Public Information Statement
Issued by NWS Medford, OR

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NOUS46 KMFR 020529 CCA
PNSMFR

PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE MEDFORD OR
350 AM PDT MON JUN 1 2015

...MEDFORD OREGON WEATHER REVIEW: MAY 2015...

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 22ND. 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 FIST
90 DEGREE DAY ON THE 29TH.

THE AVERAGE TEMPERATURE FOR MAY WAS 62.8 DEGREES, WHICH IS 3.0
DEGREES ABOVE NORMAL. THE AVERAGE MAXIMUM TEMPERATURE WAS 76.4
DEGREES, WHICH IS 3.1 DEGREES ABOVE NORMAL. THE AVERAGE MINIMUM
TEMPERATURE WAS 49.2 DEGREES, WHICH IS 3.0 DEGREES ABOVE NORMAL. THE
HIGHEST TEMPERATURE FOR THE MONTH WAS 91 DEGREES ON THE 29TH. THE
LOWEST TEMPERATURE OF THE MONTH WAS 38 DEGREES ON THE 6TH AND 7TH.

THERE WERE 15 CLEAR DAYS, 10 PARTLY CLOUDY DAYS, AND 6 CLOUDY DAYS.

TOTAL PRECIPITATION WAS 0.33 INCHES WHICH IS 0.98 INCHES BELOW
NORMAL. THE GREATEST 24 HOUR TOTAL WAS 0.13 INCHES THAT FELL FROM
THE 14TH TO THE 15TH. THE WATER YEAR PRECIPITATION BEGAN OCTOBER 1ST
AND IS CURRENTLY 13.68 INCHES WHICH IS 2.80 INCHES BELOW NORMAL.
CALENDAR YEAR PRECIPITATION IS 6.83 INCHES WHICH IS 2.01 INCHES
BELOW NORMAL.

THE AVERAGE WIND FOR THE MONTH WAS 4.5 MPH. THE FASTEST RECORDED TWO-
MINUTE WIND WAS 23 MPH FROM THE SOUTHEAST ON THE 21ST. THE PEAK
WIND WAS 27 MPH FROM THE SOUTHEAST ALSO ON THE 21ST.

THE HIGHEST PRESSURE FOR THE MONTH WAS 30.16 INCHES ON THE 23RD. THE
LOWEST PRESSURE FOR THE MONTH WAS 29.64 INCHES ON THE 31ST.



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