National Weather ServicePennsylvaniaLake Effect Snow AdvisoryArchive to October 1, 2026
Lake Effect Snow Advisories in Pennsylvania
The National Weather Service issued 0 lake effect snow advisories for Pennsylvania in 2025 and 8 a year on average in 2008-2025; in 2021-2025 it had the 3rd most of any state. 2026 through September: 0, 100% below the average of 4 for those months in 2008-2025. Northern Erie was covered most often (49 times since 2008).
How many lake effect snow advisories does Pennsylvania get?
Every lake effect snow advisory that covered part of Pennsylvania. 2026 is an outline: the year is not over.
The numbers
| Year | Count |
|---|---|
| 2026 (through September) | 0 |
| 2025 | 0 |
| 2024 | 0 |
| 2023 | 0 |
| 2022 | 0 |
| 2021 | 0 |
| 2020 | 0 |
| 2019 | 0 |
| 2018 | 0 |
| 2017 | 12 |
| 2016 | 24 |
| 2015 | 8 |
| 2014 | 8 |
| 2013 | 26 |
| 2012 | 8 |
| 2011 | 10 |
| 2010 | 20 |
| 2009 | 15 |
| 2008 | 20 |
Source: Iowa Environmental Mesonet archive of National Weather Service watches, warnings and advisories (VTEC); National Weather Service. Data as of October 1, 2026.
When in the year does Pennsylvania get them?
Sum of 2008-2025; the busiest month is labelled.
Source: Iowa Environmental Mesonet archive of National Weather Service watches, warnings and advisories (VTEC); National Weather Service. Data as of October 1, 2026.
Where in Pennsylvania?
| County or forecast zone | Since 2008 | Since 2023 | Last issued |
|---|---|---|---|
| Northern Erie | 49 | 0 | February 9, 2017 |
| Crawford | 44 | 0 | February 15, 2017 |
| Southern Erie | 44 | 0 | February 15, 2017 |
| Warren | 42 | 0 | February 15, 2017 |
| McKean | 35 | 0 | February 12, 2017 |
| Mercer | 19 | 0 | December 30, 2016 |
| Venango | 19 | 0 | December 30, 2016 |
| Forest | 18 | 0 | December 30, 2016 |
| Elk | 7 | 0 | December 30, 2016 |
| Susquehanna | 6 | 0 | November 20, 2016 |
| Cameron | 5 | 0 | December 30, 2016 |
| Potter | 5 | 0 | December 30, 2016 |
The NWS issues these products for counties or forecast zones; a zone can be part of a county or a mountain range.
Source: Iowa Environmental Mesonet archive of National Weather Service watches, warnings and advisories (VTEC); National Weather Service. Data as of October 1, 2026.
What is a lake effect snow advisory?
A lake effect snow advisory covered bands of lake effect snow below warning amounts. Since October 2017 the NWS issues a winter weather advisory for it. An advisory is issued for a hazard less serious than a warning that can still cause inconvenience or danger if people are not careful. The national record · Every warning type in Pennsylvania.