Climatological Report (Seasonal)
Issued by NWS Portland, ME
Issued by NWS Portland, ME
000 CXUS51 KGYX 072343 CLSCON PWMCLMCON 000 TTAA00 KGYX 041800 CLIMATE REPORT NATIONAL WEATHER SERVICE GRAY ME 643 PM EST SAT DEC 7 2019 ................................... ...THE CONCORD NH CLIMATE SUMMARY FOR THE FALL SEASON, FROM 9/1/2019 TO 11/30/2019... CLIMATE NORMAL PERIOD 1981 TO 2010 CLIMATE RECORD PERIOD 1868 TO 2019 WEATHER OBSERVED NORMAL DEPART LAST YEAR`S VALUE DATE(S) VALUE FROM VALUE DATE(S) NORMAL ................................................................ TEMPERATURE (F) RECORD HIGH 98 09/02/1953 LOW -17 11/30/1875 HIGHEST 86 09/23 88 -2 94 09/03 09/22 LOWEST 7 11/17 11 -4 5 11/23 AVG. MAXIMUM 59.3 60.5 -1.2 57.3 AVG. MINIMUM 36.6 37.1 -0.5 39.0 MEAN 48.0 48.8 -0.8 48.2 DAYS MAX >= 90 0 0.6 -0.6 3 DAYS MAX <= 32 4 1.3 2.7 4 DAYS MIN <= 32 33 35.0 -2.0 35 DAYS MIN <= 0 0 0.0 0.0 0 PRECIPITATION (INCHES) RECORD MAXIMUM 22.08 2005 MINIMUM 2.88 1908 TOTALS 9.81 11.14 -1.33 16.77 DAILY AVG. 0.11 0.12 -0.01 0.19 DAYS >= .01 36 30.6 5.4 38 DAYS >= .10 23 19.2 3.8 31 DAYS >= .50 3 7.4 -4.4 14 DAYS >= 1.00 3 2.8 0.2 6 GREATEST 24 HR. TOTAL 1.89 10/17 SNOWFALL (INCHES) RECORDS TOTAL 25.7 2011 TOTALS 0.3 2.6 -2.3 13.3 SINCE 7/1 0.3 2.6 -2.3 13.3 SNOWDEPTH AVG. 0 DAYS >= TRACE 6 1.9 4.1 7 DAYS >= 1.0 0 1.0 -1.0 5 GREATEST SNOW DEPTH T 24 HR TOTAL 0.3 11/12 DEGREE_DAYS HEATING TOTAL 1556 1512 44 1594 SINCE 7/1 1576 1560 16 1624 COOLING TOTAL 28 39 -11 116 SINCE 1/1 492 452 40 734 ................................................................. WIND (MPH) AVERAGE WIND SPEED 5.4 HIGHEST WIND SPEED/DIRECTION 35/060 DATE 10/17 HIGHEST GUST SPEED/DIRECTION 49/050 DATE 10/17 SKY COVER AVERAGE SKY COVER 0.40 AVERAGE RH (PERCENT) 72 - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. && THE FALL BEGAN WITH A SERIES OF COOL, DRY AIR MASSES MOVING OUT OF CANADA. THIS BROUGHT MANY COOL DAYS AND EVEN COOLER NIGHTS. THE COLDEST TEMPERATURE OF THIS STRETCH WAS 33 DEGREES ON SEPTEMBER 19. BUT JUST AS THE COOL WEATHER REACHED ITS MINIMUM, WARM, SUMMER-LIKE WEATHER MADE A COME BACK. HOT WEATHER BUILDING OVER THE SOUTHEAST US SPILLED INTO NEW ENGLAND AND CONCORD TOPPED 80 DEGREES FOR THE NEXT 4 STRAIGHT DAYS. AFTER THIS LATE SEASON WARM UP, THE TREND OF COOL, DRY, CANADIAN AIR MASSES RETURNED FOR THE NEXT FEW WEEKS. THE COLDEST TEMPERATURE OF THIS STRETCH WAS 27 DEGREES ON OCTOBER 5 AN 6, THE FIRST FREEZE OF THE SEASON. SOON THE WEATHER PATTERN BEGAN TO CHANGE AGAIN. A TROUGH OF LOW PRESSURE DEVELOPED OVER THE CENTER OF THE COUNTRY, WITH NEW ENGLAND ON THE EASTERN SIDE OF THIS TROUGH. THIS ALLOWED WARM AND VERY MOIST AIR TO MOVE INTO THE AREA ALONG WITH SEVERAL LOW PRESSURE SYSTEMS DELIVERING MORE FREQUENT RAINFALL. THE MOISTURE AND FREQUENT CLOUDS HAD THE EFFECT OF BRINGING MANY COOL DAYS AND WARM NIGHTS. A FEW MORE INTENSE STORM SYSTEMS BROUGHT SIGNIFICANT WEATHER TO THE AREA BEGINNING IN LATE OCTOBER. THE FIRST WAS ON OCTOBER 16 AND 17 WHEN MORE THAN 2 INCHES OF RAIN FELL AND WINDS GUSTED TO 49 MPH LEADING TO SCATTERED WIND DAMAGE. AT LEAST THREE MORE STORMS FOLLOWED IN THE NEXT TWO WEEKS, WITH THE LAST ARRIVING ON HALLOWEEN, OCTOBER 31. WINDS BEHIND THIS STORM ON NOVEMBER 1 GUSTED TO 45 MPH JUST AS CONCORD SAW ITS LAST 70 DEGREE TEMPERATURE OF THE SEASON. SOON COLDER AIR WOULD ARRIVE. THE MORE INTENSE COLD ARRIVED ON NOVEMBER 7 AND LASTED FOR NEARLY TWO WEEKS. MOST DAYS WERE 10 TO 15 DEGREES BELOW NORMAL. THE FIRST ACCUMULATING SNOW OF THE SEASON FELL ON NOVEMBER 12 WITH THE TEMPERATURE NOT WARMING ABOVE FREEZING AGAIN FOR THE NEXT TWO DAYS. THE COLDEST TEMPERATURE WAS ON NOVEMBER 17 WHEN THE TEMPERATURE REACHED 7 DEGREES. GRADUALLY THE TEMPERATURE DRIFTED BACK TOWARD NORMAL WITH THE LAST FEW STORM SYSTEMS IN NOVEMBER BRINGING MOSTLY RAIN. THE AVERAGE TEMPERATURE FOR THE FALL WAS 48.0 DEGREES WHICH WAS 0.8 DEGREES BELOW NORMAL AND THE COOLEST FALL SINCE 1997. THE COOLEST FALL WAS IN 1972 WHEN THE AVERAGE TEMPERATURE WAS 43.7 DEGREES. THE WARMEST WAS 53.5 DEGREES IN 2017. A TOTAL OF 9.81 INCHES OF PRECIPITATION FELL WHICH WAS 1.33 INCHES BELOW NORMAL. THE HEAVIEST PRECIPITATION FELL ON OCTOBER 16 AND 17 WHEN 2.29 INCHES OF RAIN WAS MEASURED. THE DRIEST FALL WAS IN 1908 WHEN ONLY 2.88 INCHES WAS RECORDED. THE WETTEST WAS IN 2005 WITH 22.08 INCHES. THERE WAS 0.3 INCHES OF SNOWFALL WHICH WAS 2.3 INCHES BELOW NORMAL. ALL OF THIS SNOW FELL ON NOVEMBER 12. SNOWFALL IN THE FALL IS VARIABLE AND ALMOST ALWAYS FALLS IN THE LAST PART OF NOVEMBER AS THE SNOW SEASON IS JUST BEGINNING. THE SNOWIEST FALL WAS IN 2011 WHEN 25.7 INCHES WAS MEASURED. THERE HAVE BEEN 3 FALLS WITH NO SNOWFALL, MOST RECENTLY IN 2015. AN ADDITIONAL 29 YEARS HAD ONLY A TRACE OF SNOWFALL IN THE FALL, MOST RECENTLY IN 2010. THE FOLLOWING DAILY RECORDS WERE SET OR TIED IN FALL 2019... DATE RECORD PREVIOUS OCT 27 1.19 - GREATEST PRECIPITATION 1.17 IN 1943 OCT 31 55 - WARMEST LOW TEMPERATURE 52 IN 1881 NOV 13 25 - COOLEST HIGH TEMPERATURE 30 IN 1894 $$ KIMBLE