Description: Polylines advising of the estimated warning time for lahars of 10,000,000 to 100,000,000 cubic meters of volume, based on fastest estimated travel time. This data is used to estimate evacuation time for people within the volcanic hazard area. Read the full metadata for more information about the time zones (https://matterhorn.co.pierce.wa.us/GISmetadata/pdbplan_volcanic_time_of_travel.html). Any data download constitutes acceptance of the Terms of Use (https://matterhorn.co.pierce.wa.us/Disclaimer/PierceCountyGISDataTermsofUse.pdf).