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

DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, JANUARY 30, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

A FAIR WEATHER DAY AMONGST PERSISTENT HIGH PRESSURE....

Today we observed almost clear skies, being overtaken
by a very thin cirrostratus layer around noontime. 
Visibility has been great throughout the day, being 
80 miles on average. Wind is northerly at less than 
10 mph, gusting to less than 15 mph.

We continue to expand our rain and snowfall deficits for the 
month. The rainfall total is 1.46 inches, 2.62 inches below
the average rain total. Snowfall for this month is considerably
low, amounting to only 4.2 inches. That is 11.9 inches below
the normal monthly snowfall total. 

The high so far today is 31F, 3 degrees below the normal high
of 34F. The low since midnight is 16F, a degree below the
normal low of 17F.


Today's Observations:

7 A.M.
Weather: Few distant stratocumulus offshore
Temperature: 16F; Dew Point: 7F; Wind: NNW at 8 kts
Sea-level pressure: 30.29 ins. Hg, rising steadily
Visibility: 75 miles
6-hr Max temp: 22F
6-hr Min temp: 16F
24-hr Precip:  0.00 ins.
24-hr Snowfall: 0.0 ins. 
BHO SA 1155 CLR 75 257/16/7/3308/029/ 8/400 53017 10022 20016

10 A.M.
Weather: Scattered cirrus, few stratocumulus offshore
Temperature: 26F; Dew Point: 10F; Wind: N at 3 kts,
Wind: Light and variable
Sea-level pressure: 30.34 ins. Hg, rising, then more slowly
Visibility: 80 miles
3-hr Precip:   0.00 ins.
3-hr Snowfall:  0.0 ins.
BHO SA 1455 250 SCT 80 271/26/10/0103/034/ WND L/V FEW SC/CU 
OFFSHR/ 8/802 51014

1 P.M.
Weather: Broken cirrostratus, few distant stratocumulus 
offshore 
Temperature: 31F; Dew Point: 5F; Wind: N at 7 kts
Sea-level pressure: 30.33 ins. Hg, rising, then falling
Visibility: 80 miles
6-hr Max temp: 31F
6-hr Min temp: 16F
6-hr Precip:  0.00 ins.
6-hr Snowfall: 0.0 ins.
BHO SA 1755 E250 BKN 80 270/31/5/3607/033/ FEW SC/CU OFFSHR/ 
8/808 58001 10031 20016    


SUMMARY FOR WEDNESDAY, JANUARY 29, 2020 

TEMPERATURE (DEGREES F)
MAX.....38   NORMAL.....34
MIN.....23   NORMAL.....17
MEAN....31   NORMAL.....25

DEPARTURE FROM 30-YEAR NORMAL.....................+6
TOTAL DEPARTURE FOR THE MONTH....................+242 [+8.1 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY...............34  DEPARTURE........-6
TOTAL HEATING UNITS FOR THE MONTH..............907  DEPARTURE......-240
TOTAL HEATING UNITS FOR THE SEASON............3158  DEPARTURE......-294
TOTAL HEATING UNITS LAST SEASON TO DATE.......3391  DEPARTURE......-233

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY....................24 N   AT  3:37 P.M.  
                   AERO.........................23 N   AT  3:34 P.M.   
                   ASOS.........................24 NW  AT  5:56 A.M. 
                   DAVIS........................25 NW  AT  5:55 A.M. RMY 24
FASTEST MILE FOR YESTERDAY......................17 N   AT  3:40 P.M. 
MAXIMUM 2-MINUTE ASOS AVERAGE...................17 NW  AT  3:45 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE..................18 NW  AT  3:44 P.M.
AVERAGE WIND SPEED AND DIRECTION..............10.2 NW                 
                   ASOS.......................10.7 
                   DAVIS......................10.5 NW [323 deg.]


PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE......-0.14
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........1.46  DEPARTURE......-2.62
                         ASOS..............1.54
TOTAL PRECIPITATION FOR THE YEAR...........1.46  DEPARTURE......-2.62
                         ASOS..............1.54

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE.......-0.6
TOTAL SNOWFALL FOR THE MONTH................4.2  DEPARTURE......-11.9
TOTAL SNOWFALL FOR THE SEASON..............24.2  DEPARTURE.......-7.9


PRELIMINARY CLIMATE SUMMARY FOR JANUARY CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/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


01/01  38/30/34/+7/..../0.0/400/73           39 W   AERO 38 W   RMY 41 
01/02  46/29/38/+11/0.00/0.0/269/49          28 SW  AERO 28 SW  RMY 30
01/03  46/40/43/+17/0.00/0.0/000/00          21 SW  AERO 18 SW  RMY N/A
01/04  46/36/41/+15/..../0.0/000/00          16 NNW AERO 16 NNW RMY N/A
01/05  36/24/30/+4/..../0.5/116/21           43 NW  AERO 46 NW  RMY 43
01/06  33/23/28/+2/T/T/133/24                26 W   AERO 21 W   RMY N/A
01/07  38/29/34/+8/..../0.4/161/29           30 WSW AERO 28 WSW RMY N/A
01/08  39/22/31/+5/..../0.4/350/63           50 W   AERO 46 WNW RMY 47
01/09  28/16/22/-4/..../0.0/540/97           43 WNW AERO 40 WNW RMY N/A
01/10  48/23/36/+11/T/..../0.0/106/19        37 SW  AERO 37 SW  RMY 39 
01/11  65/46/56/+31/..../0.0/408/73          53 SSW AERO 53 SSW RMY N/A           
01/12  68/36/52/+27/..../0.0/297/53          60 SSW AERO 62 SSW RMY N/A
01/13  39/31/35/+10/0.01/T/000/00            21 NE  AERO 20 NE  RMY N/A
01/14  38/31/35/+10/0.01/0.0/000/00          16 W   AERO 15 W   RMY N/A
01/15  48/35/42/+17/0.00/0.0/503/89          24 W   AERO 23 W   RMY 24
01/16  42/24/33/+8/0.06/T/142/25             54 W   AERO 52 W   RMY 59    
01/17  24/10/17/-8/0.00/0.0/552/97           50 NW  AERO 48 NW  RMY N/A
01/18  28/8/18/-7/0.35/2.8/000/00            28 WSW AERO 24 ESE RMY N/A
01/19  40/21/31/+6/0.02/0.2/332/58           44 W   AERO 44 W   RMY 42
01/20  26/12/19/-6/0.00/0.0/442/77           33 NW  AERO 32 NW  RMY N/A
01/21  24/10/17/-8/0.00/0.0/472/82           22 NW  AERO 21 NW  RMY N/A
01/22  34/13/24/-1/0.00/0.0/566/98           16 SW  AERO 16 SW  RMY N/A
01/23  46/26/36/+11/0.00/0.0/348/60          21 SW  AERO 20 SW  RMY 19
01/24  44/31/38/+13/0.00/0.0/524/90          21 ENE AERO 17 ENE RMY N/A
01/25  50/36/43/+18/0.57/0.0/..../..         41 ESE AERO 41 ESE RMY 40 
01/26  49/35/42/+17/0.00/0.0/..../..         33 W   AERO 31 W   RMY 32
01/27  43/33/38/+13/0.00/0.0/..../..         30 W   AERO 29 W   RMY 29
01/28  37/30/34/+9/0.00/0.0/..../..          25 NW  AERO 25 NW  RMY 27
01/29  38/23/31/+6/0.00/0.0/..../..          24 N   AERO 23 N   RMY 24

01/30 The low since midnight is 16F, daily normal minimum is 17F 

DAILY RECORDS FOR JANUARY

1/11/20: DAILY RECORD MAXIMUM TEMPERATURE OF 65F,
         BREAKS PREVIOUS RECORD OF 60F SET IN 1975.

1/11/20: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 46F,
         BREAKS PREVIOUS RECORD OF 40F SET IN 1983.

1/12/20: DAILY RECORD MAXIMUM TEMPERATURE OF 68F,
         BREAKS PREVIOUS RECORD OF 60 SET IN 2018.
         TIES HIGHEST MAXIMUM TEMPERATURE FOR JANUARY,
         MATCHES 68F SET ON 1/26/1950.

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

RECORDS FOR JANUARY 30
HIGH 60F IN 1914
LOW -8F IN 1948
PRECIP 1.12 INS. IN 1925
SNOWFALL 6.5 INS. IN 1986
PEAK GUST 76 MPH WNW IN 1962


RECORDS FOR JANUARY 31
HIGH 58F IN 1913, 1947, 2013
LOW -12F IN 1920
PRECIP 1.03 INS. IN 1914
SNOWFALL 9.0 INS. IN 1898
PEAK GUST 75 MPH NW IN 1974

TODAY'S REPORT PREPARED BY: Benjamin Turner