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

DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, FEBRUARY 27, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

RELATIVELY LIGHT WINDS TODAY WITH BUILDING
CLOUD COVER....

We observed a good visibility of 70 miles 
throughout the day. Weather conditions were
overcast and chilly following the 10 A.M. 
observation, with a max temperature of only 
22F. That is 18 degrees below our daily normal
maximum temperature of 40F. The low since midnight
is 9F, 13 degrees below the normal minimum of 22F.
Wind remained relatively light, with an average speed
at or below 10 mph for the majority of the day. The air
was also considerably dry, with a humidity below 30%
since 10 A.M.


Today's Observations:

7 A.M.
Weather: Scattered altocumulus, broken cirrostratus,
few cumulus offshore
Temperature: 9F; Dew Point: -10F; Wind: NW at 12G18 kts
Sea-level pressure: 30.41 ins. Hg, rising steadily
Visibility: 70 miles
6-hr Max temp: 14F
6-hr Min temp:  8F
24-hr Precip:  0.00 ins.
24-hr snowfall: 0.0 ins.
Snow depth: 0 ins. 
BHO SA 1155 140 SCT E250 BKN 70 299/9/-10/3112G18/041/ 
FEW CU OFFSHR/ 8/135 51007 10014 20008

10 A.M.
Weather: Broken altostratus, overcast cirrostratus
Temperature: 16F; Dew Point: -12F; Wind: W at 9G15 kts 
Sea-level pressure: 30.40 ins. Hg, falling steadily
Visibility: 70 miles
3-hr Precip: 0.00 ins. 
BHO SA 1455 E160 BKN 300 OVC 70 297/16/-12/2809G15/040/ 
8/025 58002

1 P.M.
Weather: Overcast altostratus
Temperature: 20F; Dew Point: -8F; Wind: WNW at 7G14 kts 
Sea-level pressure: 30.32 ins. Hg, falling rapidly
Visibility: 70 miles
6-hr Max temp: 22F
6-hr Min temp:  9F
6-hr Precip:  0.00 ins.
6-hr snowfall: 0.0 ins.
Snow depth: 0 ins. 
BHO SA 1755 E110 OVC 70 267/20/-8/2907G14/032/ 8/02/ 
58030 10022 20009


SUMMARY FOR TUESDAY, FEBRUARY 26, 2019 

TEMPERATURE (DEGREES F)
MAX.....29   NORMAL.....39
MIN.....14   NORMAL.....21
MEAN....22   NORMAL.....30

DEPARTURE FROM 30-YEAR NORMAL........................-8
TOTAL DEPARTURE FOR THE MONTH.......................+69 [+2.5 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY..............43   DEPARTURE.........+8
TOTAL HEATING UNITS FOR THE MONTH.............898   DEPARTURE........-70
TOTAL HEATING UNITS FOR THE SEASON...........4394   DEPARTURE.......-105
TOTAL HEATING UNITS LAST SEASON TO DATE......4080   DIFFERENCE......+214

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY....................46 WNW AT  2:22 P.M.
                   AERO.........................39 WNW AT 12:40 A.M.
                   ASOS.........................46 WNW AT  1:49 P.M. 
                   DAVIS........................49 W   AT  2:21 P.M. RMY 47
FASTEST MILE FOR YESTERDAY......................34 WNW AT  1:46 P.M. 
MAXIMUM 2-MINUTE ASOS AVERAGE...................32 WNW AT  1:50 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE..................36 W   AT 12:32 A.M.
AVERAGE WIND SPEED AND DIRECTION..............22.7 WNW
                   ASOS.......................20.3
                   DAVIS......................22.6 W [263 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE.......-0.16
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........3.34  DEPARTURE.......-0.40
                         ASOS..............3.34
TOTAL PRECIPITATION FOR THE YEAR...........8.69  DEPARTURE.......+0.60
                         ASOS..............8.82

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE........-0.4
TOTAL SNOWFALL FOR THE MONTH................8.6  DEPARTURE........-4.3
TOTAL SNOWFALL FOR THE SEASON..............21.0  DEPARTURE.......-25.0


PRELIMINARY CLIMATE SUMMARY FOR FEBRUARY 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

02/01 19/5/12/-14/0.00/0.0/552/95          29 W   AERO 28 W   RMY N/A
02/02 30/7/19/-7/0.00/0.0/318/55           32 WSW AERO 32 WSW RMY 31
02/03 38/27/33/+7/0.00/0.0/126/22          26 S   AERO 25 S   RMY N/A
02/04 59/33/46/+20/0.00/0.0/540/93         25 SSW AERO 28 SSW RMY N/A
02/05 62/39/51/+25/0.00/0.0/354/60         30 WNW AERO 29 WNW RMY 32
02/06 39/28/34/+8/..../.../396/67          24 NNW AERO 23 NNW RMY N/A
02/07 37/31/34/+7/..../.../000/00          28 ENE AERO 24 ENE RMY 28
02/08 51/27/39/+12/..../.../204/34         46 W   AERO 46 WNW RMY 51
02/09 32/20/26/-1/0.00/0.0/594/100         50 WNW AERO 52 WNW RMY 52
02/10 33/18/26/-1/0.00/0.0/510/85          24 WNW AERO 23 WNW RMY 25
02/11 34/21/28/+1/0.00/0.0/318/53          24 NNW AERO 23 NNW RMY 25
02/12 33/13/23/-4/..../2.8/000/00          32 E   AERO 30 E   RMY 26
02/13 39/29/34/+6/..../0.1/018/03          36 W   AERO 32 W   RMY 36
02/14 37/26/32/+4/0.00/0.0/.../..          44 WNW AERO 42 WNW RMY 45
02/15 49/29/39/+11/0.11/0.0/.../..         40 S   AERO 40 S   RMY 44
02/16 44/26/35/+7/0.00/0.0/.../..          25 NW  AERO 25 NW  RMY N/A
02/17 37/19/28/0/..../.../.../..           30 NNW AERO 25 NNW RMY N/A
02/18 30/16/23/-6/..../.../.../..          35 NW  AERO 36 NW  RMY 41
02/19 30/10/20/-9/0.00/0.0/.../..          35 NW  AERO 33 NW  RMY N/A
02/20 26/12/19/-10/..../.../.../..         16 WNW AERO 14 SSW RMY N/A
02/21 43/21/32/+3/..../.../.../..          36 W   AERO 33 W   RMY 38
02/22 43/30/37/+8/..../0.0/.../..          22 NW  AERO 21 NW  RMY 23
02/23 38/24/31/+1/0.00/0.0/.../..          18 NNW AERO 16 NNW RMY N/A
02/24 45/30/38/+8/..../.../.../..          41 W   AERO 37 W   RMY 47
02/25 37/25/31/+1/..../.../.../..          66 W   AERO 59 W   RMY M 
02/26 29/14/22/-8/0.00/0.0/.../..          46 WNW AERO 39 WNW RMY 47

02/27 Low temp since midnight is 8F; normal low is 22F
 

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

RECORDS FOR FEBRUARY 27
HIGH 61F IN 1976
LOW -8F IN 1900
PRECIP 1.43 INCHES IN 2013
SNOWFALL 6.0 INCHES IN 1922
PEAK GUST 67 MPH W IN 1985

RECORDS FOR FEBRUARY 28
HIGH 62F IN 1976
LOW -2F IN 1907,1934
PRECIP 1.79 INCHES IN 1958
SNOWFALL 8.5 INCHES IN 2005
PEAK GUST 88e MPH SSW IN 1943

TODAY'S REPORT PREPARED BY: Benjamin Turner