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Make your own prediction about the sap run based on your knowledge and weather conditions.

As you know, the right weather conditions must be present to provide us with a strong sap flow. Select the combination of weather conditions from the table below that YOU think will produce a sap flow.  
What do your friends think?

When you think you have an idea, click on your choice in the table and see how the conditions you selected compare with the predictions of Sugarbush Larry.

     

Now, check the weather forecast for tomorrow, record the information, and then return to this page.

Will there be a sap run tomorrow?

What are the prospects for the next few days?

 

Use the table and what you have learned to make a prediction.

You can visit this page regularly to see how your predictions compare with the report of recent sap flows.

Return to the Classroom in the Sugarbush.


Will it Run Today?

Representative temperatures are listed across the top. Conditions regarding cloud cover and precipitation are listed along the side. Find the square that best corresponds to the current temperature and weather conditions. Make your prediction as to whether or not there will be a run. Check your prediction by clicking on "Sap Run" or "No Run". The correct answer will be listed at the top of your screen.

 High Today

Low Last Night

 25F (-4C)

12 (-11C)

34 (1C)

15 -(9C)

 45 (7C)

20 (-7C)

 60 (16C)

25 (-4C)

 56 (13C)

35 (2C)

 67 (19C)

45 (7C)

 Sunny

Sap Run

No Run

 Sap Run

No Run

 Sap Run

No Run

 Sap Run

No Run

 Sap Run

No Run

 Sap Run

No Run

 Cloudy

Sap Run

No Run

 Sap Run

No Run

 Sap Run

No Run

 Sap Run

No Run

 Sap Run

No Run

 Sap Run

No Run

 Rain  Too cold to rain

 Sap Run

No Run

 Sap Run

No Run

 Sap Run

No Run

 Sap Run

No Run

 Sap Run

No Run

 Snow

 Sap Run

No Run

 Sap Run

No Run

 Too warm for snow  Too warm for snow  Too warm for snow  Too warm for snow

 

 You're Right! There will be a Run 1  Return to Table  Sunny.Lo 20-Hi 45. Temperatures below freezing followed by a warm-up with sunny conditions will create a run. Temperatures are bit on the cool side, howver.
 You're Right. There will be no sap flow today 2  Return to Table  Sunny. Lo 12- Hi 25. It's too cold today to expect any sap even though there is sunshine. We'll need temperatures above freezing to cause a run.
 Sorry. Call the Crew. 3 You will have sap today.  Return to Table  Sunny. Lo 20-Hi 45. 45 may seem a bit chilly for a day-time high, but with the sunshine it is warm enough to create a run
 Sorry. There will be no sap today 4  Return to Table  Sunny. Lo12-Hi 25. It's too cold today to expect any sap even though there is sunshine. We'll need temperatures above freezing to cause a run. 
 Sorry. There will be no sap today5  Return to Table  Cloudy. Lo 15-Hi 34.Temperatures are above freezing but not by much. The cloudy conditions prevent any warming by the sun. Call off the gathering crew. 
 You're Right. There will be no sap flow today 6  Return to Table   Cloudy. Lo 15-Hi 34.Temperatures are above freezing but not by much. The cloudy conditions prevent any warming by the sun.
 You may be right about seeing some sap today 7  Return to Table Rain. Lo 20-Hi 45.There is a reasonable chance of seeing some flow because temperatures went from below to above freezing. Rainy conditions mean a falling barometer which will help the flow. Absence of sunshine will hamper flow. Make sure the buckets are covered.
 You may be right about not seeing a run 8  Return to Table  Rain. Lo 20-Hi 45. Temperatures have gone well above freezing but if conditions are raw and rainy, the flow may be minimal. This one is a tough call.
 Sorry. There will be no sap flow today 9  Return to Table   Cloudy. Lo 12- Hi 25. Regardless of the cloud conditions, temperatures are too cold to permit a run.
 You're Right. There will be no sap flow today 10  Return to Table  Cloudy. Lo 12- Hi 25. It's too cold for a run.
 Sorry. There will be no sap flow today11  Return to Table Snow. Lo 12- Hi 25. Although you can sometimes get a run in the middle of a snowstorm, it won't happen today at these cold temperatures
 You're Right. There will be no sap flow today 12  Return to Table Snow. Lo 12- Hi 25. It's too cold for a run, and cloudy, snowy conditions do not help. Be sure you have your buckets empty so the sap does not freeze and break the buckets
 Sorry. There will be no sap flow today13  Return to Table  Rain. Lo 15-Hi 34. Temperatures are barely above freezing, and any rain will likely be in the form of freezing rain. Such raw, cold conditions will not produce any sap.
 You're Right. There will be no sap flow today 14  Return to Table   Rain. Lo 15-Hi 34. Temperatures are barely above freezing, and the rain will be in the form of freezing rain. Such raw, cold conditions will not produce any sap.
 Sorry. There will be no sap flow today 15  Return to Table  Snow. Lo 15-Hi 34. Nearly freezing temperatures are accompanied by snow. Such raw, cold conditions will not produce any sap
 You're Right. There will be no sap flow today16  Return to Table Snow. Lo 15-Hi 34. Nearly freezing temperatures are accompanied by snow. Such raw, cold conditions will not produce any sap
 Sorry. There will be no sap flow today17  Return to Table  Sunny. Lo 15-Hi 34. We'll probably see a few drops at peak temperature for the day, but temperatures are too near freezing to produce any appreciable flow even with the bright sunshine.
 You're Right. There will be no sap flow today18  Return to Table  Sunny. Lo 15-Hi 34. We might see a few drops at peak temperature for the day, but temperatures are too near freezing to produce any appreciable flow even with the bright sunshine.
 Yes, look for some flow, but it may be disappointing19  Return to Table   Cloudy. Lo 20-Hi 45. It's warm enough (45) for a run, but cloudy conditions mean that it will be on the raw, cool side. You may get some flow, but it won't be the greatest.
 You may be right. The run today may be hardly worth gathering 20  Return to Table   Cloudy. Lo 20-Hi 45. Cloudy, raw conditions may make for a poor flow even though the temperatures are well above freezing. A falling barometer will help.
 Yes! You're going to have a booming run21  Return to Table  Sunny. Lo 25-Hi 60. Perfect conditions. Night-time temps. dropped below freezing, and the daytime high accompanied with bright sunshine is very warm. Get the auxiliary storage tank ready. You're going to have to boil all night to keep up!!
 Sorry. Call the Crew. 3 You will have sap today 22  Return to Table  Sunny. Lo 25-Hi 60. With conditions like this there will be all kinds of sap!! Remember, overnight temperatures below freezing followed by sunshine and a big warm-up represent near perfect conditions for a run.
You're right. There will be a run today even if it is cloudy 23  Return to Table   Cloudy. Lo 25-Hi 60. There is such a dramatic rise in temperature from below freezing to 60F that even with the clouds, there will be a big run. You will need a freeze again, however, to keep the run going.
 Sorry. Call the Crew. 3 You will have sap today 24  Return to Table  Cloudy. Lo 25-Hi 60. These are nearly ideal conditions for a big run even without the sunshine.
 You're right. It will run today even in the rain 25  Return to Table Rain. Lo 25-Hi 60. You have the right conditions of freeze followed by a warm-up. The combination of freeze followed by rain is unusual but it could happen. Be certain your buckets are covered to keep out the rain water.
 Sorry. Call the Crew. 3 You will have sap today26  Return to Table Rain. Lo 25-Hi 60. It may be raining and overcast, but the jump in temperature from below to well above freezing will give you a big run. Cover your buckets to keep out the rain water.
 Yes you might get some run if it has been cool earlier27  Return to Table  Sunny. Lo 35-Hi 56. If the past several days included freezing temperatures, you might get some sap, but flow will likely diminish in a day or so if it does not freeze again.
 You may be right about little or no sap 28  Return to Table   Sunny. Lo 35-Hi 56. Even with the sunshine, without the overnight freezing temperatures the flow will cease soon.
 Sorry. You are not going to see any run 29  Return to Table   Cloudy. Lo 35-Hi 56. Skies are overcast and temperatures are above freezing. There is insufficient sunshine or temperature variation to stimulate a flow.
 You're right, there won't be a run today 30  Return to Table  Cloudy. Lo 35-Hi 56. Skies are overcast and temperatures are above freezing. There is insufficient sunshine or temperature variation to stimulate a flow.
 Sorry. You are not going to see any run 31  Return to Table Rain. Lo 35-Hi 56. Rainy conditions with no sunshine or significant temperature change are conditions that will not stimulate any flow
 You're right, there won't be a run today 32  Return to Table Rain. Lo 35-Hi 56. Rainy conditions with no sunshine or significant temperature change are conditions that will not stimulate any flow
 Sorry, you will not see any flow under these conditions33  Return to Table  Sunny. Lo 45-Hi 67. Bright sunshine and temperatures in this range for even a few days will signal the end of the season. Begin looking for wildflowers such as the Harbinger of Spring.
 You're right, there won't be a run today 34  Return to Table  Sunny. Lo 45-Hi 67. Bright sunshine and temperatures in this range for even a few days will signal the end of the season. Begin looking for wildflowers such as the Harbinger of Spring
  Sorry, you will not see any flow under these conditions 35  Return to Table   Cloudy. Lo 20-Hi 45. Persistent temperatures in this range signal the beginning of spring. The season is over.
 You're right, there won't be a run today 36  Return to Table  Cloudy. Lo 45-Hi 67. Persistent temperatures in this range regardless of the cloud cover signal the beginning of spring. The season is over
 Sorry, you will not see any flow under these conditions 37  Return to Table Rain. Lo 45-Hi 67. Persistent temperatures in this range with rain signal the beginning of spring. The season is over
 You're right, there won't be a run today 38  Return to Table Rain. Lo 45-Hi 67. Persistent temperatures in this range with rain signal the beginning of spring. The season is over.
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