WeatherWatcher: Weekly weather data, and rain rain rain

• This weekend rain arrives
• National Weather Service Issues a Special Weather Statement
• Last week's weather data 

Fall is starting: The high pressure block along the Pacific West Coast is eroding away rapidly now as a series of several potent Pacific storms has plowed into it. As a result the jet stream is now shifting into position to be aimed at the northwest tip of Washington State, setting the stage for our typical classic fall weather pattern. The first storm front sliding in from the Northwest will come in tomorrow during the day, we should start to see some light rain in the afternoon and evening hours.  Light rain will likely taper off to showers by Saturday afternoon. Saturday night - Monday evening is when the bigger storm arrives. This one is going to bring breezy to windy conditions and possibly 1-2 inches of rain. The exact path of the storm still has a lot of uncertainty at this time, depending on how it tracks could mean a possible wind event.

Also given the season there will be a lot of fall leaves making their way to the ground during the weekend, some of this debris can clog storm drains causing unsafe road conditions. If you notice a storm drain clogged in your neighborhood you should clear it of debris only if you can do so safely.

Special Weather Statement from NWS: The National Weather Service in Seattle has issued a special weather statement regarding this weekends expected rain. Our unusually long dry spell is about to come to an abrupt end on Friday October 12, 2012. Rain will combine with the oil that has built up during the long dry spell and create slick road surfaces. Additionally minor urban and small stream flooding is possible, especially if wind blown leaves are allowed to clog drains and cause standing water in low-lying road ways. 

Last week's weather data, September 29th - October 5th:

High temperature: 69.6°F (Monday)

Low temperature: 41.5°F (Friday)

No measurable rainfall

Warmest day: 57.9°F (Monday)

Coldest day: 50.8°F (Wednesday)

Average temperature: 53.6°F (0.5°F below average)

3-year average temperature this week: 54.1°F

Warmest and coldest days are based on average temperature of the entire day, starting at midnight. All other averages are based on the whole week, starting Saturday morning at midnight. All weather data unless otherwise noted is sourced from Carl's Shoreline Weather Station.

Twitter: @SWeatherWatcher