Climatological Report (Monthly)
Issued by NWS Medford, OR

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46
000
CXUS56 KMFR 011056 AAA
CLMMFR

CLIMATE REPORT
NATIONAL WEATHER SERVICE MEDFORD, OR
355 AM PDT MON JUN 1 2015

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

...THE MEDFORD OR CLIMATE SUMMARY FOR THE MONTH OF MAY 2015...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1911 TO 2015

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH             103   05/30/1986
 LOW               28   05/04/1996
                        05/06/1968
                        05/01/1954
HIGHEST            91   05/29                         96  05/14
LOWEST             38   05/07                         37  05/11
                        05/06
AVG. MAXIMUM     76.4              73.3     3.1     76.9
AVG. MINIMUM     49.2              46.2     3.0     49.0
MEAN             62.8              59.8     3.0     63.0
DAYS MAX >= 90      1               2.5    -1.5        4
DAYS MAX <= 32      0               0.0     0.0        0
DAYS MIN <= 32      0               0.2    -0.2        0
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         4.58   1945
TOTALS           0.33              1.31   -0.98     0.47
DAILY AVG.       0.01              0.04   -0.03     0.02
DAYS >= .01         9               8.4     0.6        7
DAYS >= .10         2               4.2    -2.2        2
DAYS >= .50         0               0.5    -0.5        0
DAYS >= 1.00        0               0.0     0.0        0
GREATEST
 24 HR. TOTAL    0.13   05/14 TO 05/15

SNOWFALL (INCHES)
RECORDS
 TOTAL            0.1   1988
TOTALS            0.0                 T     0.0      0.0
SINCE 7/1           T               4.1    -4.1      3.4

DEGREE_DAYS
HEATING TOTAL     107               198     -91      107
 SINCE 7/1       3236              4197    -961     4157
COOLING TOTAL      45                35      10       52
 SINCE 1/1         45                38       7       56

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

WIND (MPH)
AVERAGE WIND SPEED              4.5
HIGHEST WIND SPEED/DIRECTION    23/150    DATE  05/21
HIGHEST GUST SPEED/DIRECTION    27/150    DATE  05/21

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.40
NUMBER OF DAYS FAIR           15
NUMBER OF DAYS PC              9
NUMBER OF DAYS CLOUDY          6

AVERAGE RH (PERCENT)     55

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       2
LIGHT RAIN               10     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                       3     FOG W/VIS <= 1/4 MILE      0
HAZE                      0

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

&&

MAY 2015 CONTINUED THE TEMPERATURE SWINGS THAT NORMALLY ACCOMPANY SPRING AS
SEVERAL LOW PRESSURE SYSTEMS AND ACCOMPANYING COLD FRONTS PASSED THROUGH THE
PACIFIC NORTHWEST AND SOUTHERN OREGON AS PART OF A LARGER BLOCKING PATTERN
WHICH SET ITSELF UP OVER THE WESTERN HALF OF THE UNITED STATES. TEMPERATURES
STARTED WARMER THAN NORMAL BEFORE DROPPING BEHIND THE NEXT FRONTAL BOUNDARY.
THERE WERE DISTURBANCES OF NOTE THAT BROUGHT SIGNIFICANT PRECIPITATION IN THE
FORM OF SHOWERS AND THUNDERSTORMS TO MUCH OF SOUTHERN OREGON AND NORTHERN
CALIFORNIA. THE FIRST HAPPENED BETWEEN THE 11TH THROUGH THE 15TH AND THE SECOND
HAPPENED ON THE 17TH THROUGH THE 22. BOTH SYSTEMS BROUGHT ABOUT THE SAME AMOUNT
OF RAIN TO THE ROGUE VALLEY...APPROXIMATELY 0.15 INCHES PER STORM. IT IS WORTH
NOTING THAT THE VALLEYS RECEIVED MUCH LESS RAINFALL THAN AREAS OF HIGHER
ELEVATION...SUCH AS THE CASCADES AND SISKIYOUS WHICH SAW HIGHER THAN AVERAGE
PRECIPITATION VALUES. DESPITE THE MUCH NEEDED PRECIPITATION, MOST OF SOUTHERN
OREGON AND NORTHERN CALIFORNIA REMAIN IN MODERATE TO EXCEPTIONAL DROUGHT
CONDITIONS. AFTER THESE FRONTS PASSED THROUGH, AN AREA OF HIGH PRESSURE BUILT
IN OVER SOUTHERN OREGON AS THE OVERALL BLOCKING PATTERN WEAKENED. AS A RESULT,
TEMPERATURES WARMED DRAMATICALLY AND WE REACHED OUR FIRST 90 DEGREE DAY ON THE
29TH.

$$


USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.