One product issued by NWS for: 12 Miles ESE Mount St Helens WA
Winter Weather Advisory
URGENT - WINTER WEATHER MESSAGE National Weather Service Portland OR 150 PM PDT Tue Mar 18 2025 .Two back-to-back winter systems will move over the region through Saturday morning. The first will arrive late Wednesday through Thursday. This system will bring snow to the Cascades and breezy winds. The second system will arrive on Friday. This frontal passage is warmer but will continue to be evaluated in regards to future advisories or warnings. WAZ211-191215- /O.UPG.KPQR.WS.A.0005.250320T0000Z-250322T0600Z/ /O.NEW.KPQR.WW.Y.0016.250320T0000Z-250321T0000Z/ South Washington Cascades- Including the cities of Mt. St. Helens, Larch Mountain, and Indian Heaven Wilderness 150 PM PDT Tue Mar 18 2025 ...WINTER WEATHER ADVISORY IN EFFECT FROM 5 PM WEDNESDAY TO 5 PM PDT THURSDAY... * WHAT...Snow expected. Total snow accumulations up to 11 inches. * WHERE...South Washington Cascades. * WHEN...From 5 PM Wednesday to 5 PM PDT Thursday. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. * ADDITIONAL DETAILS...There is around a 20% chance that snow accumulation would exceed 12 inches at elevations above 4000 feet. For this scenario to occur, colder air would need to be present than what is forecast. This first system will be closely followed by a second frontal system so there may be minimal break between them. PRECAUTIONARY/PREPAREDNESS ACTIONS... Have a winter emergency driving kit readily available. Common items to include: flashlight, batteries, blankets, a shovel, water, non-perishable food items, tire chains, etc. Be aware that walking surfaces may be slick. Walk with extra care. For the latest road conditions and chain restrictions in Oregon, call 5 1 1, or visit: www.tripcheck.com. For the latest road conditions and chain restrictions in Washington, visit: wsdot.com/travel/real-time/map && $$ For more information from the National Weather Service visit www.weather.gov/portland 27