KDLT Home KDLT on Facebook KDLT on Twitter Get the KDLT iPhone App Get the KDLT Android App

After A Dry & Warm September, Temperatures Tumble



Bookmark and Share

It has been a wonderful few weeks as temperatures finally fell out of the record high territory with September finally getting days with temperatures below average, even though it was only a day here or there.  Now that we are in October, its that time when temperatures fall even faster as average highs go from around 70 on the 1st to the low 50’s by Halloween.  This will spark very large temperature swings, as this month is arguably the worst when it comes to wild contrasts in temperature not only from day to day, but also from city to city.  It’s not uncommon to find high temperatures some 40 degrees different between our northwest to our southeast.  Just like October fashion, there will be one such swing going through our area during the middle of the week.  A large trough will dig into the Midwest allowing temperatures to soar out ahead of it, but plummet behind it, leading the area to near record cold toward the weekend. 



Here is a look at our wild swings in temperature through the month of September…. And yes, October gets worse!





The yellow line you see that is steadily falling is where the average temperatures should be located.  The jagged line is where the actual temperatures ended up.  Notice that the overall high temperatures were below average and the overall low temperatures were below average, but we still found wild swings in the numbers from one day to the next.


Notice that highs peaked pretty early near 100 degrees then fell toward the end of the month with highs in the 60’s for a couple of days.  In October, things can get worse where highs can range from the 30’s to nearly 100 degrees.  But these wild temperature swings will likely be even more drastic this year.  Why you ask?  For the answer, we come back to our favorite friend called drought… we just can’t escape it.  In the middle of a drought, there is far less moisture in the ground AKA water.  Water has a much higher heat capacity then rock does AKA soil.  Heat capacity is the ability of an object to change temperature.  It takes A LOT more energy to change the temperature of water then rock.  Think about how long it takes to boil a pot of water.  It takes high heat for more then ten minutes to get the water hot enough for a very slow boil.  But if you stick a rock in a microwave, in 30 seconds the rock will be too hot to touch.  So with less water in the soil, it takes far less energy to heat and cool the surface of the earth, therefore it has a similar effect on the air around it.  Which is why we average warmer then average days and cooler then average nights over the past couple of months.


Not only was September all over the place in temperature, but it set records when it comes to rainfall.  Well, actually for lack of rainfall.  Aberdeen, Mobridge, and Pierre all set records for the driest September on record with many other locations in the north and west ending September ranked in the top 10.  Here are some of the stats.



So, I have been mentioning that October is often worse then September and it may live up to its name this week.  Here is a peek at projected 850mb temperatures using the computer forecasting models for Wednesday afternoon.




Notice the low that develops in central SD shown by the giant “L”, and how it drags up lots of warm air out ahead of it but temperatures plummet behind it.  This could lead to one of these large temperature contrasts I was talking about with highs in the southeast closing on 90 degrees, but areas in the northwest are stuck in the 50’s. Now take a look at what 850mb temperatures look like Thursday afternoon and then again Saturday afternoon.





The cold air swings in Thursday, which drastically cools the area, but it gets even colder by the weekend as numbers continue to drop right through the day Saturday.  Take a peek at our forecast high temperatures for the next few days.  Please remember that these will change a little as the days get closer, but this will give you a general idea of just how much colder it will be.







Even as a meteorologist, knowing that its coming for days, I’m still shocked at how quickly things can change.  Break out the winter clothes because it is going to be a chilly few days.  Stay warm!

Back To Top
Weather Blog Archive
     

Mock-Ups Announced To Fix 'Ripple Effect'   story with video

Before the first act ever takes the stage at the Denny Sanford PREMIER ...

Thune Addresses Grain Shipment Delays At SD Forum

Republican U. S. Sen. John Thune says he is doing everything he can to ...

Name Change At Westward Ho Country Club

Westward Ho Country Club in Sioux Falls is getting a name change. Club members voted at a ...

George McGovern Honored In Sioux Falls School  story with video  Aug. 28

SFFR Conducts Natural Gas Simulation Training   Aug. 28

Employee-Only Concert At New Events Center  Aug. 28

Man Arrested After Police Pursuit, 4 Car Crash  story with video  Aug. 28

Wisconsin Woman Dies In Crash Near Rapid City  Aug. 28

State Has Paid Out Over $2 Million In Settlements  Aug. 28

Judge Rules Against Libertarian In PUC Ballot Spat  Aug. 28

Oil Conference Planned In Spearfish In October  Aug. 28

Pressler Honors One Feather At South Dakota Wake  Aug. 28

Leads' Homestake Opera House Celebrates Centennial  Aug. 28

Judge Hearing Arguments In Disputed Candidate Case  Aug. 28

Woman Pleads Guilty In Sioux Falls Drug Conspiracy  Aug. 28

SF Police Chase Ends in Rollover, Arrest  Aug. 27

Portrait Of Janklow Dedicated To USD  story with video  Aug. 27

AZ Gun Range Incident Raises Questions  story with video  Aug. 27

South Dakota Tech School Gets $500,000 NASA Grant  Aug. 27

SD Lawmakers Explore Highway Funding, User Fees  Aug. 27

KDLT News Archive
     

Employee-Only Concert At New Events Center

Another big country act is booked for the new ...

Name Change At Westward Ho Country Club

Westward Ho Country Club in Sioux Falls is getting a name ...

Oil Conference Planned In Spearfish In October

The South Dakota Oil and Gas Association ...

Woman Pleads Guilty In Sioux Falls Drug Conspiracy  Aug. 28

Man Arrested After Police Pursuit, 4 Car Crash  story with video  Aug. 28

Mock-Ups Announced To Fix 'Ripple Effect'   story with video  Aug. 28

Judge Rules Against Libertarian In PUC Ballot Spat  Aug. 28

State Has Paid Out Over $2 Million In Settlements  Aug. 28

KDLT News Archive
     

Birds, Kye Winter win home finale

Sioux Falls, SD-- The Sioux Falls Canaries wrapped up their 2014 home ...

Adrian wins big to start football season  story with video

The Minnesota high school football season kicked off Thursday night and the ...

Vikes finish exhibition schedule 4-0  story with video

Teddy Bridgewater threw his 5th TD pass of the exhibition schedule and the ...

USD prepared for track meet at Oregon  story with video  Aug. 28

Augie Vikings feeling more confident  story with video  Aug. 28

Kim Nelson looks forward to opener against BV  story with video  Aug. 28

Vikes, Bridgewater prepare for Titans  story with video  Aug. 28

Birds fall in 9th to Saltdogs  story with video  Aug. 27

KDLT Sports Stories
     
Back To Top