Home Page
Seattle Public Utilities Home page

Search Climate Change

August 2022

Harvey and Seattle

Posted: August 30th, 2017

Every time extreme rainfall and flooding affect a major American city, people ask about Seattle’s preparedness. “What if we received 50 inches of rainfall?” Over the next few weeks, I’ll use this (admittedly neglected) space to explore just how extreme rainfall could get in Seattle and how it relates to what’s happened in Texas.   […]

Read more »

Storm Summary: An Odd 24 Hours

Posted: January 18th, 2017

  That was one of the most intense 24-hour storm events Seattle has seen in a while. Post-frontal showers are still racing through the region, but they’re not likely to significantly add to storm totals.   Each of SPU’s 22 reporting rain gages recorded over two inches in 24 hours. Five gages recorded at least […]

Read more »

More Wind, Waves and Tides

Posted: December 20th, 2016

  A large wind storm that landed well to our north provided strong southwesterly winds this morning. It also provided another, albeit non-King Tide, chance to monitor tides and coastal flooding.   Wind readings from around the Sound more or less came in at 20mph sustained with gusts to about 30mph, notably weaker than recent […]

Read more »

Wind, Waves and Tides

Posted: December 19th, 2016

  Last Monday’s weather forecast was not that exciting: a few snowflakes; otherwise cold and dry. More noteworthy was the fact that another round of King Tides was imminent. Predicted water levels Wednesday through Sunday were over 12-and-half feet (relative to mean lower-low water).   The good news was that the same high pressure that […]

Read more »

Warmest November

Posted: December 7th, 2016

    A stat largely lost in the shuffle toward early December snow is that SeaTac’s average temperature last month was 50.87 degrees. That’s its warmest November since records began there in 1949 (Downtown Seattle averaged 51.9 degrees in November 1899).   9 out of SeaTac’s 12 warmest all-time months have occurred this decade. 8 […]

Read more »

Weekly Rainfall Review

Posted: November 14th, 2016

  Last Monday’s forecast summary: • Light rain ending this morning. • Near-record high temps are expected to peak in the mid-60s tomorrow. • Steady rain is likely again on Friday. • Extended forecasts have 4-5 systems, none appearing strong, arriving over the next 2 weeks.   The 7-day precipitation forecast called for 1- to […]

Read more »

Weekly Rainfall Review

Posted: November 6th, 2016

  Last Monday’s (Halloween) forecast summary: • A few showers with wind today and tomorrow. • Somewhat steadier rain is likely late Wednesday into Thursday. • More substantial rain is possible by the weekend. • Extended forecasts suggest continued wet conditions.   The 7-day precipitation forecast called for 2.5- to 4.0-inches across the Tolt and […]

Read more »

Record October Review

Posted: November 3rd, 2016

October 2016 was the wettest October ever recorded in Seattle. 10.05 inches fell at Sea-Tac, which is 1.09 inches more than the previous record (2003) and 6.57 inches more than normal. Coincidentally, 6.57 inches is normal rainfall for November, so two months of rain fell in one.   It was only the tenth time that […]

Read more »

The New New Normal

Posted: August 1st, 2016

    Back on the fifth of July, the temperature in Seattle only reached a high of 67 degrees. Seven degrees cooler than normal, it was the coolest day in weeks. (It would end up being the coldest day of the month.) Headlines and hashtags cried “Jul-tober” as if it somehow resembled October’s 53-degree average. […]

Read more »

The Wettest Wet Season

Posted: March 31st, 2016

  Over the course of a “normal” year, 37.49 inches of rain falls in Seattle (Sea-Tac). Since the first of this January, we’ve received 18.49 inches. That’s an impressive 150 percent of where we’re supposed to be on this date, the final day of March.   But if you go back to the start of […]

Read more »