Portland, Oregon weather forecast for Wednesday, April 8

PORTLAND, Ore. (KOIN) — Say goodbye to nice hot weather for a while.

Let’s do Thursday’s reading and keep this memory. We reached 75° at the PDX, which is 15 degrees above normal. And further south it was 86° in Roseburg! Now compare that to Southern California’s long list of record temperatures. Long Beach, California, soared to 100°. Oddly enough, Death Valley was cooler than Southern California beaches and just 7° warmer than Portland (83°).

Thunderstorms are expected this afternoon. Your chance of encountering thunderstorms increases north of a line from Portland to Tillamook. Rainfall totals predicted for Portland today are rather lackluster, only about 0.12″. Daytime highs will be considerably cooler by 20° today, peaking in the mid 50s.

The likelihood of snow at lower elevations increases on Saturday evening. Friday avalanche forecast: moderate to weak for Mount Hood.

These mammatus clouds were spotted Thursday over Hillsboro. This is an indication of active upward and downward air currents.

THE WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 PM FRIDAY TO 11 PM PDT SATURDAY ABOVE 3000 FEET…

* WHAT… Snow forecast above 3000 feet. Total snow accumulation up to 12 inches with higher amounts at the ridges. Winds blowing up to 45 mph.

* WHERE… East Slopes of the Washington Cascades.

* WHEN… Friday 5:00 p.m. to Saturday 11:00 p.m. PDT.

* IMPACTS… Travel could be very difficult. Hazardous conditions could impact the evening commute. Strong winds could knock down tree branches.

PRECAUTIONARY MEASURES/PREPARATION… Slow down and exercise caution when traveling.

https://forecast.weather.gov/wwamap/wwatxtget.php?cwa=PQR&wwa=winter%20weather%20advisory

Is lowland snow in April impossible? No. It’s already arrived. Let’s look at downtown Portland and Portland International Airport. The last recorded snowfall of the season was April 12, 1890 (T). At Portland International Airport, the last measurable snowfall was March 25, 1965. (A debate about April 19, 1968: possibly hail and not snow. The low temperature that day was 34, the high of 50.)

THE WIND ADVISORY REMAINS IN EFFECT FROM 5:00 PM TO 11:00 PM PDT FRIDAY.

* WHAT…Northwest winds around 30 mph with gusts up to 50 mph associated with the passage of a strong cold front.

* WHERE… Baker County.

* WHEN… 5:00 p.m. to 11:00 p.m. PDT Friday.

* IMPACTS… Gusty winds could blow unsecured objects. Tree branches could be knocked down and power outages could result.

* ADDITIONAL DETAILS… Blowing dust may reduce visibility.

https://forecast.weather.gov/showsigwx.php?warnzone=ORZ062&warncounty=ORC001&firewxzone=ORZ646&local_place1=9%20Miles%20ESE%20Baker%20City%20OR&product1=Wind+Advisory&lat=44.7117&lon=-117.6716#.Yk_sHsjMKUk

Dale D. Schrum