Saturday, March 2, 2019

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, MARCH 2, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

FOGGY DAY WITH QUICKLY ACCUMULATING SNOW THAT
DISSIPATED BY 1 P.M….

Snow began today sometime shortly before 6 A.M.
and has been accumulating since then, with a
total accumulation so far of 3.6 inches. Fog obscured
visibility to 1/8th of a mile until around 12:30
P.M. when fog began to lift for the 1 o’clock
observation, where visibility increased slightly
to 1 mile. Temperatures have not fluctuated very
much with our high temperature so far today being
31F, and our low temperature so far being 28F.
Wind speeds for today were faster than yesterday,
remaining consistent around 10 knots, with occasional
gusts over 20 knots. Pressure has been falling
throughout the day.

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: Snow, fog
Temperature: 30F; Dew Point: 30F; Wind: NNE at 10G18 kts
Sea-level pressure: 30.09 ins. Hg, falling, then more quickly
Visibility: 1/8 mile, fog
6-hr Max temp: 31F
6-hr Min temp: 29F
24-hr Precip:  0.04 ins.
24-hr snowfall: 0.5
Snow depth: 1 in.
BHO SA 1155 W3 X 1/8SF 189/30/30/0310G18/009/ 8////
4/001 58020 70004 10031 20029

10 A.M.
Weather: Snow, fog
Temperature: 30F; Dew Point: 30F; Wind: NNE at 10G20 kts
Sea-level pressure: 30.04 ins. Hg, falling, then more quickly
Visibility: 1/8 mile
3-hr Precip: 0.25 ins.
BHO SA 1455 W3 X 1/8SF 174/30/30/0310G20/004/ 8//// 6/025

1 P.M.
Weather: Light snow, thin fog in all directions
Temperature: 31F; Dew Point: 29F; Wind: NNE at 10G21 kts
Sea-level pressure: 29.98 ins. Hg, falling unsteadily
Visibility: 1 mile
6-hr Max temp: 31F
6-hr Min temp: 30F
6-hr Precip:  0.41 ins.
6-hr snowfall: 3.1 ins.
Snow depth: 4 ins.
BHO SA 1755 W3 X 1S-F 152/31/29/0310G21/998/ THN FG ALQDS F2/ 8////
4/004 57022 6/041 10031 20030

SUMMARY FOR FRIDAY, MARCH 1, 2019

TEMPERATURE (DEGREES F)
MAX…..38   NORMAL…..40
MIN…..17   NORMAL…..22
MEAN….28   NORMAL…..31

DEPARTURE FROM 30-YEAR NORMAL……………………-3
TOTAL DEPARTURE FOR THE MONTH……………………-3 [-2.8 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..37   DEPARTURE………+3
TOTAL HEATING UNITS FOR THE MONTH…………..37   DEPARTURE………+3
TOTAL HEATING UNITS FOR THE SEASON………..4523   DEPARTURE……..-79
TOTAL HEATING UNITS LAST SEASON TO DATE……4138   DIFFERENCE……+385

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..16 NNW AT  12:04 A.M.
AERO…………………….13 NNW AT  12:03 A.M.
ASOS…………………….13 N   AT  12:05 A.M.
DAVIS……………………16 NW  AT  12:02 A.M. RMY 22
FASTEST MILE FOR YESTERDAY………………….13 NNW AT  12:05 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….13 N   AT  12:05 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………13 NW  AT  12:04 A.M.
AVERAGE WIND SPEED AND DIRECTION……………6.0 SW
ASOS……………………6.7
DAVIS…………………..6.5 SSW [201 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.04  DEPARTURE…….-0.13
ASOS…………..0.04
TOTAL PRECIPITATION FOR THE MONTH……….0.04  DEPARTURE…….-0.12
ASOS…………..0.04
TOTAL PRECIPITATION FOR THE YEAR………..9.00  DEPARTURE…….+0.40
ASOS…………..9.11

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.5  DEPARTURE………0.0
TOTAL SNOWFALL FOR THE MONTH…………….0.5  DEPARTURE………0.0
TOTAL SNOWFALL FOR THE SEASON…………..25.0  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

PRELIMINARY CLIMATE SUMMARY FOR MARCH 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

03/01 38/17/28/-3/…./…/..              16 NNW AERO 13 NNW RMY 22

03/02 Low temp since midnight is 27F; normal low is 22F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):

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

RECORDS FOR MARCH 3
HIGH 64 IN 1991
LOW -1 IN 1950
PRECIP 2.36 INS. IN 1972
SNOWFALL 12.8 INS. IN 1960
PEAK GUST 78e MPH E IN 1942

TODAY’S REPORT PREPARED BY: Samantha Richard