Climatological Report (Monthly)
Issued by NWS Portland, ME

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000 CXUS51 KGYX 011844 CLMPWM CLIMATE REPORT NATIONAL WEATHER SERVICE GRAY ME 1048 AM EDT FRI MAY 1 2015 ................................... ...THE PORTLAND ME CLIMATE SUMMARY FOR THE MONTH OF APRIL 2015... CLIMATE NORMAL PERIOD 1981 TO 2010 CLIMATE RECORD PERIOD 1941 TO 2015 /FOR TEMPERATURES/ CLIMATE RECORD PERIOD 1871 TO 2015 /FOR PRECIPITATION/ CLIMATE RECORD PERIOD 1882 TO 2015 /FOR SNOWFALL/ WEATHER OBSERVED NORMAL DEPART LAST YEAR`S VALUE DATE(S) VALUE FROM VALUE DATE(S) NORMAL ................................................................ TEMPERATURE (F) RECORD HIGH 92 04/28/2009 LOW 8 04/04/1954 HIGHEST 70 04/14 75 -5 69 04/11 LOWEST 23 04/05 24 -1 22 04/17 04/02 AVG. MAXIMUM 54.9 53.3 1.6 52.5 AVG. MINIMUM 34.4 34.7 -0.3 34.1 MEAN 44.7 44.0 0.7 43.3 DAYS MAX >= 90 0 0.0 0.0 0 DAYS MAX <= 32 0 0.2 -0.2 0 DAYS MIN <= 32 12 10.4 1.6 13 DAYS MIN <= 0 0 0.0 0.0 0 PRECIPITATION (INCHES) RECORD MAXIMUM 9.90 1973 MINIMUM 0.28 1999 TOTALS 5.03 4.32 0.71 2.72 DAILY AVG. 0.17 0.14 0.03 0.09 DAYS >= .01 10 11.2 -1.2 12 DAYS >= .10 7 7.0 0.0 10 DAYS >= .50 2 2.9 -0.9 1 DAYS >= 1.00 2 1.0 1.0 0 GREATEST 24 HR. TOTAL 3.69 04/20 TO 04/21 SNOWFALL (INCHES) RECORDS TOTAL 20.5 1906 TOTALS 2.9 2.8 0.1 1.2 SINCE 7/1 94.5 61.9 32.6 SNOWDEPTH AVG. 1 DAYS >= TRACE 3 1.0 2.0 DAYS >= 1.0 2 0.6 1.4 GREATEST SNOW DEPTH 7 04/02 04/01 24 HR TOTAL 2.9 04/08 TO 04/09 DEGREE_DAYS HEATING TOTAL 602 630 -28 642 SINCE 7/1 6726 6648 78 7051 COOLING TOTAL 0 0 0 0 SINCE 1/1 0 0 0 0 ................................................................. WIND (MPH) AVERAGE WIND SPEED 8.9 HIGHEST WIND SPEED/DIRECTION 30/330 DATE 04/04 HIGHEST GUST SPEED/DIRECTION 42/300 DATE 04/04 SKY COVER AVERAGE SKY COVER 0.60 AVERAGE RH (PERCENT) 61 WEATHER CONDITIONS. NUMBER OF DAYS WITH THUNDERSTORM 0 HEAVY RAIN 2 RAIN 4 LIGHT RAIN 14 FREEZING RAIN 0 LT FREEZING RAIN 0 HEAVY SNOW 0 SNOW 2 LIGHT SNOW 2 FOG 8 FOG W/VIS <= 1/4 MILE 1 HAZE 3 - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. && AFTER THE COLD WINTER, APRIL FINALLY REVERSED THE TREND OF VERY COLD WEATHER. IT WAS THE FIRST MONTH TO FINISH ABOVE NORMAL SINCE DECEMBER 2014. THE COOL WEATHER CONTINUED FOR THE FIRST WEEK AND A HALF OF APRIL WITH THE 7 INCHES OF WINTER SNOW PACK STILL ON THE GROUND STILL SLOWLY MELTING. WINTER`S LAST GASP WAS ON APRIL 8 AND 9 WHEN 2.9 INCHES OF SNOW FELL IN PORTLAND. THIS WAS THE MOST SNOW SINCE MID FEBRUARY. SPRING FINALLY ARRIVED ON APRIL 11. ONLY TWO DAYS IN 2015 HAD SURPASSED 50 DEGREES UP UNTIL THAT POINT. BUT ON APRIL 11 THE TEMPERATURE ROSE TO 54 DEGREES AND DIDN`T LOOK BACK. FIVE OF THE NEXT 6 DAYS SAW TEMPERATURES IN THE 60S INCLUDING THE HIGHEST TEMPERATURE OF THE MONTH ON APRIL 14 AT 70 DEGREES. THE LAST OF THE WINTER SNOW PACK FINALLY MELTED BY APRIL 13. A STORM SYSTEM BROUGHT HEAVY RAIN ON APRIL 20 AND 21, THE FIRST SIGNIFICANT RAIN STORM SINCE EARLY DECEMBER. THE WARM WEATHER PATTERN SHIFTED TO A COOLER ONE TOWARD THE END OF THE MONTH WITH TEMPERATURES FLUCTUATING A FEW DEGREES ON EITHER SIDE OF NORMAL FOR THE FINAL WEEK OF APRIL. THE AVERAGE TEMPERATURE WAS 44.7 DEGREES WHICH WAS 0.7 DEGREES ABOVE NORMAL. THIS WAS THE FIRST ABOVE NORMAL MONTH IN PORTLAND SINCE DECEMBER AND THE WARMEST APRIL SINCE 2012. THE WARMEST APRIL ON RECORD WAS 2010 WHEN THE AVERAGE TEMPERATURE WAS 48.8 DEGREES. THE COLDEST WAS 1943 AT 38.4 DEGREES. THERE WERE 10 DAYS THIS MONTH WHEN THE TEMPERATURE ROSE TO 60 DEGREES OR WARMER. NORMALLY THERE ARE ABOUT 7 DAYS EACH APRIL THAT REACH 60 DEGREES. THE 10 DAYS THIS MONTH TIED FOR THE 6TH MOST ON RECORD. THE FOLLOWING TABLE LISTS THE MOST DAYS WITH A HIGH TEMPERATURE OF 60 DEGREES OR MORE IN APRIL. DAYS WITH MAX 60 OR HIGHER (SINCE 1940) RANK DAYS YEAR 1 18 2010 2 13 1981 3 12 1991 12 1968 5 11 1986 6 10 2015 <=== 10 1998 10 1974 10 1954 10 1949 10 1945 10 1941 A TOTAL OF 5.03 INCHES OF PRECIPITATION FELL WHICH WAS 0.71 INCHES ABOVE NORMAL. THIS WAS THE WETTEST MONTH IN PORTLAND SINCE DECEMBER AND THE WETTEST APRIL SINCE 2011. THE HEAVIEST PRECIPITATION FELL ON APRIL 20 AND 21 WHEN 3.69 INCHES OF RAIN FELL MOSTLY DURING THE OVERNIGHT PERIOD. THE WETTEST APRIL ON RECORD WAS 1973 WHEN 9.90 INCHES WAS RECORDED. THE DRIEST WAS 1999 WITH ONLY 0.28 INCHES. 2.9 INCHES OF SNOW FELL WHICH WAS ONLY 0.1 INCHES ABOVE NORMAL. ALL OF THE MEASURABLE SNOW FELL ON APRIL 8 AND 9. THIS WAS THE SNOWIEST APRIL SINCE 2011. THE SNOWIEST APRIL ON RECORD WAS 1906 WHEN 20.5 INCHES FELL. THERE HAVE BEEN 10 APRILS IN THE 134 YEARS OF SNOW RECORDS AT PORTLAND WHICH DID NOT SEE ANY SNOW DURING THE MONTH. THE MOST RECENT WAS IN 2009. THE FOLLOWING DAILY RECORDS WERE SET OR TIED IN APRIL 2015... DATE RECORD PREVIOUS 3 52 - WARMEST AVERAGE TEMPERATURE 50 IN 2010 AND 2002 20 2.20 - GREATEST PRECIPITATION 0.95 IN 1978 $$ KIMBLE

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