First frost advisory for September issued for Sioux Falls area Wednesday
Areas along the eastern border of South Dakota, including Minnehaha County, will be under a frost advisory for a portion of Wednesday morning, according to the National Weather Service in Sioux Falls.
Temperatures will drop as low as 32 degrees, and the advisory is expected to last from 1 a.m. to 8 a.m. Wednesday, the service stated on its website.
The service warned the frost could kill sensitive outdoor vegetation if plants are covered. It's the first frost advisory of September for the year. Temperatures are not expected to dip below 40 degrees for the rest of the week, according to the service's seven-day outlook.
What areas of South Dakota will be affected by the frost advisory?
Areas include portions of northwest and west central Iowa, southwest Minnesota, northeast Nebraska and east central and southeast South Dakota, NWS started. More specifically, that includes:
De Smet
Arlington
Lake Preston
Brookings
Madison
Orland
Flandreau
Sioux Falls
Canton
Lennox
Tea
Harrisburg
North Sioux City
Beresford
Elk Point
Alcester
Jefferson
How typical is it to have frost in September in South Dakota?
Going back to 2005, the NWS of Sioux Falls has issued a total of 11 frost advisories for the month of September, including the one set for Wednesday morning.
With the autumnal equinox occurring tomorrow evening, is it time for frost advisories already??
As you can see in the image below, the answer is yes (but not for us, yet)! Going back to 2005, we have issued 10 frost advisories in the month of September, most recently in 2020. pic.twitter.com/1Gkg1Z2dpw— NWS Sioux Falls (@NWSSiouxFalls) September 22, 2022
And the earliest frost to occur in Sioux Falls was Aug. 11, 1902, according to NWS. The average time frame for frost is Sept. 22, and the latest time for frost in the Sioux Falls area was Oct. 16, 2021, the service stated.
Digging a little deeper, historical records show that some areas have seen low temps at or below 36°F as early as the 2nd week of August! Then again, later into October is just as possible, and has been more common in recent years. pic.twitter.com/CSDZ1tcWST
— NWS Sioux Falls (@NWSSiouxFalls) September 23, 2022
What's next in the seven-day forecast:
Here's a deeper look at what the weather will be like headed into the weekend, according to NWS.
Tonight: Areas of frost after 5 a.m. Otherwise, mostly clear, with a low around 35. East wind 5 to 10 mph.
Wednesday: Areas of frost before 9 a.m. Otherwise, sunny, with a high near 69. South southeast wind 5 to 15 mph, with gusts as high as 20 mph.
Wednesday night: Mostly clear, with a low around 45. South southeast wind around 10 mph, with gusts as high as 25 mph.
Thursday: Sunny, with a high near 71. Breezy, with a south wind 10 to 20 mph, with gusts as high as 30 mph.
Thursday night: Mostly clear, with a low around 53. South southeast wind 10 to 15 mph, with gusts as high as 30 mph.
Friday: Mostly sunny, with a high near 75. South southeast wind 10 to 15 mph, with gusts as high as 30 mph.
Friday night: Partly cloudy, with a low around 53.
Saturday: Mostly sunny, with a high near 78.
Saturday night: Partly cloudy, with a low around 52.
Sunday: Mostly sunny, with a high near 75.
Sunday night: Partly cloudy, with a low around 51.
Monday: Mostly sunny, with a high near 73.
Monday night: Partly cloudy, with a low around 49.
Tuesday: Mostly sunny, with a high near 72.
This article originally appeared on Sioux Falls Argus Leader: Sioux Falls weather forecast calls for first frost of fall 2022
