WeatherWatcher: Weekly Weather July 2 - 8, back to the cool, the grey, and the occasionally wet

High temperatures have broken 80ºF for the first time since August 25, 2010! But we are back to the cool, the grey, and the occasionally wet.

I have made some changes to the weekly data, mostly the order it is displayed, but also I removed the average weekly atmospheric pressure and put in what I call the difference in pressure over the week. “Barometer shift” for short. It will show how much the barometer has shifted over the entire week.

Also I have correctly specified the unit of measurement used for the barometer or air pressure. My weather station only defined it as inches. The unit of measure actually used is inches of mercury (inHg), which is the standard barometric measurement used throughout the United States and Canada. The inches of mercury is defined as the pressure exerted by a column of mercury of 1 inch in height at 32.0ºF at the standard acceleration of gravity.

The extremes:

High temperature: 83.4ºF (Saturday)

Low temperature: 46.8ºF (Monday)

High humidity: 100%

Low humidity: 15% (Tuesday)

Barometer high: 29.737 inHg (Tuesday)

Barometer low: 29.382 inHg (Saturday)

Total rainfall: No measureable precipitation.

Barometer shift: 0.355 inHg

Averages:

Warmest day: 65.5ºF (Wednesday)

Coldest day: 56.2ºF (Thursday)

Average temperature: 60.7ºF

Average humidity: 68%

Highlights:

• Monday we broke the 80ºF for daily high temperature for the first time since August 25, 2010.
• Tuesday and Wednesday topped out just barely under 80ºF however if rounded to the nearest whole degree, both days would qualify as a high of 80ºF. Tuesday was 79.6ºF and Wednesday was 79.9ºF.
• Friday had a high humidity of 97%, rare, however we’ve had a few days this year that have been under the 100% mark already.
• No measurable precipitation this week, first dry week since the new year.

The weather for the week ahead:

We will continue our strong influence of the marine air flows off the Pacific Ocean. This will result in mostly cloudy mornings, cool afternoons, some or most may break away to partly sunny skies, others may bring some drizzles, morning fog, and possibly rain showers or sprinkles. A lot of this is a result of the lingering effects of La Nina, like a train the atmosphere has a lot of momentum and it takes a while for weather patterns to change. I’m still keeping my fingers crossed that we’ll start to have summer weather (not spring weather) before the month of July is over.

June in review and a brief look at the ENSO (El Nino Southern Oscillation) status and outlook coming soon!

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. All weather data unless otherwise noted is sourced from Carl’s Shoreline Weather Station.