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

SATURDAY, JULY 25, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

WARM AND A BIT LESS HUMID UNDER A MIX OF SUN AND CLOUDS...

Not much to talk about today as it's been a very 
quiet day. A mix of sun and clouds have been the theme
most of the day. Winds have been very light, even going
calm for time this morning. 

The humidity did drop off a bit today with the dew point
going from the upper 60s this morning to the low 60s by
early this afternoon.
 
The high so far today is 88 degrees. This is 7 degrees
above the daily normal high of 81F. The low since 
midnight is 67F, which is 4 degrees above the daily
normal low of 63F

Today's Observations:

7 A.M.
Weather: Thin broken cirrus, few altocumulus/altocumulus
castellanus distat SW-NW
Temperature: 73F; Dew Point: 67F; Relative Humidity: 82%
Wind: WNW at 6 kts, wind light
Sea-level pressure: 30.10 ins. Hg: falling, then rising
Visibility: 25 miles, hazy
6-hr Max temp: 73F
6-hr Min temp: 67F
24-hr Precip: 0.00 ins.
BHO SA 1155 250 –SCT 25 193/73/67/2906/010/ FEW AC/ACC
DSNT SW-NW HAZY WND LGT/ 8/081 53005 10073 20067

10 A.M.
Weather: Scattered cumulus, scattered altocumulus, 
thin broken cirrus, moderate cumulus distant W-NW
Temperature: 81F; Dew Point: 62F; Relative Humidity: 53%
Wind: Calm
Sea-level pressure: 30.10 ins. Hg: rising then falling
Visibility: 40 miles, hazy
3-hr Precip: 0.00 ins.
BHO SA 1455 30 SCT 80 SCT 250 –BKN 40 193/81/62/0000/010/
MDT CU DSNT W-NW HAZY WND CALM/ 8/271 55000

1 P.M.
Weather: Scattered cumulus, thin broken cirrus
Temperature: 86F; Dew Point: 60F; Relative Humidity: 42%
Wind: W at 5 kts, wind light
Sea-level pressure: 30.07 ins. Hg: falling, then more rapidly
Visibility: 40 miles, hazy
6-hr Max temp: 88F
6-hr Min temp: 73F
6-hr Precip: 0.00 ins.
BHO SA 1755 60 SCT 250 –BKN 40 182/86/60/2805/007/ HAZY WND LGT/
8/201 58011 10088 20073


SUMMARY FOR FRIDAY, JULY 24, 2020 

TEMPERATURE (DEGREES F)
MAX.....81   NORMAL.....81
MIN.....68   NORMAL.....63
MEAN....75   NORMAL.....72

DEPARTURE FROM 30-YEAR NORMAL................. +3
TOTAL DEPARTURE FOR THE MONTH.................+46 [+1.7 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY.................10  DEPARTURE....... +2
TOTAL COOLING UNITS FOR THE MONTH................196  DEPARTURE.......+27
TOTAL COOLING UNITS FOR THE SEASON...............380  DEPARTURE.......+82
TOTAL COOLING UNITS LAST SEASON TO DATE..........330  DEPARTURE.......+50

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY....................15 ENE AT 10:46 A.M.  
                   AERO.........................15 ENE AT  9:58 A.M. 
                   ASOS.........................17 ENE AT 10:44 A.M.
                   DAVIS........................18 ENE AT 10:05 A.M
                   RMY 16 MERLIN 16
FASTEST MILE FOR YESTERDAY......................13 ENE AT 10:07 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE...................14 ENE AT 10:44 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE..................14 E   AT 10:44 A.M.
AVERAGE WIND SPEED AND DIRECTION...............7.1 NNW            
                   ASOS........................7.6
                   DAVIS.......................7.5 NE [036 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE......-0.14
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........1.71  DEPARTURE......-1.29
                         ASOS..............1.79
TOTAL PRECIPITATION FOR THE YEAR..........29.06  DEPARTURE......-0.91
                         ASOS.............29.80



PRELIMINARY CLIMATE SUMMARY FOR JULY 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

07/01  76/63/70/0/0.00/228/25              16 E    AERO 14 E    RMY 14  TSTM
07/02  86/61/74/4/0.00/803/88              30 WSW  AERO 25 WSW  RMY 33
07/03  73/60/67/-4/0.00/091/10             30 NE   AERO 28 NE   RMY 30
07/04  79/60/70/-1/0.00/565/62             16 S    AERO 16 S    RMY 16
07/05  83/63/73/+2/0.54/373/41             24 NW   AERO 30 NW   RMY 26  TSTM
07/06  73/60/67/-4/0.00/482/53             20 ENE  AERO 16 NNE  RMY 18
07/07  78/60/69/-2/0.00/454/50             25 S    AERO 25 S    RMY 26
07/08  83/64/74/+2/0.00/227/25             32 SSW  AERO 32 SSW  RMY 32
07/09  89/70/80/+8/0.00/834/92             24 S    AERO 23 S    RMY 22 
07/10  83/70/77/+5/0.05/109/12             30 SSE  AERO 32 SSE  RMY N/A
07/11  85/70/78/+6/0.00/614/68             39 S    AERO 39 S    RMY 38
07/12  86/70/78/+6/0.00/830/92             28 WSW  AERO 28 WSW  RMY 29
07/13  82/69/76/+4/0.23/306/34             30 SSE  AERO 31 SSE  RMY 30  TSTM
07/14  78/63/71/-1/0.00/369/41             26 ENE  AERO 25 ENE  RMY 26  
07/15  72/59/66/-6/0.00/539/60             21 NE   AERO 21 NE   RMY N/A
07/16  73/57/65/-7/0.00/815/91             21 E    AERO 21 E    RMY 19
07/17  71/57/64/-8/0.19/027/03             24 SSW  AERO 24 SSW  RMY 25 
07/18  89/66/78/+6/0.00/822/92             18 W    AERO 17 W    RMY 19
07/19  92/69/81/+9/0.00/.../..             28 S    AERO 28 S    RMY 26
07/20  91/72/82/+10/T/.../..               25 SSW  AERO 25 SSW  RMY N/A
07/21  88/68/78/+6/0.00/.../..             25 W    AERO 25 W    RMY 24
07/22  80/67/74/+2/..../.../..             16 ENE  AERO M  M    RMY 16
07/23  88/68/78/+6/0.48/.../..             31 N    AERO 32 N    RMY 31
07/24  81/68/75/+3/0.00/.../..             15 ENE  AERO 15 ENE  RMY 16

07/25 The low since midnight is 67F, the daily normal low is 63F

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

RECORDS FOR JULY 25
HIGH 96F IN 2016
LOW 51F IN 1901,1953
PRECIP 2.25 INS IN 1990
PEAK GUST 88 MPH NW IN 1972

RECORDS FOR JULY 26
HIGH 97F IN 1963
LOW 47F IN 1920
PRE 2.05 INS IN 1899
WIND 74e MPH NNW IN 1940

TODAY'S REPORT PREPARED BY: Matt Douglas