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

TUESDAY JUNE 1, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0410E
SUNSET:  1915E

WARMER TODAY, BUT LIMITED SUN THANKS TO A DECK OF MID AND
UPPER LEVEL CLOUDS....

Despite not having much sun again today, I'm sure many are
not complaining since it's dry and much warmer than the past
few days. A deck of mainly high clouds (with some mid level
clouds floating by at times) has filtered the sun a great
deal. Even so, temperatures have been able to reach the low
to mid 70s.

Once again today there has been little wind to speak of. The
average speed since 7 A.M. is only around 7 mph. The peak
gust so far is only 17 mph, way back at 2:30 A.M.!!

Visibility hasn't been great today, generally hanging out
between 30-35 miles due to haziness.

The high so far today is 70F, which is 1 degree below
the normal high of 71F. The low since midnight is 50F,
which is 3 degrees below the daily normal low of 53F.


Today's Observations:

7 A.M.
Weather: Broken cirrostratus, thin broken cirrus,
few altocumulus SW-N
Temperature: 55F; Dew Point: 47F; Relative Humidity: 74%
Wind: W @ 10 kts
Sea-level pressure: 30.24 in. Hg; rising, then more slowly
Visibility: 35 mile, hazy
6-hr Max temp: 55F
6-hr Min temp: 50F
24-hr Precip: 0.02 ins.
BHO SA 1155 E200 BKN 250 -BKN 35 241/55/47/2610/024/
FEW AC SW-N HAZY/ 8/058 51013 70002 10055 20050

10 A.M.
Weather: Overcast cirrostratus, few altocumulus distant N-NE
Temperature: 66F; Dew Point: 52F; Relative Humidity: 60%
Wind: W @ 5 kts, wind light
Sea-level pressure: 30.24 in Hg; rising, then falling
Visibility: 30 miles, hazy
3-hr Precip: 0.00 ins.
BHO SA 1455 E200 OVC 30 241/66/52/2605/024/ FEW AC DSNT N-NE
WND LGT HAZY/ 8/057 50000

1 P.M.
Weather: Broken altocumulus, overcast cirrostratus,
few breaks in overcast distant WNW-NE, few cumulus distant NNW-NE
Temperature: 69F, Dew point: 51F; Relative Humidity: 52%
Wind: W @ 7 kts
Sea-level pressure: 30.22 in Hg; falling, then more rapidly
Visibility: 35 miles, hazy
6-hr Max temp: 70F
6-hr Min temp: 55F
6-hr Precip: 0.00 ins.
BHO SA 1755 E140 BKN 200 OVC 35 232/69/51/2607/022/
FEW BINOVC DSNT WNW-NE FEW CU DSNT NNW-NE SUN DMLY VSBL
HAZY/ 8/257 58009 10070 20055

SUMMARY FOR MONDAY, MAY 31, 2021

TEMPERATURE (DEGREES F)
MAX.......57     NORMAL.....71
MIN.......46     NORMAL.....52
MEAN......52     NORMAL.....61

DEPARTURE FROM 30-YEAR (1981-2010) NORMAL....... -9
TOTAL DEPARTURE FOR THE MONTH...................+36 [+1.0 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL THRU JUN)
TOTAL HEATING UNITS FOR YESTERDAY...............13  DEPARTURE...... +8
TOTAL HEATING UNITS FOR THE MONTH..............237  DEPARTURE......-31
TOTAL HEATING UNITS FOR THE SEASON............5578  DEPARTURE.....-725
TOTAL HEATING UNITS LAST SEASON TO DATE.......5812  DEPARTURE.....-234

COOLING DEGREE DAYS (SEASON JAN THRU DEC)
TOTAL COOLING UNITS FOR YESTERDAY............... 0  DEPARTURE.......-1
TOTAL COOLING UNITS FOR THE MONTH...............29  DEPARTURE.......+7
TOTAL COOLING UNITS FOR THE SEASON..............29  DEPARTURE.......+5
TOTAL COOLING UNITS LAST SEASON TO DATE.........32  DEPARTURE.......-3

PEAK WIND GUST (MPH):
                     420C/Official..............22 NNE @ 12:37 A.M.
                     AEROVANE (south tower).....25 WNW @  5:54 P.M.
                     ASOS.......................22 NNE @ 12:00 A.M.
                     DAVIS #1...................22 W   @  5:53 P.M.
                     DAVIS #2 (south tower).....24 WNW @  5:52 P.M.
                     RMY........................25     @ 12:37 A.M.
                     VECTOR.....................25     @  5:47 P.M.
                     MERLIN.....................23

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL..................16 WNW @  6:00 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE...................16 W   @ 10:30 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE...............16 WNW @  6:00 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE...............18 WNW @  5:53 P.M.
MAXIMUM 2-MINUTE RMY AVERAGE....................15 ENE @ 12:37 A.M.
MAXIMUM 2-MINUTE VECTOR AVERAGE.................16     @  5:57 P.M.

AVERAGE WIND SPEED AND DIRECTION:
                     CONTACTING/OFFICIAL....... 9.9 WNW [237 total miles]
                     ASOS...................... 9.9
                     DAVIS #1..................10.2 NW
                     DAVIS #2..................10.3 NW
                     RMY....................... 9.3 NNW
                     VECTOR.................... 9.9


PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.......0.02  DEPARTURE....-0.15
                             ASOS.............0.02
TOTAL PRECIPITATION FOR THE MONTH.............5.60  DEPARTURE....+1.49
                             ASOS.............5.58
TOTAL PRECIPITATION FOR THE YEAR.............20.66  DEPARTURE....-2.17
                              ASOS...........20.86


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   62/38/50/-3/0.06/0.0/659/78       31 WNW  AERO 35 WNW  RMY 40
05/02   76/48/62/+9/0.01/0.0/220/26       41 SW   AERO 41 SW   RMY 46
05/03   67/48/58/+5/0.07/0.0/400/47       21 E    AERO 20 E    RMY 20
05/04   50/44/47/-7/0.78/0.0/000/00       36 NNE  AERO 32 NNE  RMY 37
05/05   48/44/46/-8/0.47/0.0/000/00       18 ESE  AERO 14 ESE  RMY 17
05/06   64/45/55/+1/0.00/0.0/780/91       33 NW   AERO 38 NNW  RMY 39
05/07   61/43/52/-3/0.00/0.0/516/60       28 ESE  AERO 22 ESE  RMY 26
05/08   54/40/47/-8/0.00/0.0/069/08       24 SSW  AERO 23 SSW  RMY 25
05/09   66/42/54/-1/T/0.0/579/67          30 SW   AERO 29 SW   RMY 34
05/10   60/45/53/-2/0.39/0.0/078/09       21 W    AERO 20 W    RMY 20
05/11   63/45/54/-2/0.00/0.0/764/88       38 WNW  AERO 41 WNW  RMY 41
05/12   65/41/53/-3/0.00/0.0/722/83       28 NW   AERO M  M    RMY 31
05/13   69/45/57/+1/0.00/0.0/759/87       22 WNW  AERO 21 WNW  RMY 21
05/14   76/49/63/+8/0.00/0.0/725/83       23 WNW  AERO 23 WNW  RMY 25
05/15   75/55/65/+8/0.01/0.0/569/65       24 SSE  AERO 26 SSE  RMY 26
05/16   78/54/66/+9/0.01/0.0/483/55       36 W    AERO 37 W    RMY 42
05/17   77/52/65/+8/0.00/0.0/722/82       20 SSW  AERO 21 SSW  RMY 21
05/18   81/54/68/+10/T/0.0/600/68         32 W    AERO 30 W    RMY 32
05/19   75/55/65/+7/0.00/0.0/778/88       25 NE   AERO 23 NNE  RMY 27
05/20   75/52/64/+6/0.00/0.0/842/95       18 ESE  AERO 18 ESE  RMY 19
05/21   78/50/64/+5/T/0.0/524/59          23 S    AERO 22 S    RMY 26
05/22   87/56/72/+13/T/0.0/285/32         25 WNW  AERO 21 WNW  RMY 24
05/23   87/58/73/+14/T/0.0/687/77         38 NNW  AERO 37 NNW  RMY 40
05/24   70/49/60/+1/0.00/0.0/.../..       30 S    AERO 35 S    RMY 33
05/25   75/47/61/+1/0.00/0.0/.../..       31 SW   AERO 35 SW   RMY 34
05/26   86/57/72/+12/0.21/0.0/.../..      30 S    AERO 36 S    RMY 35 TSTM
05/27   79/57/68/+8/0.02/0.0/.../..       25 N    AERO 25 WNW  RMY 27
05/28   58/43/51/-10/1.00/0.0/.../..      28 ENE  AERO 32 ENE  RMY 27
05/29   46/42/44/-17/1.50/0.0/.../..      44 ENE  AERO 47 ENE  RMY 50
05/30   46/45/46/-15/0.87/0.0/.../..      37 NE   AERO 40 NE   RMY 40
05/31   57/46/52/-9/0.20/0.0/.../..       22 NNE  AERO 25 WNW  RMY 25

06/01   The low since midnight is 50F, the daily normal low is 53F
 

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

RECORDS FOR JUNE 1
HIGH 90F IN 1937,2013
LOW 36F IN 1945 [Record for month]
PRECIP 2.28 INS IN 1992
PEAK GUST 51e MPH SE IN 1952

RECORDS FOR JUNE 2
HIGH 91F IN 1895
LOW 41F IN 1907, 1929
PRECIP 2.36 INS IN 1982
SNOWFALL TRACE IN 1907 (ICE PELLETS)
PEAK GUST 63 MPH NW IN 2000

TODAY'S REPORT PREPARED BY: Matt Douglas