National Weather Service United States Department of Commerce

Potential Winter Storm System

Moderate to heavy snow may develop across portions of northeastern South Dakota and western Minnesota on Friday. However, uncertainty exists at this time as to where the rain/snow line will set up. Snowfall totals will be very dependent on this, particularly from Eureka to Aberdeen to Watertown. Read More >

Weather History Archive

On This Day In

                   Weather History

October 21st

Local and Regional Events:

October 21, 1987:

Cold arctic air continued to invade the central U.S. Eleven record lows were reported in the Great Plains Region, including lows of 12 degrees at Valentine, Nebraska, and 9 degrees at Aberdeen, South Dakota. Temperatures warmed rapidly during the day in the Southern and Central Plains Region. Goodland, Kansas warmed from a morning low of 24 degrees to an afternoon high of 75 degrees.


Local Climate Information:

Click HERE for daily climate information for Aberdeen, Mobridge, Pierre, Sisseton, and Watertown.

Click HERE for daily climate information for Sioux Falls, Huron, Mitchell, and Sioux City.


U.S.A and Global Events for October 21st:

1934: A severe windstorm lashed the northern Pacific coast. In Washington State, the storm claimed the lives of 22 persons, and caused 1.7 million dollars damage, mostly to timber. Winds, gusting to 87 mph at North Head, WA, produced waves twenty feet high on the Puget Sound. Click HERE for more information from the University of Washington.

The image above is the surface weather map during the morning hours on October 21st.


1966: An avalanche of mud and rocks buries a school in Aberfan, Wales, killing 148 people, mostly young students. The elementary school was in a valley below where a mining operation dumped its waste. In the days leading up to October 21, there was heavy rain in the area. After five months of investigation and the deposition of more than 100 witnesses, it was determined that the tip had blocked the natural course of water down the hill. As the water was soaked into the tip, pressure built up inside until it cracked, with devastating results. The site of the disaster later became a park. Click HERE for more information from BBC.


Iain McLean & Martin Johnes, Aberfan: Disasters and Government (Cardiff: Welsh Academic Press, 2000)


1975: Carlton Fisk made history on this day because of a walk-off home run in the 1975 World Series, after rain had postponed it for three days.

The image about contains local climatological data for Boston, MA.


1988: Hurricane Joan, the last hurricane of the season, neared the coast of Nicaragua packing 125 mph winds. Joan claimed more than 200 lives as she moved over Central America, and total damage approached 1.5 billion dollars. Crossing more than 40 degrees of longitude, Hurricane Joan never strayed even one degree from the 12-degree north parallel. After crossing Central America into the Pacific, the cyclone was renamed Tropical Storm Miriam, with the system's dissipation occurring southwest of Mexico.

File:Hurricane Joan 22 oct 1988 1317Z.jpg

This image shows Hurricane Joan near peak intensity on October 22. The storm's maximum sustained winds at the time were about 140 mph. This image was produced from data from NOAA-10, provided by NOAA.


2010: Tornadoes do occur in South America. A tornado rampaged through Poza del Tigre, a northern Argentinean town, leaving at least six are dead and over 100 wounded. Click HERE for more information from the Associated Press.

Click HERE for more This Day in Weather History from the Southeast Regional Climate Center.