A "Weather Wacky" April for Texoma

Weather-Wacky April for Texoma…
Fri 20 April 2018 / 10:20 pm

April 2018 has been way “out of whack” from a typical one in Texoma:

First of all, there’s been a below average number of severe weather events, which is of course a good thing. There have been no Tornado Warnings in our viewing area so far in 2018, and we’ve only had two days, April 6 and April 13, with a significant amount of severe weather.

April 13 was a big hail day for many areas with up to golfball size hailstones reported at Tom Bean in Grayson County and Savoy in Fannin County; many locations from Carter to Choctaw Counties reported slightly smaller quarter to half-dollar size hail.

Now, to the coldness: it’s simple – we’ve had numerous Canadian air masses pushing deep into the Gulf; each one has brought a batch of dry air which cools more efficiently at night, making for many chilly mornings during the month. A major blizzard across the upper Midwest earlier in the month also deposited a large snowpack which allowed the southward-moving air to stay cold longer. Record lows were tied as that system passed through on April 15.

This pattern is unusual, and in fact it’s been 21 years (1997) since Texoma had an April this chilly. A highly amplified jet stream has helped to keep a deep “dip” over the eastern U.S. (red low on map) which allows these cold air masses to slip southward more easily. Until this pattern changes, we will continue to run with below average temperatures.

Here are the top 5 coldest Texoma Aprils in order:

Coldest – 1997
#2 – 1926
#3 – 1983
#4 - 1973
#5 - 1958

Lake temperatures are well below average for this time of year, and will be slow to warm given the continued cooler-than-normal pattern. Looking ahead, it’s likely that you will have a somewhat “chilly swim” if you’re going to the lake for Memorial Day this year.

Take Care,
Steve LaNore
Chief Meteorologist
News 12 / KXII-TV