Post-Tropical Cyclone Helene continues to weaken; however, moderate to heavy rainfall and flooding will continue through Monday over parts of the Ohio/Tennessee Valleys and portions of the Appalachians and Mid-Atlantic States. Dry and windy conditions will support elevated to critical fire weather conditions over the next few days across portions of the northern and central Plains. Read More >
Snow Amount Potential
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Expected Snowfall - Official NWS Forecast (for time range indicated) What's this? | High End Amount 1 in 10 Chance (10%) of Higher Snowfall What's this? |
Low End Amount 9 in 10 Chance (90%) of Higher Snowfall What's this? |
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Percent Chance That Snow Amounts Will Be Greater Than...
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Snowfall Totals by Location
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Ice Accumulation Potential |
Expected Ice Accumulation - Official NWS Forecast |
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Snow Amount Potential
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Expected Snowfall - Official NWS Forecast What's this? | High End Amount 1 in 10 Chance (10%) of Higher Snowfall What's this? |
Low End Amount 9 in 10 Chance (90%) of Higher Snowfall What's this? |
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Percent Chance That Snow Amounts Will Be Greater Than...
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Other Snow/Ice Information | ||
Storm Track | Onset of Wintry Precipitation (For areas under Warning or Advisory) |
Winter Storm Severity Index |
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Observed Snow/Ice Amounts | ||
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Useful Winter Weather Information | ||
Historic Mid-Atlantic Winter Storms |
Winter/Snowfall Statistics |
El Niño and DC/Baltimore Winters |
Watches, Warnings, & Advisories |
How to Measure Snow |
La Niña and DC/Baltimore Winters |
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At Home | On the Road | Outside in the Cold |
Winter Storm Threat: 3-7 Days From Now Experimental - Leave feedback What's this? Product Description Document |
Hover over (or click) Days 3-7 thumbnails to see full-size maps showing daily Confidence vs. Potential Impact matrices. |
Day 3 | Day 4 | Day 5 | Day 6 | Day 7 |
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High | High threat of high impact winter storm. Potential impacts include significant travel delays, closures, and threats to life and property. Plan ahead to minimize impact on you and your family. |
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Moderate | Moderate winter storm threat. Potential impacts include significant travel delays and closures. Plan ahead to minimize impact on you and your family. |
Enhanced | Enhanced winter storm threat. Increased potential of more significant travel impacts and more closures. |
Slight | Slight winter storm threat. If threat materializes, may cause travel disruptions. |
None | No significant winter storm threat is currently expected. However, light wintry precipitation may still be possible. |
Maryland Ice Accumulation Forecast | ||
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