Saturday, March 14, 2020

| March 14, 2020 | Reply

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, MARCH 14, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

AN INCREASINGLY CLOUDY DAY WITH A COOL
WESTERLY BREEZE….

Today we observed clear conditions this morning, with an
increase of clouds throughout the day. This is following
some rainy weather yesterday, that left 0.11 inches in
the gauge by 1 P.M. Wind is westerly, with a max gust
of 35 mph being seen so far. Skies were overcast by
noontime, but the pressure is still trending slightly upward;
indicating the approach of some upper-level moisture.

The high so far today is 51F, this is 7 degrees above the
normal high of 44F. The low since midnight is 35F, this is
9 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: Few cumulus SW-NNW
Temperature: 36F; Dew Point: 23F; Relative Humidity: 57%
Wind: W at 17G33 kts
Sea-level pressure: 30.14 ins. Hg: rising steadily
Visibility: 75 miles
6-hr Max temp: 39F
6-hr Min temp: 35F
24-hr Precip:  0.11 ins.
24-hr Snowfall: 0.0 ins.
BHO SA 1155 CLR 75 207/36/23/2614G24/014/ FEW CU SW-NNW/ 8/100
70011 51021 10039 20035

10 A.M.
Weather: Scattered cirrostratus, few cumulus
Temperature: 45F; Dew Point: 22F; Relative Humidity: 40%
Wind: W at 16G18 kts
Peak Wind: SSE at 32 kts (37 MPH) at 9:44 A.M.
Sea-level pressure: 30.17 ins. Hg: rising steadily
Visibility: 75 miles, fog
3-hr Precip:  0.05 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 250 SCT 75 217/45/22/2716G18/017/ FEW CU ALQDS PK WND
2732/1344/ 8/108 51010

1 P.M.
Weather: Scattered cumulus, broken cirrostratus
Temperature: 50F; Dew Point: 26F; Relative Humidity: 38%
Wind: W at 11G22 kts
Peak Wind: W at 29 kts (34 MPH) at 11:06 P.M.
Sea-level pressure: 30.18 ins. Hg: rising slowly
Visibility: 80 miles
6-hr Max temp: 51F
6-hr Min temp: 36F
6-hr Precip:  0.00 ins.
6-hr Snowfall: 0.0 ins.
BHO SA 1755 50 SCT E250 BKN 80 221/50/26/2811G22/018/ PK WND 2729/1606/
8/108 51004 10051 20036

SUMMARY FOR FRIDAY, MARCH 13, 2020

TEMPERATURE (DEGREES F)
MAX…..59   NORMAL…..43
MIN…..38   NORMAL…..26
MEAN….49   NORMAL…..34

DEPARTURE FROM 30-YEAR NORMAL……………….+15
TOTAL DEPARTURE FOR THE MONTH………………+143 [+10.8 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………16  DEPARTURE…….-15
TOTAL HEATING UNITS FOR THE MONTH…………..278  DEPARTURE……-142
TOTAL HEATING UNITS FOR THE SEASON…………4418  DEPARTURE……-570
TOTAL HEATING UNITS LAST SEASON TO DATE…….4962  DEPARTURE……-544

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..46 WNW AT   4:27 P.M.
AERO…………………….44 WNW AT   4:27 P.M.
ASOS…………………….51 WNW AT   4:26 P.M.
DAVIS……………………46 S   AT  12:28 P.M. RMY 46
FASTEST MILE FOR YESTERDAY………………….35 W   AT  10:52 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….32 W   AT  10:53 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………35 W   AT  10:53 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..18.4 WNW
ASOS…………………..17.9
DAVIS………………….18.2 SSW [205 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.11  DEPARTURE……-0.05
ASOS…………..0.17
TOTAL PRECIPITATION FOR THE MONTH……….0.26  DEPARTURE……-1.87
ASOS…………..0.29
TOTAL PRECIPITATION FOR THE YEAR………..4.92  DEPARTURE……-5.63
ASOS…………..5.20

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0  DEPARTURE…….-0.5
TOTAL SNOWFALL FOR THE MONTH…………….0.8  DEPARTURE…….-5.7
TOTAL SNOWFALL FOR THE SEASON…………..25.6  DEPARTURE……-27.9

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/T/055/09             19 E   AERO 16 E   RMY 18
02/05  41/30/36/+10/0.08/0.0/000/00        20 NNW AERO 19 NNW RMY N/A
02/06  31/30/34/+8/0.56/0.0/000/00         29 E   AERO 28 E   RMY 27
02/07  53/25/39/+12/0.29/0.1/000/00        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 The low since midnight is 35F, 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 14
HIGH 74 IN 1946
LOW 8 IN 1926
PRECIP 4.95 INS. IN 2010
SNOWFALL 7.3 INS. IN 2017
PEAK GUST 67 MPH ENE IN 2010

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

TODAY’S REPORT PREPARED BY: Benjamin Turner

Category: Daily Discussions

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