Rainy, rainy September!

September was a record-breaking rain month in the Northwest. From Steve Pierce of the Oregon chapter of the American Meteorological Society:

Historic September Rainfall

Portland, Oregon (September 29th 2013)  “Heavy September rains are soaking the Pacific Northwest today as the remnants of typhoon Pabuk dumps its moisture on the region. This is a very significant and in some cases historical rainfall event for the month of September. The Portland International Airport has surpassed its wettest September on record with more than 4.38″ as of 12 noon PT. The previous September record was 4.30″ set back in 1986. The period of record is 1940-Current at the airport. An even more amazing stat is coming out of Astoria, Oregon today. Astoria is closing in on nearly 10″ of rainfall for the month, which shatters the old record. Records at Astoria date back to 1890, or more than 123 years! More than 5″ of Astoria’s total for the entire month of September has fallen since just Friday. Daily rainfall records were also set on Saturday at Vancouver, WA. Hillsboro, McMinnville, Troutdale, Redmond and Salem, Oregon. Winds have gusted to near hurricane force along the Oregon coast this weekend and power has been out at many locations. Storm drains are clogged, causing localized flooding.”
What’s up next? “A third and very potent September storm will cross the area today and tonight, bringing with it more heavy rain, strong coastal winds and more localized flooding. Trees are susceptible to coming down with the combination of wind, saturated soils and still having their leaves attached which adds more drag to the tree itself.  A very special thanks to the Portland office of the National Weather Service for their great stats. Here is the list of the latest Record Event Reports for Oregon as of 12 noon PT” —
Phone: 503-504-2075
RECORD EVENT REPORT 
NATIONAL WEATHER SERVICE PORTLAND OREGON
1125 AM PDT SUN SEP 29 2013
...HISTORIC SEPTEMBER RAINFALL OCCURRING IN ASTORIA...
AS OF 11 AM THIS MORNING...OVER 5 INCHES OF RAIN HAVE FALLEN ON 
ASTORIA AIRPORT THIS WEEKEND. THIS RAINFALL HAS SHATTERED NUMEROUS 
SEPTEMBER RECORDS...REMARKABLE CONSIDERING THAT RECORDS HAVE BEEN 
KEPT IN ASTORIA SINCE 1890.
   RAINFALL RECORDS BROKEN IN ASTORIA
----------------------------------------
1. ALL-TIME WETTEST SEPTEMBER ON RECORD...
   1. SEP 2013......... 9.70 INCHES AND COUNTING.
   2. SEP 1906......... 8.66 INCHES.
   3. SEP 1920......... 8.55 INCHES.
   4. SEP 1905......... 7.38 INCHES.
2. WETTEST SEPTEMBER DAY ON RECORD...
   1. SEP 28 2013...... 3.56 INCHES.
   2. SEP 16 1997...... 2.67 INCHES.
   3. SEP 30 1953...... 2.41 INCHES.
   4. SEP 13 1935...... 2.27 INCHES.
3. WETTEST 2-DAY TOTAL FOR SEPTEMBER...TOP 2 NOW SET IN 2013.
   1. SEP 28-29 2013... 5.16 INCHES AND COUNTING.
   2. SEP 27-28 2013... 4.55 INCHES.
   3. SEP 3-4 1913..... 3.46 INCHES.
   4. SEP 16-17 1997... 3.42 INCHES.
4. WETTEST 3-DAY TOTAL FOR SEPTEMBER...
   1. SEP 27-29 2013... 6.15 INCHES AND COUNTING.
   2. SEP 2-4 1913..... 4.31 INCHES. 
   3. SEP 15-17 1997... 4.16 INCHES.

SXUS76 KPQR 291152
RERPQR
RECORD EVENT REPORT 
NATIONAL WEATHER SERVICE PORTLAND OREGON
0452 AM PDT SUN SEP 29 2013
...RECORD DAILY MAXIMUM RAINFALL SET AT NUMEROUS LOCATIONS ACROSS 
SOUTHWEST WASHINGTON AND NORTHWEST OREGON YESTERDAY...
AN EARLY FALL STORM BROUGHT ABUNDANT RAINFALL SATURDAY SEPTEMBER 
28...BREAKING SEVERAL PRECIPITATION RECORDS FOR THE FOLLOWING 
LOCATIONS:
LOCATION         NEW RAINFALL      PREVIOUS 
                 RECORD (INCHES)   RECORD (INCHES)  
---------------------------------------------------
ASTORIA OR          3.56         1.15 SET IN 1893
HILLSBORO OR        1.73         1.06 SET IN 1962
MCMINNVILLE OR      1.40         1.25 SET IN 1962
VANCOUVER WA        1.36         1.00 SET IN 1962
SALEM OR            1.33         0.94 SET IN 1962
PORTLAND AIRPORT    1.25         1.08 SET IN 2007
TROUTDALE OR        1.16         0.79 SET IN 1962

In Corvallis, the 7.06 total for the month was well above 
the previous record. The top ten Corvallis Septembers:

Corvallis (data to 1889):
YEAR    SEPT(in.)
2013    7.06
1920    5.40
1911    4.27
1941    3.96
1914    3.84
1969    3.62
1977    3.58
1986    3.56
1978    3.40
1997    3.39

Chris Daly of OSU's PRISM Climate Group produced a preliminary map 
of September precipitation nationwide:

best_ppt_us_us_30s_sum_mtd3
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