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

TUESDAY, SEPTEMBER 29, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

WARM AND HUMID WEATHER CONTINUES WITH PASSING SHOWERS....

The warm and humid air mass continues over the region with
dew points in the low to mid 60s today. This moisture ladened
air is responsible for bringing a few showers through the
area the last couple of days. Yesterday we had a shower move 
through mid afternoon bringing with it 0.05" of much needed
rain, albeit not nearly enough for drought relief. Another
brief shower rolled through this afternoon just after the
1 P.M. observation dropping a paltry 0.01" of rain. Looking
forward to the prospects of more rain tonight and tomorrow,
we'll see how it pans out. 

Despite the little bit of rainfall, we are still under the 
influence of a severe drought, with some parts of the 
region in extreme drought. The rainfall total for the month
is up to 0.59", but this is still more than 3 inches below
normal. For the year to date, we are 5.39 below normal.

The high so far today is 76F, 9 degrees above the daily
normal max of 67F. The low since midnight is 62F, which
is 13 degrees above the normal low of 49F.


Today's Observations:

7 A.M.
Weather: Broken stratus fractus, broken altocumulus
Temperature: 64F; Dew Point: 62F; Relative Humidity: 93%
Wind: S at 8 kts 
Sea-level pressure: 29.96 ins. Hg: steady then rising
Visibility: 15 miles, thin fog all quadrants
6-hr Max temp: 64F
6-hr Min temp: 62F
24-hr Precip: 0.05 ins.
BHO SA 1155 E4 BKN 120 BKN 15 147/64/62/1908/996/ THN F ALQDS/
8/730 53003 70005 10064 20062

10 A.M.
Weather: Broken altocumulus/altocumulus castellanus, 
broken cirrostratus/cirrus, few stratocumulus all quadrants
Temperature: 73F; Dew Point: 64F; Relative Humidity: 74%
Wind: S at 7 kts
Sea-level pressure: 29.97 ins. Hg: rising then falling
Visibility: 40 miles, hazy
3-hr Precip: 0.00 ins.
BHO SA 1455 E100 BKN 250 BKN 40 150/73/64/1807/997/ FEW SC ALQDS
HAZY/ 8/588 50003

1 P.M.
Weather: Broken altocumulus, broken altocumulus/castellanus, 
thin broken cirrus, few cumulus/stratocumulus all quadrants 
Temperature: 75F; Dew Point: 62F; Relative Humidity: 65%
Wind: SSW at 11G16 kts
Sea-level pressure: 29.90 ins. Hg: falling, then more rapidly
Visibility: 50 miles 
6-hr Max temp: 76F
6-hr Min temp: 64F
6-hr Precip: 0.00 ins.
BHO SA 1755 E90 BKN 120 BKN 250 -BKN 50 126/75/62/2011G16/990/
FEW CU/SC ALQDS RWS S-W MVG N VIRGA E-SE/ 8/881 58024 10076 20064


SUMMARY FOR MONDAY, SEPTEMBER 28, 2020 

TEMPERATURE (DEGREES F)
MAX.....78   NORMAL.....67
MIN.....64   NORMAL.....50
MEAN....71   NORMAL.....58

DEPARTURE FROM 30-YEAR NORMAL................+13
TOTAL DEPARTURE FOR THE MONTH................+16 [+0.4 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY............. 0  DEPARTURE..... -7
TOTAL HEATING UNITS FOR THE MONTH.............94  DEPARTURE..... -7
TOTAL HEATING UNITS FOR THE SEASON............97  DEPARTURE.....-29
TOTAL HEATING UNITS LAST SEASON TO DATE.......83  DEPARTURE.....+14

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY............. 6  DEPARTURE..... +5                   
TOTAL COOLING UNITS FOR THE MONTH............ 69  DEPARTURE.....+10
TOTAL COOLING UNITS FOR THE SEASON...........826  DEPARTURE....+230
TOTAL COOLING UNITS LAST SEASON TO DATE......680  DEPARTURE....+146

PEAK WIND GUST FOR YESTERDAY (MPH) 
                   420C/Official................24 SSE AT 12:45 A.M.  
                   AERO.........................24 S   AT 11:37 A.M. 
                   ASOS.........................24 S   AT 10:05 A.M.
                   DAVIS........................26 SSE AT 12:39 A.M.
                   RMY 25  MERLIN 25
FASTEST MILE FOR YESTERDAY......................18 SSE AT 12:48 A.M. 
MAXIMUM 2-MINUTE ASOS AVERAGE...................17 S   AT  1:12 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE..................18 SSE AT 12:47 A.M.
AVERAGE WIND SPEED AND DIRECTION..............12.0 S (288 total miles)        
                   ASOS.......................12.3
                   DAVIS......................11.3 S [188 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.05  DEPARTURE....-0.10
                         ASOS..............0.04
TOTAL PRECIPITATION FOR THE MONTH..........0.59  DEPARTURE....-3.18
                         ASOS..............0.56
TOTAL PRECIPITATION FOR THE YEAR..........33.40  DEPARTURE....-5.39
                         ASOS.............34.14

PRELIMINARY CLIMATE SUMMARY FOR SEPTEMBER 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

09/01  76/59/68/0/0.00/698/88              22 SSE  AERO 21 SE   RMY 20
09/02  69/59/64/-4/0.18/102/13             23 SSE  AERO 23 SSE  RMY 24
09/03  75/66/71/+4/0.04/000/00             22 SSW  AERO 21 SSW  RMY N/A
09/04  82/62/72/+5/0.00/763/98             26 WNW  AERO 26 WNW  RMY 25
09/05  76/55/66/-1/0.00/760/98             25 W    AERO 25 W    RMY 24
09/06  78/58/68/+1/0.00/356/46             24 W    AERO 24 W    RMY N/A
09/07  79/61/70/+4/0.00/632/82             27 SSE  AERO 30 SSE  RMY 28
09/08  82/61/72/+6/0.00/545/71             17 S    AERO 16 S    RMY 17
09/09  80/62/71/+5/0.00/214/28             16 S    AERO 15 S    RMY 16
09/10  81/69/75/+10/0.28/015/02            21 SSW  AERO 21 SSW  RMY N/A
09/11  72/55/64/-1/0.01/152/20             25 N    AERO 25 N    RMY N/A
09/12  68/51/60/-5/0.00/666/88             21 ENE  AERO 21 ENE  RMY 21
09/13  74/53/64/0/0.00/611/81              26 SSW  AERO 26 SSW  RMY 26
09/14  74/50/62/-2/0.00/511/68             29 NNW  AERO 33 NNW  RMY 30
09/15  64/44/54/-10/0.00/583/78            18 S    AERO 18 S    RMY N/A
09/16  72/49/61/-2/0.00/603/81             31 SSW  AERO 31 SSW  RMY 31
09/17  76/57/67/+4/0.00/453/61             26 WSW  AERO 28 W    RMY N/A
09/18  64/48/56/-6/0.00/163/22             28 NE   AERO 30 NNW  RMY N/A
09/19  59/42/51/-11/0.00/722/98            23 N    AERO 23 N    RMY N/A
09/20  58/40/49/-13/0.00/602/82            25 NE   AERO 25 NE   RMY 27
09/21  61/41/51/-10/0.00/.../..            29 NE   AERO 27 NE   RMY 29
09/22  63/39/51/-10/0.00/.../..            28 NNW  AERO 30 NNW  RMY 29
09/23  78/50/64/+4/0.00/.../..             31 NW   AERO 32 WNW  RMY 32
09/24  76/57/67/+7/0.00/.../..             20 SW   AERO 18 WSW  RMY 19
09/25  77/57/67/+7/0.00/.../..             18 ENE  AERO 18 WSW  RMY N/A
09/26  77/57/67/+8/0.00/.../..             21 S    AERO 21 S    RMY 21
09/27  79/64/72/+13/0.01/.../..            24 S    AERO 25 S    RMY 24
09/28  78/64/71/+13/0.07/.../..            24 SSE  AERO 24 S    RMY 25 

09/29 The low since midnight is 62F, the daily normal low is 49F


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

RECORDS FOR SEPTEMBER 29
HIGH 85F IN 1952
LOW 28F IN 1914 (SEPTEMBER MINIMUM RECORD)
PRECIP 2.61 INCHES IN 1907
PEAK GUST 62 MPH S IN 2005

RECORDS FOR SEPTEMBER 30
HIGH 84F IN 1986
LOW 31F IN 1992
PRECIP 2.44 INCHES IN 2015
PEAK GUST 58 MPH SSE IN 1999

TODAY'S REPORT PREPARED BY: Matt Douglas