Tuesday, May 26, 2020

BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA

DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, MAY 26, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

EARLY FOG BURNS OFF TO MAINLY SUNNY SKIES, MUCH WARMER
AND MORE HUMID…

A return to more summer-like conditions has arrived today
after early morning clouds and fog burned off. An abundance
of sunshine then developed and has been engaged with an
interplay with cumulus clouds early this afternoon.

Temperatures have responded with readings into the upper
70s early this afternoon, destined to reach the low 80s.

Humidity levels have also been on the rise with the dew
point rising from the mid-upper 50s early this morning to
the low 60s early this afternoon, just adding to the
summery feel.

Wind has been a non-issue with generally light and variable
being the theme today. Peak gust thus far has only been
around 16 mph!

The high so far today is 79F, this is 10 degrees above
the daily normal high of 69F. The low since midnight is
56F, which is 5 degrees above the daily normal low of
51F.

Today’s Observations:

7 A.M.
Weather: Scattered undercast, scattered stratus, scattered altocumulus,
thin broken cirrus
Temperature: 63F; Dew Point: 57F; Relative Humidity: 80%
Wind: Calm
Sea-level pressure: 30.24 ins. Hg: rising, then more slowly
Visibility: 10 miles, 20 SE
6-hr Max temp: 63F
6-hr Min temp: 57F
24-hr Precip: Trace
24-hr Snowfall: 0.0 ins.
BHO SA 1155 /// SCT 10 SCT 90 SCT 250 –BKN 10 240/63/57/0000/024/
UNDERCAST NW-NE VSBY 10 NW-NE ABV UNDERCAST 20 SE WND CALM/ 8/771
51008 70000 10063 20057

10 A.M.
Weather: Scattered cumulus, thin scattered cirrus
Temperature: 73F; Dew Point: 60F; Relative Humidity: 64%
Wind: SE at 5 kts, wind light and variable
Sea-level pressure: 30.22 ins. Hg: rising then falling
Visibility: 30 miles, hazy
3-hr Precip:  0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 25 SCT 250 –SCT 30 235/73/60/1405/022/ HAZY WND L/V/
8/101 58005

1 P.M.
Weather: Scattered cumulus, thin scattered cirrus, fog bank along
shore distant NNE and offshore distant NE-ESE
Temperature: 79F; Dew Point: 62F; Relative Humidity: 57%
Wind: E at 5 kts, wind light and variable
Sea-level pressure: 30.19 ins. Hg: falling, then more rapidly
Visibility: 30 miles, hazy
6-hr Max temp: 79F
6-hr Min temp: 63F
6-hr Precip:  0.00 ins.
6-hr Snowfall: 0.0 ins.
BHO SA 1755 40 SCT 250 –SCT 30 225/79/62/0905/019/ FG BNK ALNG SHR
DSNT NNE AND OFFSHR DSNT NE-ESE HAZY WND L/V/ 8/201 58010 10079
20063

SUMMARY FOR MONDAY, MAY 25, 2020

TEMPERATURE (DEGREES F)
MAX…..66   NORMAL…..69
MIN…..46   NORMAL…..51
MEAN….56   NORMAL…..60

DEPARTURE FROM 30-YEAR NORMAL……………… -4
TOTAL DEPARTURE FOR THE MONTH………………-61 [-2.6 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………… 9  DEPARTURE……..+3
TOTAL HEATING UNITS FOR THE MONTH…………..282  DEPARTURE…….+48
TOTAL HEATING UNITS FOR THE SEASON…………5803  DEPARTURE……-466
TOTAL HEATING UNITS LAST SEASON TO DATE…….6177  DEPARTURE……-374

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………….0  DEPARTURE……..-1
TOTAL COOLING UNITS FOR THE MONTH…………….3  DEPARTURE…….-11
TOTAL COOLING UNITS FOR THE SEASON……………3  DEPARTURE…….-13
TOTAL COOLING UNITS LAST SEASON TO DATE……….4  DEPARTURE……..-1

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..18 ENE AT  6:13 A.M.
AERO…………………….18 ENE AT  6:13 A.M.
ASOS…………………….17 ENE AT  6:14 A.M.
DAVIS……………………17 ENE AT  6:12 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY………………….12 ENE AT  6:13 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….13 ENE AT  6:15 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………13 E   AT  6:14 A.M.
AVERAGE WIND SPEED AND DIRECTION……………. 6.7 E
ASOS……………………. 7.0
DAVIS…………………… 7.1 E [084 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…Trace  DEPARTURE……-0.15
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….2.59  DEPARTURE……-0.62
ASOS…………..2.56
TOTAL PRECIPITATION FOR THE YEAR……….19.63  DEPARTURE……-2.13
ASOS………….20.16

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0  DEPARTURE……..0.0
TOTAL SNOWFALL FOR THE MONTH…………..Trace  DEPARTURE……..0.0
TOTAL SNOWFALL FOR THE SEASON…………..31.9  DEPARTURE……-30.8

PRELIMINARY CLIMATE SUMMARY FOR MAY CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/PEAK GUST/AERO/RMY GUST
AERO: Aerovane wind recording system gust
RMY:  R.M. Young wind gust recording system
TSTM: Thunderstorm day (thunder heard some time during day)
….: Data not yet available, records not finalized
M:    Missing data

05/01  64/52/58/+5/…./0.0/000/00         46 SSE  AERO 44 SSE RMY N/A
05/02  70/42/56/+3/…./0.0/729/86         41 NW   AERO 40 NW  RMY N/A
05/03  78/55/67/+14/0.00/0.0/613/72        35 SSW  AERO 35 SSW RMY 36
05/04  72/45/59/+5/T/0.0/247/29            37 NW   AERO 40 WNW RMY 39
05/05  60/40/50/-4/0.00/0.0/821/96         31 NW   AERO 32 NW  RMY N/A
05/06  57/38/48/-6/T/0.0/498/58            24 ESE  AERO 22 ENE RMY 22
05/07  63/37/50/-5/0.00/0.0/576/67         30 WSW  AERO 29 WSW RMY N/A
05/08  57/40/49/-6/…./0.0/328/38         31 W    AERO 32 W   RMY N/A
05/09  44/32/38/-17/…./T/484/56          52 W    AERO 53 W   RMY 54
05/10  59/31/45/-10/0.00/0.0/763/88        46 W    AERO 46 W   RMY 49
05/11  65/43/54/-2/0.22/0.0/322/37         39 S    AERO 43 S   RMY 41
05/12  55/37/46/-10/0.00/0.0/801/92        37 W    AERO 37 W   RMY 37
05/13  59/32/46/-10/0.00/0.0/864/99        37 WNW  AERO 37 WNW RMY 38
05/14  70/40/55/-2/0.00/0.0/831/95         29 W    AERO 26 W   RMY 27
05/15  78/50/64/+7/…./0.0/535/61         40 WSW  AERO 40 WSW RMY 43
05/16  69/47/58/+1/…./0.0/730/83         31 NW   AERO 31 NW  RMY 32
05/17  67/47/57/0/0.00/0.0/132/15          22 SSW  AERO N/A    RMY 21
05/18  60/47/54/-4/T/0.0/…/..            24 W    AERO 22 ENE RMY N/A
05/19  56/45/51/-7/0.00/0.0/…/..         35 ENE  AERO 34 ENE RMY 32
05/20  63/43/53/-5/0.00/0.0/…/..         22 ESE  AERO 20 SE  RMY 19
05/21  76/42/59/0/0.00/0.0/…/..          26 S    AERO 25 S   RMY 25
05/22  82/50/66/+7/0.00/0.0/…/..         29 W    AERO 29 W   RMY 28
05/23  67/44/56/-3/0.02/0.0/…/..         42 ENE  AERO 43 ENE RMY 40
05/24  58/43/51/-8/T/0.0/…/..            27 ENE  AERO 24 ENE RMY N/A

05/25 The low since midnight is 46F, the daily normal low is 51F

DAILY RECORDS FOR MAY 2020

5/13/2020: NEW RECORD LOW OF 32F, REPLACING 35F SET IN
1914 AND 2005

DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):

RECORDS FOR MAY 26
HIGH 94F IN 2010
LOW 37F IN 1972,2013
PRECIP 1.73 INS IN 2003
SNOWFALL TRACE IN 1967 (Fell as ice pellets in nor’easter)
PEAK GUST 62 MPH NE IN 1967

RECORDS FOR MAY 27
HIGH 92F IN 1914
LOW 36F IN 1915
PRECIP 1.40 INS IN 1898
PEAK GUST 55 S IN 1956

TODAY’S REPORT PREPARED BY: Matt Douglas