WPC Probabilistic Winter Precipitation Guidance
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Precipitation Type Forecast Product Forecast Duration





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24-Hour Probability of Snow Accumulating ≥ 1"
  Day 1   Day 2   Day 3
Valid for the 24-hour
period ending: 		00Z Wed
Dec 01 		06Z Wed
Dec 01 		12Z Wed
Dec 01 		18Z Wed
Dec 01 		00Z Thu
Dec 02 		06Z Thu
Dec 02 		12Z Thu
Dec 02 		18Z Thu
Dec 02 		00Z Fri
Dec 03
24-Hour Probability of Snow Accumulating ≥ 2"
  Day 1   Day 2   Day 3
Valid for the 24-hour
period ending: 		00Z Wed
Dec 01 		06Z Wed
Dec 01 		12Z Wed
Dec 01 		18Z Wed
Dec 01 		00Z Thu
Dec 02 		06Z Thu
Dec 02 		12Z Thu
Dec 02 		18Z Thu
Dec 02 		00Z Fri
Dec 03
24-Hour Probability of Snow Accumulating ≥ 4"
  Day 1   Day 2   Day 3
Valid for the 24-hour
period ending: 		00Z Wed
Dec 01 		06Z Wed
Dec 01 		12Z Wed
Dec 01 		18Z Wed
Dec 01 		00Z Thu
Dec 02 		06Z Thu
Dec 02 		12Z Thu
Dec 02 		18Z Thu
Dec 02 		00Z Fri
Dec 03
24-Hour Probability of Snow Accumulating ≥ 6"
  Day 1   Day 2   Day 3
Valid for the 24-hour
period ending: 		00Z Wed
Dec 01 		06Z Wed
Dec 01 		12Z Wed
Dec 01 		18Z Wed
Dec 01 		00Z Thu
Dec 02 		06Z Thu
Dec 02 		12Z Thu
Dec 02 		18Z Thu
Dec 02 		00Z Fri
Dec 03
24-Hour Probability of Snow Accumulating ≥ 8"
  Day 1   Day 2   Day 3
Valid for the 24-hour
period ending: 		00Z Wed
Dec 01 		06Z Wed
Dec 01 		12Z Wed
Dec 01 		18Z Wed
Dec 01 		00Z Thu
Dec 02 		06Z Thu
Dec 02 		12Z Thu
Dec 02 		18Z Thu
Dec 02 		00Z Fri
Dec 03
24-Hour Probability of Snow Accumulating ≥ 12"
  Day 1   Day 2   Day 3
Valid for the 24-hour
period ending: 		00Z Wed
Dec 01 		06Z Wed
Dec 01 		12Z Wed
Dec 01 		18Z Wed
Dec 01 		00Z Thu
Dec 02 		06Z Thu
Dec 02 		12Z Thu
Dec 02 		18Z Thu
Dec 02 		00Z Fri
Dec 03
24-Hour Probability of Snow Accumulating ≥ 18"
  Day 1   Day 2   Day 3
Valid for the 24-hour
period ending: 		00Z Wed
Dec 01 		06Z Wed
Dec 01 		12Z Wed
Dec 01 		18Z Wed
Dec 01 		00Z Thu
Dec 02 		06Z Thu
Dec 02 		12Z Thu
Dec 02 		18Z Thu
Dec 02 		00Z Fri
Dec 03
Viewing Options
Choose an accumulation for the specified time:







OR
Choose a 24-hour period for the specified amount:
00Z Dec 01
06Z Dec 01
12Z Dec 01
18Z Dec 01
00Z Dec 02
06Z Dec 02
12Z Dec 02
18Z Dec 02
00Z Dec 03
Map Overlays
 
Opacity (%): 0 20 40 60 80 100
 
 
(Note: The GRIB2 download page contains 4 directories corresponding to the accumulation period of the forecast)
 
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