Monday, February 3, 2020

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

DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, FEBRUARY 3, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

ABOVE NORMAL TEMPERATURES, BELOW NORMAL PRECIP CONTINUES….

After a period of sun this morning, clouds have once again
taken over. However these clouds are not bringing any rain
or snow with them, as such our precipitation and snowfall
deficits continue to grow. We are currently running 3.01″
below normal for the year to date for precipitation, and
9.4″ below normal for our seasonal snowfall to date.

A gusty wind has developed early this afternoon out of the
west, gusting to 25-30mph at times.

Visibility was limited to around 35 miles most of the morning
with hazy conditions, however the air has cleared considerably
early this afternoon. Visibility has improved to around 60
miles by 1 P.M.

Despite the abundant cloud cover, the temperature has risen
into the low to mid 40s today. The high so far today is 44F,
9 degrees above the normal high of 35F. The low since midnight
is 27F, 10 degrees above the normal low of 17F.

Today’s Observations:

7 A.M.
Weather: Broken altocumulus, few cumulus distant E
Temperature: 30F; Dew Point: 26F; Wind: W at 7 kts
Sea-level pressure: 29.70 ins. Hg: rising, then more rapidly
Visibility: 35 miles, hazy
6-hr Max temp: 30F
6-hr Min temp: 27F
24-hr Precip:  0.00 ins.
24-hr Snowfall: 0.0 ins.
BHO SA 1155 E65 BKN 35 058/30/26/2807/970/ FEW CU DSNT E HAZY/
8/270 53041 10030 20027

10 A.M.
Weather: Clear, few altocumulus all quadrants
Temperature: 39F; Dew Point: 27F; Wind: W at 6 kts,
Sea-level pressure: 29.77 ins. Hg: rising, then more slowly
Visibility: 35 miles, hazy
3-hr Precip:   0.00 ins.
3-hr Snowfall:  0.0 ins.
BHO SA 1455 CLR 35 081/39/27/2806/977/ FEW AC ALQDS HAZY WND LGT/
8/070 51023

1 P.M.
Weather: Broken stratocumulus, virga distant S-SW
Temperature: 43F; Dew Point: 27F; Wind: W at 13G20 kts
Sea-level pressure: 29.78 ins. Hg: rising, then falling
Visibility: 60 miles
6-hr Max temp: 44F
6-hr Min temp: 30F
6-hr Precip:  0.00 ins.
6-hr Snowfall: 0.0 ins.
BHO SA 1755 E45 BKN 60 085/43/27/2713G20/978/ VIRGA DSNT S-SW/
8/500 50004 10044 20030

SUMMARY FOR SUNDAY, FEBRUARY 2, 2020

TEMPERATURE (DEGREES F)
MAX…..40   NORMAL…..35
MIN…..30   NORMAL…..17
MEAN….35   NORMAL…..26

DEPARTURE FROM 30-YEAR NORMAL…………………+9
TOTAL DEPARTURE FOR THE MONTH………………..+17 [+8.3 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………30  DEPARTURE……..-9
TOTAL HEATING UNITS FOR THE MONTH……………61  DEPARTURE…….-17
TOTAL HEATING UNITS FOR THE SEASON…………3290  DEPARTURE……-319
TOTAL HEATING UNITS LAST SEASON TO DATE…….3594  DEPARTURE……-304

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..18 W   AT  7:58 P.M.
AERO…………………….18 WNW AT  1:23 P.M.
ASOS…………………….19 W   AT  7:54 P.M.
DAVIS……………………18 WNW AT  1:50 P.M. RMY 18
FASTEST MILE FOR YESTERDAY………………….14 W   AT  7:45 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….14 W   AT  8:20 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………15 W   AT  7:57 P.M.
AVERAGE WIND SPEED AND DIRECTION………….. 7.3 W
ASOS………………….. 7.5
DAVIS…………………. 7.7 WNW [297 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE……-0.13
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….0.01  DEPARTURE……-0.25
ASOS…………..0.03
TOTAL PRECIPITATION FOR THE YEAR………..1.47  DEPARTURE……-3.01
ASOS…………..1.57

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0  DEPARTURE…….-0.5
TOTAL SNOWFALL FOR THE MONTH…………..Trace  DEPARTURE…….-1.0
TOTAL SNOWFALL FOR THE SEASON…………..24.2  DEPARTURE…….-9.4

PRELIMINARY CLIMATE SUMMARY FOR JANUARY 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

01/01  38/30/34/+7/…./0.0/400/73           39 W   AERO 38 W   RMY 41
01/02  46/29/38/+11/0.00/0.0/269/49          28 SW  AERO 28 SW  RMY 30
01/03  46/40/43/+17/0.00/0.0/000/00          21 SW  AERO 18 SW  RMY N/A
01/04  46/36/41/+15/…./0.0/000/00          16 NNW AERO 16 NNW RMY N/A
01/05  36/24/30/+4/…./0.5/116/21           43 NW  AERO 46 NW  RMY 43
01/06  33/23/28/+2/T/T/133/24                26 W   AERO 21 W   RMY N/A
01/07  38/29/34/+8/…./0.4/161/29           30 WSW AERO 28 WSW RMY N/A
01/08  39/22/31/+5/…./0.4/350/63           50 W   AERO 46 WNW RMY 47
01/09  28/16/22/-4/…./0.0/540/97           43 WNW AERO 40 WNW RMY N/A
01/10  48/23/36/+11/T/…./0.0/106/19        37 SW  AERO 37 SW  RMY 39
01/11  65/46/56/+31/…./0.0/408/73          53 SSW AERO 53 SSW RMY N/A
01/12  68/36/52/+27/…./0.0/297/53          60 SSW AERO 62 SSW RMY N/A
01/13  39/31/35/+10/0.01/T/000/00            21 NE  AERO 20 NE  RMY N/A
01/14  38/31/35/+10/0.01/0.0/000/00          16 W   AERO 15 W   RMY N/A
01/15  48/35/42/+17/0.00/0.0/503/89          24 W   AERO 23 W   RMY 24
01/16  42/24/33/+8/0.06/T/142/25             54 W   AERO 52 W   RMY 59
01/17  24/10/17/-8/0.00/0.0/552/97           50 NW  AERO 48 NW  RMY N/A
01/18  28/8/18/-7/0.35/2.8/000/00            28 WSW AERO 24 ESE RMY N/A
01/19  40/21/31/+6/0.02/0.2/332/58           44 W   AERO 44 W   RMY 42
01/20  26/12/19/-6/0.00/0.0/442/77           33 NW  AERO 32 NW  RMY N/A
01/21  24/10/17/-8/0.00/0.0/472/82           22 NW  AERO 21 NW  RMY N/A
01/22  34/13/24/-1/0.00/0.0/566/98           16 SW  AERO 16 SW  RMY N/A
01/23  46/26/36/+11/0.00/0.0/348/60          21 SW  AERO 20 SW  RMY 19
01/24  44/31/38/+13/0.00/0.0/524/90          21 ENE AERO 17 ENE RMY N/A
01/25  50/36/43/+18/0.57/0.0/…./..         41 ESE AERO 41 ESE RMY 40
01/26  49/35/42/+17/0.00/0.0/…./..         33 W   AERO 31 W   RMY 32
01/27  43/33/38/+13/0.00/0.0/…./..         30 W   AERO 29 W   RMY 29
01/28  37/30/34/+9/0.00/0.0/…./..          25 NW  AERO 25 NW  RMY 27
01/29  38/23/31/+6/0.00/0.0/…./..          24 N   AERO 23 N   RMY 24
01/30  34/16/25/-1/0.00/0.0/…./..          17 NNW AERO 16 NNW RMY N/A
01/31  43/24/34/+8/0.00/0.0/…./..          22 S   AERO 21 S   RMY 22

DAILY RECORDS FOR JANUARY

1/11/20: DAILY RECORD MAXIMUM TEMPERATURE OF 65F,
BREAKS PREVIOUS RECORD OF 60F SET IN 1975.

1/11/20: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 46F,
BREAKS PREVIOUS RECORD OF 40F SET IN 1983.

1/12/20: DAILY RECORD MAXIMUM TEMPERATURE OF 68F,
BREAKS PREVIOUS RECORD OF 60 SET IN 2018.
TIES HIGHEST MAXIMUM TEMPERATURE FOR JANUARY,
MATCHES 68F SET ON 1/26/1950.

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/+8/31/0.01/T/…./..          14 WSW AERO 14 WSW RMY N/A
02/02  40/30/35/+9/30/0.00/0.0/…./..        18 W   AERO 18 WNW RMY 18

02/03 The low since midnight is 27F, daily normal minimum is 17F

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

RECORDS FOR FEBRUARY 3
HIGH 58F IN 1991
LOW -7F IN 1955
PRECIP 2.14 INS. IN 1970
SNOWFALL 7.0 INS. IN 1913
PEAK GUST 102 MPH S IN 1970 [RECORD FOR MONTH]

RECORDS FOR FEBRUARY 4
HIGH 63F IN 1991
LOW -4F IN 1886, 1908
PRECIP 1.80 INS. IN 1926
SNOWFALL 15.0 INS. IN 1961
PEAK GUST 89 MPH SSE IN 1972

TODAY’S REPORT PREPARED BY: Matt Douglas