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

TUESDAY, AUGUST 25, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

ANOTHER WARM DAY WITH LOWERING HUMIDITY THIS AFTERNOON...

Today has been rather uneventful thus far with a lot of 
mid and high level clouds this morning clearing out to
mainly sunny skies by early this afternoon.

A thunderstorm did develop to the distant south-southeast 
of the Observatory early this afternoon, however no thunder
was observed here.

The wind has been gradually veering from the southwest to
the west. It has also been increasing with gusts now 
around 30 mph. The westerly winds are also helping to 
dry out the air mass as the dew point has dropped from the
upper 60s to the low 60s. 

The high so far today is 85F, 7 degrees above the
daily normal maximum of 78F. The low since midnight
is 70F, which is 9 degrees above the normal minimum
of 61F.


Today's Observations:

7 A.M.
Weather: Broken cirrostratus, thin broken cirrus, few altocumulus
and altocumulus castellanus WSW-WNW
Temperature: 72F; Dew Point: 69F; Relative Humidity: 90%
Wind: WSW at 8 kts
Sea-level pressure: 29.79 ins. Hg: falling, then rising
Visibility: 20 miles, hazy
6-hr Max temp: 72F
6-hr Min temp: 70F
24-hr Precip: 0.00 ins.
BHO SA 1155 E200 BKN 250 -BKN 20 089/72/69/2508/979/
FEW AC/ACC WSW-WNW HAZY/ 8/086 55005 10072 20070

10 A.M.
Weather: Scattered altocumulus/alto cumulus castellanus, 
broken cirrostratus, thin broken cirrus, few cumulus distant
WSW-NW, altocumulus standing lenticular WNW-N
Temperature: 80F; Dew Point: 65F; Relative Humidity: 65%
Wind: W at 10G17 kts
Sea-level pressure: 29.73 ins. Hg: falling, more slowly
Visibility: 25 miles, hazy
3-hr Precip: 0.00 ins.
BHO SA 1455 130 SCT E200 BKN 250 -BKN 25 069/80/65/2610G17/973/
FEW CU DSNT WSW-NW ACSL WNW-N HAZY/ 8/286 56020

1 P.M.
Weather: Clear, cumulonimbus distant SE-SSE moving E, few cumulus
all quadrants, few cirrostratus NE-SSE 
Temperature: 84F; Dew Point: 62F; Relative Humidity: 48%
Wind: W at 14G19 kts
Sea-level pressure: 29.69 ins. Hg: falling, then more rapidly
Visibility: 30 miles, hazy 
6-hr Max temp: 85F
6-hr Min temp: 72F
6-hr Precip: 0.00 ins. 
BHO SA 1755 CLR 30 054/84/62/2714G19/969/ CB DSNT SE-SSE MVG E
FEW CU ALQDS FEW CS NE-SSE HAZY/ 8/363 58015 10085 20072


SUMMARY FOR MONDAY, AUGUST 24, 2020 

TEMPERATURE (DEGREES F)
MAX.....87   NORMAL.....78
MIN.....67   NORMAL.....61
MEAN....77   NORMAL.....70

DEPARTURE FROM 30-YEAR NORMAL................. +7
TOTAL DEPARTURE FOR THE MONTH................+101 [+4.0 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY.................12  DEPARTURE.......+7                      
TOTAL COOLING UNITS FOR THE MONTH................248  DEPARTURE......+94
TOTAL COOLING UNITS FOR THE SEASON...............735  DEPARTURE.....+230
TOTAL COOLING UNITS LAST SEASON TO DATE..........597  DEPARTURE.....+138

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY....................18 S   AT  3:10 P.M.  
                   AERO.........................18 S   AT  3:29 P.M. 
                   ASOS.........................20 S   AT  3:10 P.M.
                   DAVIS........................N/A    AT  N/A
                   RMY 19  MERLIN 19
FASTEST MILE FOR YESTERDAY......................15 S   AT  3:19 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE...................15 S   AT  3:18 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE..................N/A    AT  N/A
AVERAGE WIND SPEED AND DIRECTION.............. 8.5 SW           
                   ASOS....................... 8.8
                   DAVIS...................... N/A

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE......-0.12
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........3.34  DEPARTURE......+0.10
                         ASOS..............3.36
TOTAL PRECIPITATION FOR THE YEAR..........32.41  DEPARTURE......-1.82
                         ASOS.............33.17


PRELIMINARY CLIMATE SUMMARY FOR AUGUST 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

08/01  87/66/77/+5/0.00/.../..             18 S    AERO 21 S    RMY 19
08/02  85/69/77/+5/0.02/.../..             36 S    AERO 37 S    RMY 38
08/03  91/75/83/+11/0.00/715/83            36 WSW  AERO 38 SW   RMY 36
08/04  83/71/77/5/0.21/094/11              67 SSE  AERO 71 S    RMY 70
08/05  90/68/79/+7/0.00/668/78             28 SW   AERO 30 SW   RMY 29
08/06  84/65/75/3/0.00/701/82              20 W    AERO 17 W    RMY 19
08/07  79/65/72/0/T/136/16                 16 NE   AERO 16 NE   RMY N/A
08/08  83/64/74/+2/0.00/612/72             20 S    AERO 20 S    RMY 19
08/09  90/65/78/+6/0.00/661/78             26 SSW  AERO 26 SSW  RMY 26
08/10  94/69/82/+11/0.00/727/86            22 W    AERO 20 W    RMY 20
08/11  92/72/82/+11/0.00/.../..            31 SSW  AERO 35 SSW  RMY 31  TSTM
08/12  93/74/84/+13/0.00/.../..            22 SSW  AERO 22 SW   RMY 19
08/13  88/71/80/+9/0.00/.../..             18 ENE  AERO 18 NE   RMY 18
08/14  82/67/75/+4/0.00/.../..             23 ENE  AERO 23 ENE RMY N/A
08/15  67/62/65/-6/T/.../..                33 NNE  AERO 32 NNE  RMY N/A
08/16  69/62/66/-5/..../.../..             26 ENE  AERO 28 ENE  RMY 26
08/17  73/59/66/-5/..../.../..             25 NE   AERO 24 NE   RMY N/A
08/18  84/63/74/+3/..../.../..             23 W    AERO 23 W    RMY 24
08/19  81/59/70/0/0.03/.../..              26 W    AERO 28 W    RMY 27
08/20  80/56/68/-2/0.00/.../..             22 W    AERO 21 W    RMY 22 
08/21  88/61/75/+5/0.00/.../..             28 SW   AERO 26 SW   RMY 28
08/22  85/66/76/+6/0.26/.../..             18 NNE  AERO 16 S    RMY 16
08/23  89/63/76/+6/2.21/.../..             60 WNW  AERO 53 WNW  RMY 58  TSTM HAIL
08/24  87/67/77/+7/0.00/.../..             18 S    AERO 18 S    RMY 19

08/25  The low since midnight is 70F, the daily normal low is 61F

DAILY RECORDS FOR AUGUST 2020

8/23/20: DAILY RECORD HIGH MAXIMUM TEMPERATURE OF 89F,
         BREAKS PREVIOUS RECORD of 88F SET IN 1918, 1947, 1949, 1996

8/23/20: DAILY RECORD PRECIPITATION OF 2.21 INS,
         BREAKS PREVIOUS RECORD OF 2.09 INS SET IN 2010

8/23/20: DAILY RECORD PEAK WIND GUST OF 60 MPH,
         TIES PREVIOUS RECORD OF 60 MPH SET IN 1940


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

RECORDS FOR AUGUST 25
HIGH 93F IN 1947, 1948, 2007 
LOW 41F IN 1940
PRECIP 2.69 INCHES IN 2010 
PEAK GUST 60e MPH SSW IN 1941

RECORDS FOR AUGUST 26
HIGH 96F IN 1900, 1948
LOW 46F IN 1885
PRECIP 5.85 INCHES IN 1924
PEAK GUST 55e MPH NNW IN 1947


TODAY'S REPORT PREPARED BY: Matt Douglas