Friday, September 4, 2020

Summer 2020: Warmest Summer in Chicago on Record


The National Weather Service's Meteorological Summer Summary reports that 2020 was the warmest summer on record in Chicago. When I first read this, I was a little surprised. While I remember two periods of extended high heat, one in July and one in August, 2020 did not feel like a record warm summer. Maybe that is because there were no 100 degree days, or maybe it is because we tend to remember the very hot unpleasant days in a summer and forget about the weeks of below average temperatures. One thing I do know is that I was measuring soil temperatures in the 90's this year for the first time since 2013, so it was definitely warm. 

Once I looked at the statistics in detail, it made sense. June, July, and August were all well above average in temperature by 5.0, 5.2, and 4.4 degrees respectively. Other summers with memorable heat waves (like 2012 or 1995) had a few more periods of below average temps to balance out their seasonal averages. When all three summer months are above average by that many degrees, it adds up to a record warm season. We also don't tend to notice nighttime lows as much as daytime highs and 2020 had the 3rd warmest low temperature average on record and the 5th highest high temperature average. Warm nights pump up the average temperature, as well as the soil temperature, without any fanfare but turf managers certainly notice in terms of struggling plants and increased disease and insect pressure. 

Even though a lack of rain was occasionally difficult, we were very fortunate that July and August were below average in rainfall and we could keep soil from becoming saturated. Wet soil, flooding, and high heat are a deadly combination for turfgrass, especially in the lower parts of fairways or other areas with less than adequate drainage. Luckily, the heavy rains of May did not continue into the summer months.

The ranking chart below from the NWS report also shows 2010, 2012, and 2020 all in the top 10 of warm summers in Chicago. 2010 and 2012 were much more difficult for turf, at least at Sugar Creek, so I remember them as "hotter," but they were not as far as averages.  2020 was more of an even warmth while 2010 and 2012 contained more extremes in temperature and precipitation.

Below is from the National Weather Service

Temperature Rankings
 
All-time Top 10 Warmest Summers in Chicago (dating back to 1872)
 
                         Rank                                  Year  Mean Average Temperature (°F)
1202076.7
2195576.4
3199576.3
4201276.1
5192175.9
6194975.5
7195975.4
T8201075.2
T8197375.2
T8195375.2

Notable Statistics
 
  • The average high temperature for Summer 2020 in Chicago was 86.2°F, which was the 5th warmest average high temperature for the summer season on record behind 1988 (87.2°F), 2012 (87.0°F), 1995 (86.5°F), and 1955 (86.3°F)
  • The average low temperature for Summer 2020 in Chicago was 67.1°F, which was the 3rd warmest average low temperature for the summer season on record behind 1921 (69.7°F) and 1919 (67.8°F)
  • There were 30 days this summer in Chicago that had a high temperature of 90°F or higher, which is the 10th most such days in Chicago's history dating back to 1872
  • There were 63 days this summer in Chicago that had a high temperature of 85°F or higher, which is the most ever in Chicago's history, besting the previous top number of 61 days that occurred during the summer of 1995
  • There were 27 days this summer in Chicago that had a low temperature of 65°F or lower, which ranks as the third fewest in Chicago's history behind 1921 (20 days) and 1919 (24 days)

Tuesday, June 25, 2019

Drain Repairs

The frequent rain in May exposed many places where important drain lines were either not working or working very slowly. We tried using a drain auger but that either didn't work or made only small improvements. Once we found a restriction, we marked the spot for repair. Once the ground firmed up a bit, we were able to fix the drains. As we suspected, the problem was mostly roots.

I can see why this drain wasn't working well:


Thanks to a backhoe borrowed from Parks Department, we were able to fix them all fairly quickly and replace those sections with PVC pipe that is unlikely to be clogged with roots. The older sections uphill of them might be blocked, but these sections should be fine for a long time. It is never fun to fix an area and then have to re-fix it 2 or 3 years later. Roots are relentless!



We fixed 5 drains around the course ranging from 20 feet to 5 feet in length. They are mostly in out of the way locations:



These repairs will be most obvious the next time we have excessive amounts of rain. The water should have an easier time draining to a lower area instead of forming a temporary pond.

Thursday, May 31, 2018

Record Breaking May Precipitation



With the storms in the late afternoon on May 30th, we officially broke the record for the wettest May on record at O'Hare. Somehow the airport only received .9" of rain yesterday for a total of 8.21" for the month. At our location in Villa Park, we received 3.1" yesterday making our total for the month well over 10". Surprisingly, the course has not suffered much from all the rain this month. The storms were spaced out with dryer periods in between so the turf had a chance to recover before the next saturation. Yesterday's 3" was the most we received in one storm. While the creek did temporarily flow over its banks and flood a few areas, it receded by this morning with minimal debris left to clean up.

As wet months go, we have been lucky that the days of high heat did not come immediately after a storm. It is usually the combination of standing water, heat, and scalding sun where we see lasting turf damage. It is much easier for turf to handle a wet month in May, or any cooler month, than during June, July, and August when the temperatures are usually higher and grass is more stressed.

We saw a scene like the picture below a few times this month, but in general the course has been in great shape.

High Water
Most mornings have been more like this:




Wednesday, May 9, 2018

Finished Deck Pictures

We completed the deck three weeks ago just in time to be enjoyed in the nicer weather after our unusually cold early spring. Many people have had the chance to enjoy it since it was opened.






After completing the deck, we also rebuilt the retaining wall between the deck and the entrance. The old wall was built in 1992 and was failing. We made the bed slightly smaller and channeled the downspout through the wall to prevent it from washing out. I did not take a "before" picture, but it was not straight, level, or attractive. We moved the wall in 36 inches to allow for slightly more room to park golf carts.



Finished wall with top cap and downspout installed:



Wednesday, March 7, 2018

Deck Rebuild and Other Winter Projects

Since October, the maintenance crew has been working on rebuilding the clubhouse deck -- on days the weather allowed, at least. At first we were only going to replace the decking but after inspecting the beams things escalated quickly into a complete rebuild. We are currently about 75% complete with the project and hope to have the deck open in April.

Here are some photos from the rebuild:

New triple 2 x 12 beams
New beams and rim joist
New frame asembled

New frame on the "wrap-around" portion

Joists covered with waterproof tape
New boards and taped joists
This deck railing jig made installing the spindles and building railing sections a snap:

Deck railing jig
Here you can see some railing installed. The finished product will have a 2"x6" cap on top.


Wrap-around section complete (except for railing cap)
We have received many questions about the wood. It isn't cedar, but it looks a little like it. It is actually pressure-treated southern yellow pine treated with a pigment to mask the usual green color of treated pine. It is often called cedar-tone in stores. The cedar boards from our original deck were rotting from the bottom up so I liked the idea of a board treated on top and bottom. It is a little more difficult to work with than cedar, more prone to warping and splitting, and a little knottier, but I think it will last longer in our situation here.

In addition to the deck, the crew also completed a lot of tree pruning and the usual equipment maintenance and reel grinding.  Here is a fairway mower reel being ground on the spin grinder:


On March 5th, we also aerified the greens with bayonet tines. This produces channels in turf to facilitate root growth and gas exchange as the greens dry out. After rolling the greens, the slits are barely noticeable and the greens can be putted on immediately. 



Here are the greens after one rolling. They will receive more rolling and mowing before they get much play. By that time, the little slits will be almost invisible but I have taken core samples of them two months later that show the slits full of new roots and still a viable channel for air and moisture.

After one rolling