Sunday, March 15, 2020

| March 16, 2020 | Reply

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, MARCH 15, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

FAIR WEATHER FOLLOWING SOME MORNING CLOUDS,
WITH GOOD VISIBILITY THROUGHOUT….

Sky conditions improved as the day went on, most likely
due to a steady rise in pressure. Visibility was 80 miles
on average, decreasing to 75 miles after noontime. A
consistent westerly wind has been coming in at around 10
mph for the majority of the day, with gusts barely touching
20 mph.

Despite a cool westerly breeze and some morning clouds,
temperatures remain above normal for the day.
The high so far today is 45F, this is a degree above the
normal high of 44F. The low since midnight is 33F, this is
7 degrees above the normal low of 26F.

All times used within this discussion are in
Eastern Standard Time (EST).

PRELIMINARY STATS FOR FEBRUARY 2020

TEMPERATURE, Deg. F
Avg. Max. 40.7 [+3.9]
Avg. Min. 25.9 [+6.7]
Mean      33.3 [+5.4]
24-hour corrected mean: 33.0
Max. for month: 60F on the 24th
Min. for month: 4F on the 15th

HEATING DEGREE DAYS
Total heating units:    911 [-164]
Total for the season:  4140 [-345]
Total for last season: 4485

PRECIPITATION, Inches
Total: 3.20 [-0.87]
Greatest in 24 hrs: 0.74 on the 26th-27th

SNOWFALL, Inches
Total: 0.6 [-13.3]
Greatest in 24 hrs: 0.5 ins. on the 13th

WIND, mph
Avg. uncorrected wind speed: 11.5 mph
Avg. corrected wind speed:   12.0 mph
Prevailing wind direction:   W [24%]
Peak gust and direction:     71 WSW on the 7th

SUNSHINE:
Campbell-Stokes card minutes: 7596 minutes of possible 17796 or 43%
Astronomical total minutes: 7853 minutes of possible 18422 or 43%

Today’s Observations:

7 A.M.
Weather: Scattered altocumulus
Temperature: 34F; Dew Point: 8F; Relative Humidity: 33%
Wind: NNW at 12G17 kts
Sea-level pressure: 30.41 ins. Hg: rising steadily
Visibility: 80 miles
6-hr Max temp: 38F
6-hr Min temp: 33F
24-hr Precip:  0.00 ins.
24-hr Snowfall: 0.0 ins.
BHO SA 1155 110 SCT 80 299/34/8/3512G17/041/ 8/070
53028 10038 20033

10 A.M.
Weather: Clear, few cirrostratus
Temperature: 41F; Dew Point: 8F; Relative Humidity: 25%
Wind: NNW at 8 kts
Sea-level pressure: 30.44 ins. Hg: rising steadily
Visibility: 80 miles
3-hr Precip:  0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 CLR 80 309/41/8/3508/044/ FEW CS ALQDS/
8/005 51010

1 P.M.
Weather: Clear, few distant cumulus offshore
Temperature: 43F; Dew Point: 6F; Relative Humidity: 21%
Wind: WNW at 8 kts
Sea-level pressure: 30.41 ins. Hg: falling slowly
Visibility: 75 miles
6-hr Max temp: 45F
6-hr Min temp: 34F
6-hr Precip:  0.00 ins.
6-hr Snowfall: 0.0 ins.
BHO SA 1755 CLR 75 300/43/6/2908/041/ FEW DSNT CU
OFFSHR/ 8/100 58009 10045 20034

SUMMARY FOR SATURDAY, MARCH 14, 2020

TEMPERATURE (DEGREES F)
MAX…..51   NORMAL…..44
MIN…..35   NORMAL…..26
MEAN….43   NORMAL…..35

DEPARTURE FROM 30-YEAR NORMAL……………….+8
TOTAL DEPARTURE FOR THE MONTH………………+151 [+10.6 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………22  DEPARTURE…….-8
TOTAL HEATING UNITS FOR THE MONTH…………..300  DEPARTURE……-151
TOTAL HEATING UNITS FOR THE SEASON…………4440  DEPARTURE……-579
TOTAL HEATING UNITS LAST SEASON TO DATE…….4987  DEPARTURE……-547

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..37 W   AT   8:44 A.M.
AERO…………………….36 W   AT   8:42 A.M.
ASOS…………………….37 W   AT   8:44 A.M.
DAVIS……………………39 W   AT   8:43 A.M. RMY 35
FASTEST MILE FOR YESTERDAY………………….26 W   AT   8:11 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….26 W   AT   8:11 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………28 W   AT   8:11 A.M.
AVERAGE WIND SPEED AND DIRECTION…………..16.3 W
ASOS…………………..15.5
DAVIS………………….16.6 W [277 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE……-0.17
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….0.26  DEPARTURE……-2.04
ASOS…………..0.29
TOTAL PRECIPITATION FOR THE YEAR………..4.92  DEPARTURE……-5.80
ASOS…………..5.20

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0  DEPARTURE…….-0.4
TOTAL SNOWFALL FOR THE MONTH…………….0.8  DEPARTURE…….-6.1
TOTAL SNOWFALL FOR THE SEASON…………..25.6  DEPARTURE……-28.3

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  38/30/34/+8/0.01/T/000/00           14 WSW AERO 14 WSW RMY N/A
02/02  40/30/35/+9/0.00/0.0/078/13         18 W   AERO 18 WNW RMY 18
02/03  44/27/36/+10/0.00/0.0/260/43        28 W   AERO 28 W   RMY 28
02/04  44/33/39/+13/T/0.0/055/09           19 E   AERO 16 E   RMY 18
02/05  41/30/36/+10/0.08/T/000/00          20 NNW AERO 19 NNW RMY N/A
02/06  31/30/34/+8/0.56/0.1/000/00         29 E   AERO 28 E   RMY 27
02/07  53/25/39/+12/0.29/0.0/000/00        71 WSW AERO 71 SSW RMY 73
02/08  33/20/27/0/T/T/616/100              46 W   AERO 44 W   RMY 44
02/09  33/15/24/-3/T/T/303/49              30 SSE AERO 29 SSE RMY N/A
02/10  42/33/38/+11/0.16/T/000/00          39 SSW AERO 39 SSW RMY 39
02/11  40/36/38/+11/0.21/0.0/000/00        24 W   AERO 23 W   RMY N/A
02/12  41/30/36/+9/0.00/0.0/314/50         37 W   AERO 36 W   RMY N/A
02/13  35/31/34/+6/0.58/0.5/000/00         29 SSW AERO 29 SSW RMY N/A
02/14  33/8/21/-7/0.00/0.0/506/80          32 WNW AERO 32 NW  RMY 34
02/15  27/4/16/-12/0.00/0.0/508/80         31 SSW AERO 31 SSW RMY N/A
02/16  40/23/32/+4/0.00/0.0/006/01         38 SW  AERO 38 SW  RMY N/A
02/17  44/28/36/+8/0.00/0.0/582/91         25 WNW AERO 24 WNW RMY 24
02/18  37/27/32/+3/0.31/T/000/00           26 SE  AERO 26 SE  RMY N/A
02/19  42/25/34/+5/0.00/0.0/530/82         45 W   AERO 46 W   RMY 44
02/20  31/18/25/-4/0.00/0.0/389/60         32 W   AERO 32 W   RMY N/A
02/21  30/11/21/-8/0.00/0.0/651/100        24 NNW AERO 21 N   RMY N/A
02/22  44/23/34/+5/0.00/0.0/647/99         26 W   AERO 24 W   RMY 27
02/23  53/30/42/+12/0.00/0.0/636/97        21 SW  AERO 22 WSW RMY 23
02/24  60/32/46/+16/0.00/0.0/606/92        29 S   AERO 29 SSW RMY 31
02/25  53/40/47/+17/0.19/0.0/033/05        17 NE  AERO 18 ENE RMY 17
02/26  45/39/42/+12/0.08/0.0/007/01        23 ENE AERO 24 E   RMY N/A
02/27  49/27/38/+7/0.73/0.0/274/41         51 W   AERO 53 W   RMY 52
02/28  36/25/31/0/0.00/0.0/596/89          38 SW  AERO 38 SW  RMY 36
02/29  35/19/27/-4/0.00/0.0/256/38         32 W   AERO 32 W   RMY 34

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  33/15/24/-7/0.00/0.0/…/..         28 WNW AERO 28 WNW RMY 27
03/02  52/24/38/+7/T/T/…/..              40 S   AERO 39 S   RMY 41
03/03  64/45/55/+23/…./0.0/…/..        30 S   AERO 30 S   RMY N/A
03/04  50/38/44/+12/…./0.0/…/..        56 W   AERO 56 W   RMY 58
03/05  51/32/42/+10/0.00/0.0/…/..        31 W   AERO 31 NW  RMY 32
03/06  47/30/39/+7/…./…/…/..         46 NE  AERO 45 NE  RMY 46
03/07  43/26/35/+2/…./…/…/..         42 N   AERO 43 N   RMY 44
03/08  53/26/40/+7/0.00/0.0/…/..         31 W   AERO 30 W   RMY 28
03/09  72/40/56/+23/0.00/0.0/…/..        32 SW  AERO 32 SW  RMY 31
03/10  68/49/59/+26/0.00/0.0/…/..        48 WSW AERO 46 WSW RMY 49
03/11  56/37/47/+13/0.00/0.0/…/..        31 WNW AERO M  M   RMY 21
03/12  46/31/39/+5/…./0.0/…/..         21 SE  AERO 18 SE  RMY N/A
03/13  59/38/49/+15/…./0.0/…/..        46 WNW AERO 44 WNW RMY 46
03/14  51/35/43/+8/0.00/0.0/…/..         37 W   AERO 36 W   RMY 35

03/15 The low since midnight is 33F, daily normal minimum is 26F

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

RECORDS FOR MARCH 15
HIGH 80 IN 1990
LOW 6 IN 1993
PRE 2.86 INS. IN 2010
SNOW 12.0 INS. 1967
WIND 73e MPH ESE IN 1940

RECORDS FOR MARCH 16
HIGH 73 IN 1990
LOW 8 IN 1932
PRE 1.95 INS. IN 1900
SNOW 10.0 INS. IN 1896
WIND 79 MPH NE IN 1956

TODAY’S REPORT PREPARED BY: Benjamin Turner

Category: Daily Discussions

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