A deepening marine layer this morning resulted in a period of very light drizzle, producing a trace (less than .01 inches) of precipitation at Seattle-Tacoma Airport.
As a result, we have lost the chance for a big record: the first July or any month without any precipitation at Seattle-Tacoma Airport, a location with data back to 1948.
The visible satellite imagery this morning at 9 AM shows marine clouds over western WA.
And the Seattle Space Needle Panocam shows a very moist, drippy lower atmosphere.
The hourly observations shows the precipitation event (L- indicates very light rain and T means trace). Drizzle started at 6:42 AM and ended 7:29 AM).
Since we had only a trace of rain, we still might beat the big record--the record number of days in a row without measurable rain (51 days).
Today, we are at day 40. The latest European Center model ensemble forecast prediction for 24-h precipitation suggests we are on the edge for beating the record, particularly with a potential light event on August 31st when the ensemble mean reaches .012 inches.
Keep your fingers crossed.
from Cliff Mass Weather and Climate Blog http://ift.tt/2v3pXGb
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