Climatological Report (Monthly)
Issued by NWS Medford, OR

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CXUS56 KMFR 011219
CLMMFR

CLIMATE REPORT
NATIONAL WEATHER SERVICE MEDFORD, OR
520 AM PDT TUE MAY 1 2018

...................................

...THE MEDFORD OR CLIMATE SUMMARY FOR THE MONTH OF APRIL 2018...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1911 TO 2018

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              96   04/28/1998
                        04/28/1957
                        04/28/1926
 LOW               21   04/01/1936
HIGHEST            89   04/25                         76  04/21
LOWEST             30   04/03                         31  04/09
AVG. MAXIMUM     64.8              64.9    -0.1     63.3
AVG. MINIMUM     41.5              40.8     0.7     41.1
MEAN             53.2              52.8     0.4     52.2
DAYS MAX >= 90      0               0.1    -0.1        0
DAYS MAX <= 32      0               0.0     0.0        0
DAYS MIN <= 32      1               1.7    -0.7        1
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         4.40   1912
TOTALS           1.07              1.38   -0.31     0.95
DAILY AVG.       0.04              0.05   -0.01     0.03
DAYS >= .01        14              10.6     3.4       14
DAYS >= .10         6               4.8     1.2        2
DAYS >= .50         0               0.4    -0.4        0
DAYS >= 1.00        0               0.0     0.0        0
GREATEST
 24 HR. TOTAL    0.31   04/05 TO 04/05

SNOWFALL (INCHES)
RECORDS
 TOTAL            4.2   1953
TOTALS            0.0               0.0     0.0      0.0
SINCE 7/1         4.2               4.1     0.1     11.8

DEGREE_DAYS
HEATING TOTAL     356               367     -11      374
 SINCE 7/1       4003              3999       4     3888
COOLING TOTAL       8                 3       5        0
 SINCE 1/1          8                 3       5        0

FREEZE DATES
RECORD
 EARLIEST     09/13/1921
 LATEST       06/12/1952
EARLIEST                        10/18
LATEST                          04/29
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              4.6
HIGHEST WIND SPEED/DIRECTION    30/140    DATE  04/07
HIGHEST GUST SPEED/DIRECTION    37/140    DATE  04/07

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.50
NUMBER OF DAYS FAIR           10
NUMBER OF DAYS PC             12
NUMBER OF DAYS CLOUDY          8

AVERAGE RH (PERCENT)     61

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                1     RAIN                       2
LIGHT RAIN               17     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      10     FOG W/VIS <= 1/4 MILE      0
HAZE                     13

-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.

$$

THE MONTH OF APRIL HAD SOME INTERESTING CLIMATE FEATURES OVER OUR
REGION.  WE STARTED OFF THE MONTH SLIGHTLY COOLER THAN AVERAGE WITH
COOL ONSHORE FLOW DOMINATING THE WEATHER PATTERN.  THE NEXT BIGGEST
STORY WAS THE LATE SEASON ATMOSPHERIC RIVER EVENT AROUND APRIL 5TH
TO ABOUT APRIL 7 TH.  THIS LOW WAS VERY ANOMALOUS FOR THIS TIME OF
YEAR WITH SOME OF OUR SITUATIONAL AWARENESS DISPLAYS SHOWING RECORD
MINIMUM SEAL LEVEL PRESSURE FOR EARLY APRIL.  OVERALL,  THE BULK OF
THE MOISTURE WAS A BIT FARTHER SOUTH THAN FORECASTED,  BUT IT WAS
STILL A VERY WINDY EVENT WITH WIND GUSTS NEAR 60 MPH ALONG PORTIONS
OF THE COAST.

A COOLER THAN NORMAL PATTERN THAN CONTINUED FOR THE MIDDLE OF THE
MONTH. THE AVERAGE TEMPERATURE FOR THE CALENDAR DAY ROUGHLY 3 TO 7
DEGREES BELOW AVERAGE.  PERSISTENT STORMY WEATHER WAS RESPONSIBLE
FOR THIS. WE SAW LOWER THAN AVERAGE SNOW LEVELS AND MT. ASHLAND WAS
ABLE TO STAY OPEN UNTIL APRIL 22ND.

THEN WE FINALLY WARMED UP TO ABOVE AVERAGE TEMPERATURES.  AN
ANOMALOUSLY STRONG RIDGE SET UP OVER THE AREA WITH NEAR RECORD
ANOMALIES FOR LATE APRIL. WE ACTUALLY BROKE A FEW RECORDS FOR SOME
CLIMATE SITES BETWEEN THE 24TH AND THE 26TH.

IF YOU ANALYZED THE MONTH OF APRIL STATISTICALLY, IT WOULD APPEAR TO
BE RATHER AVERAGE WITH RESPECT TO TEMPERATURES ACCORDING TO
MEDFORD`S STATISTICS.  AS FOR PRECIPITATION, IT WAS DRIER THAN
NORMAL.

$$

CZS



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