The big commuting question for Tuesday is not "if" it will snow, but when. Forecasters with the National Weather Service expect some light snow showers through 10 a.m. that could affect the morning commute especially in outlying areas where roads have not been treated. The real mess could end up being early to mid-afternoon when heavier snow is forecast to fall across the metro area and into the Willamette Valley.

Some snow is already being reported in western Washington County as of 6:30 a.m.

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SUNNYSIDE 8:51 a.m.; Crash blocks the left lane of I-205 northbound near the Sunnyside exit.

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SUNSET 8:40 a.m.; Disabled vehicle partially blocking the right lane of U.S. 26 westbound near the zoo.



Update 8:50 a.m.; Cleared.

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TRIMET 8:38 a.m.; TriMet reports lines 18, 51, 63 are canceled due to road conditions. Some buses are running with chains. Plan extra time and check trimet.org/alerts before you go.



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GRESHAM 8:25 a.m.; Possible injury crash on Northeast Halsey Street near Glendoveer Golf Course.



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BANFIELD 7:58 a.m.; ODOT is with a stall I-84 westbound under the Halsey Street overpass. Right emergency lane blocked.



Update 8:21 a.m.; Cleared.

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FOREST GROVE 7:52 a.m.; An SUV has crashed into a power pole on Southwest Pacific Avenue between C and E streets. No injuries but the street is closed there.



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TIGARD 7:05 a.m.; Crash involving a pedestrian on Southwest Hall Boulevard and McDonald Street.

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WASHINGTON COUNTY 6:53 a.m.; Dispatchers have already listed about three rural crashes due to snow; two in Forest Grove, one in Hillsboro. Be ready for slick conditions this morning.



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We are responding to multiple morning commute crashes- please slow down as the roads are becoming snow covered #pdxtraffic #alert pic.twitter.com/xfFcXYfSnf — WCSO Oregon (@WCSOOregon) February 20, 2018

PBOT crews applied nearly 5,500 gallons of de-icer overnight into Tuesday morning. All of the major routes are treated including all of downtown Portland, all the city bridges and overpasses.

For those who would rather leave their car or bike at home (not a bad idea at all), TriMet is ready with MAX trains running on schedule Tuesday morning and buses all on regular routes.

When snow does begin to fall, some buses will return to garages for chains. TriMet said in a release that more than half the bus fleet is equipped with drop-down chains. But in some conditions, heavier types of chains are needed and could cause delays for installation. Also remember that snow typically causes huge traffic jams in Portland and that will also delay bus schedules, even if it's only a small amount of snow.

Riders should expect delays in the case of winter weather and check trimet.org/alerts before heading out.

Check here for a list of school closures/delays.

Check back throughout the morning for the latest commuting updates and follow us on Twitter: @trafficportland