Do not drive vehicles through flooded areas. The water depth or fast flowing water/mud/debris from a flash flood will make road conditions unsafe. Do not rely soley on data presented here or other third-party websites - always check your official national and local weather service agency website, socials, radio and/or TV stations for making critical decisions related to weather events.
Please carefully read each posted Warning and Alert as it relates to the area(s) being affected. We may provide a wider range of issued severe weather warnings for surrounding cities and counties, so some alerts may not directly impact this location. This is done to help with preparing for severe weather that may overlap or be heading towards Duncannon.
Use the Radar Maps link provided to understand the trajectory of a storm.
State: PATotal alerts: 3Updated: Feb 17, 2026 6:55am EST
Dense Fog Advisory
Area Schuylkill
Dense Fog Advisory issued February 17 at 2:28AM EST until February 17 at 9:00AM EST by NWS State College PA
* WHAT...Visibility one quarter mile or less in dense fog.
* WHERE...Schuylkill County.
* WHEN...Until 9 AM EST this morning.
* IMPACTS...Low visibility could make driving conditions hazardous.
* ADDITIONAL DETAILS...Visibility below one tenth of a mile will
impact parts of the Interstate 81 corridor.
Dense Fog Advisory
Area Lebanon
Dense Fog Advisory issued February 17 at 2:28AM EST until February 17 at 9:00AM EST by NWS State College PA
* WHAT...Visibility one quarter mile or less in dense fog.
* WHERE...Lebanon County.
* WHEN...Until 9 AM EST this morning.
* IMPACTS...Low visibility could make driving conditions hazardous.
* ADDITIONAL DETAILS...Visibility below one tenth of a mile will
impact parts of the Interstate 81 and 78 corridor.
Air Quality Alert
Area Dauphin; Lebanon; Cumberland; York; Lancaster
Air Quality Alert issued February 16 at 3:30PM EST by NWS State College PA
The Pennsylvania Department of Environmental Protection has
issued a Code ORANGE Air Quality Alert on Tuesday for the
Susquehanna Valley.
A Code ORANGE Air Quality Alert means that air pollution
concentrations within the region may become unhealthy for
sensitive groups. Sensitive groups include children, people
suffering from asthma, heart disease or other lung diseases,
and the elderly. The effects of air pollution can be minimized
by avoiding strenuous activity or exercise outdoors.
For more information on ground-level ozone and fine particles,
visit http://www.airnow.gov and http://www.aqpartners.state.pa.us.
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Duncannon weather report and traffic updates by locals
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