Northumberland County weather alerts
There are no active weather alerts for Northumberland County, PA right now.
Since 2016 the National Weather Service has issued about 857 alerts that included Northumberland County, roughly 86 a year. The most common is the severe thunderstorm warning (167 from 2016 to 2025). The last tornado warning was issued on September 1, 2026. 14 tornadoes have touched down in the county since 1950.
Updated from the National Weather Service · lists refresh hourly; the live map loads current alerts directly from the NWS
No warnings, watches or advisories include Northumberland County at the moment. This page updates automatically when the National Weather Service issues one. Check neighboring Juniata County, Schuylkill County, Lycoming County, Columbia County.
Northumberland County alert history
Alert events that included Northumberland County or its forecast zones, from the NWS warning archive.
| Alert type | 2016–2025 | 2026 | Last issued |
|---|---|---|---|
| Severe Thunderstorm Warning | 167 | 27 | October 16, 2026 |
| Flood Advisory | 113 | 0 | September 22, 2024 |
| Severe Thunderstorm Watch | 78 | 14 | October 16, 2026 |
| Winter Weather Advisory | 78 | 2 | March 3, 2026 |
| Flood Watch | 55 | 4 | September 3, 2026 |
| Dense Fog Advisory | 50 | 7 | November 6, 2026 |
| Wind Advisory | 48 | 3 | March 16, 2026 |
| Flood Warning | 42 | 1 | September 3, 2026 |
| Frost Advisory | 30 | 4 | October 7, 2026 |
| Snow Squall Warning | 24 | 2 | January 1, 2026 |
| Freeze Warning | 21 | 4 | October 18, 2026 |
| Flash Flood Warning | 20 | 2 | September 3, 2026 |
| Heat Advisory | 19 | 2 | July 14, 2026 |
| Freeze Watch | 17 | 3 | October 18, 2026 |
| Tornado Watch | 17 | 2 | March 16, 2026 |
| Winter Storm Watch | 15 | 2 | February 22, 2026 |
| Winter Storm Warning | 14 | 1 | January 25, 2026 |
| Tornado Warning | 11 | 1 | September 1, 2026 |
| Fire Weather Watch | 9 | 0 | November 16, 2024 |
| Red Flag Warning | 9 | 0 | November 8, 2024 |
| Cold Weather Advisory | 7 | 9 | February 9, 2026 |
| High Wind Warning | 3 | 0 | February 16, 2025 |
| Extreme Heat Warning | 3 | 1 | July 1, 2026 |
| High Wind Watch | 3 | 0 | November 5, 2025 |
| Extreme Heat Watch | 2 | 1 | July 1, 2026 |
| Ice Storm Warning | 2 | 0 | January 9, 2022 |
| Extreme Cold Watch | 0 | 1 | February 7, 2026 |
| Extreme Cold Warning | 0 | 1 | February 7, 2026 |
Tornado history in Northumberland County
14 tornadoes have been recorded in Northumberland County since 1950, killing 6 people and injuring 61. That ranks 34 of 67 counties in Pennsylvania. The most recent was on July 24, 2017 (rated EF0).
Strongest tornadoes in Northumberland County
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| May 31, 1985 | F3 | Lycoming County | 19 mi | 910 yd | 6 | 60 |
| September 12, 1953 | F2 | Northumberland County | 4.7 mi | 50 yd | 0 | 0 |
| August 28, 1978 | F2 | Snyder County | 3.3 mi | 50 yd | 0 | 1 |
| June 2, 1998 | F1 | Northumberland County | 15 mi | 440 yd | 0 | 0 |
| September 4, 2001 | F1 | Union County | 2.5 mi | 300 yd | 0 | 0 |
Most recent tornadoes
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| July 24, 2017 | EF0 | Northumberland County | 0.3 mi | 25 yd | 0 | 0 |
| June 30, 2015 | EF1 | Northumberland County | 1.1 mi | 100 yd | 0 | 0 |
| June 8, 2015 | EF0 | Northumberland County | 0.1 mi | 20 yd | 0 | 0 |
| May 23, 2011 | EF1 | Union County | 1.2 mi | 100 yd | 0 | 0 |
| September 4, 2001 | F1 | Union County | 2.5 mi | 300 yd | 0 | 0 |
About Northumberland County
- Population: 90,027 (2024 estimate)
- State: Pennsylvania
- NOAA Weather Radio SAME code: 042097 (how to use it)