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

MONDAY, AUGUST 24, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

WARM AND HUMID WEATHER CONTINUES...

After yesterday's exciting weather conditions on
Blue Hill, from the complete undercast in the 
morning to the severe thunderstorm that brought
a strong wind gust, hail, and torrential rainfall
in the late afternoon/early evening, today so far
has been quite tranquil!

To recap the events of yesterday, the severe storm
brought a wind gust to 60 mph from the WNW at 4:46 P.M.,
estimated penny sized (0.50" diameter) hail, and
heavy rainfall totaling 2.21 inches.

We also broke or tied a few records yesterday;

First we set a new record high temperature for the day
of 89 degrees. The previous record was 88 degrees set
in 1918, 1947, 1949, and 1996.

We broke the rainfall record for the date with 2.21".
The previous record was 2.09" set back in 2010.

Lastly we tied the peak wind gust record for the date
with 60 mph, which also occurred back in 1940!

Today so far has been very quiet with varying amounts
of cloud cover mixed with sun. Humidity levels has been
quite high with dew points hanging around in the upper
60s and low 70s, making it feel pretty uncomfortable
outside.

The wind has been very light most of the day, only 
averaging around 6 mph since 7 A.M. The peak gust
so far has only been around 17 mph. 

The high so far today is 86F, 8 degrees above the
daily normal maximum of 78F. The low since midnight
is 67F, which is 6 degrees above the normal minimum
of 61F.


Today's Observations:

7 A.M.
Weather: Broken stratus fractus, broken altocumulus,
thin broken cirrus
Temperature: 70F; Dew Point: 68F; Relative Humidity: 94%
Wind: WSW at 7 kts
Sea-level pressure: 30.03 ins. Hg: rising, then falling
Visibility: 4 miles, fog, 6 miles N, 10 miles NE
6-hr Max temp: 70F
6-hr Min temp: 67F
24-hr Precip: 2.21 ins.
BHO SA 1155 E1 BKN 150 BKN 250 -BKN 4F 169/70/68/2407/003/
VSBY N 6 NE 10/ 8/631 50000 70221 10070 20067

10 A.M.
Weather: Broken altocumulus/alto cumulus castellanus,
few stratus fractus E-S, few moderate cumulus distant SW and
distant W-WNW
Temperature: 78F; Dew Point: 72F; Relative Humidity: 82%
Wind: SW at 6 kts, wind light
Sea-level pressure: 30.03 ins. Hg: steady, then falling
Visibility: 25 miles, hazy
3-hr Precip: 0.00 ins.
BHO SA 1455 E110 BKN 25 168/78/72/2306/003/ FEW STFRA E-S
FEW MDT CU DSNT SW AND DSNT W-WNW HAZY WND LGT/ 8/680 58001

1 P.M.
Weather: Scattered cumulus, broken altocumulus, broken 
dense cirrus, thin broken cirrus, cumulonimbus distant S
moving E, altocumulus standing lenticular distant NW-N 
Temperature: 85F; Dew Point: 69F; Relative Humidity: 59%
Wind: SW at 5 kts, wind light
Sea-level pressure: 29.98 ins. Hg: falling, then more rapidly
Visibility: 35 miles, hazy 
6-hr Max temp: 86F
6-hr Min temp: 70F
6-hr Precip: 0.00 ins. 
BHO SA 1755 40 SCT E110 BKN 180 BKN 250 -BKN 35 154/85/69/2305/998/
CB DSNT S MVG E ACSL DSNT NW-N OCCL LTGICCCCG DSNT S HAZY WND LGT/
8/943 58014 10086 20070


SUMMARY FOR SUNDAY, AUGUST 23, 2020 

TEMPERATURE (DEGREES F)
MAX.....89   NORMAL.....78
MIN.....63   NORMAL.....61
MEAN....76   NORMAL.....70

DEPARTURE FROM 30-YEAR NORMAL................. +6
TOTAL DEPARTURE FOR THE MONTH.................+94 [+3.9 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY.................11  DEPARTURE.......+6                      
TOTAL COOLING UNITS FOR THE MONTH................236  DEPARTURE......+87
TOTAL COOLING UNITS FOR THE SEASON...............723  DEPARTURE.....+223
TOTAL COOLING UNITS LAST SEASON TO DATE..........597  DEPARTURE.....+126

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY....................60 WNW AT  4:46 P.M. (TSTM)  
                   AERO.........................53 WNW AT  4:46 P.M. 
                   ASOS.........................56 WNW AT  4:46 P.M.
                   DAVIS........................60 WNW AT  4:46 P.M
                   RMY 58  MERLIN 61
FASTEST MILE FOR YESTERDAY......................35 WNW AT  4:42 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE...................30 WNW AT  4:47 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE..................35 WNW AT  4:47 P.M.
AVERAGE WIND SPEED AND DIRECTION.............. 8.9 S           
                   ASOS....................... 8.7
                   DAVIS...................... N/A

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....2.21  DEPARTURE......+2.09
                         ASOS..............2.25
TOTAL PRECIPITATION FOR THE MONTH..........3.34  DEPARTURE......+0.22
                         ASOS..............3.36
TOTAL PRECIPITATION FOR THE YEAR..........32.41  DEPARTURE......-1.70
                         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/.../..            36 WSW  AERO 38 SW   RMY 36
08/04  83/71/77/5/0.21/.../..              67 SSE  AERO 71 S    RMY 70
08/05  90/68/79/+7/0.00/.../..             28 SW   AERO 30 SW   RMY 29
08/06  84/65/75/3/0.00/.../..              20 W    AERO 17 W    RMY 19
08/07  79/65/72/0/T/.../..                 16 NE   AERO 16 NE   RMY N/A
08/08  83/64/74/+2/0.00/.../..             20 S    AERO 20 S    RMY 19
08/09  90/65/78/+6/0.00/.../..             26 SSW  AERO 26 SSW  RMY 26
08/10  94/69/82/+11/0.00/.../..            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  The low since midnight is 67F, 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 24
HIGH 92F IN 1947
LOW 43F IN 1971
PRECIP 2.40 INCHES IN 2010 
PEAK GUST 54 MPH W IN 1986

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

TODAY'S REPORT PREPARED BY: Matt Douglas