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Sunday, April 5, 2020

April 6, 2020

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SUNDAY, APRIL…

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, APRIL 5, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

OVERCAST WITH A LIGHT SOUTHEASTERLY WIND
AND A DISTANT HAZE….

Today began overcast, with some breaks of sunshine
in the afternoon. Visibility was limited, only
reaching 35 miles due to a distant haze. Wind was
southeasterly with a constant speed under 10 mph.
The max gust so far today is 16 mph.

Our high temperature so far today is 52F, which is a degree
above our daily normal high temperature of 51F. The low
since midnight is 36F, which is 2 degrees above the daily
normal low of 34F.

PRELIMINARY STATS FOR MARCH 2020

TEMPERATURE, Deg. F
Avg. Max. 49.8 [+5.5] Avg. Min. 32.3 [+5.7] Mean      41.4 [+5.9] 24-hour corrected mean: 40.5
Max. for month: 72F on the 9th
Min. for month: 15F on the 1st

HEATING DEGREE DAYS
Total heating units:    733 [-183] Total for the season:  4873 [-611] Total for last season: 5432

PRECIPITATION, Inches
Total: 4.67 [-0.91] Greatest in 24 hrs: N/A

SNOWFALL, Inches
Total: 2.8 [-9.9] Greatest in 24 hrs: N/A

WIND, mph
Avg. uncorrected wind speed: 12.6 mph
Avg. corrected wind speed:   12.9 mph
Prevailing wind direction:   W [12%] Peak gust and direction:     56 W on the 4th

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

Today’s Observations:

7 A.M.
Weather: Overcast stratus
Temperature: 39F; Dew Point: 34F; Relative Humidity: 80%
Wind: SSE at 7 kts
Sea-level pressure: 30.09 ins. Hg: rising steadily
Visibility: 30 miles, distant haze
6-hr Max temp: 39F
6-hr Min temp: 36F
24-hr Precip:  0.00 ins.
24-hr Snowfall: 0.0 ins.
BHO SA 1155 E40 OVC 30 188/39/34/1607/009/ DSNT HZ ALQDS/
8/6// 53013 10039 20036

10 A.M.
Weather: Overcast stratus
Temperature: 49F; Dew Point: 34F; Relative Humidity: 55%
Wind: SSE at 7 kts
Sea-level pressure: 30.09 ins. Hg: rising steadily
Visibility: 35 miles, distant haze
3-hr Precip:  0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 E40 OVC 35 189/49/34/1607/009/ DSNT HZ ALQDS/
8/6// 50001

1 P.M.
Weather: Broken stratocumulus
Temperature: 52F; Dew Point: 37F; Relative Humidity: 56%
Wind: SSE at 7 kts
Sea-level pressure: 30.05 ins. Hg: rising then falling
Visibility: 35 miles, distant haze
6-hr Max temp: 52F
6-hr Min temp: 39F
6-hr Precip:  0.00 ins.
6-hr Snowfall: 0.0 ins.
BHO SA 1755 E50 BKN 35 175/52/37/1607/005/ DSNT HZ ALQDS/
8/400 58014 10052 20039

SUMMARY FOR SATURDAY, APRIL 4, 2020

TEMPERATURE (DEGREES F)
MAX…..46   NORMAL…..51
MIN…..36   NORMAL…..33
MEAN….41   NORMAL…..42

DEPARTURE FROM 30-YEAR NORMAL………………..-1
TOTAL DEPARTURE FOR THE MONTH………………..-9 [-2.5 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………24  DEPARTURE……..+1
TOTAL HEATING UNITS FOR THE MONTH…………..103  DEPARTURE……..+9
TOTAL HEATING UNITS FOR THE SEASON…………4976  DEPARTURE……-602
TOTAL HEATING UNITS LAST SEASON TO DATE…….5497  DEPARTURE……-521

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..38 NE  AT  2:18 A.M.
AERO…………………….38 NE  AT  2:19 A.M
ASOS…………………….39 NNE AT  2:17 A.M.
DAVIS……………………38 ENE AT  2:01 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY………………….27 NE  AT  2:16 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….25 NE  AT  2:17 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………28 NE  AT  2:16 A.M.
AVERAGE WIND SPEED AND DIRECTION…………..11.9 NE
ASOS…………………..12.2
DAVIS………………….12.1 ENE [62 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……….2.72  DEPARTURE……+2.04
ASOS…………..2.82
TOTAL PRECIPITATION FOR THE YEAR……….12.05  DEPARTURE……-2.63
ASOS………….12.55

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0  DEPARTURE…….-0.2
TOTAL SNOWFALL FOR THE MONTH…………….0.0  DEPARTURE…….-0.8
TOTAL SNOWFALL FOR THE SEASON…………..27.6  DEPARTURE……-32.9

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/-7/0.00/0.0/676/100        28 WNW AERO 28 WNW RMY 27
03/02  52/24/38/+7/T/T/482/71              40 S   AERO 39 S   RMY 41
03/03  64/45/55/+23/…./0.0/361/53        30 S   AERO 30 S   RMY N/A
03/04  50/38/44/+12/…./0.0/561/82        56 W   AERO 56 W   RMY 58
03/05  51/32/42/+10/0.00/0.0/666/97        31 W   AERO 31 NW  RMY 32
03/06  47/30/39/+7/…./…/283/41         46 NE  AERO 45 NE  RMY 46
03/07  43/26/35/+2/…./…/534/77         42 N   AERO 43 N   RMY 44
03/08  53/26/40/+7/0.00/0.0/508/73         31 W   AERO 30 W   RMY 28
03/09  72/40/56/+23/0.00/0.0/685/98        32 SW  AERO 32 SW  RMY 31
03/10  68/49/59/+26/0.00/0.0/246/35        48 WSW AERO 46 WSW RMY 49
03/11  56/37/47/+13/0.00/0.0/501/71        31 WNW AERO M  M   RMY 21
03/12  46/31/39/+5/…./0.0/156/22         21 SE  AERO 18 SE  RMY N/A
03/13  59/38/49/+15/…./0.0/000/00        46 WNW AERO 44 WNW RMY 46
03/14  51/35/43/+8/0.00/0.0/613/86         37 W   AERO 36 W   RMY 35
03/15  47/28/38/+3/0.00/0.0/680/95         28 NW  AERO 28 NW  RMY N/A
03/16  36/22/29/-6/0.00/0.0/618/86         21 NE  AERO 21 ESE RMY 21
03/17  43/28/36/0/…./0.4/000/00          29 W   AERO 30 W   RMY 29
03/18  54/31/43/+7/…./0.0/609/84         26 S   AERO 26 S   RMY 26
03/19  43/37/40/+4/…./0.0/000/00         36 E   AERO 35 E   RMY 34
03/20  66/37/52/+15/…./0.0/000/00        48 W   AERO 48 W   RMY 46
03/21  55/29/42/+5/0.00/0.0/535/73         45 W   AERO 48 W   RMY N/A
03/22  36/23/30/-7/0.00/0.0/692/94         23 NE  AERO 24 NE  RMY 23
03/23  40/25/33/-5/…./1.6/037/05         38 NNE AERO 39 NNE RMY 38
03/24  48/33/41/+3/…./…/148/20         37 NNW AERO 37 NNW RMY N/A
03/25  41/35/38/0/0.03/0.0/000/00          28 ENE AERO 28 ENE RMY 27
03/26  51/30/41/+2/…./0.0/613/82         25 SSE AERO 26 SSW RMY N/A
03/27  61/41/51/+12/…./0.0/…/..        32 NW  AERO M  M   RMY 33
03/28  56/36/46/+7/…./0.0/…/..         22 S   AERO 21 E   RMY N/A
03/29  43/37/40/0/…./0.0/…/..          32 NE  AERO 33 NE  RMY 33
03/30  40/34/37/-3/…./0.0/…/..         33 NE  AERO 33 NE  RMY 33
03/31  40/29/35/-6/…./0.0/…/..         28 ENE AERO 26 ENE RMY N/A

PRELIMINARY CLIMATE SUMMARY FOR APRIL 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

04/01  42/28/35/-6/0.00/0.0/…/..         28 NE  AERO 28 NE  RMY 30
04/02  46/35/41/0/…/0.0/…/..           39 NW  AER0 40 NW  RMY 41
04/03  42/38/40/-2/…./0.0/…/..         48 NE  AERO 53 NE  RMY 49
01/04  46/36/41/-1/…./0.0/…/..         38 NE  AERO 38 NE  RMY N/A

04/05 The low since midnight is 36F, daily normal minimum is 34F

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

RECORDS FOR APRIL 5
HIGH 81 IN 1928
LOW 15 IN 1995
PRECIP 2.15 IN. IN 1987
SNOWFALL 4.0 IN. IN 1898
PEAK GUST 76 MPH WNW IN 1963

RECORDS FOR APRIL 6
HIGH 82 IN 1921
LOW 16 IN 1982
PRE 1.72 INS IN 1886
SNOW 12.3 INS IN 1982
WIND 71e MPH WNW IN 1940

TODAY’S REPORT PREPARED BY: Benjamin Turner

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