Monday, May 25, 2020

DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, MAY 25, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

DREARY START TO THE DAY, IMPROVING THIS AFTERNOON…

Once again we had an onshore flow this morning which
brought low clouds, drizzle and fog overnight lasting
through the morning. 0.02″ of drizzle was measured at
7am. Visibility for a time this morning did get as low
as 1/16th of a mile in the densest fog.

As we’ve gotten into the afternoon hours however, clouds
are lifting and visibility has improved to around 15
miles. Also a light and variable wind is veering around
to the south and south-west, bringing with it warmer and
more humid air. The dew point has been gradually increasing
through the day having now reached the low 50s at 1 pm.

With breaks of sun developing, temperatures are responding
reaching 60 degrees at 1 pm.

The high so far today is 60F, this is 9 degrees below
the daily normal high of 69F. The low since midnight is
46F, which is 5 degrees below the daily normal low of
51F.

Today’s Observations:

7 A.M.
Weather: Sky obscured, vertical visibility 200 feet,
light drizzle
Temperature: 48F; Dew Point: 48F; Relative Humidity: 100%
Wind: NE at 6 kts
Sea-level pressure: 30.30 ins. Hg: rising, then more rapidly
Visibility: 1/8 mile, fog
6-hr Max temp: 48F
6-hr Min temp: 46F
24-hr Precip:  0.02 ins.
24-hr Snowfall: 0.0 ins.
BHO SA 1155 X W2 1/8L-F 261/48/48/0506/030/ PCPN VRY LGT
WND LGT/ 8//// 53009 6002 70002 10048 20046

10 A.M.
Weather: Sky obscured, vertical visibility 300 feet
Temperature: 53F; Dew Point: 51F; Relative Humidity: 93%
Wind: ENE at 4 kts
Sea-level pressure: 30.27 ins. Hg: falling, then more rapidly
Visibility: 1 mile, fog
3-hr Precip: Trace
3-hr Snowfall: 0.0 ins.
BHO SA 1455 X W3 1F 252/53/51/0604/027/ WND LGT/ 8//// 58009 6000

1 P.M.
Weather: Broken stratus, overcast cirrus, few breaks in overcast
all quadrants, sun dimly visible
Temperature: 60F; Dew Point: 53F; Relative Humidity: 76%
Wind: SSE at 3 kts, wind light and variable
Sea-level pressure: 30.27 ins. Hg: rising then falling
Visibility: 15 miles, hazy
6-hr Max temp: 60F
6-hr Min temp: 48F
6-hr Precip: Trace
6-hr Snowfall: 0.0 ins.
BHO SA 1755 E10 BKN 250 OVC 15 251/60/53/1503/027/ FEW BINOVC ALQDS
SUN DMLY VSBL HAZY WND L/V/ 8/702 58001 6000 10060 20048

SUMMARY FOR SUNDAY, MAY 24, 2020

TEMPERATURE (DEGREES F)
MAX…..58   NORMAL…..69
MIN…..43   NORMAL…..50
MEAN….51   NORMAL…..59

DEPARTURE FROM 30-YEAR NORMAL……………… -8
TOTAL DEPARTURE FOR THE MONTH………………-57 [-2.6 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………14  DEPARTURE……..+7
TOTAL HEATING UNITS FOR THE MONTH…………..273  DEPARTURE…….+45
TOTAL HEATING UNITS FOR THE SEASON…………5794  DEPARTURE……-469
TOTAL HEATING UNITS LAST SEASON TO DATE…….6173  DEPARTURE……-379

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………….0  DEPARTURE……..-1
TOTAL COOLING UNITS FOR THE MONTH…………….3  DEPARTURE…….-10
TOTAL COOLING UNITS FOR THE SEASON……………3  DEPARTURE…….-12
TOTAL COOLING UNITS LAST SEASON TO DATE……….4  DEPARTURE……..-1

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..27 ENE AT  6:22 A.M.
AERO…………………….24 ENE AT 10:23 A.M.
ASOS…………………….25 ENE AT  6:22 A.M.
DAVIS……………………26 ENE AT  6:23 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY………………….17 ENE AT 10:21 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….17 ENE AT 10:21 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………18 ENE AT  6:23 A.M.
AVERAGE WIND SPEED AND DIRECTION…………….10.0 ENE
ASOS…………………….10.6
DAVIS……………………10.5 ENE [067 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.02  DEPARTURE……-0.14
ASOS…………..0.01
TOTAL PRECIPITATION FOR THE MONTH……….2.59  DEPARTURE……-0.47
ASOS…………..2.56
TOTAL PRECIPITATION FOR THE YEAR……….19.63  DEPARTURE……-1.98
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/…/..         39 S    AERO 43 S   RMY 41
05/12  55/37/46/-10/0.00/0.0/…/..        37 W    AERO 37 W   RMY 37
05/13  59/32/46/-10/0.00/0.0/…/..        37 WNW  AERO 37 WNW RMY 38
05/14  70/40/55/-2/0.00/0.0/…/..         29 W    AERO 26 W   RMY 27
05/15  78/50/64/+7/…./0.0/…/..         40 WSW  AERO 40 WSW RMY 43
05/16  69/47/58/+1/…./0.0/…/..         31 NW   AERO 31 NW  RMY 32
05/17  67/47/57/0/0.00/0.0/…/..          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 25
HIGH 91F IN 2007
LOW 37F IN 1967
PRECIP 3.73 INS IN 1967
PEAK GUST 83 MPH NE IN 1967 (RECORD FOR MAY)

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

TODAY’S REPORT PREPARED BY: Matt Douglas