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2018 weekly Lake Data
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 Honeoye Valley Association |
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Secchi Disk Program
The HVA has launched a volunteer Citizen Secchi Disk Program to collect water quality data at six near shore areas of the lake. This additional water clarity and surface water temperature data will complement the water quality data that is being regularly collected by the Honeoye Lake Watershed Task Force at several deep water locations. This near shore water quality data will assist us in better understanding how the lake conditions can vary due to weather conditions and different locations around the lake.
The most recent weeks near shore water clarity and temperature data is shown below:
In Lake Samplng at Deepest Point (9 meter) 2018 |
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| In Lake Samplng at Deepest Point (9 meter) 2018 | |||||||||
| Date | 7/23 | 7/30 | 8/6 | 8/13 | 8/20 | 8/27 | 9/3 | 9/12 | 9/17 | 9/24 | 10/1 | 10/8 | 10/15 |
| Day of Week | Mon | Mon | Mon | Mon | Mon | Mon | Mon | Wed | Mon | Mon | Mon | Mon | Mon |
| Secchi (m) | 1.70 | 1.70 | 1.90 | 1.40 | 1.30 | 1.20 | 1.10 | 1.20 | 1.30 | 1.40 | 1.30 | 1.30 | 1.30 |
| Secchi (feet) | 5.58 | 5.58 | 6.23 | 4.59 | 4.27 | 3.94 | 3.61 | 3.94 | 4.27 | 4.59 | 4.27 | 4.27 | 4.27 |
| Surface | |||||||||||||
| Temperature (C) | 24.9 | 25.4 | 26.1 | 25.7 | 24.3 | 24.1 | 25.2 | 22.7 | 23.3 | 21.8 | 19.1 | 18.1 | 17.0 |
| Temperature (F) | 76.8 | 77.7 | 79.0 | 78.3 | 75.8 | 75.4 | 77.4 | 72.8 | 73.9 | 71.2 | 66.4 | 64.6 | 62.6 |
| Lake Level (Feet) | 803.06 | 803.17 | 803.12 | 803.07 | 803.35 | 803.34 | 803.28 | 803.32 | 803.28 | 803.25 | 803.24 | 803.52 | 803.37 |
| In Lake Samplng at Deepest Point (9 meter) 2018 | |||||||||||
| Date | 5/16 | 5/22 | 5/28 | 6/4 | 6/11 | 6/18 | 6/25 | 7/2 | 7/9 | 7/16 | |
| Day of Week | Wed | Tue | Mon | Mon | Mon | Mon | Mon | Mon | Mon | Mon | |
| Secchi (m) | 2.50 | 2.70 | 3.80 | 3.40 | 2.40 | 3.00 | 1.80 | 2.80 | 3.80 | 2.40 | |
| Secchi (feet) | 8.20 | 8.86 | 12.47 | 11.15 | 7.87 | 9.84 | 5.91 | 9.19 | 12.47 | 7.87 | |
| Surface | |||||||||||
| Temperature (C) | 19.4 | 18.5 | 21.1 | 20.8 | 20.9 | 23.7 | 22.5 | 26.3 | 26.0 | 27.5 | |
| Temperature (F) | 66.9 | 65.3 | 70.0 | 69.5 | 69.6 | 74.7 | 72.5 | 79.4 | 78.8 | 81.6 | |
| Lake Level (Feet) | 803.35 | 803.28 | 803.19 | 803.22 | 803.15 | 803.08 | 803.10 | 803.21 | 803.11 | 803.00 | |
The Gronwall's visual BGA Update for Monday October 15th.
Monday morning (10/15), Today the blue-green algae bloom that has been
occurring appeared visually to be rapidly dissipating. No surface scum.
Surface water temperature was 62.6 F. A drop of 2.0 F over the last week.
This will be our last blue-green algae surveillance/monitoring report of
the 2018 season. Time to get our boats in winter storage and our docks &
boat hoists on shore!
| Mon. 10/8 | Mon. 10/15 | Weekly Change | |
| Surface Water Temperature (F): | 64.6 | 62.6 | -2 |
| Water Clarity (Ft): | 4.3 | 4.3 | 0 |
| Lake Level (Ft): | 803.52 | 803.37 | -0.15 |
| Lake Level Relative to Weir (Ft): | 0.02 | -0.13 | -0.15 |
The Gronwall's visual BGA Update for Monday October 8th.
Monday morning (10/8), Today the lake is still experiencing a blue-green
algae bloom. Many of our monitoring locations still had light surface scum.
Surface water temperature was 64.6 F. A drop of 1.8 F over the last week.
| Mon. 10/1 | Mon. 10/8 | Weekly Change | |
| Surface Water Temperature (F): | 66.4 | 64.6 | -1.8 |
| Water Clarity (Ft): | 4.3 | 4.3 | 0 |
| Lake Level (Ft): | 803.24 | 803.52 | 0.28 |
| Lake Level Relative to Weir (Ft): | -0.26 | 0.02 | 0.28 |
| Mon. 10/8 | Mon. 10/15 | Weekly Change | |
| Surface Water Temperature (F): | 64.6 | 62.6 | -2 |
| Water Clarity (Ft): | 4.3 | 4.3 | 0 |
| Lake Level (Ft): | 803.52 | 803.37 | -0.15 |
| Lake Level Relative to Weir (Ft): | 0.02 | -0.13 | -0.15 |
The Gronwall's visual BGA Update for Monday October 1st.
Monday morning (10/1), Today the blue-green algae bloom that has
been occurring appears to be slowly dissipating. However, we still
could see light blue-green algae in the water column. Also, many of
our monitoring locations still had light surface scum.
Fall has arrived with the surface water temperature of 66.4 F. A
drop of
4.8 F over the last week.
The Gronwall's visual BGA Update for Monday September 17th.
Monday morning (9/17), Today the blue-green algae bloom that has been
occurring for the last several weeks appeared to be subsiding. The lake had
only very light visible algae in the water column and no surface scum at all
10 of our monitoring sites. However, a few of our sites still had very
green looking water. If we get clear sunny sky conditions with clam winds
we could see the blue-green algae move back up to the surface later this
week.
We have had confirmed complete water column mixing events on August 22nd
and September 10th providing nutrients to fuel this BGA bloom.
| Wed.. 9/12 | Mon. 9/17 | Weekly Change | |
| Surface Water Temperature (F): | 72.8 | 73.9 | 1.1 |
| Water Clarity (Ft): | 3.9 | 4.3 | 0.4 |
| Lake Level (Ft): | 803.32 | 803.28 | -0.04 |
| Lake Level Relative to Weir (Ft): | -0.18 | -0.22 | -0.04 |
| Mon. 9/17 | Mon. 9/24 | Weekly Change | |
| Surface Water Temperature (F): | 73.9 | 71.2 | -2.7 |
| Water Clarity (Ft): | 4.3 | 4.6 | 0.3 |
| Lake Level (Ft): | 803.28 | 803.25 | -0.03 |
| Lake Level Relative to Weir (Ft): | -0.22 | -0.25 | -0.03 |
The Gronwall's visual BGA Update for Monday September 24th.
Monday morning (9/24), Today the blue-green algae bloom that has been
occurring for the last several weeks appeared to be more intense again. The
lake was calm at our open water site with visible light surface scum. Then
the wind came up and the rest of our monitoring sites did not have
significant surface scum. Many of our sites still had very green looking
water.
We had a strong wind generating whitecaps late Friday afternoon followed
by a thunderstorm. Saturday we went out and took a Temperature & DO profile
and confirmed another complete water column mixing event providing nutrients
to continue to fuel this blue-green algae bloom.
The Gronwall's visual BGA Update for Wednesday September 12th
Our report is delayed this week because of the rain last Monday and other
commitments we had on Tuesday.
Wednesday morning (9/12), Today the blue-green algae bloom that has
been occurring for the last four weeks appeared to be more intense. We had
calm winds this morning causing a light surface scum over many, but not all
areas of the lake.
We have had confirmed complete water column mixing events on August 22nd
and September 10th providing nutrients to fuel this BGA bloom.
| Mon. 9/3 | Wed.. 9/12 | Weekly Change | |
| Surface Water Temperature (F): | 77.4 | 72.8 | -4.6 |
| Water Clarity (Ft): | 3.6 | 3.9 | 0.3 |
| Lake Level (Ft): | 803.28 | 803.32 | 0.04 |
| Lake Level Relative to Weir (Ft): | -0.22 | -0.18 | 0.04 |
The Gronwall's visual BGA Update for Monday September 3rd
Monday morning (9/3), Today the blue-green algae bloom that has been
occurring for the last three weeks appears to be abating. However, the
water column still looked very green. No algae surface scum. With 90 F
temperatures forecasted for later this week, its important for all of us to
stay vigilante.
DEC Region 8 Honeoye Lake Fish Kill Report
"A significant fish kill on Honeoye Lake was reported on July 29th. Nine
yellow perch and one largemouth bass were collected on July 30th and
submitted to Cornell College of Veterinary Medicine. The final pathology
report suggests that bacterial infection (Aeromonas sobria, Aeromonas
hydrophila, and Plesiomonas shigelloides) was the primary cause of the fish
kill. All three are common in freshwater and often cause infections in
fish. As with all fish kills, there are always more than one factor
involved. Increasing water temperatures, low dissolved oxygen in some
portions of the lake, and algae bloom conditions may have secondarily
contributed to fish mortality."
| Mon. 8/27 | Mon. 9/3 | Weekly Change | |
| Surface Water Temperature (F): | 75.4 | 77.4 | 2 |
| Water Clarity (Ft): | 3.9 | 3.6 | -0.3 |
| Lake Level (Ft): | 803.34 | 803.28 | -0.06 |
| Lake Level Relative to Weir (Ft): | -0.16 | -0.22 | -0.06 |
The Gronwall's visual BGA Update for Monday August 27th
Monday morning (8/27), Today the blue-green algae bloom that has been
occurring for the last two weeks is still very visible. Especially along
the north shore of the Lake. The rest of the lake has only very light to
light algae in the water column withy no to light surface scum.
We had a thermocline disturbance August 8-10 followed by a complete lake
mixing event last Wednesday August 22nd due to wind and rain storms. This
will fuel our blue-green algae bloom for a while longer.
We still do not have a final report from the DEC Region 8 Fisheries
Department and Cornell University on the cause of our YOY perch fish kill.
We will share this information with you just as soon as it becomes
available.
| Mon. 8/20 | Mon. 8/27 | Weekly Change | |
| Surface Water Temperature (F): | 75.8 | 75.4 | -0.4 |
| Water Clarity (Ft): | 4.3 | 3.9 | -0.4 |
| Lake Level (Ft): | 803.35 | 803.34 | -0.01 |
| Lake Level Relative to Weir (Ft): | -0.15 | -0.16 | -0.01 |
The Gronwall's visual BGA Update for Monday August 20th
Monday morning (8/20), There was a noticeable reduction in blue-green
algae from last Monday 8/13. However, several of our blue-green algae
monitoring sites had very green colored water indicating the presence of
blue-green algae. We did not observe any surface algae scum.
We have been able to confirm that we had a thermocline disturbance August
8-10. This would have mixed nutrient rich deep water with surface water
fueling the current blue-green algae bloom.
We still do not have a final report from the DEC Region 8 Fisheries
Department and Cornell University on the cause of our YOY perch fish kill.
We will share this information with you just as soon as it becomes
available.
| Mon. 8/13 | Mon. 8/20 | Weekly Change | |
| Surface Water Temperature (F): | 78.3 | 75.8 | -2.5 |
| Water Clarity (Ft): | 4.6 | 4.3 | -0.3 |
| Lake Level (Ft): | 803.07 | 803.35 | 0.28 |
| Lake Level Relative to Weir (Ft): | -0.43 | -0.15 | 0.28 |
The Gronwall's visual BGA Update for Monday August 6th
Monday morning (8/6), Today all of our surveillance/monitoring sites had
no to light algae in the water column with no surface scum. However, last
weekend there were a few isolated locations along the NW shore that had
suspicions algae blooms.
We do not have a final report from the DEC Region 8 Fisheries Department
and Cornell University on the cause of last week's YOY perch fish kill. We
will share this information with you when it becomes available.
| Mon. 7/30 | Mon. 8/6 | Weekly Change | |
| Surface Water Temperature (F): | 77.7 | 79 | 1.3 |
| Water Clarity (Ft): | 5.6 | 6.2 | 0.6 |
| Lake Level (Ft): | 803.17 | 803.12 | -0.05 |
| Lake Level Relative to Weir (Ft): | -0.33 | -0.38 | -0.05 |
The Gronwall's visual BGA Update for Monday July 30th
Monday morning (7/30), We had a complete lake mixing event last Tuesday
July 24th which mixed the nutrient rich deep water with the surface water.
This caused several isolated near shore BGA blooms starting last Thursday.
Today most of our surveillance/monitoring sites had light algae in the water
column with light surface scum. A few near shore locations still had a fair
amount of surface algae scum.
We have experienced a lake wide YOY perch fish kill over most of the lake
starting Sunday (7/29). DEC Region 8 Fisheries collected dying perch
samples for testing by Cornell's Fish Pathology Department today. It will
take several weeks before the Cornell test results are available. We will
keep you posted.
| Mon. 7/23 | Mon. 7/30 | Weekly Change | |
| Surface Water Temperature (F): | 76.8 | 77.7 | 0.9 |
| Water Clarity (Ft): | 5.6 | 5.6 | 0 |
| Lake Level (Ft): | 803.06 | 803.17 | 0.11 |
| Lake Level Relative to Weir (Ft): | -0.44 | -0.33 | 0.11 |
The Gronwall's visual BGA Update for Monday July 23rd
Monday morning (7/23), The Gleotrichia bloom we reported last Monday
7/16 appears to have run its course. All of our surveillance/monitoring
sites had no visible algae to only very light algae in the water column with
no surface scum. Water clarity has decreased by ~2.3 feet from last Monday
7/16. Water clarity today was 5.6 feet. Surface water temperature was 76.8
F.
| Mon. 7/16 | Mon. 7/23 | Weekly Change | |
| Surface Water Temperature (F): | 81.6 | 76.8 | -4.8 |
| Water Clarity (Ft): | 7.9 | 5.6 | -2.3 |
| Lake Level (Ft): | 803.00 | 803.06 | 0.06 |
| Lake Level Relative to Weir (Ft): | -0.50 | -0.44 | 0.06 |
The Gronwall's visual BGA Update for Monday July 16th
Monday morning (7/16), Many of our surveillance/monitoring sites showed
signs of a Gleotrichia bloom, but a few of our sites were almost completely
algae free. Sandy Bottom Park Swimming beach has been closed due to
concerns about this bloom. Water clarity has decreased by ~4.6 feet from
last Monday 7/9. Water clarity today was 7.9 feet. Surface water
temperature was 81.6 F.
This blue-green algae species gets its nutrients directly from the
shallow water bottom sediments. Shallow areas that do not have good water
circulation could collect Gleotrichia in more dense quantities.
| Mon. 7/9 | Mon. 7/16 | Weekly Change | |
| Surface Water Temperature (F): | 78.8 | 81.6 | 2.8 |
| Water Clarity (Ft): | 12.5 | 7.9 | -4.6 |
| Lake Level (Ft): | 803.11 | 803.00 | -0.11 |
| Lake Level Relative to Weir (Ft): | -0.39 | -0.50 | -0.11 |
The Gronwall's visual BGA Update for Thursday July 12th
Thursday afternoon (7/12), The Gleotrichia in the water column became
more dense in some small isolated near shore areas today. Today's very
calm wind and bright sunny sky brought it up to the water surface. This
blue-green algae species gets its nutrients directly from the shallow water
bottom sediment.
Other near shore areas had very clear almost algae free conditions.
The Gronwall's visual BGA Update for Monday July 10:
Monday morning (7/10), All of our surveillance/monitoring sites showed
no signs of a BGA bloom.
Only very light to light algae in the water column. Water clarity has
increased by 3.3 feet from last
Monday 7/2. Today it was 12.5 feet. Surface water temperature decreased by
0.6 F to 78.8 F.
We are observing light Gleotrichia in the water column. This blue-green
algae species gets its
nutrients directly from the shallow water bottom sediments. Shallow areas
that do not have good
water circulation could collect Gleotrichia in more dense quantities.
Always use your own visual assessment before making contact with the lake
water at this time of
year as the blue-green algae situation can change daily if not hourly. The
DEC will report on their
assessment of our blue-green algae bloom situation for this week late Friday
afternoon on their BGA
| Mon. 7/2 | Mon. 7/9 | Weekly Change | |
| Surface Water Temperature (F): | 79.4 | 78.8 | -0.6 |
| Water Clarity (Ft): | 9.2 | 12.5 | 3.3 |
| Lake Level (Ft): | 803.21 | 803.11 | -0.1 |
| Lake Level Relative to Weir (Ft): | -0.29 | -0.39 | -0.1 |
The Gronwall's visual BGA Update for Monday July 2nd:
Monday morning (7/2), all of our surveillance/monitoring sites showed no
> signs of a BGA bloom. Only very light to light algae in the water column.
> Water clarity has increased by 3.3 feet from last Monday 6/25. Today it was
> 9.2 feet. Surface water temperature increased by ~7 F to 79.4 F.
>
> The weather forecast for this week continues to be for high temperatures
> in the 90's F. These high temperatures could trigger a rapid change in lake
> conditions.
| Mon. 6/25 | Mon. 7/2 | Weekly Change | |
| Surface Water Temperature (F): | 72.5 | 79.4 | 6.9 |
| Water Clarity (Ft): | 5.9 | 9.2 | 3.3 |
| Lake Level (Ft): | 803.10 | 803.21 | 0.11 |
| Lake Level Relative to Weir (Ft): | -0.40 | -0.29 | 0.11 |
Monday morning (6/25), all of our surveillance/monitoring sites showed
no signs of a BGA bloom. Only very light algae in the water column.
However, our water clarity reading has declined 3.9' from last Monday.
Water clarity today was 5.9'.
The weather forecast for this coming weekend is for high temperatures in
the 90's F. These high temperatures could trigger a rapid change in lake
conditions.
| Mon. 6/18 | Mon. 6/25 | Weekly Change | |
| Surface Water Temperature (F): | 74.7 | 72.5 | -2.2 |
| Water Clarity (Ft): | 9.8 | 5.9 | -3.9 |
| Lake Level (Ft): | 803.08 | 803.10 | 0.02 |
| Lake Level Relative to Weir (Ft): | -0.42 | -0.40 | 0.02 |
The Gronwall's visual BGA Update for Monday June 18th:
Monday morning (6/18), Water clarity has increased about ~2 feet over
the last week. Water temperature has increased ~5 F over the last week.
All of our surveillance/monitoring sites showed no signs of a BGA bloom.
Water amazingly clear today like it is in mid-May.
Always use your own visual assessment before making contact with the lake
water at this time of year as the blue-green algae situation can change
daily if not hourly. The DEC will report on their assessment of our
blue-green algae bloom situation for this week late Friday afternoon on
their BGA alert web page.
| Mon. 6/11 | Mon. 6/18 | Weekly Change | |
| Surface Water Temperature (F): | 69.6 | 74.7 | 5.1 |
| Water Clarity (Ft): | 7.9 | 9.8 | 1.9 |
| Lake Level (Ft): | 803.15 | 803.08 | -0.07 |
| Lake Level Relative to Weir (Ft): | -0.35 | -0.42 | -0.07 |
The Gronwall's visual BGA Update for Monday June 11th:
Monday morning (6/11), Water clarity has declined about 3.3 feet over
the last week. Currently 7.9 feet. Most of our surveillance/monitoring
sites showed no signs of a BGA bloom. A few of our sites had very light to
light algae visible in the water column. This was a significant improvement
from last week.
Working with Cornell University we determined that we had a very strong
(20-25 MPH) south wind on May 30 & 31. The lake was stratified and anoxic
on May 28th. Cornell's thermistor temperature data every meter from the
surface to the bottom confirmed that we had a thermocline disturbance
(underwater waves/rocking thermocline) on May 30 & 31. We feel that this
was the source of nutrients that fueled last week BGA bloom.
| Mon. 6/4 | Mon. 6/11 | Weekly Change | |
| Surface Water Temperature (F): | 69.5 | 69.6 | 0.1 |
| Water Clarity (Ft): | 11.2 | 7.9 | -3.3 |
| Lake Level (Ft): | 803.22 | 803.15 | -0.07 |
| Lake Level Relative to Weir (Ft): | -0.28 | -0.35 | -0.07 |
The Gronwall's visual BGA Update for Monday June 4th:
Monday morning (6/4), water clarity was still very good at 11.2 feet.
Most of our surveillance/monitoring sites showed no signs of a blue-green
algae bloom yet. However, two sites had sparse small green algae
dots/clumps and one near shore site had a moderate amount of green
filamentous algae visible in the water column.
Always use your own visual assessment before making contact with the lake
water at this time of year as the blue-green algae situation can change
daily if not hourly. The DEC will report on their assessment of our
blue-green algae bloom situation for this week late Friday afternoon on
their BGA alert web page.
| Honeoye Lake Data | |||
| Mon. 5/28 | Mon. 6/4 | Weekly Change | |
| Surface Water Temperature (F): | 70 | 69.5 | -0.5 |
| Water Clarity (Ft): | 12.5 | 11.2 | -1.3 |
| Lake Level (Ft): | 803.19 | 803.22 | 0.03 |
| Lake Level Relative to Weir (Ft): | -0.31 | -0.28 | 0.03 |
The Gronwall's visual BGA Update for Monday May 28th:
Monday morning (5/28), we saw no visible blue-green algae in the
surface water at all of our monitoring sites. The water clarity was an
exceptional 12.5 feet.
We have had a couple reports of blue-green algae blooms in the last few
days that were actually duck weed, a small aquatic plant, that floats on the
surface and sort of looks like a blue-green algae bloom.
We have started collecting at least 3 water samples a week for blue-green
algae testing by SUNY ESF. If any of these samples test above the NYSDEC
blue-green algae bloom criteria they will report that on Friday.
Always use your own visual assessment before making contact with the
lake water at this time of year as the blue-green algae situation can
change daily if not hourly.
| Tue. 5/22 | Mon. 5/28 | Weekly Change | |
| Surface Water Temperature (F): | 65.3 | 70 | 4.7 |
| Water Clarity (Ft): | 8.9 | 12.5 | 3.6 |
| Lake Level (Ft): | 803.28 | 803.19 | -0.09 |
| Lake Level Relative to Weir (Ft): | -0.22 | -0.31 | -0.09 |