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WPC Probabilistic Winter Precipitation Guidance
Product Selection
24-Hour Probability of Snow Accumulating ≥ 1"
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Day 1
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Day 2
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Day 3
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Valid for the 24-hour period ending:
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00 UTC Sat Dec 19
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06 UTC Sat Dec 19
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12 UTC Sat Dec 19
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18 UTC Sat Dec 19
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00 UTC Sun Dec 20
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06 UTC Sun Dec 20
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12 UTC Sun Dec 20
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18 UTC Sun Dec 20
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00 UTC Mon Dec 21
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24-Hour Probability of Snow Accumulating ≥ 2"
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Day 1
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Day 2
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Day 3
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Valid for the 24-hour period ending:
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00 UTC Sat Dec 19
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06 UTC Sat Dec 19
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12 UTC Sat Dec 19
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18 UTC Sat Dec 19
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00 UTC Sun Dec 20
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06 UTC Sun Dec 20
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12 UTC Sun Dec 20
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18 UTC Sun Dec 20
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00 UTC Mon Dec 21
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24-Hour Probability of Snow Accumulating ≥ 4"
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Day 1
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Day 2
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Day 3
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Valid for the 24-hour period ending:
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00 UTC Sat Dec 19
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06 UTC Sat Dec 19
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12 UTC Sat Dec 19
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18 UTC Sat Dec 19
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00 UTC Sun Dec 20
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06 UTC Sun Dec 20
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12 UTC Sun Dec 20
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18 UTC Sun Dec 20
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00 UTC Mon Dec 21
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24-Hour Probability of Snow Accumulating ≥ 6"
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Day 1
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Day 2
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Day 3
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Valid for the 24-hour period ending:
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00 UTC Sat Dec 19
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06 UTC Sat Dec 19
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12 UTC Sat Dec 19
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18 UTC Sat Dec 19
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00 UTC Sun Dec 20
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06 UTC Sun Dec 20
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12 UTC Sun Dec 20
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18 UTC Sun Dec 20
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00 UTC Mon Dec 21
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24-Hour Probability of Snow Accumulating ≥ 8"
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Day 1
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Day 2
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Day 3
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Valid for the 24-hour period ending:
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00 UTC Sat Dec 19
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06 UTC Sat Dec 19
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12 UTC Sat Dec 19
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18 UTC Sat Dec 19
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00 UTC Sun Dec 20
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06 UTC Sun Dec 20
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12 UTC Sun Dec 20
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18 UTC Sun Dec 20
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00 UTC Mon Dec 21
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24-Hour Probability of Snow Accumulating ≥ 12"
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Day 1
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Day 2
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Day 3
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Valid for the 24-hour period ending:
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00 UTC Sat Dec 19
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06 UTC Sat Dec 19
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12 UTC Sat Dec 19
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18 UTC Sat Dec 19
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00 UTC Sun Dec 20
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06 UTC Sun Dec 20
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12 UTC Sun Dec 20
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18 UTC Sun Dec 20
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00 UTC Mon Dec 21
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24-Hour Probability of Snow Accumulating ≥ 18"
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Day 1
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Day 2
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Day 3
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Valid for the 24-hour period ending:
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00 UTC Sat Dec 19
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06 UTC Sat Dec 19
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12 UTC Sat Dec 19
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18 UTC Sat Dec 19
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00 UTC Sun Dec 20
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06 UTC Sun Dec 20
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12 UTC Sun Dec 20
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18 UTC Sun Dec 20
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00 UTC Mon Dec 21
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24-Hour Snow Accumulation Probability Forecasts
Valid 00 UTC Fri December 18 - 00 UTC Sat December 19
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Threshold: |
≥ 1 inch
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≥ 2 inches
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≥ 4 inches
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≥ 6 inches
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≥ 8 inches
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≥ 12 inches
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≥ 18 inches
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24-Hour Snow Accumulation Probability Forecasts
Valid 06 UTC Fri December 18 - 06 UTC Sat December 19
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Threshold: |
≥ 1 inch
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≥ 2 inches
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≥ 4 inches
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≥ 6 inches
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≥ 8 inches
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≥ 12 inches
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≥ 18 inches
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24-Hour Snow Accumulation Probability Forecasts
Valid 12 UTC Fri December 18 - 12 UTC Sat December 19
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Threshold: |
≥ 1 inch
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≥ 2 inches
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≥ 4 inches
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≥ 6 inches
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≥ 8 inches
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≥ 12 inches
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≥ 18 inches
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24-Hour Snow Accumulation Probability Forecasts
Valid 18 UTC Fri December 18 - 18 UTC Sat December 19
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Threshold: |
≥ 1 inch
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≥ 2 inches
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≥ 4 inches
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≥ 6 inches
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≥ 8 inches
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≥ 12 inches
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≥ 18 inches
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24-Hour Snow Accumulation Probability Forecasts
Valid 00 UTC Sat December 19 - 00 UTC Sun December 20
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Threshold: |
≥ 1 inch
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≥ 2 inches
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≥ 4 inches
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≥ 6 inches
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≥ 8 inches
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≥ 12 inches
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≥ 18 inches
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24-Hour Snow Accumulation Probability Forecasts
Valid 06 UTC Sat December 19 - 06 UTC Sun December 20
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Threshold: |
≥ 1 inch
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≥ 2 inches
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≥ 4 inches
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≥ 6 inches
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≥ 8 inches
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≥ 12 inches
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≥ 18 inches
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24-Hour Snow Accumulation Probability Forecasts
Valid 12 UTC Sat December 19 - 12 UTC Sun December 20
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Threshold: |
≥ 1 inch
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≥ 2 inches
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≥ 4 inches
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≥ 6 inches
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≥ 8 inches
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≥ 12 inches
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≥ 18 inches
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24-Hour Snow Accumulation Probability Forecasts
Valid 18 UTC Sat December 19 - 18 UTC Sun December 20
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Threshold: |
≥ 1 inch
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≥ 2 inches
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≥ 4 inches
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≥ 6 inches
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≥ 8 inches
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≥ 12 inches
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≥ 18 inches
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24-Hour Snow Accumulation Probability Forecasts
Valid 00 UTC Sun December 20 - 00 UTC Mon December 21
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Threshold: |
≥ 1 inch
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≥ 2 inches
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≥ 4 inches
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≥ 6 inches
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≥ 8 inches
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≥ 12 inches
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≥ 18 inches
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Viewing Options
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Choose an accumulation for the specified time:
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OR
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Choose a 24-hour period for the specified amount:
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(Note: The GRIB2 download page contains 4 directories corresponding to the accumulation period of the forecast)
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