Every tornado, hurricane, flood, blizzard, heat wave, record, earthquake, eruption, tsunami, wildfire and geomagnetic storm on record for December 30, in any year, each linked to its full record.
← December 29TodayDecember 31 →
Every event with a place, colored by kind. Tap one to open its record.
By deaths, damage and strength together, across every archive.
Earthquakes
A magnitude 8.2 earthquake struck Off SW Boso Peninsula, Japan. It killed 5,233 people, destroyed 20,162 houses and did extreme (about $25 million or more) damage. It caused a tsunami.
Tsunamis
A tsunami caused by a magnitude 8.2 earthquake struck Off SW Boso Peninsula, Japan, with a maximum water height of 11.7 meters. It killed 5,233 people, destroyed 20,162 houses and did extreme (about $25 million or more) damage.
Earthquakes
A magnitude 6.5 earthquake struck Yunnan Province, China. It killed 1,000 people, destroyed 4,500 houses and did extreme (about $25 million or more) damage.
Tornadoes
An F4 tornado touched down in Simpson, Smith counties, Mississippi and tracked 19.7 miles, 400 yards wide at its widest, killing 5 and injuring 50. From Grazulis's record of significant tornadoes: Magee, MS.
Earthquakes
A magnitude 7.2 earthquake struck Kabul, Samangan, Pakistan, Hindu Kush, Afghanistan. It killed 26 people, injured 483 and did $3 million in damage.
Other weather
The Neot HaKikar disaster, which occurred on 30 December 1970, was one of the worst natural disasters in the history of the State of Israel. Heavy rains caused rocks to detach from an overhanging cliff, crushing the dining room in an Israel Defense Forces base.
From Wikipedia, CC BY-SA 4.0.
Wildfires
The combination of very high winds and extremely dry conditions produced the most destructive wildfire in Colorado history ($2 Billion), the Marshall Fire. It was also one of the costliest fires in U.S. history.
Winter storms and snow
Snowstorm of December 30, 2013 was ranked category 2, Significant, on NOAA’s Regional Snowfall Index, strongest in the Ohio Valley. It lasted from December 30, 2013 to January 3, 2014.
Tornadoes
Between the evening of the 30th and the morning of the 31st, two separate lines of thunderstorms produced significant severe weather across southwest Missouri including damaging wind, large hail, and deadly tornadoes.
Other weather
The 2020 Gjerdrum landslide was a quick clay landslide that occurred in the early hours of 30 December 2020 at Ask village, the administrative centre of Gjerdrum, Norway. It spanned a flow off area of 300 by 700 metres and additionally affected 9 hectares by debris flow.
From Wikipedia, CC BY-SA 4.0.
Earthquakes
A magnitude 5.6 earthquake struck Assam, Cachar District, India. It killed 20 people, injured 100 and did severe (about $5 to $25 million) damage.
Earthquakes
An earthquake struck Costa Rica. It killed 29 people.
22 on December 30, oldest first.
An F4 tornado touched down in Simpson, Smith counties, Mississippi and tracked 19.7 miles, 400 yards wide at its widest, killing 5 and injuring 50. From Grazulis's record of significant tornadoes: Magee, MS.
An F3 tornado touched down in Dale County, Alabama and tracked 1.5 miles, 120 yards wide at its widest, injuring 14.
A tornado touched down on the west side of Iowa, destroying two homes, one businesss, and heavily damaging a small mall and several other homes. One woman was injured when flying debris came in her bedroom windown and hit her in the head while she was in bed.
A small tornado briefly touched down in The Colony at Alta Oaks Lane and Alta Oaks Court, doing widespread damage to fences, trees, and unroofing two houses. There were no injuries.
Exactly one week after the December 23rd outbreak, Southeast Texas received another round of severe weather as the next storm system moved out of the southwestern U.S. toward Texas. This event only lasted three hours (compared to eighteen hours on the 23rd).
A small tornado was spotted by a Helotes Fireman who was also a Skywarn Amateur Radio Spotter. It was small and dipped down briefly before lifting and dissipating. No damage was indicated.
Severe thunderstorms became severe across portions of Acadiana, producing flooding, hail, and tornadoes.
Between the evening of the 30th and the morning of the 31st, two separate lines of thunderstorms produced significant severe weather across southwest Missouri including damaging wind, large hail, and deadly tornadoes.
Unseasonably warm and moist air spread into northwestern Arkansas ahead of a cold front. Scattered thunderstorms developed in the late evening and early morning hours ahead of the cold front as a weak upper level disturbance passed through the region.
A tornado developed in the Corsicana area damaging a park and mobile home park.
Scattered thunderstorms ahead of a cold front produced sporadic wind damage and a couple of tornadoes across the tri-state area. Most of the damage occurred in Georgia with tornadoes touching down in Colquitt and Cook counties.
A broken prefrontal squall line shifted southward into the Ocmulgee and Altamaha River basins during the afternoon and early evening hours.
A cold front generated a band of strong to sever storms across southern Mississippi. Warm, moist air was confined to areas south of Interstate 20 and severe weather was only reported in that area as the squall moved through.
1 on December 30, oldest first.
Hurricane Harriet reached its peak of 130 kt (150 mph) with a central pressure of 950 mb, a category 4 storm.
15 on December 30, oldest first.
Flooding reported along Canyon Creek and the Trinity River near Junction City. Flooded also near Carrville and Weaverville. The driver of a car swept into Swift Creek at Trinity Center was washed away and drowned when he tried to exit the vehicle.
A powerful Pacific storm brought more heavy rain, snow and flash flooding to Central and Southern California. Total rainfall amounts ranged from 1 to 3 inches on the coastal plain to between 3 and 6 inches in the mountains.
Debris in streams caused water to back up and caused flooding in portions of eastern Sierra County. Several buildings experienced flooding, including the U.S. Forest Service office in Sierraville.
2.5 to 3.5 inches of rainfall produced widespread flooding in Deschutes and western Crook Counties. Many roads and bridges sustained damage and flooding in basements and first floors was common.
Heavy rainfall contributed to landslide on west side of Suttle Lake in southwest Jefferson County. The slide damaged several vehicles and buildings at Camp Davidson Church Retreat.
Thunderstorms produced heavy rain during the morning hours as a warm front moved north across southeast Louisiana.
Locally heavy rains fell over northern Arkansas on 12/30 and produced some flooding.
Once again, persistent, deep and strong southwesterly upper-level flow across the eastern U.S. resulted in an extremely moist and moderately unstable atmosphere over North and Central Georgia.
Strong to Severe Thunderstorms produced wind damage along with heavy rainfall as cells trained over the same area.
After a couple of days of occasional moderate to heavy rain acted to elevate stream flows and soil moisture levels, heavy rain showers and thunderstorms developing along and ahead of a cold front produced 2-3 inches of rain in just a few hours across portions of the Piedmont,…
After a couple of days of occasional moderate to heavy rain acted to elevate stream flows and soil moisture levels, heavy rain showers and thunderstorms developing along and ahead of a cold front produced 2-3 inches of rain in just a few hours across portions of the Piedmont,…
An approaching cold front triggered showers and a few isolated storms across the region. With an extremely moist air mass in place, moderate to heavy rain fell. Given the very saturated soils, flash flooding quickly developed.
An Ice Jam and high river stages produced flooding in the city of Oconto, called the worst flooding in decades. Water surrounded many homes and some businesses and the city of Oconto declared a flood emergency.
A wet late fall and early winter season in 2020 yielded a statewide average precipitation total of 39.71 inches, 3.21 inches above average. Ironically, this makes 2020 rank as the 20th wettest year on record. Annual rainfall varied tremendously across the state, however. Southeastern Oklahoma’s average of 65.43 inches was 14.84 inches above average to rank as their seventh wettest annual total, while the Panhandle saw a deficit of 4.05 inches for their 25th driest year on record.
From the National Weather Service in Norman, Oklahoma.
A large upper trough moved slowly through California on December 30 and 31. This system had a deep fetch of tropical moisture associated with it which resulted in a period of moderate to heavy precipitation along with widespread flooding across much of the area on December 31.
29 on December 30, oldest first.
Southwest winds with frequent gusts estimated at 60 mph damaged or destroyed the roofs of 36 homes in windward communities from Waimanalo to Kaaawa. Snapped tree branches injured two people in Kaneohe and Kailua.
Strong northwesterly winds on the back side of low pressure which moved southeast from the Dakotas through western Iowa and Missouri caused some minor structural and tree damage. A few power outages also resulted.
For the second time in about a week, strong winds buffeted New Jersey. The difference in surface pressure between a deepening low pressure system over the Canadian Maritimes and a high pressure system over Illinois and Missouri produced peak wind gusts during the daylight hours…
A line of severe thunderstorms moved across the Parish during the evening producing high winds that caused a tree to fall on a truck, killing one man and injuring one female. Many trees were reported down across the area due to the high winds.
Large Redwood tree was blown onto house in Sebastopol causing major damage.Wind dmage metal rofing on the road , large trees downed, power lines down.
Thunderstorm winds estimated at 70 miles an hour blew down several trees at Camp Gruber.
Trees and power lines were blown down, and a shrimp boat was capsized.
Severe damage to two home roofs.
Several mobile homes near Vinton were damaged, and trees and power lines were blown down.
Roof blown off a house.
Numerous trees toppled or snapped. Many of them were located along Highway 8 east of Colfax.
Gusty west winds blew a modular home off a trailer hauling it along northbound Pennsylvania State Route 309 in Lynn Township. The wind pushed the home off the trailer and onto its side. The home slid 280 feet before striking and breaking a telephone pole.
A strong cold front pushed through southeastern Georgia resulting in a couple strong thunderstorms.
Strong to high winds occurred over northern parts of El Paso County and Teller County. Winds gusted up to 80 mph knocking around 20 trees down. A semi-trailer was overturned near mile marker 148 on I-25 in northern Colorado Springs.
Northern parts of western Washington had high wind as a Pacific storm approached the coast.
A tight pressure gradient between a strong low pressure system over northern New England, and an approaching ridge of high pressure from the west, led to strong winds across eastern New York and western New England, from Monday evening, into midday Tuesday.
Very fast winds aloft combined with a steep surface pressure gradient prior to and following the passage of a fast-moving cold front produced very strong and gusty west to northwest winds throughout southeast Wyoming.
A strong upper level system generated high winds to a large portion of southern Colorado. Wind gusts generally reached 75 to 85 mph in the affected area...up to an impressive 111 mph gust at Monarch Pass (Chaffee County).
A strong cold front moved through Utah at the end of the year. This front produced strong winds in parts of northern Utah, beginning the evening of December 30th.
The same low pressure system that brought snow to New Jersey on the 29th intensified rapidly as it moved northeast overnight and reached Nova Scotia on the morning of the 30th. At 7 a.m. EST the surface pressure had dropped to 964 millibars.
Strong surface high pressure in the Great Basin generated strong and gusty north to northeast winds across sections of Ventura and Los Angeles counties. The strongest winds were reported in the mountains of Los Angeles county as well as the eastern valleys of Ventura county.
A strong wind storm struck the Bay Area on December 30 during the afternoon and evening hours. Strong winds brought down numerous trees and power lines across the area.
A low pressure system from the north moved into Southern California, bringing rain, mountain snow and gusty winds. The San Bernardino Mountains received a few inches of snow, heaviest overnight on the 30th.
Around Midnight on December 30th, a 997 mb area of low pressure over the Cincinnati metro area quickly moved north overnight, deepening to 988 mb over the Detroit metro by daybreak.
A very strong storm system moved into the Eastern United States late in the day and during the evening dragging a fast moving cold front through the Southern Appalachian region. Very strong wind flow from aloft was brought to the surface in storms that formed along the front.
A rapidly deepening low pressure system moved through the region in the pre-dawn hours on December 30, 2019, resulting in strong wind gusts in the 50-60 MPH range, with isolated gusts of 70 MPH.
Strong winds occurred ahead of low pressure and frontal boundary.
Strong winds occurred ahead of low pressure and frontal boundary.
An end of the year Pacific storm system brought breezy to locally windy condition to portions of the Western Washington lowlands on December 30.
45 on December 30, oldest first.
Snowstorm of December 30, 1959 was ranked category 2, Significant, on NOAA’s Regional Snowfall Index, strongest in the Northern Rockies and Plains. It lasted from December 30, 1959 to January 3, 1960.
Snowstorm of December 30, 1968 was ranked category 1, Notable, on NOAA’s Regional Snowfall Index, strongest in the Northern Rockies and Plains. It lasted from December 30, 1968 to January 2, 1969.
About a 70 mile wide band of heavy snow, southwest of a Galesburg to Springfield to Effingham line, occurred. Snow amounts ranged from 3 to 6 inches with the heaviest occurring in a line from Rushville to south of Springfield.
A series of fast-moving upper level disturbances caused heavy snow shower activity across East Tennessee. Amounts were generally 2" to 5", with locally higher amounts in higher elevations.
A strong storm moved up the east coast of the U.S. and dropped up to a foot and a half of snow across the Finger Lakes and easter Lake Ontario regions. The heavy snow downed power lines and trees east of Rochester.
A clipper system dropped out of Canada across the upper midwest and brought a round of snow to Eastern Iowa and Northwest Illinois.
Energy from a strong upper level disturbance, diving southeast from the northern Plains into the Ohio Valley, developed a coastal area of low pressure off the DelMarVa pennisula by early Saturday December 30.
Strong low pressure moving from the southern plains through eastern Wisconsin brought copious amounts of precipitation to northeastern Minnesota December 30th and 31st.
A significant mid-level disturbance, with an associated surface low, moved southeast across southern Vermont during the late morning and early afternoon on the 30th.
A wide variety of significant winter weather began impacting portions of north central Kansas. Freezing rain, sleet, and snow began early Saturday morning mainly along highway 183 and spread east during the day.
A unique meteorological condition led to very significant heavy snow over central and eastern North Dakota on December 30, 2006. An upper level low cut off over the southwest part of the United States and transported Gulf of Mexico moisture northward.
A significant mid-level disturbance, with an associated weak surface low, moved southeast across the southern Adirondacks during the morning of the 30th.
A low pressure system tracked northeast along the Atlantic Coast from Sunday, December 30th, into Monday, December 31st, while intensifying. This storm system brought a swath of moderate to heavy snow to eastern New York and western New England Sunday night into Monday morning.
An upper level disturbance moved across northern New York during the early morning hours of December 31st. In addition, a surface low moved north along the mid-Atlantic coast on the night of the 30th to southeast of Cape Cod by daybreak on the 31st.
A surface low across the southeast United States on the morning of December 30th moved along the Mid-Atlantic coast during the evening and night of the 30th to southeast of Cape Cod by daybreak on the 31st.
An avalanche in the western Uinta Mountains caught and killed one snowmobiler.
A deepening area of low pressure moved across the Ohio valley and Pennsylvania before moving off the southern New England Coast during the afternoon of the 31st. Steady snow developed over the region and was accompanied by increasing northerly winds.
A 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.
Freezing rain produced a light ice coating on driving and walking surfaces that caused several accidents and caused other vehicles to slide off roads.
A powerful winter storm brought heavy snow and gusty winds to the region. The first part of the storm produced heavy snow on Dec 30. The main system moved across the Central Plains with additional snow and strong northwest winds on the plains on Dec 31.
A strong upper level low pressure trough and associated surface low pressure area moved across the region bringing the first of two consecutive blizzards to central and northeast South Dakota.
After a remarkably snow-free start to winter, the last few days of 2010 finally brought the first widespread accumulations of the season to South Central Nebraska, as a powerful upper level low pressure system tracked across the region, following a path from northeast Colorado…
An upper level storm system tracking from eastern Colorado into central Nebraska brought significant snowfall to western and north central Nebraska. Strong northwest winds resulted in blowing and drifting snow and reduced visibility.
Another winter storm brought moderate to heavy snow, strong winds and very cold wind chill temperatures to the mountains, foothills and northeast plains of colorado.
A strong flow of Pacific moisture impacted the west facing slopes of the Beartooth and Absaroka Mountains. This resulted in a period of heavy snow to end out the year, and in fact, was the only significant snow of the month.
An unstable snowpack in the Snowmass area resulted in an avalanche that killed a person.
Snowstorm of December 30, 2013 was ranked category 2, Significant, on NOAA’s Regional Snowfall Index, strongest in the Ohio Valley. It lasted from December 30, 2013 to January 3, 2014.
A very cold storm system brought rare low elevation snow to the Mojave Desert.
Following an arctic front the night prior, widespread freezing drizzle developed early on the morning of the 31st throughout much of the region before mixing with and changing to very light snow.
A cold and strong area of low pressure moved southward along the California Coast and became cut off from the jet stream of the southern California Coast. This low brought moisture streaming northward over Arizona.
A very cold storm system brought rare low elevation snow to the Mojave Desert. The event continued into January 2015.
A high impact winter storm event affected most of West Central Texas during the period from January 30, 2014 through noon on January 2, 2015. The winter storm continued into the midnight hours of January 3rd.
A band of lake effect snow developed during the evening of December 30s across central and northern Oswego County extending into the southern portion of the Tug Hill Plateau.
A very cold storm system brought rare low elevation snow to the Mojave Desert.
A ridge of high pressure off the west coast along with a low pressure system dropping south through the inter-mountain west brought light precipitation to the Sierra Nevada on the 29th and 30th, with some rain and snow in the Kern county mountains as well.
A disturbance moving through the area brought brief moderate snow to portions of central Upper Michigan on the 30th. The snow caused slippery roads and likely contributed to a couple of accidents in Marquette and Dickinson counties.
A strong lake effect snow band tracked across northern Allen County during the early morning hours of December 30th. Slick roads associated with this quick 1 to 2 inches of snow aided in a fatal accident around 7:00 am EST.
An upper level disturbance brought light snow to areas along and near the Interstate 81 corridor between Pulaski and Botetourt Counties.
A cold Arctic airmass pushed south through North and Central Texas December 30th. While temperatures had dropped into the 20s early New Year's Eve, areas of freezing drizzle developed and created travel problems across the region.
The month of December ended with a storm system dropping heavy snow on portions of western Wisconsin on the 30th. One person was killed the following day in a snow plowing accident involving two vehicles near Lublin (Taylor County).
A strong low pressure system over the Great Lakes drew in moisture across southern New England, where cold air remained in place at the higher elevations.
Snowstorm of December 30, 2020 was ranked category 1, Notable, on NOAA’s Regional Snowfall Index, strongest in the South. It lasted from December 30, 2020 to January 3, 2021.
A deep upper level low dug into the southwestern U.S. and northern Mexico. Cold air ahead of the low caused rain showers to change to snow that quickly accumulated and remained on the ground for over a day.
The strongest winter storm of December passed through the region on the final two days of December. This storm initially produced very high snow levels near 9000 feet on 30 December.
A prolonged Atmospheric river event rounded out 2022 with lots of mountain snows and valley rain. OF NOTE: Storm Data will not allow LSR's to be entered under 12/2022 if the end time is in 01/2023.
12 on December 30, oldest first.
Beginning on the 29th and continuing through the 30th in the year 1898, a very strong cold front blasted through Oklahoma and north Texas. The temperature at Oklahoma city fell from 68 degrees at 5:50 PM on the 29th, to a very chilly 17 degrees at 10:00 AM on the 30th. The temperature dropped 51 degrees in only 16 hours. The temperature continued to drop to 8 degrees on the 31st at 9:00 AM.
From the National Weather Service in Norman, Oklahoma.
High temperatures in the teens and lows in single digits were too much for some pipes to handle. A pipe (part of a fire suppression sprinkler system) froze and burst in Brown Hall at Saginaw Valley State University.
Wind chill temperatures dropped to 45 to 65 degrees below zero across northern Maine and the Maine mountains as strong northwesterly winds of 15 to 25 mph brought arctic air into the area after the passage of a cold front.
Widespread freezing temperatures were observed across most of West Central and Southwest Florida during the late evening of December 30th through the mid-morning hours of December 31st, 2000.Low temperatures in Levy county dropped from the upper teens to lower 20s with durations…
Northwesterly flow aloft lead shortwave energy to only skirt the forecast area, though this did allow for cold air to settle into the valley. The shortwave also reinforced the cold air supply early on the 30th.
An Arctic cold front plunged through central Illinois on December 29, 2017...setting the stage for a prolonged period of extremely cold conditions from December 30, 2017 through January 2, 2018.
Following several strong cold fronts in the last week of December, a period of very cold temperatures settled into the Central Appalachians.
Bitter cold wind chills occurred across much of the area due to arctic air spreading across the region and remaining in place into the new year.
Several bouts of Arctic air and blustery winds brought extreme wind chills to all of central and northeast South Dakota. Wind chills of 35 degrees below to near 55 degrees below zero occurred off and on from December 30th into the first day of the new year.
Following the snowfall on December 29 and an additional snowfall of one to three inches in the Missouri River corridor (dusting to an inch to the northeast) late on the evening of December 30 and early on December 31, a brutally cold arctic high settled across the area through…
An Arctic airmass settled over the area, with high temperatures remaining below zero in most areas and low temperatures dropping to 15 below to 35 below zero, with the lowest values over northwestern South Dakota.
One person died in the Sierra Nevada, presumably of cold-related causes.
6 on December 30, oldest first.
Mountain City recorded -32°F, Tennessee’s all-time minimum temperature, as the State Climate Extremes Committee lists it.
Lewisburg recorded -37°F, West Virginia’s all-time minimum temperature, as the State Climate Extremes Committee lists it.
Bloomfield recorded -50°F, Vermont’s all-time minimum temperature, as the State Climate Extremes Committee lists it.
Orono recorded 40 inches, Maine’s all-time maximum 24-hour snowfall, as the State Climate Extremes Committee lists it.
Mazama recorded -48°F, Washington’s all-time minimum temperature, as the State Climate Extremes Committee lists it.
Winthrop recorded -48°F, Washington’s all-time minimum temperature, as the State Climate Extremes Committee lists it.
9 on December 30, oldest first.
The Black Bay Fire was discovered on December 30, 1998, in Louisiana, and burned 1,500 acres; the cause was recorded as debris and open burning.
The Unnamed Fire was discovered on December 30, 2001, in Tennessee, and burned 2,035 acres; the cause was recorded as arson/incendiarism.
The Duckhead Fire was discovered on December 30, 2005, in Arkansas, and burned 1,631 acres; the cause was recorded as natural.
The West Houston-Transport Fire was discovered on December 30, 2010, in Hockley County, Texas, and burned 1,920 acres; the cause was recorded as power generation/transmission/distribution.
The 136-2 Fire was reported on December 30, 2016, in Potter County, Texas, and burned 3,515 acres.
The 136-3 Fire was reported on December 30, 2016, in Potter County, Texas, and burned 2,562 acres.
The combination of very high winds and extremely dry conditions produced the most destructive wildfire in Colorado history ($2 Billion), the Marshall Fire. It was also one of the costliest fires in U.S. history.
m. MST, as a grass fire in Boulder County, Colorado.
From Wikipedia, CC BY-SA 4.0.
The Marshall Fire was reported on December 30, 2021, in Boulder County, Colorado, and burned 6,026 acres.
9 on December 30, oldest first.
A magnitude 8.2 earthquake struck Off SW Boso Peninsula, Japan. It killed 5,233 people, destroyed 20,162 houses and did extreme (about $25 million or more) damage. It caused a tsunami.
A magnitude 6.5 earthquake struck Yunnan Province, China. It killed 1,000 people, destroyed 4,500 houses and did extreme (about $25 million or more) damage.
An earthquake struck San Jose, Ala Juela, Heredia, Costa Rica. It killed few people (about 1 to 50), destroyed 1,439 houses and did severe (about $5 to $25 million) damage.
A magnitude 6.2 earthquake struck Sulu Sea, Philippines. It caused a tsunami.
An earthquake struck Costa Rica. It killed 29 people.
A magnitude 7.2 earthquake struck Kabul, Samangan, Pakistan, Hindu Kush, Afghanistan. It killed 26 people, injured 483 and did $3 million in damage.
A magnitude 5.6 earthquake struck Assam, Cachar District, India. It killed 20 people, injured 100 and did severe (about $5 to $25 million) damage.
A magnitude 7.5 earthquake struck New Britain, Papua New Guinea.
A magnitude 5.9 earthquake struck Mexicali, Mexico.
1 on December 30, oldest first.
Stromboli, Italy erupted with a Volcanic Explosivity Index of 2. The eruption caused a tsunami.
2 on December 30, oldest first.
A tsunami caused by a magnitude 8.2 earthquake struck Off SW Boso Peninsula, Japan, with a maximum water height of 11.7 meters. It killed 5,233 people, destroyed 20,162 houses and did extreme (about $25 million or more) damage.
A tsunami with a source recorded as volcano and landslide struck Stromboli Island, Italy, with a maximum water height of 10.9 meters.
6 on December 30, oldest first.
A G2 (moderate) geomagnetic storm began December 30, 1940, reached Kp 6+ and lasted 3 hours, with a daily Ap as high as 34; at that Kp the aurora may be seen from about 53 degrees geomagnetic latitude.
A G2 (moderate) geomagnetic storm began December 30, 1948, reached Kp 6 and lasted 24 hours, with a daily Ap as high as 29; at that Kp the aurora may be seen from about 55 degrees geomagnetic latitude.
A G1 (minor) geomagnetic storm began December 30, 1952, reached Kp 5 and lasted 3 hours, with a daily Ap as high as 31; at that Kp the aurora may be seen from about 60 degrees geomagnetic latitude.
A G2 (moderate) geomagnetic storm began December 30, 1981, reached Kp 6- and lasted 6 hours, with a daily Ap as high as 30; at that Kp the aurora may be seen from about 57 degrees geomagnetic latitude.
A G1 (minor) geomagnetic storm began December 30, 1983, reached Kp 5+ and lasted 9 hours, with a daily Ap as high as 33; at that Kp the aurora may be seen from about 58 degrees geomagnetic latitude.
A G2 (moderate) geomagnetic storm began December 30, 1985, reached Kp 6 and lasted 18 hours, with a daily Ap as high as 46; at that Kp the aurora may be seen from about 55 degrees geomagnetic latitude.
6 on December 30, oldest first.
The Neot HaKikar disaster, which occurred on 30 December 1970, was one of the worst natural disasters in the history of the State of Israel. Heavy rains caused rocks to detach from an overhanging cliff, crushing the dining room in an Israel Defense Forces base.
From Wikipedia, CC BY-SA 4.0.
A rogue wave capsized a 12 foot fishing boat at the mouth of Oceanside harbor. One man drowned, the other was injured when he and the boat were tossed onto the jetty by the wave.
Two swimmers were overtaken by a wave while swimming at the Pinones Beach, Monte Grande sector. One of them was rescued, the other drowned.
Synoptic high pressure moved over the central California region allowing for clear skies and dense radiational fog to develop over parts of the San Joaquin Valley.
The 2020 Gjerdrum landslide was a quick clay landslide that occurred in the early hours of 30 December 2020 at Ask village, the administrative centre of Gjerdrum, Norway. It spanned a flow off area of 300 by 700 metres and additionally affected 9 hectares by debris flow.
From Wikipedia, CC BY-SA 4.0.
A man died after being trapped within a rip current near Stuart Beach.
Gathered from this site’s archives: the tornado record (NOAA SPC, and Grazulis before 1950), IBTrACS and the National Hurricane Center, NOAA NCEI’s Storm Events Database, Regional Snowfall Index, billion-dollar disasters list, State Climate Extremes Committee and hazard databases, USGS, NIFC, GFZ Potsdam’s Kp index (CC BY 4.0), the National Weather Service in Norman, Oklahoma, and Wikidata (CC0), with article leads from Wikipedia under CC BY-SA 4.0, each credited where it appears. Rebuilt 2026-09-24.