Climatological Report (Monthly) Issued by NWS Portland, ME
000
CXUS51 KGYX 011811
CLMCON
PWMCLMCON 000
TTAA00 GYX 011512
CLIMATE REPORT
NATIONAL WEATHER SERVICE GRAY ME
1112 AM EDT MON MAY 01 2023
...................................
...THE CONCORD NH CLIMATE SUMMARY FOR THE MONTH OF APRIL 2023...
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1868 TO 2023
WEATHER OBSERVED NORMAL DEPART LAST YEAR`S
VALUE DATE(S) VALUE FROM VALUE DATE(S)
NORMAL
................................................................
TEMPERATURE (F)
RECORD
HIGH 95 04/19/1976
LOW 4 04/05/2016
HIGHEST 90 04/14 82 8 69 04/12
LOWEST 18 04/03 20 -2 25 04/18
04/21
AVG. MAXIMUM 59.3 57.5 1.8 57.2
AVG. MINIMUM 36.9 33.3 3.6 33.7
MEAN 48.1 45.4 2.7 45.5
DAYS MAX >= 90 1 0.2 0.8 0
DAYS MAX <= 32 0 0.2 -0.2 0
DAYS MIN <= 32 7 16.0 -9.0 12
DAYS MIN <= 0 0 0.0 0.0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 7.74 1904
MINIMUM 0.42 1941
TOTALS 4.12 3.43 0.69 3.60
DAILY AVG. 0.14 0.11 0.03 0.12
DAYS >= .01 11 11.4 -0.4 11
DAYS >= .10 5 6.9 -1.9 7
DAYS >= .50 2 2.3 -0.3 3
DAYS >= 1.00 1 0.7 0.3 1
GREATEST
24 HR. TOTAL 2.46 04/23
SNOWFALL (INCHES)
RECORDS
TOTAL 35.0 1874
TOTALS T 2.5 -2.5 0.0
SINCE 7/1 64.5 67.7 -3.2 44.6
SNOWDEPTH AVG. 0
DAYS >= TRACE 1 1.3 -0.3 0
DAYS >= 1.0 0 0.6 -0.6 0
GREATEST
SNOW DEPTH 4 04/01
24 HR TOTAL T 04/02 TO 04/02
DEGREE DAYS
HEATING TOTAL 505 590 -85 579
SINCE 7/1 5888 6630 -742 6182
COOLING TOTAL 4 2 2 0
SINCE 1/1 4 2 2 0
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WIND (MPH)
AVERAGE WIND SPEED 6.1
HIGHEST WIND SPEED/DIRECTION 32/310 DATE 04/12
HIGHEST GUST SPEED/DIRECTION 48/320 DATE 04/12
SKY COVER
AVERAGE SKY COVER 0.51
AVERAGE RH (PERCENT) 65
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 0 HEAVY RAIN 2
RAIN 3 LIGHT RAIN 14
FREEZING RAIN 0 LT FREEZING RAIN 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 1 FOG 15
FOG W/VIS <= 1/4 MILE 4 HAZE 1
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
&&
AN AREA OF LOW PRESSURE TRACKED FROM THE GREAT LAKES THROUGH THE ST
LAWRENCE VALLEY BRINGING A SOAKING RAIN TO THE CONCORD AREA TO START
THE MONTH. COOLER AND DRIER AIR FUNNELED INTO THE REGION BEHIND THIS
SYSTEM RESULTING IN A COUPLE OF COLD NIGHTS WITH THE COLDEST
OCCURRING ON THE 3RD WHEN THE LOW WAS 18 DEGREES. TEMPERATURES
TRENDED BELOW NORMAL INTO THE SECOND WEEK OF THE MONTH FOLLOWED BY A
PATTERN CHANGE WITH A RIDGE OF HIGH PRESSURE BUILDING OVER THE EAST
COAST. THIS RIDGE OF HIGH PRESSURE LED TO A PERIOD OF WARM AND DRY
WEATHER WITH EXCEPTIONAL WARMTH OCCURRING ON THE 13TH AND 14TH WHEN
THE HIGH REACHED 89 AND 90 DEGREES, RESPECTIVELY. THIS PERIOD OF WARMTH
CAME TO AN END WHEN AN OMEGA BLOCK FORMED OVER EASTERN NORTH AMERICA
AND THE NORTHERN ATLANTIC THAT PERSISTED THROUGH THE SECOND HALF OF
THE MONTH. NORTHERN NEW ENGLAND REMAINED UNDER THE WESTERN UPPER LOW
OF THE OMEGA BLOCK THAT LED TO A PROLONGED PERIOD OF DREARY WEATHER
WITH RAIN, DRIZZLE, AND TEMPERATURES RUNNING BELOW NORMAL. DURING
THIS PERIOD A SLOW MOVING FRONTAL SYSTEM BROUGHT 2.46 INCHES OF RAIN
ON THE 23RD AND ANOTHER SIGNIFICANT SYSTEM ON THE 30TH, ALTHOUGH THE
IMPACTS FROM THIS SECOND SYSTEM WERE FOCUSED IN THE WHITE MOUNTAINS
TO CENTRAL MAINE.
THE AVERAGE TEMPERATURE FOR THE MONTH WAS 48.1 DEGREES, WHICH WAS
2.7 DEGREES ABOVE NORMAL. THE WARMEST APRIL ON RECORD WAS IN 1941
WHEN THE AVERAGE TEMPERATURE WAS 51.4 DEGREES. THE COOLEST WAS 37.0
DEGREES IN 1874.
A TOTAL OF 4.12 INCHES OF PRECIPITATION FELL, WHICH WAS 0.69 INCHES
ABOVE NORMAL. THE HEAVIEST PRECIPITATION FELL ON THE 23RD WHEN 2.46
INCHES OF RAIN FELL. THE WETTEST APRIL ON RECORD WAS IN 1904 WHEN
7.44 INCHES FELL. THE DRIEST WAS 0.42 INCHES IN 1941.
ONLY A TRACE OF SNOWFALL WAS RECORDED FOR THE MONTH OF APRIL, WHICH
WAS 2.5 INCHES BELOW NORMAL. THERE HAS BEEN 11 APRILS ON RECORD WHEN
NO SNOWFALL OCCURRED AT CONCORD. THE SNOWIEST APRIL ON RECORD WAS IN
1874 WHEN 35.0 INCHES OF SNOW FELL.
THE FOLLOWING DAILY RECORDS WERE SET OR TIED IN APRIL 2023...
DATE RECORD PREVIOUS
APR 13 89 - WARMEST HIGH TEMPERATURE 88 IN 1945
APR 14 90 - WARMEST HIGH TEMPERATURE 84 IN 1870
APR 23 2.46 - GREATEST PRECIPITATION 1.55 IN 1977
$$
DS