Thursday, February 28, 2019

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

DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, FEBRUARY 28, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

SNOWY MORNING WITH WIND INCREASING
SLIGHTLY IN THE AFTERNOON….

We measured 3.5 inches of snow this morning
following last night’s event, and 0.25 inches
of liquid equivalent to that amount. Light
snow was observed this morning, ending well
before 11 A.M. Wind was below 10 mph on average
this morning, but has increased since then; with
a max gust so far of 18 mph after noontime. Ponds
remain frozen overnight throughout the uniform and
loosely packed snowfall. The high so far today is
28F, 12 degrees below the normal daily maximum
of 40F. The low since midnight is 15F, 7 degrees
below the normal minimum of 22F.

Today’s Observations:

7 A.M.
Weather: Light snow, overcast nimbostratus
Temperature: 15F; Dew Point: 15F; Wind: N at 8 kts
Sea-level pressure: 30.09 ins. Hg, rising steadily
Visibility: 3 miles, fog
6-hr Max temp: 17F
6-hr Min temp: 15F
24-hr Precip:  0.25 ins.
24-hr snowfall: 3.5 ins.
Snow depth: 4 ins.
BHO SA 1155 E65 OVC 3S-F 188/15/15/3508/009/ S-CTD/
8/02/ 4/004 70025 53013 10017 20015

10 A.M.
Weather: Broken cumulus, very light snow
Temperature: 21F; Dew Point: 15F; Wind: NW at 8 kts
Sea-level pressure: 30.15 ins. Hg, rising steadily
Visibility: 20 miles, distant fog
3-hr Precip: 0.02 ins.
BHO SA 1455 E35 BKN 20S- 209/21/15/3308/015/ DSNT
FG S-CTD PCPN VRY LGT/ 8/800 6002/ 51021

1 P.M.
Weather: Broken cumulus
Temperature: 27F; Dew Point: 14F; Wind: NW at 10G16 kts
Sea-level pressure: 30.17 ins. Hg, falling then rising
Visibility: 70 miles
6-hr Max temp: 28F
6-hr Min temp: 15F
6-hr Precip:  0.02 ins.
6-hr snowfall: Trace
Snow depth: 4 ins.
BHO SA 1755 E35 BKN 70 217/27/14/3310G16/017/ 8/800
4/003 6002/ 50008 10028 20015

SUMMARY FOR WEDNESDAY, FEBRUARY 27, 2019

TEMPERATURE (DEGREES F)
MAX…..22   NORMAL…..39
MIN……9   NORMAL…..22
MEAN….16   NORMAL…..31

DEPARTURE FROM 30-YEAR NORMAL…………………..-15
TOTAL DEPARTURE FOR THE MONTH…………………..+54 [+1.8 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..43   DEPARTURE……..+15
TOTAL HEATING UNITS FOR THE MONTH………….947   DEPARTURE……..-56
TOTAL HEATING UNITS FOR THE SEASON………..4443   DEPARTURE……..-91
TOTAL HEATING UNITS LAST SEASON TO DATE……4105   DIFFERENCE……+338

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..35 WNW AT  3:54 A.M.
AERO…………………….26 WNW AT  3:52 A.M.
ASOS…………………….35 NW  AT  3:55 A.M.
DAVIS……………………37 W   AT  3:54 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY………………….25 WNW AT  3:55 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….24 NW  AT  3:55 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………26 W   AT  3:55 A.M.
AVERAGE WIND SPEED AND DIRECTION……………8.1 WNW
ASOS……………………8.4
DAVIS…………………..8.4 W [265 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.35  DEPARTURE…….+0.09
ASOS…………..0.32
TOTAL PRECIPITATION FOR THE MONTH……….3.59  DEPARTURE…….-0.31
ASOS…………..3.57
TOTAL PRECIPITATION FOR THE YEAR………..8.94  DEPARTURE…….+0.69
ASOS…………..9.05

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….3.5  DEPARTURE……..+3.0
TOTAL SNOWFALL FOR THE MONTH……………12.1  DEPARTURE……..-4.3
TOTAL SNOWFALL FOR THE SEASON…………..24.5  DEPARTURE…….-22.0

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/+4/0.00/0.0/594/97          44 WNW AERO 42 WNW RMY 45
02/15 49/29/39/+11/0.11/0.0/060/10         40 S   AERO 40 S   RMY 44
02/16 44/26/35/+7/0.00/0.0/504/82          25 NW  AERO 25 NW  RMY N/A
02/17 37/19/28/0/…./…/618/100          30 NNW AERO 25 NNW RMY N/A
02/18 30/16/23/-6/…./…/000/00          35 NW  AERO 36 NW  RMY 41
02/19 30/10/20/-9/0.00/0.0/618/99          35 NW  AERO 33 NW  RMY N/A
02/20 26/12/19/-10/…./…/000/00         16 WNW AERO 14 SSW RMY N/A
02/21 43/21/32/+3/…./…/294/47          36 W   AERO 33 W   RMY 38
02/22 43/30/37/+8/…./0.0/504/80          22 NW  AERO 21 NW  RMY 23
02/23 38/24/31/+1/0.00/0.0/336/53          18 NNW AERO 16 NNW RMY N/A
02/24 45/30/38/+8/…./…/000/00          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 22/9/16/-15/…./…/…/..          35 WNW AERO 26 WNW RMY N/A

02/28 Low temp since midnight is 15F; normal low is 22F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):

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

RECORDS FOR MARCH 1
HIGH 62 IN 1972
LOW -3 IN 1886
PRECIP 1.65 INS. IN 1900
SNOWFALL 9.4 INS. IN 1949
PEAK GUST 78 WSW IN 1966

TODAY’S REPORT PREPARED BY: Benjamin Turner