WeatherWatcher: First seasonal rain, then return to late Summer

• The week ahead - First seasonal rain
• Dry spell
• ENSO status
• Weather station malfunction
• Last two weeks weather data

We have our first Autumn rainfall on the way, look for increasing showers developing this evening, most of the rain will fall after midnight and into the Monday morning commute. Winds will also be on the increase starting tonight and into the morning hours. Monday afternoon a convergence zone may develop but currently it is looking like it will stay north of Shoreline and Lake Forest Park. Tuesday high pressure rebuilds over the region bringing back sunny skies with the temperatures peaking out in the low to mid 70's for the remainder of the work week.

• Be careful during the morning commute as roads will be extra slick due to the long period of time we've had without measurable precipitation.

We have had no measurable precipitation for 47 days, if we make it until midnight tonight without any rainfall, it will be 48 days without rain.

The current ENSO (El Niño Southern Pacific Oscillation) status is ENSO-neutral.  There are some signs, primarily some slight warming of the eastern equatorial Pacific surface heat content.  Although minor, it has some forecast models pointing towards a possible minor to moderate El Niño. As a result, the NOAA Climate Prediction center has issued an El Niño watch for the October through January period. I will be writing more about this during the middle of this week.

August 31st - September 2nd the weather station had a malfunction and didn't log data during this time. For these 3 days I have sourced temperature and humidity data from the Shoreline Central Market weather station.

August 25th - 31st:

High temperature: 80.5°F (Monday August 27th)

Low temperature: 48.5°F (Friday August 31st)

Total rainfall: 0.00 inches

Warmest day: 63.6°F (Monday August 27th)

Coldest day: 58.2°F (Friday August 31st)

Average temperature: 60.9°F

September 1st - 7th:

High temperature: 87.0°F (Friday September 7th)

Low temperature: 49.1°F (Sunday September 2nd)

Total rainfall: 0.00 inches

Warmest day: 69.0°F (Friday September 7th)

Coldest day: 57.9°F (Saturday and Sunday September 1st and 2nd)

Average temperature: 61.3°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