Sunday, November 20, 2011

Possible Big Storm and Flooding!

Over the past several years all the flooding events have gone just to the north of us. But today models have given us huge amounts of rain here in the metro area.
Here is the Fox 12 RPM model.
   Nearly 7 inches in Portland!
Here is also the 12z GFS-WRF
It shows over 5 inches of rain!
So today's models are showing big time rain, but it all depends on where this front stalls out since this is a narrow band of heavy rain. But if today models are right the we could have some serious flooding issues and possibly dangerous flooding near small rivers.
This system could also bring some strong winds with it as well.
This image is the 12z GFS-WRF showing wind gusts on Tuesday morning.
Wind gusts are peaking at 40 knots (46mph) in the valley and over 70 knots (80mph) at the coast.
For skiers/snowboarders:
Timberline forecast:

Monday: Snow. High near 28. Wind chill values as low as zero. Windy, with a west southwest wind between 30 and 34 mph, with gusts as high as 46 mph. Chance of precipitation is 100%. New snow accumulation of 5 to 9 inches possible. 

Monday Night: Snow. Low around 25. Breezy, with a southwest wind between 21 and 23 mph, with gusts as high as 29 mph. Chance of precipitation is 90%. New snow accumulation of 8 to 12 inches possible. 

Tuesday: Snow before 4pm, then rain and snow. High near 34. Windy, with a southwest wind between 31 and 40 mph. Chance of precipitation is 90%. New snow accumulation of 7 to 11 inches possible. 

Tuesday Night: Rain and snow. Low around 25. Windy, with a southwest wind between 37 and 44 mph, with gusts as high as 55 mph. Chance of precipitation is 80%. New snow accumulation of 10 to 16 inches possible. 

Wednesday: Snow. The snow could be heavy at times. High near 34. Breezy. Chance of precipitation is 90%. New snow accumulation of 7 to 11 inches possible. 

Wednesday Night: Snow likely. Cloudy, with a low around 23. Chance of precipitation is 60%. New snow accumulation of 1 to 2 inches possible. 


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