Friday, February 15, 2019

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

DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, FEBRUARY 15, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

OVERCAST AND MILD WITH LIGHT RAINFALL
LATER ON….

Light rain began following the 10 A.M.
observation, leaving 0.03 inches in the
gauge by the 1 P.M. observation. This is
in conjunction with a pressure drop of
more than 6 millibars since 7 A.M. Wind
has shifted from southeast to south as
the day went on, with a peak gust of
39 mph so far today. The high temperature
so far today is 47F, 10 degrees above our
normal maximum temperature of 37F. The low
since midnight is 29F, 10 degrees above the
daily normal low of 19F.

PRELIMINARY STATS FOR JANUARY 2019

TEMPERATURE, Deg. F
Avg. Max. 34.3 [+0.5] Avg. Min. 17.9 [+0.8] Mean      26.1 [+0.6] 24-hour corrected mean: 26.7
Max. for month: 57F on  24th
Min. for month: -2F on the 21st and 31st

HEATING DEGREE DAYS
Total heating units:   1200 [-26] Total for the season:  3495 [-36] Total for last season: 3321

PRECIPITATION, Inches
Total: 5.35 [+1.00] Greatest in 24 hrs: 2 inches on the 19th-20th

SNOWFALL, Inches
Total: 4.7 [-12.4] Greatest in 24 hrs: 4.2 inches on the 19th-20th

WIND, mph
Avg. uncorrected wind speed: 13.4
Avg. corrected wind speed: 13.7
Prevailing wind direction: NW at 19%
Peak gust and direction: 77 S on 24th

SUNSHINE:
Campbell-Stokes card minutes: 8988 minutes of possible 17130 or 52%
Astronomical total minutes:   9273 minutes of possible 17650 or 53%

BHO Coldest January Daily Maximum Temperature, deg F (1885-2019):

1) -1 on January 28, 1888
2) 1 on January 12, 1886
3) 2 on January 8, 1968
4) 3 on January 6, 1896
3 on January 4, 1904
3 on January 21, 2019
7) 4 on January 17, 1907
4 on January 24, 1907
4 on January 16, 1994

Today’s Observations:

7 A.M.
Weather: Scattered stratus fractus, overcast altostratus
Temperature: 32F; Dew Point: 28F; Wind: SE at 14G22 kts
Sea-level pressure: 29.97 ins. Hg, falling rapidly
Visibility: 40 miles
6-hr Max temp: 32F
6-hr Min temp: 29F
24-hr Precip: 0.00 ins.
24-hr snowfall: 0.0 ins
Snow depth: 1 ins.
BHO SA 1155 40 SCT E140 OVC 40 148/32/28/1418G22/997/
8/72/ 4/001 56027 10032 20029

10 A.M.
Weather: Overcast nimbostratus, few stratus fractus
Temperature: 42F; Dew Point: 36F; Wind: SSE at 16G28 kts,
Peak wind: 32 MPH (28 kts) at 9:52 A.M.
Sea-level pressure: 29.91 ins. Hg, falling rapidly
Visibility: 30 miles, distant fog
3-hr Precip: 0.00 ins.
BHO SA 1455 E65 OVC 30 127/42/36/1516G28/991/
FEW STFA DSNT FG ALQDS PK WND 1528/52/ 8/72/ 58021

1 P.M.
Weather: Overcast nimbostratus, few stratus fractus,
light rain
Temperature: 45F; Dew Point: 45F; Wind: S at 16G26 kts,
Peak Wind: 32 MPH (28 kts) S at 11:26 A.M.
Sea-level pressure: 29.78 ins. Hg, falling rapidly
Visibility: 20 miles, distant fog
6-hr Max temp: 47F
6-hr Min temp: 32F
6-hr Precip:  0.03 ins.
6-hr snowfall: 0.0 ins.
Snow depth: 1 in.
BHO SA 1755 E65 OVC 20R- 083/45/45/1716G26/978/
FEW STFA DSNT FG ALQDS R-CTD PK WND 1728/1626/
8/72/ 4/001 6003/ 58044 10047 20032

SUMMARY FOR THURSDAY, FEBRUARY 14, 2019

TEMPERATURE (DEGREES F)
MAX…..37   NORMAL…..36
MIN…..26   NORMAL…..19
MEAN….32   NORMAL…..28

DEPARTURE FROM 30-YEAR NORMAL……………………+4
TOTAL DEPARTURE FOR THE MONTH…………………..+63 [+4.3 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..33   DEPARTURE………-4
TOTAL HEATING UNITS FOR THE MONTH………….473   DEPARTURE……..-64
TOTAL HEATING UNITS FOR THE SEASON………..3969   DEPARTURE……..-99
TOTAL HEATING UNITS LAST SEASON TO DATE……3805   DIFFERENCE……+164

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..44 WNW AT  9:46 A.M.
AERO…………………….41 WNW AT  9:47 A.M.
ASOS…………………….47 W   AT  9:48 A.M.
DAVIS……………………50 W   AT  9:47 A.M. RMY 45
FASTEST MILE FOR YESTERDAY………………….35 WNW AT  9:49 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….33 W   AT  9:49 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………37 W   AT  9:49 A.M.
AVERAGE WIND SPEED AND DIRECTION…………..14.5 W
ASOS…………………..13.9
DAVIS………………….14.9 W [277 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……….1.93  DEPARTURE…….+0.01
ASOS…………..1.89
TOTAL PRECIPITATION FOR THE YEAR………..7.28  DEPARTURE…….+1.01
ASOS…………..7.37

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0  DEPARTURE……..-0.5
TOTAL SNOWFALL FOR THE MONTH…………….2.9  DEPARTURE……..-4.0
TOTAL SNOWFALL FOR THE SEASON…………..15.3  DEPARTURE…….-24.7

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 38/27/26/+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/…./…/…/.. 28 ENE AERO 24 ENE RMY 28
02/08 51/27/39/+12/…./…/…/..         46 W   AERO 46 WNW RMY 51
02/09 32/20/26/-1/0.00/0.0/…/..          50 WNW AERO 52 WNW RMY 52
02/10 33/18/26/-1/0.00/0.0/…/..          24 WNW AERO 23 WNW RMY 25
02/11 34/21/28/+1/0.00/0.0/…/..          24 NNW AERO 23 NNW RMY 25
02/12 33/13/23/-4/…./2.8/…/..          32 E   AERO 30 E   RMY 26
02/13 39/29/34/+6/…./0.1/…/..          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 Low temp since midnight is 29F; normal low is 19F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):

RECORDS FOR FEBRUARY 15
HIGH 60F IN 1954
LOW -18F IN 1943
PRECIP 1.28 INCHES IN 1950
SNOWFALL 14.4 INCHES IN 2015
PEAK GUST 94e MPH WNW IN 1946

RECORDS FOR FEBRUARY 16
HIGH 62F IN 1954
LOW -16F IN 1943
PRECIP 1.91 INCHES IN 1958
SNOWFALL 18.6 INCHES IN 1958
PEAK GUST 78 MPH W IN 1967

TODAY’S REPORT PREPARED BY: Benjamin Turner