Looks like June!

June 6, 2011

The weather maps sure look like June…this is what I mean:

1.  No significant period of rain in the next 7+ days.  Possibly a sprinkle tomorrow or Wednesday morning, and maybe a sprinkle this weekend.  But there are no cold fronts or juicy wet weather systems in sight.

2. Some warm days and some cooler days in the 7 Day forecast.  The warmest temp I have on there is 76 for Thursday, the coolest tomorrow around 63.  The average high this time of year is 71 or 72, so this range is very normal.

3.  Mix of sun and clouds, but plenty of onshore flow tomorrow and Friday through Sunday.  I’d say maybe 60-70% of the daylight hours the next 7 days will be cloudy or mostly cloudy.

Speaking of tomorrow’s forecast, I just made some quick changes.  It’s been bugging me all afternoon/evening that our RPM model keeps showing  mostly sunny skies after about 11am tomorrow.  That seemed totally counter-intuitive to a strong marine push in progress and a chilly airmass overhead tomorrow (down to 1-2 degrees at 850mb. by afternoon).  Then it finally dawned on me.  Often when a cold trough comes overhead, it totally disrupts the marine layer and lessens the stability.  Almost like it’s releasing the low level moisture to mix out up above (not really correct, but hopefully you get the idea).  So I quickly changed all the westside forecasts to match what you see up above.  It’ll be interesting to see how it turns out.

The other change was in the 7 Day Forecast.  More troughiness Friday-Sunday means more cloud cover and cooler temps.

Chief Meteorologist Mark Nelsen