong winds brought whiteout conditions to eastern North Dakota.
• Blizzard in Minnesota, December 24 to 26, 20098 eventsAs the area of low pressure stagnated over Iowa, it deepened and brought stronger north to northeast winds to the Red River Valley portion of northwest Minnesota. The combination of snow and strong winds brought whiteout conditions to this portion of northwest Minnesota.
• Winter Storm in Iowa, December 24 to 25, 2009$1.4 million · 25 eventsPart 2 of 2: A major winter storm system affected the central U.S. during Christmas week. There were two upper level systems involved with this storm. The southern stream low dove into the southern U.S. and then turned northeast.
• Blizzard in Nebraska, December 24 to 26, 200924 eventsAn intense upper level low pressure system deepened over the Desert Southwest in the days preceding Christmas, and unleashed its fury across the plains on Christmas Day.
• Winter Storm in Kansas, December 24 to 25, 20093 eventsAn intense winter storm system brought heavy snow, significant sleet and light freezing rain accumulations in addition to strong winds to southeast Kansas and southwest Missouri Christmas Eve into early Christmas Day.
• Winter Storm in Missouri, December 24 to 25, 200911 eventsAn intense winter storm system brought heavy snow, significant sleet and light freezing rain accumulations in addition to strong winds to southeast Kansas and southwest Missouri Christmas Eve into early Christmas Day.
• Winter Storm in Arkansas, December 24 to 25, 20094 eventsA strong upper level low pressure system moved from the Southern Rockies across the Southern Plains on the 24th. Widespread precipitation developed as this system approached.
• Ice Storm in North Carolina, December 24 to 25, 20097 eventsLight freezing rain developed late on Christmas Eve and continued throughout the overnight before becoming heavier shortly before sunrise. Light ice accretion occurred, mainly on elevated surfaces during this time.
• Winter Weather in North Carolina, December 25, 20099 eventsLight freezing rain developed during the early morning hours across the foothills and southern mountains of North Carolina, producing light ice accretion on elevated surfaces.
• Heavy Snow in Alaska, December 24 to 25, 20091 eventAnother huge storm developed well south of the Alaska Peninsula on 12/24 on the heels of a Gulf Low. The associated front moved slowly onto the coast on 12/25 bringing heavy snow to the Haines area. later on the night of 12/24 through the morning of 12/25.
• Blizzard in South Dakota, December 25 to 26, 2009$610,000 · 19 eventsA powerful winter storm moved across the Northern and Central Plains, bringing heavy snow and very strong winds.
• Winter Weather in West Virginia, December 25, 20094 eventsLow Pressure tracked through the Midwest and into the Great Lakes spreading precipitation across the area. There was just enough cold air in place for precipitation to begin in the form of freezing rain across eastern West Virginia.
• Winter Weather in Maryland, December 25, 20092 eventsLow Pressure tracked through the Midwest and into the Great Lakes spreading precipitation across the area. There was just enough cold air in place for precipitation to begin in the form of freezing rain across western Maryland.
• Winter Weather in Virginia, December 25, 20091 eventLow Pressure tracked through the Midwest and into the Great Lakes spreading precipitation across the area. There was just enough cold air in place for precipitation to begin in the form of freezing rain across the Potomac Highlands of Virginia.
• Winter Storm in South Dakota, December 25 to 26, 2009$50,000 · 3 eventsA powerful winter storm moved across the region, bringing heavy snow to the area. Snowfall amounts across the northern Black Hills were generally in the two to four foot range. Lighter snow fell across the central and southern Black Hills, with amounts to eight inches.
• Ice Storm in Pennsylvania, December 25, 20098 eventsA strong storm system moving across the Great Lakes produced a period of freezing rain across Garrett county Maryland, the ridges of northern West Virginia and western Pennsylvania, and along the Interstate 80 corridor of northern Pennsylvania.
• Winter Weather in New Jersey, December 25, 20093 eventsAn upslope southeast flow around an intense low pressure centered in Iowa on Christmas morning (the 25th) produced some spotty freezing drizzle across Northwest New Jersey. Untreated roadways and walkways were slippery.
• Ice Storm in West Virginia, December 25, 20092 eventsA strong storm system moving across the Great Lakes produced a period of freezing rain across Garrett county Maryland, the ridges of northern West Virginia and western Pennsylvania, and along the Interstate 80 corridor of northern Pennsylvania.
• Winter Weather in Pennsylvania, December 25, 20092 eventsAn upslope southeast flow around an intense low pressure centered in Iowa on Christmas morning (the 25th) produced some spotty freezing drizzle across the Poconos. Untreated roadways and walkways were slippery.
• Ice Storm in Maryland, December 25, 20091 eventA strong storm system moving across the Great Lakes produced a period of freezing rain across Garrett county Maryland, the ridges of northern West Virginia and western Pennsylvania, and along the Interstate 80 corridor of northern Pennsylvania.
• Ice Storm in North Carolina, December 25, 2009$5,000 · 5 eventsStrong low pressure tracked from Texas through Iowa from December 24-25 bringing precipitation which began as freezing rain in many areas due to trapped cold air at the surface.
• Ice Storm in Virginia, December 25, 2009$5,000 · 4 eventsStrong low pressure tracked from Texas through Iowa from December 24-25 bringing precipitation which began as freezing rain in many areas due to trapped cold air at the surface.
• Winter Storm in Wyoming, December 25 to 26, 2009$25,000 · 2 eventsA powerful winter storm brought heavy snow and gusty winds to portions of northeastern Wyoming. The heaviest snow fell across the Wyoming Black Hills, where one to two feet of snow was reported.
• Blizzard in Wyoming, December 25 to 26, 2009$10,000 · 1 eventA powerful winter storm brought blizzard conditions to northeastern Crook County. Snowfall totals over a foot and drifts five to ten feet high were reported. Visibility were near zero for over 24 hours.
• Blizzard and Winter Storm in Nebraska, December 25 to 26, 20098 eventsAn upper level disturbance on the west coast moved southward over the southern Rockies and then out onto the southern plains from approximately December 21st through the 26th. This system affected the Cheyenne CWA in two waves.
• Winter Weather in Iowa, December 25 to 27, 200921 eventsA slow moving upper level low pressure system over the region produced a prolonged period of light to moderate snow during the weekend of December 25-27, 2009.
• Winter Storm in Montana, December 25 to 26, 20091 eventFour to seven inches of heavy snow accumulated in portions of Wibaux County. Strong winds created drifts of four feet an higher throughout the county.
• Winter Weather in Missouri, December 25 to 27, 20092 eventsA slow moving upper level low pressure system over the region produced a prolonged period of light to moderate snow during the weekend of December 25-27, 2009.
• Winter Weather in Illinois, December 25 to 27, 200913 eventsA slow moving upper level low pressure system over the region produced a prolonged period of light to moderate snow during the weekend of December 25-27, 2009.
• Blizzard in Kansas, December 25 to 26, 20093 eventsAn intense upper level low pressure system deepened over the Desert Southwest in the days preceding Christmas, and unleashed its fury across the plains on Christmas Day.
• Winter Weather in Pennsylvania, December 25 to 26, 20092 eventsA wintry mix of snow, sleet and mainly freezing rain occurred over the higher terrain of the Poconos from the late afternoon of the 25th into the morning of the 26th.
• Winter Storm in Wyoming, December 25 to 26, 20091 eventA significant snowstorm moved across the Central Plains and Midwest and moved northwest into the Northern High Plains. Wraparound snow and strong winds backed into far Southeastern Montana.
• Winter Weather in New Jersey, December 25 to 26, 20091 eventSleet and mainly freezing rain occurred over the higher terrain of Sussex County from the evening of the 25th into the morning of the 26th. Steady precipitation began during the evening on the 25th as a wintry mix over the higher terrain, but changed to freezing rain quickly.
• Winter Weather in Illinois, December 25 to 27, 200914 injured · 7 eventsA complex and slow-moving system brought an extended period of snow to central Illinois from December 25th through December 27th. The first wave of significant snow occurred during the night of December 25th through midday on the 26th.
• Winter Weather in New York, December 25 to 27, 200926 eventsA large and powerful low pressure system over the upper midwest moved slowly northeastward as it weakened on Saturday, December 26th. In the meantime, a secondary low had formed over the mid atlantic region and moved gradually northeast.
• Winter Weather in Massachusetts, December 25 to 27, 20092 eventsA large and powerful low pressure system over the upper midwest moved slowly northeastward as it weakened on Saturday, December 26th. In the meantime, a secondary low had formed over the mid atlantic region and moved gradually northeast.
• Winter Weather in Connecticut, December 25 to 26, 20092 eventsA large and powerful low pressure system over the upper midwest moved slowly northeastward as it weakened on Saturday, December 26th. In the meantime, a secondary low had formed over the mid atlantic region and moved gradually northeast.
• Ice Storm in New York, December 25 to 26, 20091 eventA large and powerful low pressure system over the upper midwest moved slowly northeastward as it weakened on Saturday, December 26th. In the meantime, a secondary low had formed over the mid atlantic region and moved gradually northeast.
• Winter Weather in Vermont, December 26 to 27, 20093 eventsA large and powerful low pressure system over the upper midwest moved slowly northeastward as it weakened on Saturday, December 26th. In the meantime, a secondary low had formed over the mid atlantic region and moved gradually northeast.
• Winter Storm in Illinois, December 26, 20099 eventsA slow moving winter storm moved across northern Illinois on December 26th. Snow began to fall during the early morning hours and continued through the late evening hours.
• Winter Weather in Michigan, December 26 to 27, 20093 eventsA low pressure system moving from Wisconsin over northern Lake Michigan generated moderate lake effect snows over south central Upper Michigan on the 26th and 27th.
• Heavy Snow in Wisconsin, December 26, 20094 eventsA weakening area of low pressure moved across southern Wisconsin. The low was part of a large storm that affected the Plains and Midwest on Christmas. Cold northeast winds ahead of the weak system enhanced snowfall near Lake Michigan.
• Blizzard in Alaska, December 26 to 27, 20092 eventsA 1050 mb high centered several hundred miles north of the arctic coast combined with a 984 mb low across the eastern Aleutians and western Gulf of Alaska to produce a strong pressure gradient along the arctic and Chukchi Sea coasts.
• Lake-Effect Snow in Michigan, December 26 to 27, 20094 eventsThe arrival of cold air and an upper air disturbance produced an increase in coverage and intensity of lake effect snow showers from Saturday afternoon December the 26th through Sunday the 27th.
• Lake-Effect Snow in Ohio, December 27 to 29, 2009$550,000 · 4 eventsA cold front moved across northeastern Ohio during the evening hours of December 27th. Cold northwest winds behind this front caused lake effect snow showers to develop late in the evening.
• Lake-Effect Snow in Pennsylvania, December 27 to 29, 2009$550,000 · 3 eventsA cold front moved across northwestern Pennsylvania during the evening hours of December 27th. Cold northwest winds behind this front caused lake effect snow showers to develop late in the evening.
• Cold in Illinois, December 28 to 31, 20094 deaths · 3 eventsA 55 year old woman died due to cold exposure on Kolmar Street in Chicago on December 29th. Low temperatures were in the single digits. A 58 year old man died from cold exposure in Mount Vernon Park on Aberdeen Street in Chicago on December 31st.
• Winter Storm and Winter Weather in West Virginia, December 28 to 29, 20092 eventsA cold front passed through eastern West Virginia on the 27th. The combination of cold air and moisture from the Great Lakes triggered snow for locations along and west of the Allegheny front.
• Winter Weather in Maryland, December 28 to 29, 20091 eventA cold front passed through western Maryland on the 27th. The combination of cold air and moisture from the Great Lakes triggered snow for locations along and west of the Allegheny front.
• Winter Weather in New York, December 28 to 29, 2009$50,000 · 9 eventsAn upper atmospheric area of low pressure and weak surface low moved across northern New York on the morning of December 28th.
• Winter Weather in New York, December 28 to 29, 20099 eventsA low pressure system and an upper level disturbance moved over the region Monday, December 28th, resulting in a light to moderate snowfall.
• Heavy Snow in New York, December 28 to 29, 20091 eventA low pressure system and an upper level disturbance moved over the region Monday, December 28th, resulting in a moderate to heavy snowfall.
• Winter Weather in Massachusetts, December 28 to 29, 20092 eventsA low pressure system and an upper level disturbance moved over the region Monday, December 28th, resulting in a light to moderate snowfall.
• Winter Weather in Vermont, December 28 to 29, 2009$145,000 · 16 eventsAn upper atmospheric area of low pressure and weak surface low moved across Vermont on the morning of December 28th.
• Winter Weather in Vermont, December 28 to 29, 20092 eventsA low pressure system and an upper level disturbance moved over the region Monday, December 28th, resulting in a light to moderate snowfall.
• Lake-Effect Snow in New York, December 28 to 29, 2009$105,000 · 6 eventsAn upper level disturbance brought a general two to four inch snowfall to the entire region. As the storm departed, lake effect snow developed off Lakes Erie and Ontario in the colder, westerly flow.
• Lake-Effect Snow in New York, December 28 to 29, 20094 eventsHeavy lake effect snow occurred from the afternoon of the 28th to the morning hours of the 29th. Snowfall accumulations ranged from 6 to 10 inches.
• Heavy Snow in Maine, December 28 to 29, 20092 eventsIntensifying low pressure tracking along the Maine coast produced a small area of heavy snow across central and southern portions of Penobscot county. Snow developed during the evening of the 28th and continued into the morning of the 29th.
• Heavy Snow in New Mexico, December 29, 20091 eventA Pacific storm system moved across southwestern New Mexico and into far west Texas with cold air already in place at the surface providing a favorable environment for snow.
• Heavy Snow in New Mexico, December 29, 20094 eventsA strong upper level storm system moved over southeast New Mexico and west Texas late on 12/28/09 and early on 12/29/09.
• Winter Storm in Utah, December 29 to 30, 20093 eventsThe last in another series of storm systems moving through Utah was the strongest, bringing heavy snow to mountains in both the northern and southern parts of the state.
• Winter Storm and Winter Weather in Texas, December 29 to 30, 20091 death · 2 injured · $60,000 · 15 eventsThe second winter storm to impact the South Plains in a week began to produce snow over the southwestern South Plains around 08:00 CST on the morning of the 29th.
• Heavy Snow in Idaho, December 29 to 30, 20091 eventEleven inches of snow fell at Bostetter Ranger Station and 13 inches fell at Howell Canyon.
• Heavy Snow in Oregon, December 29, 20091 eventA quick moving storm moved across northwest Oregon and over the top of some very cold air.
• Heavy Snow and Winter Weather in New Mexico, December 30 to 31, 20092 deaths · 3 injured · 3 eventsA fast moving, but intense short wave trough moved from northwest to southeast across New Mexico later on the 30th into the 31st. The atmosphere was very unstable during this time and temperatures were well below freezing in many areas.

The snowstorm of December 18 to 21, 2009The snowstorm of December 28, 2009 to January 4, 2010Snow nowEvery winter storm filed

NOAA NCEI Regional Snowfall Index, and the Storm Events Database for the episodes.