Wednesday, February 5, 2020

| February 5, 2020 | Reply

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

DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, FEBRUARY 5, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

CLOUDY CONDITIONS FOLLOWING SOME ICING THIS MORNING….

Overnight rainfall was 0.08 inches, becoming ice pellets
and light glaze ice between 5 and 6 A.M. A trace of snowfall
was measured as a result. Clouds continue to dominate the sky,
but some breaks in the overcast were seen at the 1 P.M.
observation. Ponkapoag and Houghton’s Pond are half-covered
with ice, as the ski area struggles to keep its trails
covered in snow. Wind is northerly, being light for the
majority of the day. The max gust so far today is around
20 mph.

The high so far today is 37F, 2 degrees above the normal high
of 35F. The low since midnight 33F, 16 degrees above the normal
low of 17F.

PRELIMINARY STATS FOR JANUARY 2020

TEMPERATURE, Deg. F
Avg. Max. 40.6 [+6.8]
Avg. Min. 25.9 [+8.8]
Mean      33.3 [+7.8]
24-hour corrected mean: 32.8
Max. for month: 68F on the 12th
Min. for month: 8F on the 18th

HEATING DEGREE DAYS
Total heating units:    978 [-248]
Total for the season:  3229 [-302]
Total for last season: 3495

PRECIPITATION, Inches
Total: 1.46 [-2.89]
Greatest in 24 hrs: N/A

SNOWFALL, Inches
Total: 4.2 [-12.9]
Greatest in 24 hrs: 3.0 ins. on the 18th-19th

WIND, mph
Avg. uncorrected wind speed: 12.3 mph
Avg. corrected wind speed:   12.8 mph
Prevailing wind direction:   W [19%]
Peak gust and direction:     60 SSW on the 12th

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

JANUARY 2020 RANKED 9TH WARMEST ON RECORD!
Warmest 24-Hour Adjusted Mean Temperature, deg F (1886-2020):

1) 35.6 in 1913
2) 35.0 in 1932
3) 34.6 in 1937
4) 33.9 in 2006
5) 33.8 in 1933
33.8 in 1950
33.8 in 1990
8) 33.5 in 2002
9) 32.8 in 2020
10) 32.7 in 2017

Today’s Observations:

7 A.M.
Weather: Overcast altostratus, few stratus fractus,
thin glaze ice on exposed surfaces
Temperature: 33F; Dew Point: 33F; Wind: N at 5 kts,
Wind: Light
Sea-level pressure: 29.92 ins. Hg: rising, then more slowly
Visibility: 30 miles, distant fog
6-hr Max temp: 41F
6-hr Min temp: 33F
24-hr Precip:  0.08 ins.
24-hr Snowfall: Trace
BHO SA 1155 E70 OVC 30 133/33/33/0105/992/ FEW STFA DSNT FG
ALQDS THN GLZ NEW SNOW PST 24 HRS TRACE WND LGT/ 8/72/ 70008
53019 10041 20033

10 A.M.
Weather: Broken cumulus/stratocumulus, overcast
altostratus
Temperature: 36F; Dew Point: 28F; Wind: NNW at 9G15 kts,
Sea-level pressure: 30.01 ins. Hg: falling then rising
Visibility: 70 miles
3-hr Precip:   0.00 ins.
3-hr Snowfall:  0.0 ins.
BHO SA 1455 E40 BKN 110 OVC 70 164/36/28/3409G15/001/ 8/82/
51031

1 P.M.
Weather: Scattered cumulus/stratocumulus, broken
altocumulus/altostratus, broken cirrostratus
Temperature: 37F; Dew Point: 23F; Wind: NW at 7 kts
Sea-level pressure: 30.02 ins. Hg: rising steadily
Visibility: 85 miles
6-hr Max temp: 37F
6-hr Min temp: 33F
6-hr Precip:  0.00 ins.
6-hr Snowfall: 0.0 ins.
BHO SA 1755 E40 SCT 110 BKN 230 BKN 85 166/37/23/3207/002/ 8/875
53002 10037 20033

SUMMARY FOR TUESDAY, FEBRUARY 4, 2020

TEMPERATURE (DEGREES F)
MAX…..44   NORMAL…..35
MIN…..33   NORMAL…..17
MEAN….39   NORMAL…..26

DEPARTURE FROM 30-YEAR NORMAL………………..+13
TOTAL DEPARTURE FOR THE MONTH………………..+40 [+9.8 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………26  DEPARTURE…….-13
TOTAL HEATING UNITS FOR THE MONTH…………..116  DEPARTURE…….-40
TOTAL HEATING UNITS FOR THE SEASON…………3345  DEPARTURE……-342
TOTAL HEATING UNITS LAST SEASON TO DATE…….3645  DEPARTURE……-300

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..19 E   AT  7:07 P.M.
AERO…………………….16 E   AT  7:04 A.M.
ASOS…………………….19 E   AT  7:09 A.M.
DAVIS……………………19 E   AT  7:05 A.M. RMY 18
FASTEST MILE FOR YESTERDAY………………….14 E   AT  7:10 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….15 E   AT  7:11 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………15 E   AT  7:08 A.M.
AVERAGE WIND SPEED AND DIRECTION……………7.3 E
ASOS……………………7.5
DAVIS…………………..7.8 NW [313 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.08  DEPARTURE……-0.06
ASOS…………..0.08
TOTAL PRECIPITATION FOR THE MONTH……….0.09  DEPARTURE……-0.45
ASOS…………..0.11
TOTAL PRECIPITATION FOR THE YEAR………..1.55  DEPARTURE……-3.34
ASOS…………..1.65

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……..Trace  DEPARTURE…….-0.5
TOTAL SNOWFALL FOR THE MONTH…………..Trace  DEPARTURE…….-2.0
TOTAL SNOWFALL FOR THE SEASON…………..24.2  DEPARTURE……-10.9

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/+8/0.01/T/…./..          14 WSW AERO 14 WSW RMY N/A
02/02  40/30/35/+9/0.00/0.0/…./..        18 W   AERO 18 WNW RMY 18
02/03  44/27/36/+10/0.00/0.0/…./..       28 W   AERO 28 W   RMY 28
02/04  44/33/39/+13/0.00/0.0/…./..       19 E   AERO 16 E   RMY 18

02/05 The low since midnight is 33F, 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 5
HIGH 65F IN 1991
LOW -14F IN 1918
PRECIP 1.55 INS. IN 2001
SNOWFALL 16.0 INS. IN 1907
PEAK GUST 67 MPH WNW IN 1969

RECORDS FOR FEBRUARY 6
HIGH 54F IN 1909
LOW -10F IN 1895
PRECIP 1.88 INS. IN 1896
SNOWFALL 13.0 INS. IN 1978 [BLIZZARD OF 1978]
PEAK GUST 84e MPH NE IN 1978

TODAY’S REPORT PREPARED BY: Benjamin Turner

Category: Daily Discussions

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