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

DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, JANUARY 28, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

ANOTHER CLOUDY AND CHILLY DAY ATOP GREAT BLUE HILL....

Skies have once again been mainly cloudy today as a weak
disturbance passes over the region. Even some snow showers
have been occurring off and on since late this morning, but
they are not amounting to anything, just flakes in the air.

A mainly light northwesterly breeze has been occurring, 
occasionally getting a bit gusty into the 20-25 mph range.
The peak gust so far today is 25 mph. 

Visibility has been excellent today, running between 70 and 80
miles. 

We continue to expand our rain and snowfall deficits for the 
month. The rainfall total is 1.46 inches, 2.34 inches below
the average rain total. Snowfall for this month is considerably
low, amounting to only 4.2 inches. That is 10.8 inches below
the normal monthly snowfall total. 

The high so far today is 37F, 3 degrees above the normal high
of 34F. The low since midnight is 31F, 14 degrees above the
normal low of 17F.


Today's Observations:

7 A.M.
Weather: Overcast stratocumulus
Temperature: 32F; Dew Point: 26F; Wind: NW at 8 kts
Sea-level pressure: 29.70 ins. Hg, rising, then more rapidly
Visibility: 60 miles
6-hr Max temp: 35F
6-hr Min temp: 31F
24-hr Precip:  0.00 ins.
24-hr Snowfall: 0.0 ins. 
BHO SA 1155 E60 OVC 60 058/32/26/3108/970/ FEW BINOVC NW-N
FEW SCSL NNW FEW LWR SC NE-E HIER CLDS VSBL NW/ 8/52/ 53014
10035 20031

10 A.M.
Weather: Overcast stratocumulus, light snow shower
Temperature: 36F; Dew Point: 25F; Wind: NW at 10 kts
Sea-level pressure: 29.74 ins. Hg, rising, then more slowly
Visibility: 70 miles
3-hr Precip:   Trace
3-hr Snowfall: Trace
BHO SA 1455 E40 BKN 65 OVC 70SW- 071/36/25/3110/974/ FEW BINOVC
NW AND DSNT SE-S PCPN VRY LGT SB55/ 8/5// 51013 6000

1 P.M.
Weather: Overcast stratocumulus, light snow shower
Temperature: 35F; Dew Point: 23F; Wind: NW at 9 kts
Sea-level pressure: 29.72 ins. Hg, rising, then falling
Visibility: 80 miles
6-hr Max temp: 37F
6-hr Min temp: 32F
6-hr Precip:   Trace
6-hr Snowfall: Trace
BHO SA 1755 E40 OVC 80SW- 065/35/23/3209/972/ FEW BINOVC DSNT S
VIRGA ALQDS PCPN VRY LGT SB40/ 8/5// 58006 6000 10037 20032


SUMMARY FOR MONDAY, JANUARY 27, 2020 

TEMPERATURE (DEGREES F)
MAX.....43   NORMAL.....34
MIN.....33   NORMAL.....17
MEAN....38   NORMAL.....25

DEPARTURE FROM 30-YEAR NORMAL.....................+13
TOTAL DEPARTURE FOR THE MONTH....................+227 [+8.2 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY...............27  DEPARTURE.......-13
TOTAL HEATING UNITS FOR THE MONTH..............842  DEPARTURE......-226
TOTAL HEATING UNITS FOR THE SEASON............3093  DEPARTURE......-280
TOTAL HEATING UNITS LAST SEASON TO DATE.......3315  DEPARTURE......-222

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY....................30 W   AT  2:32 P.M.  
                   AERO.........................29 W   AT  2:24 P.M.   
                   ASOS.........................29 W   AT  2:32 P.M. 
                   DAVIS........................31 W   AT  2:26 P.M. RMY 29
FASTEST MILE FOR YESTERDAY......................23 W   AT  2:32 P.M. 
MAXIMUM 2-MINUTE ASOS AVERAGE...................21 W   AT  2:34 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE..................23 W   AT  2:31 P.M.
AVERAGE WIND SPEED AND DIRECTION..............12.0 W                 
                   ASOS.......................11.8 
                   DAVIS......................12.6 W [266 deg.]


PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE......-0.13
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........1.46  DEPARTURE......-2.34
                         ASOS..............1.54
TOTAL PRECIPITATION FOR THE YEAR...........1.46  DEPARTURE......-2.34
                         ASOS..............1.54

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE.......-0.5
TOTAL SNOWFALL FOR THE MONTH................4.2  DEPARTURE......-10.8
TOTAL SNOWFALL FOR THE SEASON..............24.2  DEPARTURE.......-6.8


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/..../..           39 W   AERO 38 W   RMY 41 
01/02  46/29/38/+11/0.00/0.0/..../..          28 SW  AERO 28 SW  RMY 30
01/03  46/40/43/+17/0.00/0.0/..../..          21 SW  AERO 18 SW  RMY N/A
01/04  46/36/41/+15/..../0.0/..../..          16 NNW AERO 16 NNW RMY N/A
01/05  36/24/30/+4/..../0.5/..../..           43 NW  AERO 46 NW  RMY 43
01/06  33/23/28/+2/T/T/..../..                26 W   AERO 21 W   RMY N/A
01/07  38/29/34/+8/..../0.4/.../..            30 WSW AERO 28 WSW RMY N/A
01/08  39/22/31/+5/..../0.4/.../..            50 W   AERO 46 WNW RMY 47
01/09  28/16/22/-4/..../0.0/.../..            43 WNW AERO 40 WNW RMY N/A
01/10  48/23/36/+11/T/..../0.0/.../..         37 SW  AERO 37 SW  RMY 39 
01/11  65/46/56/+31/..../0.0/.../..           53 SSW AERO 53 SSW RMY N/A           
01/12  68/36/52/+27/..../0.0/.../..           60 SSW AERO 62 SSW RMY N/A
01/13  39/31/35/+10/0.01/T/.../..             21 NE  AERO 20 NE  RMY N/A
01/14  38/31/35/+10/0.01/0.0/.../..           16 W   AERO 15 W   RMY N/A
01/15  48/35/42/+17/0.00/0.0/.../..           24 W   AERO 23 W   RMY 24
01/16  42/24/33/+8/0.06/T/.../..              54 W   AERO 52 W   RMY 59    
01/17  24/10/17/-8/0.00/0.0/..../..           50 NW  AERO 48 NW  RMY N/A
01/18  28/8/18/-7/0.35/2.8/..../..            28 WSW AERO 24 ESE RMY N/A
01/19  40/21/31/+6/0.02/0.2/..../..           44 W   AERO 44 W   RMY 42
01/20  26/12/19/-6/0.00/0.0/..../..           33 NW  AERO 32 NW  RMY N/A
01/21  24/10/17/-8/0.00/0.0/..../..           22 NW  AERO 21 NW  RMY N/A
01/22  34/13/24/-1/0.00/0.0/..../..           16 SW  AERO 16 SW  RMY N/A
01/23  46/26/36/+11/0.00/0.0/..../..          21 SW  AERO 20 SW  RMY 19
01/24  44/31/38/+13/0.00/0.0/..../..          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

01/27 The low since midnight is 31F, 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 28
HIGH 59F IN 1916
LOW -9F IN 1888, 1924
PRECIP 2.18 INS. IN 1897
SNOWFALL 15.0 INS. IN 1897
PEAK GUST 78e MPH SSE IN 1977

RECORDS FOR JANUARY 29
HIGH 66F IN 2002
LOW -11F IN 1888
PRECIP 1.48 INS. IN 1973
SNOWFALL 8.0 INS. IN 1943
PEAK GUST 72 MPH NW IN 1973

TODAY'S REPORT PREPARED BY: Matt Douglas