Climatological Report (Annual)
Issued by NWS Portland, OR

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000
CXUS56 KPQR 012245
CLAEUG

ANNUAL CLIMATE REPORT
NATIONAL WEATHER SERVICE PORTLAND OR
245 PM PST WED JAN 1 2014

...EUGENE 2013 WEATHER IN REVIEW...

================================================================
MONTHLY WEATHER RECAPS...

JANUARY...2012 ENDED ON A RATHER WET NOTE...BUT 2013 WAS MUCH
    DRIER. IN FACT...JANUARY 2013 WAS THE 3RD DRIEST ON RECORD
    WITH ONLY 1.35 INCHES OF RAIN...ABOUT ONE FOURTH OF WHAT
    SHOULD OCCUR IN JANUARY. IF IT WAS NOT RAINING IT WAS LIKELY
    FOGGY. WITH TEMPERATURES AT OR JUST BELOW FREEZING AT NIGHT
    FREEZING FOG CREATED ICY ROADWAYS BETWEEN THE 10TH AND 24TH.

FEBRUARY...PLENTY OF CLOUDS...BUT RAINFALL WAS AGAIN BELOW
    NORMAL. BUT TEMPERATURES REMAINED NEAR NORMAL. THE CLOUDS
    KEPT TEMPERATURES COOLER THAN USUAL DURING THE DAY...BUT
    A TAD WARMER AT NIGHT.

MARCH...RATHER BENIGN MONTH OF WEATHER. HIGH PRESSURE OVER THE
    REGION WEAKENED FRONTS AS THEY PUSHED INTO THE REGION. AS A
    RESULT...FRONTS BROUGHT LESS RAINFALL. STRONGEST FRONT ON
    THE 20TH PRODUCED STRONG SOUTH WINDS WITH GUSTS NEAR 40 MPH.
    THE CONTINUED BELOW NORMAL RAINFALL FROM JANUARY TO MARCH
    MADE 2013 THE DRIEST START OF A YEAR ON RECORD.

APRIL...MILD MONTH WITH A BIT MORE IN WAY OF RAIN...BUT STILL
    RAINFALL WAS BELOW NORMAL. A STRONG FRONT ROLLED ACROSS THE
    REGION ON THE 6TH AND 7TH...WITH WINDS GUSTING 40 TO 50 MPH
    IN THE SOUTH WILLAMETTE VALLEY...BUT WINDS GUSTED OVER 65
    MPH IN THE COAST RANGE. DRY AND SUNNY WEATHER RETURNED TO
    CLOSE THE MONTH...WITH TEMPERATURES WELL INTO THE 70S FROM
    THE 24TH TO 27TH.

MAY...STARTED RATHER MILD...WITH HIGHS REACHING INTO THE MIDDLE
    80S BY THE 5TH. BUT IT WAS ALSO DRY...WITH NO RAIN FOR THE
    FIRST 13 DAYS OF MAY. AFTER THE 14TH...MORE SEASONABLE
    WEATHER RETURNED. RAINFALL WAS CLOSER TO NORMAL...BUT MAY
    MARKED THE 5TH STRAIGHT MONTH OF BELOW NORMAL RAINFALL.

JUNE...LIKE MAY...JUNE WAS MILD BUT REMAINED ON THE DRY SIDE.
    OVERALL...RATHER BENIGN WEATHER MONTH. SHOWERS ACROSS THE
    REGION BETWEEN THE 12TH AND 14TH BROUGHT SOME EXCITEMENT.
    FUNNEL CLOUDS WERE REPORTED AROUND HARRISBURG AND JUST SOUTH
    OF CORVALLIS ON THE 13TH. AFTERWARDS...BENIGN WEATHER
    CONTINUED. WITH FEWER CLOUDY DAYS...TEMPERATURES WERE WARMER
    WITH THE INCREASED SUNSHINE. A SIGNIFICANT WARM UP CLOSED THE
    MONTH WITH TEMPERATURES CLIMBING INTO THE MIDDLE 90S.

JULY...HIGH PRESSURE OVER THE NORTHEAST PACIFIC GREW STRONGER IN
    JULY. THIS MAINTAINED A DRY AIR MASS OVER THE REGION. WHILE A
    FEW AFTERNOON THUNDERSTORMS DID DEVELOP OVER THE CASCADES...
    NONE APPROACHED EUGENE/SPRINGFIELD AREA. NOT A DROP OF RAIN
    FELL AT THE EUGENE AIRPORT IN JULY...MAKING IT THIRD JULY WITH
    NARY A DROP OF RAIN SINCE THE EARLY 1930S. THE OTHER TWO
    YEARS WERE 2003 AND 1967. WITH MANY SUNNY DAYS...TEMPERATURES
    WERE INTO THE 80S NEARLY EVERY DAY...WITH A STRETCH OF 6 DAYS
    IN THE 90S (JULY 21-26). JULY 2013 HAD 28 DAYS WHERE THE HIGH
    TEMPERATURE WAS AT LEAST 80 DEG...TYING THE RECORD SUCH
    STRING WITH 28 SET IN 1985...1970 AND 1967.

AUGUST...AUGUST CONTINUED WHERE JULY ENDED...DRIER THAN NORMAL.
    UPPER LOW PRESSURE OFF THE SOUTH OREGON COAST BECAME THE
    DOMINANT WEATHER PATTERN. THIS PATTERN MAINTAINED A WARM
    AND HUMID SOUTHERLY FLOW OVER THE REGION THROUGH MUCH OF
    THE MONTH. AFTERNOON/EVENING THUNDERSTORMS OVER THE CASCADES
    TEASED EUGENE WITH RAIN. THIS CHANGED ON THE 20TH AND 21ST
    WHEN THUNDERSTORMS DRIFTED INTO THE SOUTH WILLAMETTE VALLEY.
    WHILE NOT A LOT OF RAIN OCCURRED AT EUGENE...THE SKIES WERE
    FILLED WITH A SPECTACULAR LIGHTNING DISPLAY. IT REMAINED
    WARM AND DRY. NORMAL OVERNIGHT AUGUST LOWS ARE IN THE LOWER
    50S...BUT WITH THE WARM MUGGY AIR...TEMPERATURES HAD A
    DIFFICULT TIME DROPPING LOWER THAN THE UPPER 50S AND LOWER 60S
    DURING THE LAST WEEK OF AUGUST. THIS CREATED MUGGY AND RATHER
    UNCOMFORTABLE SLEEPING CONDITIONS FOR MANY PEOPLE. THE DAILY
    LOWS IN AUGUST 2013 AVERAGED 54.8 DEG...MAKING THE DAILY LOWS
    OF AUGUST 2013 AS THE 2ND WARMEST SINCE 1890.

SEPTEMBER...STARTED DRY AND WARM...WITH HIGHS WELL INTO THE 80S.
    THUNDERSTORMS OVER THE CASCADES AGAIN MOVED ACROSS THE SOUTH
    WILLAMETTE VALLEY ON THE 4TH AND 5TH. THIS TIME...THEY HAD A
    LOT OF RAIN. EUGENE AIRPORT RECEIVED 0.66 INCH OF RAIN ON
    THE 5TH. BUT NOT TOO FAR AWAY AT MOHAWK...A THUNDERSTORM
    DROPPED 1.69 INCHES OF RAIN IN UNDER 1 HOUR. AFTER THE 7TH
    THE DRY MILD WEATHER CONTINUED. BUT THE CLASSIC SWITCH TO
    FALL STARTED AFTER THE 20TH. A SERIES OF STRONG FRONTS
    BROUGHT ROUNDS OF HEAVY RAIN...WITH THE HEAVIEST OCCURRING
    ON THE 28TH THROUGH THE 30TH. DURING THAT TIME...2 TO 4
    INCHES OF RAIN FELL IN/AROUND EUGENE. AFTER 8 MONTHS OF
    BELOW NORMAL RAINFALL...EUGENE HAD IT FIRST MONTH WITH A
    SURPLUS. THE 7.08 INCHES OF RAIN MADE SEPTEMBER 2013 AS
    THE WETTEST ON RECORD SINCE 1890.

OCTOBER...AFTER A WET START...HIGH PRESSURE OVER THE REGION
    RESUMED THE DRY AND MILD WEATHER. NO RAIN OCCURRED BETWEEN THE
    9TH AND 26TH. WITH THE MOIST GROUND...THE LIGHT WINDS AND
    CLEAR SKIES BROUGHT BY THE HIGH PRESSURE RESULTED IN
    FREQUENT FOG AND LOW CLOUDS BETWEEN LATE NIGHT AND MORNING
    HOURS...WITH HEAVY FOG REPORTED EACH DAY FROM THE 16TH TO
    THE 25TH. TREND OF BELOW NORMAL RAINFALL RESUMED IN OCTOBER.

NOVEMBER...RATHER BENIGN MONTH...AS TEMPERATURES AVERAGE NEAR
    NORMAL. STRONG COLD FRONT PUSHED ACROSS THE REGION ON THE
    7TH...WITH WEST TO NORTHWEST WINDS GUSTING 30 TO 40 MPH AS
    THE FRONT PASSED. HOWEVER...NOT MUCH RAIN IN NOVEMBER...
    AS ONCE AGAIN THE STORM TRACK WAS SHUNTED TOO FAR NORTH...
    IN PART DUE TO PERSISTENT HIGH PRESSURE OVER THE WESTERN
    UNITED STATES. AFTER THE 25TH...FOG WAS COMMON AT NIGHT
    INTO THE MORNING HOURS. WITH TEMPERATURES JUST BELOW 32 DEG
    MANY AREAS IN THE SOUTH WILLAMETTE VALLEY EXPERIENCED ICY
    AND/OR FROSTY ROADWAYS.

DECEMBER...STARTED MILD AT FIRST...BUT VERY COLD ARCTIC AIR
    PUSHED INTO THE PACIFIC NORTHWEST ON THE 3RD AND 4TH...
    BRINGING THE COLDEST AIR SINCE 1972. ON THE 6TH...SNOW
    FELL ACROSS THE REGION...WITH 7 TO 12 INCHES REPORTED ACROSS
    MUCH OF THE SOUTH WILLAMETTE VALLEY. ON THE 7TH...SKIES
    CLEARED AND THE TEMPERATURES STEADILY DROPPED FROM THE 20S
    DURING THE DAY INTO THE SINGLE DIGITS IN THE EVENING. COLD
    AIR OVER THE SURROUNDING HIGHER TERRAIN DRAINED THROUGH THE
    RIVER VALLEYS AND SETTLED IN THE SOUTH WILLAMETTE VALLEY. TO
    MAKE IT WORSE...SNOW COVERED GROUND AND CLEAR SKIES COMBINED
    TO MAKE TEMPERATURES DROP FURTHER. BY LATE EVENING ON THE
    7TH...THE TEMPERATURE WAS DOWN TO 7 DEG BELOW ZERO. HOURS LATER
    ON THE 8TH...IT WOULD BE 10 DEG BELOW ZERO. THIS WOULD MAKE
    FOR THE 2ND COLDEST NIGHT SINCE 1890. IRONICALLY THE RECORD
    COLDEST FOR EUGENE WAS 12 BELOW ZERO...AND WAS SET ON THE
    SAME DAY BACK IN 1972. DECEMBER 2013 TIED 1985 FOR THE COLDEST
    AVERAGE DAILY LOW TEMPERATURES. OVERALL...THE AVERAGE DAILY
    MEAN TEMPERATURE OF 33.5 DEG MADE DECEMBER THE 3RD COLDEST
    ON RECORD.

    WARMER WEATHER RETURNED BY THE 12TH WITH SEASONABLE WEATHER.
    BUT IT REMAINED ON THE DRY SIDE AS PERSISTENT HIGH PRESSURE
    REMAINED OVER THE WESTERN UNITED STATES. THIS HIGH PRESSURE
    BROUGHT LIGHT WINDS AND SET UP STRONG INVERSIONS...WHICH
    PREVENTED GOOD MIXING OF THE AIR IN THE VALLEY. THIS LED TO
    PERSISTENT FOG AND LOW CLOUDS AND STAGNANT AIR.

    2013 FINISHED AS THE DRIEST YEAR ON RECORD WITH 21.19 INCHES.
    THIS BREAKS THE OLD RECORD OF 23.26 INCHES SET IN 1944.

=================================================================
NEW RECORDS SET IN 2013 (PREVIOUS RECORD IN PARENTHESES)
    PERIOD OF RECORD FOR EUGENE: 1890-2013

JAN...
    MONTH   3RD DRIEST JANUARY.
FEB...
        NO NEW RECORDS IN FEBUARY.
MAR...
        NO NEW RECORDS IN MARCH.
APR...
     5TH    TIED DAILY WARM LOW   51 DEG    (51/1962)
MAY...
     4TH    TIED DAILY HIGH       83 DEG    (83/1992)
     5TH    TIED DAILY HIGH       86 DEG    (86/1953)
    12TH    NEW DAILY WARM LOW    56 DEG    (55/1987)
JUN...
    23RD    TIED DAILY WARM LOW   58 DEG    (58/1990)
    30TH    TIED DAILY HIGH       96 DEG    (96/1951)
JUL...
     1ST    TIED DAILY WARM LOW   63 DEG    (63/1942)
    28TH    TIED DAILY LOW        43 DEG    (44/1959)
    MONTH   TIED RECORD FOR MOST DAYS OF 80 DEG OR WARMER.
            28 DAYS IN 2013 AND 1985..1970 AND 1967.
    MONTH   4TH WARMEST FOR AVERAGE DAILY HIGHS
    MONTH  11TH JULY WITH NOT A DROP OF RAIN.
                 OTHER YEARS: 2003..1967..1933..1931..1926..
                 1922..1921..1914..1910 AND 1906.
AUG...
     9TH    TIED DAILY WARM LOW    62 DEG   (62/2003)
    MONTH   2ND WARMEST FOR AVERAGE DAILY LOWS
SEP...
     2ND    NEW DAILY WARM LOW    62 DEG    (60/1995)
    11TH    NEW DAILY WARM LOW    59 DEG    (58/2004)
    29TH    NEW DAILY RAINFALL  1.90 IN.    (1.01/1901)
    MONTH   WETTTEST SEPTEMBER  7.08 IN.    (5.21/1927)
OCT...
            NO NEW RECORDS IN OCTOBER.
NOV...
    22ND    NEW DAILY LOW         19 DEG    (25/1980)
DEC...
     4TH    NEW DAILY LOW         18 DEG    (20/1972)
     5TH    NEW DAILY LOW         14 DEG    (20/1992)
     5TH    NEW DAILY COOL HIGH   31 DEG    (33/1904)
     6TH    NEW DAILY SNOWFALL   7.0 INCHES  (4.0/1956)
     7TH    NEW DAILY LOW         -7 DEG    (-6/1972)
     MONTH  3RD COLDEST FOR AVERAGE DAILY HIGHS
     MONTH  TIES WITH 1985 FOR COLDEST AVERAGE DAILY LOWS
     MONTH  OVERALL MEAN TEMP...WAS 3RD COLDEST DECEMBER.

YEAR    2013 ALSO RECORDED THE LEAST NUMBER OF DAYS WITH
        1.00 INCH OR MORE OF RAIN. ONLY 1 SUCH DAY IN 2013.
        PREVIOUS RECORD WAS 2 DAYS...SET IN 2008 AND 1944.

YEAR    2013 WAS DRIEST YEAR ON RECORD WITH 21.19 INCHES.
        THE PREVIOUS RECORD WAS 23.26 INCHES BACK IN 1944.

============================================================
2013 EUGENE TEMPERATURE DATA

      |--- AVERAGES ----| MEAN T DEPART| EXTREME TEMPS/DATE  |
MONTH |HIGHS LOWS   MEAN|  FROM NORMAL | HIGHEST      LOWEST |
=============================================================
JAN     42.2  31.2   36.7   -4.0 DEG     56/ 7TH      20/12TH
FEB     50.4  36.1   43.3   +0.4 DEG     57/28TH      27/26TH
MAR     58.0  37.4   47.7   +1.0 DEG     72/31ST*     28/ 7TH
APR     62.6  40.3   51.5   +1.3 DEG     78/27TH*     31/30TH
MAY     70.0  44.4   57.2   +1.9 DEG     86/ 5TH      34/ 1ST
JUN     77.7  49.6   63.3   +2.9 DEG     96/30TH      40/ 1ST
JUL     87.2  51.4   69.3   +2.5 DEG     96/24TH*     43/28TH
AUG     83.5  54.8   69.2   +2.3 DEG     95/ 6TH      46/ 3RD
SEP     73.6  53.5   63.6   +1.7 DEG     90/10TH      41/27TH
OCT     61.7  39.0   50.4   -2.3 DEG     78/ 6TH      28/29TH
NOV     51.9  36.6   44.2   -0.7 DEG     64/ 6TH      19/22ND
DEC     40.6  26.3   33.5   -6.2 DEG     56/22ND*    -10/ 8TH

2013    63.3  41.7   52.5    0.0 DEG     96/JUL 24*  -10/DEC 8
NORMAL  63.4  41.6   52.5                 *LAST OF MULTIPLE

DAYS WITH TEMPERATURES IN 2013 WHERE...
       |------ MAXIMUM TEMP --------||------ MINIMUM TEMP ---|
       <=32  60+  70+  80+  90+ 100+  <=20  <=32   60+   70+
==============================================================
JAN      4    0    0    0    0    0      1    19    0     0
FEB      0    0    0    0    0    0      0     9    0     0
MAR      0   13    2    0    0    0      0    10    0     0
APR      0   21    5    0    0    0      0     1    0     0
MAY      0   28   16    6    0    0      0     0    0     0
JUN      0   30   23   11    3    0      0     0    0     0
JUL      0   31   31   28   11    0      0     0    2     0
AUG      0   31   29   22    4    0      0     0    7     0
SEP      0   28   18   10    1    0      0     0    1     0
OCT      0   19    1    0    0    0      0     2    0     0
NOV      0    1    0    0    0    0      1    11    0     0
DEC      7    0    0    0    0    0      8    18    0     0

2013    11  202  125   77   19    0     10    70   10     0
NORMAL   2  195  123   58   14    1      3    51    2     0

FIRST/LAST OCCURRENCES OF...        IN 2013     NORMAL
  LAST 32 DEG OR COLDER IN SPRING    APR 30     APR 20
  FIRST 70+ DEG OF THE YEAR          MAR 30     MAR 30
  FIRST 80+ DEG OF THE YEAR          MAY  4     MAY 15
  FIRST 90+ DEG OF THE YEAR          JUN 28     JUN 25

  LAST 90+ DEG OF THE YEAR           SEP 10     SEP 11
  LAST 80+ DEG OF THE YEAR           SEP 19     SEP 29
  LAST 70+ DEG OF THE YEAR           OCT  6     OCT 21
  FIRST 32 DEG OR COLDER IN FALL     OCT 29     OCT 20
==============================================================

2013 EUGENE RAINFALL DATA...
DAYS WITH TEMPERATURES WHERE ...
       TOTAL  DEPARTURE  DAYS WITH AT LEAST...  GREATEST IN
MONTH   RAIN  FM NORMAL   0.01 0.10 0.50 1.00   24HRS & DATE
===============================================================
JAN     1.35    -5.52      11    7    0    0    0.39 JAN 24-25
FEB     1.61    -3.82      14    5    0    0    0.45 FEB 5-6
MAR     2.13    -2.86      12    4    1    0    0.81 MAR 19-20
APR     1.45    -1.88      10    5    0    0    0.53 APR 5-6
MAY     2.03    -0.71      13    7    1    0    0.60 MAY 21-22
JUN     1.10    -0.40       7    2    1    0    0.73 JUN 25-26
JUL     0.00    -0.54       0    0    0    0    NO RAIN IN JULY
AUG     0.25    -0.36       4    1    0    0    0.15 AUG 25
SEP     7.08    +5.79      15   13    6    1    2.31 SEP 29-30
OCT     0.58    -2.67       6    1    0    0    0.33 OCT 2
NOV     2.13    -5.59      14    5    0    0    0.69 NOV 18-19
DEC     1.48    -6.35       8    3    2    0    0.64 DEC 1-2

  2013  21.19  -24.91     114   53   11    1    2.31 SEP 29-30
NORMAL  46.10             144   93   30   10

EUGENE WATER YEAR 2012-13 (1 OCT 2012 THROUGH 30 SEP 2013)
       36.34 INCHES       9.76  INCHES BELOW NORMAL

============================================================

2013 WIND AND PRESSURE DATA...
      AVERAGE SPEED (MPH)    STRONGEST WIND GUST (MPH)
MONTH   2013  NORMAL    DIRECTION   SPEED   DATE
============================================================
JAN      4.2    7.1    WEST             29 MPH  JAN  9
FEB      5.7    7.2    WEST             32 MPH  FEB  6
MAR      5.0    7.5    WEST             36 MPH  MAR 20
APR      6.1    7.2    SOUTHWEST        44 MPH  APR  7
MAY      7.0    6.7    SOUTHWEST        35 MPH  MAY  5
JUN      5.6    7.0    SOUTHWEST        32 MPH  JUN 18
JUL      7.5    7.5    NORTH            30 MPH  JUL 26
AUG      5.7    7.2    NORTH            31 MPH  AUG 20
SEP      7.1    6.8    SOUTHWEST        37 MPH  SEP 28
OCT      3.9    6.4    SOUTHWEST        26 MPH  OCT  1
NOV      5.3    7.1    NORTHWEST        30 MPH  NOV  7
DEC      4.7    7.2    NORTH            20 MPH  DEC 18

2013     5.8    7.1    SOUTHWEST        44 MPH  APR  7

HIGHEST PRESSURE IN 2013...30.66 INCHES     JAN 16
LOWEST PRESSURE IN 2013...29.53 INCHES     SEP 29

============================================================
EUGENE CLIMATE PERIOD OF RECORDS...       1890 TO 2013
EUGENE CLIMATE NORMALS BASED ON...        1981 TO 2010
============================================================

DATA COMPILED BY ROCKEY
NATIONAL WEATHER SERVICE PORTLAND OREGON

ONLINE AT:     WEATHER.GOV/PORTLAND


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