Sunday, February 2, 2020

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, FEBRUARY 2, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

MILD AND CLOUDY WITH LIMITED VISIBILITY
FOLLOWING SOME LIGHT SNOW OVERNIGHT….

Today we observed overcast skies as low clouds continue to
dominate the region. Visibility was limited due to fog,
being 5 miles in the morning and 35 miles in the afternoon.
Wind was light throughout the day, coming in from the
northwest.

Despite abundant cloud cover and slight cold air advection
from the northwest, we are still seeing milder than normal
temperatures. This is due in part to an encroaching warm
air mass to our south. The high so far today is 38F, 3 degrees
above the normal high of 35F. The low since midnight is 31F,
14 degrees below the normal low of 17F.

Today’s Observations:

7 A.M.
Weather: Overcast stratocumulus
Temperature: 31F; Dew Point: 30F; Wind: NNW at 7 kts
Sea-level pressure: 29.59 ins. Hg: falling steadily
Visibility: 5 miles, fog
6-hr Max temp: 32F
6-hr Min temp: 31F
24-hr Precip:  0.00 ins.
24-hr Snowfall: 0.0 ins.
BHO SA 1155 E45 OVC 5F 002/31/30/3407/959/ 8/6//
56005 10032 20031

10 A.M.
Weather: Overcast stratocumulus
Temperature: 34F; Dew Point: 28F; Wind: WNW at 4 kts,
Wind: Light and variable
Sea-level pressure: 29.59 ins. Hg: steady
Visibility: 25 miles, distant fog
3-hr Precip:   0.00 ins.
3-hr Snowfall:  0.0 ins.
BHO SA 1455 E40 OVC 25 002/34/28/3004/959/ DSNT FG
ALQDS WND L/V/ 8/8// 50000

1 P.M.
Weather: Overcast stratocumulus
Temperature: 37F; Dew Point: 25F; Wind: W at 9 kts
Sea-level pressure: 29.52 ins. Hg: falling, then falling more rapidly
Visibility: 35 miles, distant haze
6-hr Max temp: 38F
6-hr Min temp: 31F
6-hr Precip:  0.00 ins.
6-hr Snowfall: 0.0 ins.
BHO SA 1755 E40 OVC 35 981/37/25/2809/952/ DSNT HZ ALQDS/ 8/8// 56021
10038 20031

SUMMARY FOR SATURDAY, FEBRUARY 1, 2020

TEMPERATURE (DEGREES F)
MAX…..38   NORMAL…..34
MIN…..30   NORMAL…..17
MEAN….34   NORMAL…..26

DEPARTURE FROM 30-YEAR NORMAL…………………+8
TOTAL DEPARTURE FOR THE MONTH…………………+8 [+7.8 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………31  DEPARTURE……..-8
TOTAL HEATING UNITS FOR THE MONTH……………31  DEPARTURE……..-8
TOTAL HEATING UNITS FOR THE SEASON…………3260  DEPARTURE……-310
TOTAL HEATING UNITS LAST SEASON TO DATE…….3548  DEPARTURE……-288

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..14 WSW AT 12:17 A.M.
AERO…………………….14 WSW AT 12:17 A.M.
ASOS…………………….12 SW  AT 12:16 A.M.
DAVIS……………………11 SW  AT 12:13 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY………………….8  WSW AT 12:20 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….9  SW  AT 12:23 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………9  SW  AT 12:16 A.M.
AVERAGE WIND SPEED AND DIRECTION…………..4.0 NW
ASOS…………………..4.3
DAVIS………………….4.0 W [264 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……….1.46  DEPARTURE……-0.13
ASOS…………..1.54
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…………….0.0  DEPARTURE…….-0.5
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

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 The low since midnight is 31F, daily normal minimum is 17F

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.

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

RECORDS FOR FEBRUARY 2
HIGH 55F IN 1951, 1973
LOW -12F IN 1961
PRECIP 1.91 INS. IN 1999
SNOWFALL 16.5 INS. IN 2015
PEAK GUST 92 MPH SW IN 1970

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]

TODAY’S REPORT PREPARED BY: Benjamin Turner