Climatological Report (Monthly)
Issued by NWS Caribou, ME

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000 CXUS51 KCAR 042335 RRA CLMCAR CLIMATE REPORT NATIONAL WEATHER SERVICE CARIBOU, ME 734 PM EDT SAT NOV 4 2017 ................................... ...THE CARIBOU ME CLIMATE SUMMARY FOR THE MONTH OF OCTOBER 2017... CLIMATE NORMAL PERIOD 1981 TO 2010 CLIMATE RECORD PERIOD 1939 TO 2017 WEATHER OBSERVED NORMAL DEPART LAST YEAR`S VALUE DATE(S) VALUE FROM VALUE DATE(S) NORMAL ................................................................ TEMPERATURE (F) RECORD HIGH 82 10/09/2011 LOW 14 10/19/1972 10/22/1940 HIGHEST 79 10/04 MM MM 76 10/07 LOWEST 28 10/13 MM MM 27 10/15 10/03 AVG. MAXIMUM 62.2 52.0 10.2 56.3 AVG. MINIMUM 40.6 34.6 6.0 36.7 MEAN 51.4 43.3 8.1 46.5 DAYS MAX >= 90 0 0.0 0.0 0 DAYS MAX <= 32 0 0.1 -0.1 0 DAYS MIN <= 32 7 12.5 -5.5 7 DAYS MIN <= 0 0 0.0 0.0 0 PRECIPITATION (INCHES) RECORD MAXIMUM 8.73 1990 MINIMUM 0.63 1955 TOTALS 6.23 2.70 DAILY AVG. 0.20 0.11 0.09 0.08 DAYS >= .01 12 13.1 -1.1 12 DAYS >= .10 7 7.6 -0.6 7 DAYS >= .50 2 2.2 -0.2 2 DAYS >= 1.00 2 0.7 1.3 0 GREATEST 24 HR. TOTAL 2.92 10/26 TO 10/26 10/21 TO 10/22 10/25 TO 10/25 10/25 TO 10/25 SNOWFALL (INCHES) RECORDS TOTAL 12.1 1963 TOTALS 0.0 1.6 -1.6 T SINCE 7/1 0.0 1.7 -1.7 T SNOWDEPTH AVG. 0 MM MM 0 DAYS >= 1.0 0 0.3 -0.3 0 GREATEST SNOW DEPTH 0 MM 0 MM 24 HR TOTAL 0.0 10/31 TO 10/31 10/25 TO 10/25 10/25 TO 10/25 10/25 TO 10/25 DEGREE_DAYS HEATING TOTAL 414 673 -259 566 SINCE 7/1 684 1140 -456 851 COOLING TOTAL 1 0 1 0 SINCE 1/1 222 180 42 275 ...................................................... WIND (MPH) AVERAGE WIND SPEED 8.0 HIGHEST WIND SPEED/DIRECTION 37/170 DATE 10/30 HIGHEST GUST SPEED/DIRECTION 47/180 DATE 10/30 SKY COVER POSSIBLE SUNSHINE (PERCENT) MM AVERAGE SKY COVER 0.40 NUMBER OF DAYS FAIR 14 NUMBER OF DAYS PC 10 NUMBER OF DAYS CLOUDY 7 AVERAGE RH (PERCENT) 71 WEATHER CONDITIONS. NUMBER OF DAYS WITH THUNDERSTORM 0 MIXED PRECIP 0 HEAVY RAIN 6 RAIN 7 LIGHT RAIN 16 FREEZING RAIN 0 LT FREEZING RAIN 0 HAIL 0 HEAVY SNOW 0 SNOW 0 LIGHT SNOW 0 SLEET 0 FOG 14 FOG W/VIS <= 1/4 MILE 4 HAZE 0 - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. && ...NORTHERN AND EASTERN MONTHLY CLIMATE NARRATIVE... OCTOBER 2017 FINISHED AS THE WARMEST OCTOBER OF RECORD FOR THE REGION WITH WELL ABOVE AVERAGE RAINFALL. THE REGION AS A WHOLE AVERAGED 7.0 TO 8.5 DEGREES F ABOVE THE 1981- 2010 THIRTY YEAR MEAN WITH EACH CARIBOU, BANGOR, HOULTON, AND MILLINOCKET EXPERIENCING THE WARMEST OCTOBER OF RECORD UPWARDS BY AS MUCH AS ABOUT 2.5 DEGREES THEN THE PREVIOUS WARMEST OCTOBER. CONSISTENT WARMTH MARKED THE MONTH WITH FEW DAYS BELOW AVERAGE AND THE WARMEST HIGH TEMPERATURE ON THE 4TH. HOWEVER, THE GREATEST DAILY DEPARTURES WERE LOGGED BETWEEN THE 24TH AND 26TH WHICH FEATURED THE WARMEST OVERNIGHT LOW OF RECORD FOR THE MONTH AT SOME SITES ON THE 25TH. FOR THE 2 MONTH PERIOD OF SEPTEMBER THROUGH OCTOBER IT WAS THE WARMEST ON RECORD AT CARIBOU, HOULTON, MILLINOCKET, AND BANGOR. ALTHOUGH THE MONTH FINISHED WITH MUCH ABOVE AVERAGE RAINFALL ACROSS THE REGION RANGING FROM 130 TO 175 PERCENT OF NORMAL, PRIOR TO THE 25TH, THE MONTH WAS QUITE DRY WITH MANY SUNNY DAYS. THE BIG BREAK IN THE DRY REGIME OCCURRED ON THE 25TH AND 26TH WHEN LOW PRESSURE TRACKING WEST OF THE REGION COMBINED WITH A HIGHLY ANOMALOUS DEEP TROPICAL ATMOSPHERIC RIVER RESULTING IN VERY HEAVY RAINFALL OF 3.50 TO 7.00 INCHES ACROSS THE AREA FOR THE TWO DAY PERIOD. ADDITIONAL MODERATE TO HEAVY RAINFALL OCCURRED LATE ON THE 29TH THROUGH THE 30TH WITH INTENSE LOW PRESSURE TRACKING TO THE WEST OF THE REGION. RAINFALL RANKINGS FOR THE FOUR CLIMATE LOCATIONS RANGED FROM 6TH TO 13TH WETTEST OCTOBER ON RECORD. THE STORM ON THE 30TH WAS ALSO NOTEWORTHY BY BEING ACCOMPANIED BY DAMAGING WINDS ESPECIALLY ACROSS DOWNEAST AND FURTHER NORTH HIGHER TERRAIN LOCATIONS WHICH RESULTED IN MANY DOWNED TREES AND POWER LINES AND THE MOST WIDESPREAD POWER OUTAGES SINCE THE JANUARY 1998 ICE STORM. THE AMOUNT OF DOWNED TREES WAS LIKELY FACILITATED BY NEAR SATURATED SOILS FROM THE PRIOR RAINFALL OF THE 25TH AND 26TH. ALL AND ALL, A NOTEWORTHY MONTH. THE OUTLOOK FOR NOVEMBER 2017 IS CALLING FOR GREATER PROBABILITIES OF ABOVE AVERAGE TEMPERATURE AND NEAR TO ABOVE AVERAGE PRECIPITATION. AVERAGE LOW AND HIGH TEMPERATURES FOR THE MONTH RANGE FROM THE LOWER 20S TO MID 30S ACROSS THE EXTREME NORTH TO AROUND 30 TO UPPER 40S ALONG THE DOWNEAST COAST. AVERAGE PRECIPITATION RANGES FROM ABOUT 3.50 INCHES ACROSS THE FAR NORTH TO ABOUT 4.25 INCHES OVER DOWNEAST AREAS. AVERAGE SNOWFALL FOR THE MONTH RANGES FROM ABOUT 12 INCHES ACROSS THE EXTREME NORTH TO ABOUT 1 TO 2 INCHES ALONG THE DOWNEAST COAST. NEARLY 2 HOURS OF DAYLIGHT IS LOST DURING THE MONTH OF NOVEMBER. $$ VJN/CB

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