WPC Probabilistic Winter Precipitation Guidance

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WPC Probabilistic Winter Precipitation Guidance

Notice: On November 30, 2026, this webpage will be discontinued. The same forecast data is available on our modernized Probabilistic Precipitation Portal.

Product Selection

24-Hour Probability of Snow Accumulating ≥ 1"
	Day 1				Day 2				Day 3
Valid for the 24-hour period ending:	12 UTC Fri Nov 06	18 UTC Fri Nov 06	00 UTC Sat Nov 07	06 UTC Sat Nov 07	12 UTC Sat Nov 07	18 UTC Sat Nov 07	00 UTC Sun Nov 08	06 UTC Sun Nov 08	12 UTC Sun Nov 08

24-Hour Probability of Snow Accumulating ≥ 2"
	Day 1				Day 2				Day 3
Valid for the 24-hour period ending:	12 UTC Fri Nov 06	18 UTC Fri Nov 06	00 UTC Sat Nov 07	06 UTC Sat Nov 07	12 UTC Sat Nov 07	18 UTC Sat Nov 07	00 UTC Sun Nov 08	06 UTC Sun Nov 08	12 UTC Sun Nov 08

24-Hour Probability of Snow Accumulating ≥ 4"
	Day 1				Day 2				Day 3
Valid for the 24-hour period ending:	12 UTC Fri Nov 06	18 UTC Fri Nov 06	00 UTC Sat Nov 07	06 UTC Sat Nov 07	12 UTC Sat Nov 07	18 UTC Sat Nov 07	00 UTC Sun Nov 08	06 UTC Sun Nov 08	12 UTC Sun Nov 08

24-Hour Probability of Snow Accumulating ≥ 6"
	Day 1				Day 2				Day 3
Valid for the 24-hour period ending:	12 UTC Fri Nov 06	18 UTC Fri Nov 06	00 UTC Sat Nov 07	06 UTC Sat Nov 07	12 UTC Sat Nov 07	18 UTC Sat Nov 07	00 UTC Sun Nov 08	06 UTC Sun Nov 08	12 UTC Sun Nov 08

24-Hour Probability of Snow Accumulating ≥ 8"
	Day 1				Day 2				Day 3
Valid for the 24-hour period ending:	12 UTC Fri Nov 06	18 UTC Fri Nov 06	00 UTC Sat Nov 07	06 UTC Sat Nov 07	12 UTC Sat Nov 07	18 UTC Sat Nov 07	00 UTC Sun Nov 08	06 UTC Sun Nov 08	12 UTC Sun Nov 08

24-Hour Probability of Snow Accumulating ≥ 12"
	Day 1				Day 2				Day 3
Valid for the 24-hour period ending:	12 UTC Fri Nov 06	18 UTC Fri Nov 06	00 UTC Sat Nov 07	06 UTC Sat Nov 07	12 UTC Sat Nov 07	18 UTC Sat Nov 07	00 UTC Sun Nov 08	06 UTC Sun Nov 08	12 UTC Sun Nov 08

24-Hour Probability of Snow Accumulating ≥ 18"
	Day 1				Day 2				Day 3
Valid for the 24-hour period ending:	12 UTC Fri Nov 06	18 UTC Fri Nov 06	00 UTC Sat Nov 07	06 UTC Sat Nov 07	12 UTC Sat Nov 07	18 UTC Sat Nov 07	00 UTC Sun Nov 08	06 UTC Sun Nov 08	12 UTC Sun Nov 08

Viewing Options

Choose an accumulation for the specified time:

Choose a 24-hour period for the specified amount:

12Z Nov 06
18Z Nov 06
00Z Nov 07
06Z Nov 07
12Z Nov 07
18Z Nov 07
00Z Nov 08
06Z Nov 08
12Z Nov 08

Map Overlays

State Boundaries

Information about these products

Download GRIB2 Probability Guidance

(Note: The GRIB2 download page contains 4 directories corresponding to the accumulation period of the forecast)

Download latest KML files

**Information about the KML files available for download (Click to show/hide)**

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