Weather Blog

By the numbers: Wednesday's record rainfall

After the first three weeks of July began generally sunny and warm-to-hot, things changed in a hurry on July 23rd as a potent storm rolled through Western Washington, bringing a record amount of rainfall to the Puget Sound region.

Here are some of the statistics from the storm:

0.76": The amount of rain that fell at Seattle's Sea-Tac Airport on Wednesday. That broke the daily record rainfall for July 23 of 0.54", set in 1949. Technically the storm total was 0.77" -- 0.01" fell just before the day began. Some places went over an inch, including Everett.

0.70": The average monthly rainfall for July. Only took one day to reach it!

4: The place on the all-time wettest July day chart Wednesday now sits. 0.85" was the record set in 1981. There was 0.81" in 1995 and 0.80" in 1997.

23: The number of consecutive dry days we had before it rained -- that streak actually ended on Tuesday, it was the 0.01" mentioned above that fell just before midnight PST.  That's not an unusually long streak and is nowhere near even the Top 10 driest stretches (51 is the record.)

61: The number of consecutive days in July we had gone dry before Tuesday. Before then, the last July rain was on July 22, 2012. We went all of July 2013 dry.

14: The number of times it's now rained on July 23 in the past 122 years. We're now into the statistical driest time of the year (why SeaFair is held around this time) and most dates the last week of July and first week of August have only had rain about 9-13 times since 1892. July 30 and Aug. 4 tie for the driest day of the year at 9 instances with rain.

683 : The number of cloud-to-ground lightning strikes reported between Lewis County and the Canadian Border between midnight and 11 a.m.

0.01": The amount of rain that fell in Port Angeles Wednesday. With southerly flow in place through the day, the northern Olympic Peninsula had a big rain shadow that kept the area mainly dry despite the drenchings just to the west and east of there.

24.38": How much rain Seattle has received since February. It was already the wettest Feb.-July on record even without any July rainfall, but now that we have some, we've already set the wettest February-August period on record as well.