Frost Monitoring

Legend:
wind below 7 km/h
wind between 7 km/h and 13 km/h
wind greater than 13 km/h
Station Timestamp Temperature (2') (˚C) Temperature (8') (˚C) Leaf Sensor Temps (˚C) Wind Speed (km/h)
Haskett Fri, May 9, 2025 1:57 AM 2.13 3.83 4.21
North Fri, May 9, 2025 1:54 AM 2.71 2.71 0, 0.5, 2.5 0.01
Paczy Fri, May 9, 2025 1:54 AM 4.89 4.89 0.6, 1.1, 3 3.45
Schooley Fri, May 9, 2025 2:00 AM 1.63 2.27 1.1 0.05
SFL Culown No recent updates N/A N/A N/A, 0.3, 1.7 N/A
SFL Home Fri, May 9, 2025 1:57 AM 3.48 2.47 1.8 2.67
SFL Lorimer Fri, May 9, 2025 1:54 AM 1.79 2.47 2.09, 2.77 2.01
SFL Rajtrowski Fri, May 9, 2025 1:57 AM 2.35 2.59 2.62
SFL Zavitz Fri, May 9, 2025 1:57 AM 2.45 3.23 -0.3, N/A 0
Suncrest Fri, May 9, 2025 1:57 AM 3.3 4.2 0.1, 2.2 1.11
Waterford Fri, May 9, 2025 1:54 AM 2.41 2.41 1.6, -0.5 0.18
Weslan Fri, May 9, 2025 1:57 AM 2.43 2.43 1.5, 0.8 1.33

Weather Forecast

Fetching weather…

Apple Minimum Temperatures

Silver tip Green tip ½ inch Green Tight Cluster First Pink Full Pink First Bloom Full Bloom Petal Fall
10% kill -9.4 -7.8 -5.0 -2.8 -2.2 -2.2 -2.2 -2.2 -2.2
90% kill -16.7 -12.2 -9.4 -6.1 -4.4 -3.9 -3.9 -3.9 -3.9

Critical Spring Temperatures in °C for Apples

Tart Cherry Minimum Temperatures

Swollen Bud Side Green Green Tip Tight Cluster Open Cluster First White First Bloom Full Bloom Petal Fall
10% kill -9.4 -4.4 -3.3 -3.3 -2.2 -2.2 -2.2 -2.2 -2.2
90% kill -17.7 -12.2 -5.5 -4.4 -4.4 -4.4 -4.4 -4.4 -4.4

Critical Spring Temperatures in °C for Tart Cherries

Wind Machines

  • Do not operate wind machines if wind speeds are much higher than 7 km/h as there is unlikely to be a strong temperature inversion or warmer air above the field anyway.
  • Do not operate wind machines if wind speeds are 13 km/h or higher, as this can damage their long, thin blades.
  • Never operate wind machines if wind speeds are 21 km/h or higher, as this can seriously damage them.

Overhead Irrigation

  • Must be started before the temperature reaches freezing, if running, start above 1 degree C.
  • Must stay on until temperatures return to above freezing
  • Wind can result in worse frost damage than if we had done nothing, if winds are likely to get above 20 km/hour through the freezing event we probably should not turn on the irrigation system.
  • If freezing event is past 12 hours we probably should not irrigate as the ponds may run out of water and ice buildup could cause extensive damage