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

DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, OCTOBER 3, 2018 
ALL TIMES ARE IN EASTERN STANDARD TIME

LIGHT WINDS WITH DECREASING FOG IN THE AFTERNOON....

Fog persisted throughout the morning and finally clearing just before
the 1 P.M. observation.  The clearing enabled a visibility of 
20 miles, a notable improvement from the 1/16 mile recorded during
the morning observations.  Winds remained light throughout the day, 
with gentle northwesterly flow interspersed with calm moments.  This 
is proved by our 10 A.M. observation, where a speed of 0 mph was 
recorded.  Temperatures rose to 58F so far today, 7 degrees below 
the daily average of 65F.  We recorded 0.88 inches of precipitation
this morning, evidence of last night's heavy rain storms.    


Today's Observations:

7 A.M.
Weather: Fog 
Temperature: 55F; Dew Point: 55F; Wind: N at 3 kts,
Wind: Light  
Sea-level pressure: 30.00 ins. Hg, increasing steadily       
Visibility: 1/16 mile, fog
6-hr Max temp: 64F
6-hr Min temp: 52F
24-hr Precip: 0.88 ins.   
BHO SA 1155 W3 X 1/16F 159/52/52/3603/000/ WND LGT/ 
8//// 70088 52013 10064 20052 

10 A.M.
Weather: Fog 
Temperature: 54F; Dew Point: 54F; Wind: 0,
Wind: Calm  
Sea-level pressure: 30.05 ins. Hg, increasing slowly
Visibility: 1/16 mile, fog 
3-hr Precip: 0.01 ins.
BHO SA 1455 W3 X 1/16F 175/54/54/0000/005/ WND CALM/ 8//// 6001/ 51016

1 P.M.
Weather: Overcast stratus
Temperature: 59F; Dew Point: 58F; Wind: NW at 4 kts,
Wind: Light & Variable
Sea-level pressure: 30.03 ins. Hg, falling slowly     
Visibility: 20 miles, distant fog, except 10 miles N-W 
6-hr Max temp: 59F
6-hr Min temp: 52F 
6-hr Precip: 0.01 ins.
BHO SA 1755 E22 OVC 20 171/59/58/3104/003/ DSNT FG ALQDS VSBY N-W 10 WND L/V/ 
8/6// 6001/ 58004 10059 20052
  
SUMMARY FOR MONDAY, OCTOBER 1, 2018 

TEMPERATURE (DEGREES F)
MAX.....64   NORMAL.....65
MIN.....53   NORMAL.....48
MEAN....59   NORMAL.....57

DEPARTURE FROM 30-YEAR NORMAL.......................+2
TOTAL DEPARTURE FOR THE MONTH........................4 [+1.8 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY...............6   DEPARTURE.........-3
TOTAL HEATING UNITS FOR THE MONTH..............12   DEPARTURE.........-5
TOTAL HEATING UNITS FOR THE SEASON.............99   DEPARTURE........-60
TOTAL HEATING UNITS LAST SEASON TO DATE.......113   DIFFERENCE.......-14

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY...............0  DEPARTURE..........-1
TOTAL COOLING UNITS FOR THE MONTH...............0  DEPARTURE..........-1
TOTAL COOLING UNITS FOR THE SEASON............863  DEPARTURE........+266
TOTAL COOLING UNITS LAST SEASON TO DATE.......707  DIFFERENCE.......+156

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY....................33 S   AT 6:42  P.M.
                   AERO.........................32 S   AT 6:51  P.M.
                   ASOS.........................35 S   AT 6:42  P.M.
                   DAVIS........................37 S   AT 6:42  P.M. RMY 35
FASTEST MILE FOR YESTERDAY......................26 S   AT 6:15  P.M. 
MAXIMUM 2-MINUTE ASOS AVERAGE...................24 S   AT 6:34  P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE..................24 SSE AT 6:07  P.M.
AVERAGE WIND SPEED AND DIRECTION...............8.0 ENE
                   ASOS........................8.3
                   DAVIS.......................8.4 ESE [117 deg.]   

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.88  DEPARTURE......+0.73
                         ASOS..............0.90
TOTAL PRECIPITATION FOR THE MONTH..........1.31  DEPARTURE......+1.00
                         ASOS..............1.33 
TOTAL PRECIPITATION FOR THE YEAR..........48.39  DEPARTURE......+9.18
                         ASOS.............50.25 

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

9/01 75/58/67/-1/0.00/521/66        17 NE  AERO 15 NE  RMY 16 
9/02 83/61/72/+4/0.00/684/87        20 SSW AERO 18 SSW RMY N/A 
9/03 92/68/80/+13/0.00/650/83       24 WSW AERO 22 WSW RMY 25
9/04 88/70/79/+12/0.00/695/89       17 W   AERO 16 W   RMY 17 
9/05 89/67/78/+11/0.00/638/82       23 SSW AERO 23 SSW RMY 25 
9/06 92/70/81/+14/0.56/488/63       29 NNW AERO 29 NNW RMY N/A TSTM
9/07 70/63/67/+1/0.01/000/00        24 NE  AERO 22 NE  RMY N/A 
9/08 68/54/61/-5/0.00/031/04        22 NE  AERO 18 NE  RMY 21
9/09 61/53/57/-9/0.00/000/00        23 NE  AERO 21 NE  RMY N/A
9/10 62/56/59/-6/..../000/00        30 E   AERO 28 E   RMY 28
9/11 75/61/68/+3/..../000/00        23 E   AERO 21 E   RMY N/A TSTM 
9/12 69/63/66/+1/..../000/00        21 ENE AERO 21 ENE RMY 21  TSTM 
9/13 68/62/65/+1/..../091/12        21 NE  AERO 21 NE  RMY N/A TSTM 
9/14 75/61/68/+4/..../233/31        13 NE  AERO 12 ENE RMY 12 
9/15 76/62/69/+5/0.01/218/29        14 SW  AERO 13 SW  RMY 13
9/16 84/61/73/+10/..../695/93       15 S   AERO 14 S   RMY N/A
9/17 82/64/73/+10/..../372/50       22 SSW AERO 22 SSW RMY N/A
9/18 74/67/71/+9/..../000/00        31 SSW AERO 30 SSW RMY N/A TSTM
9/19 66/57/62/0/..../007/01         28 NE  AERO 25 NE  RMY 26
9/20 63/55/59/-3/..../.../..        22 NE  AERO 21 NE  RMY 19
9/21 70/55/63/+2/..../.../..        37 SSW AERO 37 SSW RMY 41
9/22 70/51/61/0/..../.../..         37 SW  AERO 36 SW  RMY 30
9/23 60/47/54/-6/..../.../..        14 N   AERO 13 N   RMY N/A 
9/24 55/50/53/-7/..../.../..        37 ENE AERO 35 ENE RMY 35
9/25 68/51/60/0/..../.../..         36 SE  AERO 37 SE  RMY 38
9/26 79/66/73/+14/..../.../..       35 SSW AERO 37 SSW RMY 37
9/27 66/56/61/+2/..../.../..        26 NNE AERO 25 NNE RMY 28
9/28 56/52/54/-4/..../.../..        24 NNE AERO 21 NNE RMY 23
9/29 71/50/61/+3/..../.../..        20 NW  AERO 18 NW  RMY 20
9/30 68/48/58/0/..../.../..         20 W   AERO 16 W   RMY N/A

DAILY RECORDS FOR SEPTEMBER

09/04/18: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 70F,
          BREAKS PREVIOUS RECORD OF 68F SET IN 1937 AND 1959

09/06/18: DAILY RECORD HIGH MAXIMUM TEMPERATURE OF 92F,
          TIES PREVIOUS RECORD OF 92F SET IN 1900 


PRELIMINARY CLIMATE SUMMARY FOR OCTOBER 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

10/1 65/53/59/+2/..../.../..         21 ENE AERO 18 SSW RMY N/A
10/2 64/53/59/+2/..../.../..         33 S   AERO 32 S   RMY 35 TSTM
10/3 Low temp since midnight is 52F; normal low is now 48F

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

RECORDS FOR OCTOBER 3
HIGH 82F IN 1922
LOW 28F IN 1899
PRECIP 1.76 INCHES IN 1979
PEAK GUST 62 MPH WNW IN 1964

RECORDS FOR OCTOBER 4
HIGH 84F IN 2007 
LOW 28F IN 1888
PRECIP 1.87 INCHES IN 2011
PEAK GUST 59 MPH SSW IN 1990

TODAY'S REPORT PREPARED BY: Nate Iannuccillo & Benjamin Turner