Finally, some weather action is on the horizon. It’s been a very slow Fall weatherwise. The first 40 days were bone dry with lots of sun; of course that’s nice when it’s still warm! Then around October 11th the rains moved in. We had some early season snow in the Cascades before Halloween. Remember the base totals up around 20-30 inches? The warmer rain around Halloween washed that away. Now the first half of November has been real dead. We can’t even get a gusty east wind out of the Gorge! Probably no one complaining about that one though.
Now it appears we have a change towards a stormier westerly or southwest jet stream type pattern. One in which we get numerous storms moving in from one of those two directions.
The 12z ECMWF and the 00z GFS are both very wet from Saturday through the middle of next week. Both have more typical (for November) deep surface lows tracking near the Pacific Northwest coast at times. This is a pattern in which we can get strong wind at the coastline and sometimes inland as well. Something to keep an eye on. Right now I don’t see anything that makes me think “WINDSTORM 2012!”
Once we get to Sunday and Monday, all eyes will be on the Cascades for two reasons; skiing and travel. Next week is a big travel week of course with Thanksgiving right around the corner. The 00z GFS came in quite warm later Monday and Tuesday as a cold upper trough briefly amplifies well offshore. If so, 24 hours of heavy rain could delay ski area openings beyond a week from Friday (the day after Thanksgiving). Otherwise, all other models seem to point to plenty of snow in the Cascades Saturday through next week.
Speaking of wind and windstorms, I’m giving my usual post-winter wrapup this Saturday at the AMS meeting at OMSI. I just finished the presentation. One of the slides is below. What’s been missing here in western Oregon lately? I still think we are overdue for a windstorm. We haven’t seen a southerly gust above 53 mph in 12 years!!! Now from about 1995 to 2006 ASOS anemometers (the instruments at airports) were using a 5 second gust, which meant a bit lower speeds than before and after that time. For example, in the 1995 storm the ASOS measured 62 mph, but the old, shorter gust recorder at PDX recorded 74 mph. For the purposes of this graph though, even sub-53mph speeds for 12 years seems like a long stretch. Will this be the winter? We’ll see. The good news is that most likely we’ll see it coming days ahead of time; as with the 2006, 2000, and 1995 storms. The only windstorm that has sneaked up on us in the past 20 years is the “South Valley Surprise” of 2002.
Chief Meteorologist Mark Nelsen
Does anyone know what the weather will be like in eugene for the 5 pm game saturday…stanford oregon game…..GO DUCKS!!!
I think with the strong east wind tonight we should see some dense fog forming. Then tomorrow, the isotherms show that the CAPE should allow for some middle evlation snowstorms. Then on Saturday we should see highs around 70. Still thinking the gas is hinting at an arctic breakout sometime mid December.
What the…?
0_0 ?
Hahahaha, that was awesome. Someone is poking fun at us.
Sounds like a forecast from a certain duo over at KATU!
BWAAHAHAHA!!! That’s funny, right there… 😆
Very dense fog on west side of bull mountain. .10 of a mile. I haven’t seen it this thick in a long time
NWS still on board for a windy storm.
National Weather Service Portland or
230 PM PST Wednesday Nov 14 2012
Behind the front…expect a brief break during the day sun with the next front pushing onshore Sun night into Monday. This front looks stronger than the previous one and model agreement is good at this point that strong winds will be a significant threat along coastal
regions…and potentially some inland areas as well.
I could go for a bit of bluster 🙂
18Z GFS shows significant wind event for at least the coast on Monday afternoon next week. It may smell like a Christmas tree lot outside come Monday night. —
Still a ways out…and I am not trying to imply a windstorm…merely just the first windy storm of the fall…a windy storm and a windstorm are two different things in my mind. 18Z at face value has winds probably more in WA than OR…nothing more than gusts in 40s inland.
Agreed. Monday Night Willamette Valley: 925mb winds nearly 70mph and 850mb winds now over Hurricane Force. Along the Coast: Nearly 100mph at 925mb at Astoria. That will make some noise….
But a windstorm, is a significant wind event. Hahaah!
35-45mph valleys, 60-80mph Coast..
Hmmmm, Rob with soaked ground and heavy rains coming, that wind might be causing some issues.
Biggest question, will the NWS name it!
It’s not official til Steve Pierce chimes in!
The NWS won’t name it. The Weather Channel is in charge of that. 😆
How about The Civil War Week Storm? The low barometric pressure will deflate the footballs, causing the Ducks to fumble repeatedly and throw numerous interceptions!!!
Mom just noticed the clouds are coming from the NE and it’s a lot sunnier in the last 15mins then it was all morning long.
I helped dad rake a lot and I mean a LOT of leaves. Raking was going on before when we had the Fire Advisory October 2012.
?
hmm..
I was looking at Microfilm for January 1949 and just the 1st half of the month alone the entire US nation was having weird fits of weather.
Hard Freezes in Los Angeles. Artic Cold In the Northwest. Heatwaves in the Dakotas in between crippling blizzards blocking trains and isolating entire towns.
Heavy snow hitting the NE with heavy rain in the SE.
If CNN were around in the 1940s reporting the weather they would pass out with too many stories to tell.
CNN is a horrible source for weather, BTW.
Kyle, take a look back at historical data for Los Angeles, January 1949. There were only two nights that dropped below freezing, 28F on 1/4 and 31F on 1/10 — nowhere near “hard freeze” territory. Daytime temperatures, albeit below average, still rebounded into the mid-50s to upper-60s through that whole period.
This should help: http://weatherspark.com/#!dashboard;ws=30699
Man I wish I was living here in the mid 40s thru the late 50s as the whole nation was having weird bouts of weather pretty often.
Despite the fact the 40s were pretty snowless for Portland the nighttime minimums were much more colder then recent times.
Down in Eugene there would be a weeks worth of upper teens/low at least once a month minimum during the winter months and quite a bit of cases more though usually bone dry.
Huh?
????
12z WRF 4km cross section shows a brief bout of offshore winds http://www.atmos.washington.edu/mm5rt/data/current_gfs/images_d3/kpdx.th.gif
Nothing much just 25-30kts 925-975mb.
The real story is the abrupt change to a dominant south-southwesterly wind. http://www.atmos.washington.edu/mm5rt/data/current_extended/images_d2/kpdx.x.th.gif
30-40kts down to 975mb and 50-60kts 950-900mb.
How high is 925-975mb in feet? 5-8K? Serious answers only. Thanks! I don’t want any YA style crap. Thanks! 🙂
P.S I looked up conversions and couldn’t find any for MB and feet. I’ll try once again.
Kyle 925mb is roughly 2000ft iirc.
2498′ http://www.eustis.army.mil/weather/Weather_Products/wxconversions.htm
Doesn’t it depend on the current barometric (atmospheric) pressure at the time? Or is that just splitting hairs…..
It can fluctuate between 2000-2500′ it depends
12z ECMWF
http://www.cascadeaccess.com/~mnelsen/Models/ecmwf500mb_ecmwf.html
Pretty good windstorm pattern coming….
Hmm. Not sure but this looks several days out and we can count on model shifting by then. (If i go against the idea then maybe it may happen)
6z GFS ratchets things up further in regards to a possible Wind Event/storm Monday night. It shows a strong jet core slamming into the Coast. Much stronger winds down to 925mb of 65-70+mph and over Hurricane force at 850mb.
Extracted Data
http://wxweb.meteostar.com/sample/sample.shtml?text=kttd
12z GFS begins in 3 hours 26 minutes.
Not seeing a surface low tracking favorably or good pressure rises, so probably a situation with a strong warm/cold front mixing winds down towards the surface… Maybe 12z continues things….
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PORTLAND OR
339 AM PST WED NOV 14 2012
A PACIFIC FRONT WILL APPROACH ON FRIDAY. THE MODELS HAVE SLOWED THE TIMING OF THIS FRONT AND NOW EXPECT MOSTLY DRY …BUT CLOUDY WEATHER FRIDAY. THERE MAY BE A FEW LIGHT SHOWERS ALONG THE COAST AHEAD OF THE FRONT FRIDAY AFTERNOON…BUT THE MORE SUBSTANTIAL AND STEADY RAIN IS EXPECTED TO REACH THE COAST LATE FRIDAY NIGHT. MODELS HAVE BEEN TRENDING TOWARDS STRONGER WINDS WITH THE FRONT AND EXPECT STRONG GUSTS ALONG THE COAST…COASTAL HEADLANDS… AND POSSIBLY IN THE SOUTHERN WILLAMETTE VALLEY FRIDAY NIGHT AND SATURDAY MORNING.
Am not sure what to think of south valley winds with this…perhaps should issue a Blowing Wal-Mart Plastic Bag Advisory for this system. Does look stronger than recent fronts though. Long range looking a bit energetic.
00z WRF 925mb/SLP model
Monday – 10:00 PM
We need to look at several factors. 984mb(29.06 in) low into Tatoosh Island/NW Tip of Washington. It is still intensifying on its approach, in fact it still deepens as it moves inland peaking around 982mb in southern British Columbia, so that’s a good thing. It’s kind of baggy with a loose circulation around 130W, but it tightens up inside 127-128 W all the way to landfall, another good sign. The gradient couplet responds to this thus compacting adding a few more millibars, another benefit. The low is not stalling either maintaining its forward speed. However the track is a bit off as it intersects 130 W around 45 N. Would rather see that further south around 43 N or so. The gradient contours align themselves pretty good, but not perfectly perpendicular as I’d want to see. 300mb jet fueling the low is only seen at 70-90kts as it punches into the Coast. Would like to see that stronger. This wouldn’t be a wind storm, perhaps a High Wind Warning along the Coast and northern Interior of Washington(Bellingham) but inland just gusty winds and maybe squeaking out a Wind Advisory. Still it is a good sign for active weather, we just need a few more things to come together.
Rob – Southeast Portland says:
November 12, 2012 at 5:58 pm
I think we’re about to see the models turn more active including fun la-la land teases by late week or this weekend. Don’t quote me on that, no wait, go ahead.
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A good opportunity for a wind storm coming.
This isn’t intended to sound pushy, but I’m curious when we can expect another Northwest Weather Podcast. Last one was in mid-September and there’ve been at least a FEW interesting things since then: a 2012 dry spell wrapup; early October extreme fire danger despite freezing cold nights; and our very wet mid- to late October period. Even the early November warm spell deserves at least honorable mention status.
Good question Karl. We haven’t had time to do one. Between me working all 5 shows 4 days a week (no 1-2 hour block in there to do a podcast), and Brian reporting Monday, Tueday, and Friday, we haven’t been able to get together. Let’s just say we’re a very efficient operation here at FOX-12.
11/13/2012 Oregon (All) Temperature Summary
Warmest:
High:59 at CW5925 Coos Bay( 49 ft) & SWAIN(366 ft) & North Bend Munic(16 ft)
Low: 52 at BROOKINGS(79 ft)
Coldest:
High:27 at ANTELOPE(6460 ft)
Low: 22 at ANTELOPE (6460 ft )
Largest Diurnal Change: 25 degrees
PRINEVILLE 4NW (54/29 ) (2840 ft )
Lorella (52/27) (4160 ft)
Heaviest Rainfall:
0.64″ at BADGER CREEK(5710ft)
0.53″ at PARKER MOUNTAIN(5280ft)
Certainly looks more active than it has been lately but I am not sure we will see lasting accumulations at pass elevation. Wed into Thursday next week (obviously a big travel period) may be an issue but that may apply only to WA Cascade passes (not Snoqualmie). It will be borderline for US26 and US20. It is still more than a week away. It has been 10 years since the South Valley Surprise down here in Eugene…so we are overdue as well. Not as overdue however as a cold January. PDX has not had a January avg temp more than 2F below entire period of record average (not just last 30 years) since…1993.
Without looking at the data, wasn’t 2007 a chilly one? Now that I’ve made that statement I’m going to look.
A different way to look at it would be to use Gov Camp temps. 60 year mean temp for Jan is 29.90F. They were down to 26.18 in Jan 2008..otherwise you have to go back to….Jan 93 once again to find a month -2F below mean temp or colder. For perspective…Nov 1985 mean temp of 24.7F was colder than Jan 2008.
Hey you pipes out there…don’t care if you’re copper, ABS, PVC, galvanized…..you’ve had it way too easy over the last couple decades.
Same to you you douglas firs….you think 55mph is hard to stand up to…you think you got strong roots? How about 70mph? Good luck with that.
Don’t see any 31 years ago today type windstorm coming up……
South Valley Surprise. Yep, remember that distinctly.
I sure remember the “South Valley Surprise” on Feb 7, 2002. Since the town of Sweet Home is some what sheltered from big winds it sure was a surprise indeed. I remember about a dozen bigger fir trees blowing down behind my office right before our eyes. Thankfully the patch of trees was on the north side of the office, so nothing hit our office. There is another fir tree patch behind my house (north side again) and a couple of those big trees fell onto a neighbor house behind me. It sure made a mess around town.
This isn’t another one of those “just wait 10 days!” deals again, is it?
lol
Nice to see some hints of active wx on the horizon damp drizzly 48F is no way to live
The Tropopause fold of 2002.
It’s about time 🙂
Do you see any cold spells into early Dec?
Nope, no models show real cold weather in the next 2 weeks.
Boy, I’d sure like to get one day of skiing in before moving to Panama for a year (skiing’s pretty sucky down there).