| Probability of Snow Crust Break |
| Wind Speed (knts) |
Probability |
| -- |
-- |
Output within each cell equates to the anticipated coverage of blizzard visibility. Output within each cell is the probability for the visibility from blowing snow to be less than 1/2sm. Based on research of past events, this probability is well correlated to the coverage of blizzard visibility. Note: the probability displayed is not the probability for advisory or warning impacts
| Impact Level |
| None |
Minimal Impacts |
| Drifting Snow |
Drifting Snow |
| Drifting/Blowing Snow |
Mainly Drifting Snow - Some Blowing Snow |
| Low |
Sporadic/Brief/Isolated Whiteout Conditions |
| Medium |
Occasional/Periods of/Scattered Whiteout Conditions |
| High |
Frequent/Constant/Widespread Whiteout Conditions |
| Headline - Wx Grids |
| Model Output |
Headline |
Wx Grid |
| 1% |
Nothing |
Patchy |
| 2-24% |
Nothing |
Patchy |
| 25-49% |
Nothing (Advisory if Significant Drifting) |
Areas |
| 50-79% |
Advisory (Warning if Significant Drifting) |
Def |
| 80-100% |
Warning |
Def [1/4 SM] |
For real-time observations and table, visit
this page.
| Constant Temperature = |
No Falling Snow (Snow Age) |
| Wind Speed |
Falling Snow |
0-3 hrs |
3-6 hrs |
6-12 hrs |
12-24 hrs |
24 + hrs |
| -- |
-- |
-- |
-- |
-- |
-- |
-- |
| -- |
-- |
-- |
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| -- |
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| -- |
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| -- |
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| -- |
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| -- |
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| -- |
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| -- |
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| -- |
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| -- |
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-- |
| Constant Wind Speed = |
No Falling Snow (Snow Age) |
| Temperature |
Falling Snow |
0-3 hrs |
3-6 hrs |
6-12 hrs |
12-24 hrs |
24 + hrs |
| -- |
-- |
-- |
-- |
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| -- |
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-- |
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