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

TUESDAY, JUNE 23, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

WARMER AND HUMID TODAY WITH PLENTY OF SUNSHINE....

After our brief reprieve from the heat yesterday, 
today mother nature has turned the thermostat back
up and ratcheted up the humidity levels a bit as well.

After some early morning fog burned off, temperatures
responded quickly to the sun with readings rapidly
rising through the 70s to low 80s by late morning, 
and mid 80s by early this afternoon.

A southerly wind which started light has gradually 
increased as mixing from aloft occurred. Gusts of 
20-25 mph are being measured early this afternoon.

The dew point briefly touched 70 as well late this 
morning, before slipping back a bit this afternoon
thanks to some drier air mixing down from aloft.

Visibility has been limited all day, starting
at around 1/2 mile around 5-6 A.M. this morning,
increasing to around 30 miles by early this afternoon
with hazy conditions.

We continue with an abnormally dry pattern. Our monthly
deficit is now 0.63" below normal. For the year we're
running at 3.50" below normal!  

The high so far today is 85 degrees, this is 8 degrees
above the daily normal high of 77F. The low since
midnight is 65F, which is 6 degrees above the daily
normal low of 59F.


Today's Observations:

7 A.M.
Weather: Broken stratus fractus, thin broken cirrus
Temperature: 70F; Dew Point: 67F; Relative Humidity: 90%
Wind: SSW at 5 kts, wind light  
Sea-level pressure: 29.87 ins. Hg: rising, then falling
Visibility: 15 miles, hazy
6-hr Max temp: 70F
6-hr Min temp: 65F
24-hr Precip: Trace
24-hr Frozen:   0.0 ins.
BHO SA 1155 E2 BKN 250 –BKN 15 116/70/67/2005/987/ HAZY WND LGT/
8/601 50000 70000 10070 20065

10 A.M.
Weather: Thin broken cirrus, few moderate cumulus distant SW,
few towering cumulus distant W-NW
Temperature: 80F; Dew Point: 70F; Relative Humidity: 72%
Wind: S at 5 kts, wind light
Sea-level pressure: 29.86 ins. Hg: falling, then steady
Visibility: 25 miles, hazy
3-hr Precip:  0.00 ins.
3-hr Frozen:   0.0 ins.
BHO SA 1455 E250 –BKN 25 111/80/70/1805/986/ FEW MDT CU DSNT SW
FEW TCU DSNT W-NW HAZY WND LGT/ 8/201 56005

1 P.M.
Weather: Scattered Cumulus, thin broken cirrus, cumulonimbus
distant WNW, few moderate cumulus SW-W
Temperature: 84F; Dew Point: 69F; Relative Humidity: 61%
Wind: SSW at 13G17 kts
Sea-level pressure: 29.81 ins. Hg: falling, then more rapidly
Visibility: 30 miles, hazy
6-hr Max temp: 85F
6-hr Min temp: 70F
6-hr Precip:  0.00 ins.
6-hr Frozen:   0.0 ins.
BHO SA 1755 35 SCT E250 –BKN 30 093/84/69/2013G17/981/ CB DSNT WNW
FEW MDT CU SW-W HAZY/ 8/901 58018 10085 20070


SUMMARY FOR MONDAY, JUNE 22, 2020 

TEMPERATURE (DEGREES F)
MAX.....77   NORMAL.....77
MIN.....65   NORMAL.....59
MEAN....71   NORMAL.....68

DEPARTURE FROM 30-YEAR NORMAL................. +3
TOTAL DEPARTURE FOR THE MONTH.................+56 [+2.3 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY................0  DEPARTURE....... -1
TOTAL HEATING UNITS FOR THE MONTH...............40  DEPARTURE.......-26
TOTAL HEATING UNITS FOR THE SEASON............5852  DEPARTURE......-517
TOTAL HEATING UNITS LAST SEASON TO DATE.......6254  DEPARTURE......-402

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY............... 6  DEPARTURE....... +2
TOTAL COOLING UNITS FOR THE MONTH...............96  DEPARTURE.......+32
TOTAL COOLING UNITS FOR THE SEASON.............128  DEPARTURE.......+40
TOTAL COOLING UNITS LAST SEASON TO DATE.........42  DEPARTURE.......+86

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY....................15 E   AT 12:59 P.M.  
                   AERO.........................17 S   AT  8:55 P.M.  
                   ASOS.........................15 S   AT  8:57 P.M. 
                   DAVIS........................15 NE  AT  1:00 P.M. RMY 14
FASTEST MILE FOR YESTERDAY......................11 E   AT  5:43 P.M. 
MAXIMUM 2-MINUTE ASOS AVERAGE...................12 S   AT  9:37 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE..................12 E   AT  5:56 P.M.
AVERAGE WIND SPEED AND DIRECTION...............6.4 E               
                   ASOS....................... 6.5
                   DAVIS...................... 6.8 ESE [117 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M...Trace  DEPARTURE......-0.11
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........2.74  DEPARTURE......-0.63
                         ASOS..............2.74
TOTAL PRECIPITATION FOR THE YEAR..........22.53  DEPARTURE......-3.50
                         ASOS.............23.05


PRELIMINARY CLIMATE SUMMARY FOR JUNE CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/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

06/01  64/42/53/-9/T/0.0/.../..            28 WNW  AERO 29 WNW RMY 28
06/02  72/45/59/-3/..../0.0/.../..         28 W    AERO 27 W   RMY 28
06/03  79/55/67/+5/T/0.0/.../..            29 W    AERO 28 W   RMY 26
06/04  87/62/75/+12/..../0.0/.../..        26 W    AERO 25 S   RMY N/A
06/05  80/65/73/+10/..../0.0/.../..        28 SSW  AERO 28 SSW RMY N/A TSTM
06/06  86/57/72/+9/..../0.0/.../..         55 SW   AERO 59 SW  RMY 59  TSTM
06/07  68/54/61/-3/0.00/0.0/.../..         24 NW   AERO 24 NW  RMY N/A
06/08  77/51/64/0/0.00/0.0/.../..          25 W    AERO 24 W   RMY 25
06/09  77/60/69/+5/T/0.0/.../..            23 E    AERO 21 E   RMY N/A
06/10  70/58/64/-1/T/0.0/.../..            25 E    AERO 24 E   RMY N/A
06/11  71/64/68/+3/0.62/0.0/.../..         40 S    AERO 40 S   RMY 42
06/12  82/63/73/+8/0.00/0.0/.../..         26 W    AERO 25 W   RMY 27
06/13  71/53/62/-3/0.00/0.0/.../..         21 WNW  AERO 20 WNW RMY N/A       
06/14  67/49/58/-8/0.00/0.0/.../..         21 E    AERO 21 ENE RMY 21
06/15  67/53/60/-6/5/0/0.0/.../..          21 NE   AERO 16 ENE RMY 20
06/16  73/54/64/-2/0.00/0.0/.../..         18 E    AERO 18 E   RMY 18
06/17  78/57/68/+1/0.00/0.0/.../..         20 S    AERO 20 S   RMY 20
06/18  86/59/73/+6/0.00/0.0/.../..         22 S    AERO 22 SSW RMY 22
06/19  86/66/76/+9/0.00/0.0/.../..         22 S    AERO 22 S   RMY 21
06/20  90/65/78/+10/0.00/0.0/.../..        22 S    AERO 21 S   RMY 21
06/21  90/66/78/+10/0.83/0.0/.../..        33 ESE  AERO 35 ESE RMY 33  TSTM
06/22  77/65/71/+3/0.00/0.0/.../..         15 E    AERO 17 S   RMY 14

06/23 The low since midnight is 65F, the daily normal low is 59F

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

RECORDS FOR JUNE 23
HIGH 93F IN 1888
LOW 45F IN 1885
PRECIP 0.70 INS IN 2006
PEAK GUST 63 MPH SE IN 1972 (AGNES)

RECORDS FOR JUNE 24
HIGH 91F IN 1914,1976,2013
LOW 40F IN 1932
PRECIP 2.80 INS IN 1929
PEAK GUST 54 MPH WNW IN 2010

TODAY'S REPORT PREPARED BY: Matt Douglas