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

WEDNESDAY, JULY 22, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

MOSTLY CLOUDY CONDITIONS WITH SOME
RAINFALL IN THE MORNING....

Today, again, felt on the cooler side in 
comparison with days prior, with 
temperatures staying in the mid 70s. Wind 
was northeasterly at an average of 10 mph, 
providing a slightly cooler breeze off the 
ocean. Visibility reached almost 40 miles 
by the 10 A.M. observation, but has stayed 
limited due to haze. Conditions were mostly 
cloudy, with a quick rain shower between 
8 A.M. and 9 A.M. This left 0.07 inches 
in the rain gauge, the first measurable
amount of precipitation in a few days.    

The high so far today is 77 degrees. 
This is 4 degrees below the daily 
normal high of 81F. The low since 
midnight is 69F, which is 6 degrees
above the daily normal low of 63F.


Today's Observations:

7 A.M.
Weather: Overcast stratocumulus
Temperature: 69F; Dew Point: 63F; Relative Humidity: 83%
Wind: NE at 10 kts 
Sea-level pressure: 30.07 ins. Hg: rising then falling
Visibility: 15 miles, hazy
6-hr Max temp: 73F
6-hr Min temp: 69F
24-hr Precip: 0.00 ins.
BHO SA 1155 50 OVC 15 183/69/63/0410/007/ HAZY/ 8/8// 
50005 10073 20069

10 A.M.
Weather: Overcast stratocumulus
Temperature: 70F; Dew Point: 68F; Relative Humidity: 94%
Wind: NE at 7 kts
Sea-level pressure: 30.10 ins. Hg: falling then rising
Visibility: 40 miles
3-hr Precip: 0.07 ins.
BHO SA 1455 50 OVC 40 192/70/68/0407/010/ 8/8// 6007/ 51009

1 P.M.
Weather: Scattered cumulus and broken altocumulus
Temperature: 77F; Dew Point: 67F; Relative Humidity: 73%
Wind: ENE at 3 kts, light and variable
Sea-level pressure: 30.08 ins. Hg: falling, then more slowly
Visibility: 35 miles, Hazy
6-hr Max temp: 77F
6-hr Min temp: 67F
6-hr Precip: 0.07 ins.
BHO SA 1755 40 SCT 110 BKN 35 185/77/67/0703/008/ HAZY WND 
L/V/ 8/208 6007/ 58007 10077 20067


SUMMARY FOR TUESDAY, JULY 21, 2020 

TEMPERATURE (DEGREES F)
MAX.....88   NORMAL.....81
MIN.....68   NORMAL.....63
MEAN....78   NORMAL.....72

DEPARTURE FROM 30-YEAR NORMAL................. +6
TOTAL DEPARTURE FOR THE MONTH................. +35 [+1.5 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY.................13  DEPARTURE.......+6
TOTAL COOLING UNITS FOR THE MONTH................164  DEPARTURE.......+19
TOTAL COOLING UNITS FOR THE SEASON...............348  DEPARTURE.......+74
TOTAL COOLING UNITS LAST SEASON TO DATE..........318  DEPARTURE.......+30

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY....................25 W   AT 12:44- P.M.  
                   AERO.........................25 W   AT 12:07 P.M.  
                   ASOS.........................25 W   AT 12:44 P.M.
                   DAVIS........................26 W   AT 12:43 P.M RMY 24
FASTEST MILE FOR YESTERDAY......................19 W   AT 12:30 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE...................18 W   AT 12:46 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE..................19 W   AT 12:28 P.M.
AVERAGE WIND SPEED AND DIRECTION...............9.5 WNW            
                   ASOS........................9.5
                   DAVIS......................10.0 WNW [288 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE......-0.13
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........1.06  DEPARTURE......-1.53
                         ASOS..............1.06
TOTAL PRECIPITATION FOR THE YEAR..........28.41  DEPARTURE......-1.15
                         ASOS.............29.07


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/.../..             20 ENE  AERO 16 NNE  RMY 18
07/07  78/60/69/-2/0.00/.../..             25 S    AERO 25 S    RMY 26
07/08  83/64/74/+2/0.00/.../..             32 SSW  AERO 32 SSW  RMY 32
07/09  89/70/80/+8/0.00/.../.              24 S    AERO 23 S    RMY 22 
07/10  83/70/77/+5/0.05/.../..             30 SSE  AERO 32 SSE  RMY N/A
07/11  85/70/78/+6/0.00/.../..             39 S    AERO 39 S    RMY 38
07/12  86/70/78/+6/0.00/.../..             28 WSW  AERO 28 WSW  RMY 29
07/13  82/69/76/+4/0.23/.../..             30 SSE  AERO 31 SSE  RMY 30  TSTM
07/14  78/63/71/-1/0.00/.../..             26 ENE  AERO 25 ENE  RMY 26  
07/15  72/59/66/-6/0.00/.../..             21 NE   AERO 21 NE   RMY N/A
07/16  73/57/65/-7/0.00/.../..             21 E    AERO 21 E    RMY 19
07/17  71/57/64/-8/0.19/.../..             24 SSW  AERO 24 SSW  RMY 25 
07/18  89/66/78/+6/0.00/.../..             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 The low since midnight is 69F, 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 22
HIGH 99F IN 1926, 2011
LOW 52F IN 1890
PRECIP 1.73 INS IN 1900 
PEAK GUST 55 MPH IN 1983

RECORDS FOR JULY 23
HIGH 99F IN 1952
LOW 51F IN 1923,1977
PRECIP 1.82 INS IN 1953
PEAK GUST 54e MPH S IN 1946

TODAY'S REPORT PREPARED BY: Benjamin Turner