It’s been an abnormally — if not record — cold start and snowy start to April for the Northern Plains the Midwest. Let’s first talk about the cold: a near-constant supply of cold air intruding from Canada has allowed for dozens of climate stations in the region to record their coldest start to April on record. Cities like Minneapolis, Omaha, Des Moines, and Chicago have all had a top three coldest start to April (April 1-14) in history. It’s not only the Northern Plains and Midwest that have been feeling the chill — almost all of the region east of the Rocky Mountains have recorded below average temperatures overall month-to-date. The only exception is in the Florida Peninsula where it has been warmer than normal.
Daily record low minimum and maximum temperatures have also outpaced record high minimum and maximum temperatures, something that has not been common in recent years. According to NOAA, 2017 was the third-warmest year on record for the United States. Year-to-date for 2018, warm temperature records have been outpacing cold temperature records, but not by nearly as much as during 2017. In terms of what has been happening so far this April, there have been 3546 cold temperature records compared to the only 1280 warm temperature records. That is almost a 3:1 ratio, so for every one warm temperature record, three cold records have been accomplished.
Based on the long-range outlook, the cooler than average temperatures will persist for about the next week before milder temperatures move into the Central Plains up through the Great Lakes and New England. The Mid-Atlantic and Southeast, however, should remain on the cooler side as we end April and get into the start of May.
Now let’s talk snow: so many snow records have been broken so far this April, especially from the most recent snowstorm that impacted the Northern Plains, Midwest, Great Lakes, and Northeast between April 13th and 16th. Here’s some of the notable records and statistics from this storm or that this storm has contributed to in terms of snowfall this month:
- 7th snowiest winter in Sioux Falls, South Dakota with 64.2 inches. The record snowiest winter is 94.7 inches from 1968-69.
- 3rd snowiest start to the year in Sioux Falls with 53.3 inches. The record snowiest year-to-date is 71.1 inches from 1962.
- 13.7 inches of snow on April 13th in Sioux Falls shatters the daily and monthly highest snow records and also breaks the total monthly snowfall record by over 6 inches.
- Largest April snowstorm with 15.8 inches in the Twin Cities (Minneapolis/St.Paul, Minnesota). This breaks the previous record of 13.6 inches set back in 1983.
- 12th largest all-time snowstorm in the Twin Cities. The record is 28.4 inches set in 1991.
- All-time snowiest start to the year in the Twin Cities with 70.3 inches. This breaks the previous record of 69.5 inches set in 1982.
- 23.5 inches of snow from this snowstorm makes it the largest April snowstorm on record and the 2nd all-time largest snowstorm in history in Green Bay, Wisconsin.
To say the weather this April has been wild is an understatement. The National Weather Service office in the Twin Cities compiled the graphic below to show some of the fun (or not-so-fun) facts related to the cold and snow this April.
— NWS Twin Cities (@NWSTwinCities) April 16, 2018
Now is any more snow on the way? For some: yes. Another winter storm will bring snow to portions of the Northern Plains and Midwest midweek, but based on climatology, the snow will eventually have to stop as summer gradually approaches. Most locations in this region have either already passed their average last measurable snowfall date or are about to reach it. The only locations that typically see the measurable snow come to an end in May is in the Rocky Mountains.
Median date for the last measurable snow of the season. Areas in light blue (cyan) and purple historically ave a ≥50% change of snow on or after April 1st. pic.twitter.com/ZErBu4GJaI
— Brian Brettschneider (@Climatologist49) March 30, 2018
It’s unusual to get snow in the Northern Plains and Midwest in the month of May, but it has happened several times in the past before. Let’s hope the snow comes to an end real soon this year!