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WPC Probabilistic Winter Precipitation Guidance
Product Selection
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48-Hour Probability of Snow Accumulating ≥ 2"
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Day 2
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Day 3
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Valid for the 48-hour
period ending:
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12 UTC
Wed Sep 11
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18 UTC
Wed Sep 11
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00 UTC
Thu Sep 12
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06 UTC
Thu Sep 12
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12 UTC
Thu Sep 12
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48-Hour Probability of Snow Accumulating ≥ 4"
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Day 2
|
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Day 3
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Valid for the 48-hour
period ending:
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12 UTC
Wed Sep 11
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18 UTC
Wed Sep 11
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00 UTC
Thu Sep 12
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06 UTC
Thu Sep 12
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12 UTC
Thu Sep 12
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48-Hour Probability of Snow Accumulating ≥ 8"
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Day 2
|
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Day 3
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Valid for the 48-hour
period ending:
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12 UTC
Wed Sep 11
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18 UTC
Wed Sep 11
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00 UTC
Thu Sep 12
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06 UTC
Thu Sep 12
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12 UTC
Thu Sep 12
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48-Hour Probability of Snow Accumulating ≥ 12"
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Day 2
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Day 3
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Valid for the 48-hour
period ending:
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12 UTC
Wed Sep 11
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18 UTC
Wed Sep 11
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00 UTC
Thu Sep 12
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06 UTC
Thu Sep 12
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12 UTC
Thu Sep 12
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48-Hour Probability of Snow Accumulating ≥ 18"
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Day 2
|
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Day 3
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Valid for the 48-hour
period ending:
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12 UTC
Wed Sep 11
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18 UTC
Wed Sep 11
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00 UTC
Thu Sep 12
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06 UTC
Thu Sep 12
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12 UTC
Thu Sep 12
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48-Hour Probability of Snow Accumulating ≥ 24"
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Day 2
|
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Day 3
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Valid for the 48-hour
period ending:
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12 UTC
Wed Sep 11
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18 UTC
Wed Sep 11
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00 UTC
Thu Sep 12
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06 UTC
Thu Sep 12
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12 UTC
Thu Sep 12
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48-Hour Probability of Snow Accumulating ≥ 30"
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Day 2
|
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Day 3
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Valid for the 48-hour
period ending:
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12 UTC
Wed Sep 11
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18 UTC
Wed Sep 11
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00 UTC
Thu Sep 12
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06 UTC
Thu Sep 12
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12 UTC
Thu Sep 12
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48-Hour Snow Accumulation Probability Forecasts
Valid 12 UTC Mon September 9 - 12 UTC Wed September 11
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| Threshold: |
≥ 2 inches
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≥ 4 inches
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≥ 8 inches
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≥ 12 inches
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≥ 18 inches
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≥ 24 inches
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≥ 30 inches
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48-Hour Snow Accumulation Probability Forecasts
Valid 18 UTC Mon September 9 - 18 UTC Wed September 11
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| Threshold: |
≥ 2 inches
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≥ 4 inches
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≥ 8 inches
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≥ 12 inches
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≥ 18 inches
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≥ 24 inches
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≥ 30 inches
|
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48-Hour Snow Accumulation Probability Forecasts
Valid 00 UTC Tue September 10 - 00 UTC Thu September 12
|
| Threshold: |
≥ 2 inches
|
≥ 4 inches
|
≥ 8 inches
|
≥ 12 inches
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≥ 18 inches
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≥ 24 inches
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≥ 30 inches
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48-Hour Snow Accumulation Probability Forecasts
Valid 06 UTC Tue September 10 - 06 UTC Thu September 12
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| Threshold: |
≥ 2 inches
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≥ 4 inches
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≥ 8 inches
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≥ 12 inches
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≥ 18 inches
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≥ 24 inches
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≥ 30 inches
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48-Hour Snow Accumulation Probability Forecasts
Valid 12 UTC Tue September 10 - 12 UTC Thu September 12
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| Threshold: |
≥ 2 inches
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≥ 4 inches
|
≥ 8 inches
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≥ 12 inches
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≥ 18 inches
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≥ 24 inches
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≥ 30 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 48-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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weather.gov 
