FastCast--Wednesday, April 17 to Sunday, April 21:
After a couple showery and cooler days on Monday and Tuesday, a warmup and transition to mostly sunny conditions is expected through Friday. Wednesday morning will be quite chilly across the region, with lows in the low to mid 30s in the lowlands. Afternoon highs will reach the mid 50s in the north to the upper 50s to low 60s in the south. Lows on Thursday morning will reach the upper 30s, followed by highs region-wide reaching the low to mid 60s. Friday will be the nicest day of this stretch, with highs reaching the upper 60s across the region, with sunny skies. Clouds and a chance of showers return on Saturday, with highs likely dropping back to the upper 50s to low 60s. Sunday looks to be partly cloudy, with highs again in the upper 50s to low 60s. Expect morning lows from Friday to Sunday to be in the low to mid 40s.
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Continue reading the full blog below!
Cooler and showery weather will soon be replaced by a few days of sunshine, with temperatures warming each day through Friday. However, before we get there, we will have a chilly morning, with frost possible across some parts of the region. Let's take a look at the forecast!
Below is the NWS NBM model forecast for low temperatures on Wednesday morning.
Expect lows in the lowlands to reach the low to mid 30s, likely coldest from Tacoma southward. Eastern Washington will also have lows in the low to mid 30s, coldest in the Palouse and near the Cascades. Any frost that forms at this time of year can damage sensitive plants. If you have sensitive plants, be sure to move them inside for Wednesday morning's lows, and for Thursday morning's lows in Eastern Washington.
Under mostly sunny skies, Wednesday will be warmer than Tuesday was, as seen below on the NWS NBM forecast.
Expect highs across Western Washington to reach the upper 50s to low 60s, with some areas remaining in the mid 50s. The Willamette Valley will reach the low to mid 60s, while Eastern Washington will reach the mid 50s around Spkane and the Palouse and the low to mid 60s in the Columbia Basin.
Further warming is expected on Thursday, as seen in the NWS NBM forecast below.
On Thursday, expect highs in Western Washington to reach the low to mid 60s, with the Willamette Valley reaching the upper 60s to low 70s. Eastern Washington will be a bit slower to warm up, with highs in the mid 50s around Spokane and the mid 60s in the Columbia Basin.
Finally, let's take a look at highs on Friday, which will be the warmest day of the week.
Friday will be quite nice across Western Washington, with highs reaching the mid to upper 60s (possibly the low 70s in the metro areas). The Willamette Valley will reach the low to mid 70s, while Eastern Washington warms up to the mid 50s to upper 60s.
The best thing about Wednesday, Thursday, and Friday is that skies will be almost 100% clear, save for some areas of morning clouds, especially along the coast. What is causing these clear skies and warmer days? Take a look at the European model forecast below.
Notice a large ridge of high pressure over Alaska and Northwestern Canada, with troughing over the Midwest US, and a subtle ridge over the Northwest. That ridge, in combination with the larger-scale pattern, is bringing our brief warm spell.
Stay tuned for more information about the weekend forecast and what's ahead next week!
This is the kind of forecast I like to read.
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