Friday, March 1, 2019

| March 2, 2019 | Reply

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

DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, MARCH 1, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

A FAIR WEATHER DAY WITH LIGHT AND
VARIABLE WINDS ATOP GREAT BLUE HILL….

We measured a trace of snow and 0.02 inches
of liquid from yesterday’s light snow following
the 7 A.M. observation. The snow total for
February is 12.1 inches, 1.8 inches under the
normal total for the month. The snow total so
far this season is 24.5 inches, which is 22.5
inches below normal.

Today we observed light and variable winds,
and a notably low max gust of 12 mph since 7 A.M.
The overcast seen this morning broke up around 8
A.M., revealing a distant cirrostratus layer along
the horizon. Snow depth has decreased from 2 to 1
inches since this morning due to constant sunlight
before and following the 10 A.M. observation.

The high temperature so far today is 36F, 4 degrees
below the normal daily maximum of 40F. The low since
midnight is 17F, 5 degrees below the normal minimum
of 22F.

PRELIMINARY STATS FOR FEBRUARY 2019

TEMPERATURE, Deg. F
Avg. Max. 37.3 [+0.5]
Avg. Min. 21.6 [-2.5]
Mean      29.5 [+1.6]
24-hour corrected mean: 29.2
Max. for month: 62F on the 5th
Min. for month: 5F  on the 1st

HEATING DEGREE DAYS
Total heating units:    990 [-47]
Total for the season:  4486 [-82]
Total for last season: 4122

PRECIPITATION, Inches
Total: 3.61 [-0.46]
Greatest in 24 hrs: N/A

SNOWFALL, Inches
Total: 12.1 [-1.8]
Greatest in 24 hrs: N/A

WIND, mph
Avg. uncorrected wind speed: 12.9
Avg. corrected wind speed: 13.3
Prevailing wind direction: WNW at 22%
Peak gust and direction: 66 W on 25th

SUNSHINE:
Campbell-Stokes card minutes: N/A
Astronomical total minutes:   N/A

Today’s Observations:

7 A.M.
Weather: Overcast altostratus
Temperature: 19F; Dew Point: 5F; Wind: W at 3 kts,
Wind: Light and variable
Sea-level pressure: 30.36 ins. Hg, rising steadily
Visibility: 75 miles
6-hr Max temp: 20F
6-hr Min temp: 17F
24-hr Precip:  0.02 ins.
24-hr snowfall: Trace
Snow depth: 2 ins.
BHO SA 1155 E80 OVC 75 282/19/5/2803/036/ SUN DMLY VSBL
WND L/V/ 8/01/ 4/002 70002 53015 10020 20017

10 A.M.
Weather: Scattered cirrostratus
Temperature: 28F; Dew Point: 7F; Wind: W at 3 kts,
Wind: Light and variable
Sea-level pressure: 30.39 ins. Hg, falling then rising
Visibility: 70 miles, thin smoke layer in all directions
3-hr Precip: 0.00 ins.
BHO SA 1455 250 SCT 70 290/28/7/2803/039/ THN K LYR ALQDS
WND L/V/ 8/005 50008

1 P.M.
Weather: Scattered cirrostratus, few cumulus
Temperature: 35F; Dew Point: 12F; Wind: S at 3 kts,
Wind: Light and variable
Sea-level pressure: 30.34 ins. Hg, falling steadily
Visibility: 70 miles
6-hr Max temp: 36F
6-hr Min temp: 18F
6-hr Precip:  0.00 ins.
6-hr snowfall: 0.0 ins.
Snow depth: 1 in.
BHO SA 1755 250 SCT 70 274/35/12/1903/034/ FEW CU ALQDS WND
L/V/ 8/105 4/001 58016 10036 20018

SUMMARY FOR THURSDAY, FEBRUARY 28, 2019

TEMPERATURE (DEGREES F)
MAX…..28   NORMAL…..40
MIN…..15   NORMAL…..22
MEAN….22   NORMAL…..31

DEPARTURE FROM 30-YEAR NORMAL……………………-9
TOTAL DEPARTURE FOR THE MONTH…………………..+45 [+1.4 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..43   DEPARTURE………+9
TOTAL HEATING UNITS FOR THE MONTH………….990   DEPARTURE……..-47
TOTAL HEATING UNITS FOR THE SEASON………..4486   DEPARTURE……..-82
TOTAL HEATING UNITS LAST SEASON TO DATE……4122   DIFFERENCE……+364

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..22 NW  AT  2:33 P.M.
AERO…………………….18 NW  AT  2:30 P.M.
ASOS…………………….22 NNW AT  2:34 P.M.
DAVIS……………………21 W   AT  2:33 P.M. RMY 22
FASTEST MILE FOR YESTERDAY………………….15 NW  AT  3:00 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….16 NW  AT  2:59 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………16 W   AT  2:59 P.M.
AVERAGE WIND SPEED AND DIRECTION……………7.0 NNW
ASOS……………………7.5
DAVIS…………………..7.4 NNW [301 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.02  DEPARTURE…….-0.15
ASOS…………..0.02
TOTAL PRECIPITATION FOR THE MONTH……….3.61  DEPARTURE…….-0.46
ASOS…………..3.59
TOTAL PRECIPITATION FOR THE YEAR………..8.96  DEPARTURE…….+0.54
ASOS…………..9.07

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………T  DEPARTURE……..+3.0
TOTAL SNOWFALL FOR THE MONTH……………12.1  DEPARTURE……..-1.8
TOTAL SNOWFALL FOR THE SEASON…………..24.5  DEPARTURE…….-22.5

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 28/15/22/-9/…./…/…/..          22 NW  AERO 18 NW  RMY 22

03/01 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 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

RECORDS FOR MARCH 2
HIGH 63 IN 2004
LOW -3 IN 1886
PRE 3.47 INS. IN 2018
SNOW 8.2 INS. IN 2009
WIND 75 MPH NW IN 1966

TODAY’S REPORT PREPARED BY: Benjamin Turner

Category: Daily Discussions

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