Climatological Report (Seasonal)
Issued by NWS Portland, ME
Issued by NWS Portland, ME
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
000 CXUS51 KGYX 110258 CCA CLSPWM PWMCLSPWM 000 TTAA00 GYX 082134 CLIMATE REPORT NATIONAL WEATHER SERVICE GRAY ME 434 PM EST THU DEC 08 2022 ................................... ...THE PORTLAND ME CLIMATE SUMMARY FOR THE FALL SEASON, FROM 9/1/2022 TO 11/30/2022... CLIMATE NORMAL PERIOD: 1991 TO 2020 CLIMATE RECORD PERIOD: 1941 TO 2022 (FOR TEMPERATURES) CLIMATE RECORD PERIOD: 1871 TO 2022 (FOR PRECIPITATION) CLIMATE RECORD PERIOD: 1882 TO 2022 (FOR SNOWFALL) WEATHER OBSERVED NORMAL DEPART LAST YEAR`S VALUE DATE(S) VALUE FROM VALUE DATE(S) NORMAL ................................................................ TEMPERATURE (F) RECORD HIGH 95 09/11/1983 09/07/1945 LOW 3 11/24/1989 HIGHEST 81 09/10 86 -5 79 09/12 09/11 LOWEST 18 11/21 16 2 18 11/30 AVG. MAXIMUM 60.9 59.7 1.2 60.9 AVG. MINIMUM 42.1 41.6 0.5 43.7 MEAN 51.5 50.6 0.9 52.3 DAYS MAX >= 90 0 0.5 -0.5 0 DAYS MAX <= 32 0 1.1 -1.1 0 DAYS MIN <= 32 21 24.8 -3.8 19 DAYS MIN <= 0 0 0.0 0.0 0 PRECIPITATION (INCHES) RECORD MAXIMUM 24.18 2005 MINIMUM 4.88 1915 TOTALS 17.27 13.27 4.00 14.91 DAILY AVG. 0.19 0.15 0.04 0.16 DAYS >= .01 30 30.9 -0.9 36 DAYS >= .10 18 18.9 -0.9 25 DAYS >= .50 13 8.1 4.9 8 DAYS >= 1.00 7 3.6 3.4 6 GREATEST 24 HR. TOTAL 3.24 10/13 TO 10/14 SNOWFALL (INCHES) RECORDS TOTAL 24.3 1921 TOTALS T 2.5 -2.5 0.1 SINCE 7/1 T 2.5 -2.5 0.1 SNOWDEPTH AVG. T DAYS >= TRACE 3 1.6 1.4 3 DAYS >= 1.0 0 0.8 -0.8 0 GREATEST SNOW DEPTH 0 24 HR TOTAL T 11/20 11/16 11/15 DEGREE DAYS HEATING TOTAL 1235 1353 -118 1162 SINCE 7/1 1236 1377 -141 1193 COOLING TOTAL 28 45 -17 31 SINCE 1/1 542 446 96 521 ................................................................ WIND (MPH) AVERAGE WIND SPEED 6.6 HIGHEST WIND SPEED/DIRECTION 32/160 DATE 10/14 HIGHEST GUST SPEED/DIRECTION 47/150 DATE 11/30 SKY COVER AVERAGE SKY COVER 0.44 AVERAGE RH (PERCENT) 73 WEATHER CONDITIONS. NUMBER OF DAYS WITH THUNDERSTORM 4 HEAVY RAIN 12 RAIN 16 LIGHT RAIN 32 FREEZING RAIN 0 LT FREEZING RAIN 0 HEAVY SNOW 0 SNOW 0 LIGHT SNOW 3 FOG 39 FOG W/VIS <= 1/4 MILE 8 HAZE 2 - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. && THE FALL SEASON STARTED OFF ON THE COOL AND DAMP SIDE IN THE PORTLAND AREA. A COLD FRONT CROSSED THROUGH NEW ENGLAND EARLY IN SEPTEMBER, WHICH WAS FOLLOWED BY AN AREA OF HIGH PRESSURE. THIS WAS FOLLOWED BY ANOTHER COLD FRONT, WHICH STALLED OVER NEW ENGLAND THROUGH THE FIRST WEEK OF THE MONTH WITH NUMEROUS WAVES OF LOW PRESSURE TRACKING ALONG IT. THIS WAS THEN FOLLOWED BY A DRIER STRETCH OF WEATHER FOR THE SECOND WEEK OF THE MONTH BEFORE ANOTHER STALLED FRONTAL BOUNDARY BROUGHT A WIDESPREAD SOAKING RAINFALL EVENT ON THE 18TH AND 19TH. ANOTHER FEATURE OF INTEREST DURING SEPTEMBER WAS TROPICAL STORM FIONA PASSING WELL OFFSHORE ON THE 23RD AND 24TH BRINGING HIGH SURF CONDITIONS TO AREA BEACHES. A RELATIVELY ACTIVE PATTERN CONTINUED INTO OCTOBER WITH A RIDGE OVER THE WEST COAST AND A DOWNSTREAM TROUGH OVER THE GREAT LAKES AND ANOTHER RIDGE NEAR NEWFOUNDLAND. THIS PATTERN ALLOWED MULTIPLE LOW PRESSURE SYSTEMS TO TRACK FROM THE OHIO VALLEY ACROSS NEW ENGLAND BRINGING BOUTS OF MODERATE TO HEAVY RAIN AND SEVERAL TEMPERATURE SWINGS. THE MIDDLE OF OCTOBER WAS PARTICULARLY ACTIVE WITH ONE STORM SYSTEM BRINGING 3.27 INCHES OF RAIN THE NIGHT OF THE 13TH THROUGH THE 14TH AND ANOTHER SYSTEM BRINGING 2.76 INCHES OF RAIN ON THE 17TH INTO THE 18TH. THE STORM SYSTEM THAT CROSSED THE MORNING OF THE 14TH ALSO BROUGHT STRONG SOUTH TO SOUTHEAST WINDS THAT CAUSED TREE DAMAGE IN YORK COUNTY WITH THE PEAK WIND MEASURED AT PORTLAND REACHING 45 MPH. THE FIRST FREEZE OF THE FALL SEASON OCCURRED ON OCTOBER 9TH WHEN THE LOW TEMPERATURE REACHED 32 DEGREES AND WAS 6 DAYS EARLIER THAN THE NORMAL FIRST FREEZE OF OCTOBER 15TH. THE RELATIVELY ACTIVE PATTERN TRANSITIONED TO A MILD AND DRY PATTERN TO CLOSE OUT THE MONTH OF OCTOBER. MOSTLY DRY CONDITIONS CONTINUED THROUGH EARLY NOVEMBER ALONG WITH EXCEPTIONAL WARMTH THROUGH THE FIRST WEEK AND A HALF. DURING THE FIRST 12 DAYS THE AVERAGE TEMPERATURE WAS 54.1 DEGREES AND WAS THE WARMEST 12 DAY STRETCH DURING NOVEMBER ON RECORD BEATING THE PREVIOUS WARMEST 12 DAYS BY 3.9 DEGREES. ALSO DURING THIS STRETCH THE HIGH TEMPERATURE EXCEEDED THE 70 DEGREE MARK THREE TIMES AND A NEW ALL TIME RECORD HIGH FOR THE MONTH OF NOVEMBER OCCURRED ON THE 5TH WHEN THE HIGH TEMPERATURE REACHED 75 DEGREES. THE JET STREAM CONFIGURATION ACROSS NORTH AMERICA DURING THIS WARM STRETCH CONSISTED OF A DEEP TROUGH ALONG THE WEST COAST AND AN ANOMALOUS RIDGE OF HIGH PRESSURE CENTERED OVER NEW ENGLAND. THE RIDGE OF HIGH PRESSURE OVER NEW ENGLAND BROKE DOWN DURING THE MIDDLE OF NOVEMBER LEADING TO TEMPERATURES TRENDING BELOW NORMAL THROUGH THE END OF FALL WITH A COUPLE OF FRONTAL SYSTEMS CROSSING THE AREA. A STRONG COLD FRONT CROSSED THE AREA NOVEMBER ON 30TH BRINGING HEAVY RAINFALL AND STRONG SOUTHEAST WINDS TOPPING OUT AT 47 MPH. THE AVERAGE TEMPERATURE FOR THE FALL SEASON WAS 51.5 DEGREES, WHICH WAS 0.9 DEGREES ABOVE NORMAL AND TIES WITH 2005 AND 1961 FOR THE 7TH WARMEST FALL ON RECORD. THE WARMEST FALL ON RECORD WAS IN 2017 AND 2011 WHEN THE AVERAGE TEMPERATURE WAS 53.0 DEGREES. THE COOLEST WAS 45.6 DEGREES IN 1976. THE FOLLOWING TABLE LISTS THE WARMEST FALL SEASONS ON RECORD AT PORTLAND. WARMEST AVERAGE TEMPERATURE IN FALL (SINCE 1941)... RANK TEMP YEAR 1 53.0 2017 53.0 2011 3 52.3 2021 52.3 2015 5 51.9 2016 6 51.7 2020 7 51.5 2022 51.5 2005 51.5 1961 10 51.3 1990 51.3 1970 THE FIRST FREEZE OF THIS FALL OCCURRED ON OCTOBER 9TH WHEN THE LOW TEMPERATURE REACHED 32 DEGREES. THIS WAS 6 DAYS EARLIER THAN THE NORMAL FIRST FREEZE, WHICH OCCURS ON OCTOBER 15TH. A TOTAL OF 17.27 INCHES OF PRECIPITATION FELL, WHICH WAS 4.00 INCHES ABOVE NORMAL. THE HEAVIEST PRECIPITATION FELL ON OCTOBER 13TH INTO THE 14TH WHEN 3.24 INCHES WERE MEASURED IN 24 HOURS AND A STORM TOTAL OF 3.27 INCHES. THE WETTEST FALL ON RECORD WAS IN 2005 WHEN 24.18 INCHES OF PRECIPITATION FELL. THE DRIEST WAS 4.88 INCHES IN 1915. ONLY A TRACE OF SNOWFALL WAS RECORDED DURING THE FALL, WHICH WAS 2.5 INCHES BELOW NORMAL. SNOW IN FALL CAN BE HIT OR MISS. IN 142 YEARS OF RECORDS THERE HAVE BEEN 4 YEARS WITH NO SNOW IN FALL, MOST RECENTLY IN 2006. IN ADDITION TO THIS YEAR THERE HAVE BEEN 30 YEARS WITH ONLY A TRACE OF SNOW IN FALL. THE SNOWIEST FALL WAS 24.3 INCHES IN 1921. THE FOLLOWING DAILY RECORDS WERE SET OR TIED IN FALL 2022... DATE RECORD PREVIOUS OCT 14 2.79 - GREATEST PRECIPITATION 1.89 IN 1882 OCT 18 1.49 - GREATEST PRECIPITATION 1.46 IN 1981 OCT 25 4 - SMALLEST TEMPERATURE RANGE 4 IN 2021, 1972(TIED) OCT 26 57 - WARMEST LOW TEMPERATURE 52 IN 1991 NOV 5 55 - WARMEST LOW TEMPERATURE 55 IN 1961 (TIED) NOV 5 75* - WARMEST HIGH TEMPERATURE 71 IN 1944 NOV 5 65 - WARMEST AVERAGE TEMPERATURE 60 IN 1994 NOV 6 59** - WARMEST LOW TEMPERATURE 53 IN 1985 NOV 6 64 - WARMEST AVERAGE TEMPERATURE 61 IN 2020 NOV 11 69 - WARMEST HIGH TEMPERATURE 69 IN 2020 (TIED) NOV 11 61 - WARMEST AVERAGE TEMPERATURE 61 IN 2020 (TIED) NOV 12 52 - WARMEST LOW TEMPERATURE 51 IN 1984 NOV 12 73 - WARMEST HIGH TEMPERATURE 65 IN 2020 AND 1982 NOV 12 63 - WARMEST AVERAGE TEMPERATURE 56 IN 1984 AND 1982 *THE RECORD HIGH OF 75 DEGREES ON THE 5TH WAS ALSO A NEW ALL TIME RECORD HIGH TEMPERATURE FOR THE MONTH OF NOVEMBER. THE PREVIOUS ALL TIME RECORD HIGH WAS 74 DEGREES WHICH WAS MOST RECENTLY SET ON NOVEMBER 7TH, 2020. **THE RECORD WARM LOW OF 59 DEGREES ON THE 6TH WAS ALSO A NEW ALL TIME RECORD WARM LOW TEMPERATURE FOR THE MONTH OF NOVEMBER. THE PREVIOUS ALL TIME RECORD WARM LOW TEMPERATURE WAS 57 DEGREES SET ON NOVEMBER 4TH, 1982. $$