Penobscot County weather alerts
There are no active weather alerts for Penobscot County, ME right now.
Since 2016 the National Weather Service has issued about 1,181 alerts that included Penobscot County, roughly 118 a year. The most common is the winter weather advisory (221 from 2016 to 2025). The last tornado warning was issued on July 17, 2025. 13 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 Penobscot County at the moment. This page updates automatically when the National Weather Service issues one. Check neighboring Aroostook County, Washington County, Hancock County, Waldo County.
Penobscot County alert history
Alert events that included Penobscot County or its forecast zones, from the NWS warning archive.
| Alert type | 2016–2025 | 2026 | Last issued |
|---|---|---|---|
| Winter Weather Advisory | 221 | 13 | April 5, 2026 |
| Severe Thunderstorm Warning | 193 | 18 | August 28, 2026 |
| Flood Advisory | 104 | 3 | June 12, 2026 |
| Dense Fog Advisory | 98 | 10 | November 4, 2026 |
| Wind Advisory | 81 | 4 | October 6, 2026 |
| Winter Storm Warning | 73 | 4 | March 11, 2026 |
| Winter Storm Watch | 65 | 4 | March 11, 2026 |
| Frost Advisory | 55 | 7 | September 24, 2026 |
| Cold Weather Advisory | 43 | 4 | March 2, 2026 |
| Flood Watch | 42 | 2 | June 14, 2026 |
| Flood Warning | 33 | 1 | March 18, 2026 |
| Heat Advisory | 27 | 4 | August 7, 2026 |
| Freeze Warning | 20 | 0 | October 10, 2025 |
| Severe Thunderstorm Watch | 18 | 0 | September 6, 2025 |
| High Wind Watch | 16 | 0 | December 12, 2024 |
| High Wind Warning | 15 | 1 | March 17, 2026 |
| Snow Squall Warning | 13 | 0 | December 21, 2025 |
| Flash Flood Warning | 12 | 0 | July 11, 2024 |
| Fire Weather Watch | 10 | 0 | September 16, 2020 |
| Red Flag Warning | 8 | 0 | May 22, 2020 |
| Extreme Cold Warning | 7 | 1 | January 24, 2026 |
| Blizzard Warning | 6 | 0 | March 21, 2024 |
| Freeze Watch | 6 | 0 | October 10, 2025 |
| Tornado Warning | 4 | 0 | July 17, 2025 |
| Extreme Cold Watch | 3 | 1 | January 24, 2026 |
| Extreme Heat Warning | 3 | 0 | June 24, 2025 |
| Tropical Storm Watch | 2 | 0 | September 13, 2023 |
| Ice Storm Warning | 1 | 0 | January 12, 2020 |
| Tropical Storm Warning | 1 | 0 | September 14, 2023 |
| Extreme Heat Watch | 1 | 1 | July 2, 2026 |
Tornado history in Penobscot County
13 tornadoes have been recorded in Penobscot County since 1950, injuring 3 people. That ranks 3 of 16 counties in Maine. The most recent was on August 5, 2017 (rated EF1).
Strongest tornadoes in Penobscot County
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| June 30, 1971 | F2 | Penobscot County | 13.3 mi | 10 yd | 0 | 0 |
| November 7, 1971 | F2 | Penobscot County | 5.1 mi | 10 yd | 0 | 0 |
| August 16, 1959 | F2 | Penobscot County | 2 mi | 27 yd | 0 | 0 |
| November 7, 1971 | F2 | Penobscot County | 0.1 mi | 17 yd | 0 | 0 |
| July 24, 2001 | F1 | Penobscot County | 16 mi | 75 yd | 0 | 1 |
Most recent tornadoes
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| August 5, 2017 | EF1 | Penobscot County | 2.5 mi | 33 yd | 0 | 0 |
| June 2, 2010 | EF0 | Penobscot County | 2.5 mi | 500 yd | 0 | 0 |
| July 24, 2001 | F1 | Penobscot County | 16 mi | 75 yd | 0 | 1 |
| August 27, 1997 | F0 | Penobscot County | 0.1 mi | 20 yd | 0 | 0 |
| June 28, 1991 | F1 | Penobscot County | 0.7 mi | 50 yd | 0 | 0 |
About Penobscot County
- Population: 156,840 (2024 estimate)
- State: Maine
- NOAA Weather Radio SAME code: 023019 (how to use it)