Wednesday, January 2, 2019

| January 2, 2019 | Reply

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

DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, JANUARY 2, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

RETURN TO SEASONAL TEMPERATURES ON A CLEAR DAY…

Following an eventful day that bore witness to an exceptionally high
max temperature of 54 F in the morning hours, yesterday’s strong
northwesterly winds have produced temperatures that so far, appear
to be much more consistent with the seasonal expectation.  In contrast,
the strong winds have since died down, with light winds less than
10 KTS comprising the majority of the observation period.  Yesterday’s
wind speed totals proved to be impressive, with a daily average of
21.2 MPH and a peak gust of 53 MPH.  Additionally, speeds sustained
an hourly average of 30 MPH for the 12th hour of the day (11 A.M to
12 P.M.).  This prompted the return to seasonal temperatures, bottoming
out at 24 F at 7 A.M. this morning.  However, it should be noted that this
temperature still runs 5 degrees higher than the seasonal average
minimum of 19 F. Continuing yesterday’s trend, rising pressure has set
up a clear day with excellent visibility extending into the afternoon hours.

Today’s Observations:

7 A.M.
Weather: Scattered altocumulus
Temperature: 24F; Dew Point: 15F; Wind: NW at 8G15 kts
Sea-level pressure: 30.30 ins. Hg, rising slowly, then more quickly
Visibility: 50 miles
6-hr Max temp: 28F
6-hr Min temp: 24F
24-hr Precip: 0.00 ins.
24-hr snowfall: 0.0 ins.
Snow depth: 0 ins.
BHO SA 1155 E200 SCT 50 262/24/15/3208G15/030/ 8070/ 53034 10028 20024

10 A.M.
Weather: Few cirrus, few cirrostratus SE, few cirrocumulus SE, few distant
cumulus E
Temperature: 29F; Dew Point: 10F; Wind: N at 5 kts
Sea-level pressure: 30.35 ins. Hg, increasing, then more slowly
Visibility: 75 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 CLR 75 276/29/10/3505/035/ FEW CI FEW CC SE FEW CS SE
FEW DSNT CU E WND LGT/ 8109/ 51014

1 P.M.
Weather: Few cirrus, few cirrocumulus, few cirrostratus SE-SW,
few distant stratocumulus E-NE
Temperature: 34F; Dew Point: 3F; Wind: NNW at 4 kts
Sea-level pressure: 30.27 ins. Hg, decreasing, then increasing
Visibility: 80 miles
6-hr Max temp: 34F
6-hr Min temp: 24F
6-hr Precip: 0.00 ins.
6-hr snowfall: 0.0 ins.
Snow depth: 0 ins.
BHO SA 1755 CLR 80 253/34/03/3404/027/ FEW CI FEW CC FEW CS SE-SW
FEW DSNT SC E-NE WND LGT/ 8409/ 55009 10034 20024

SUMMARY FOR TUESDAY, JANUARY 1, 2019

TEMPERATURE (DEGREES F)
MAX…..54   NORMAL…..35
MIN…..29   NORMAL…..19
MEAN….42   NORMAL…..27

DEPARTURE FROM 30-YEAR NORMAL…………………..+15
TOTAL DEPARTURE FOR THE MONTH…………………..+15 [+14.8 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..23   DEPARTURE……..-15
TOTAL HEATING UNITS FOR THE MONTH…………..23   DEPARTURE……..-15
TOTAL HEATING UNITS FOR THE SEASON………..2343   DEPARTURE……..-24
TOTAL HEATING UNITS LAST SEASON TO DATE……2184   DIFFERENCE……+135

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..53 W AT 11:04 A.M.
AERO…………………….53 W AT 11:02 A.M.
ASOS…………………….53 W AT 11:05 A.M.
DAVIS……………………57 W AT 11:02 A.M. RMY 54
FASTEST MILE FOR YESTERDAY………………….44 W AT 11:04 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….39 W AT 11:08 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………43 W AT 11:08 A.M.
AVERAGE WIND SPEED AND DIRECTION…………..21.2 W
ASOS…………………..19.3
DAVIS………………….20.9 W [280 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE…….-0.14
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….0.81  DEPARTURE…….+0.66
ASOS…………..0.79
TOTAL PRECIPITATION FOR THE YEAR………..0.81  DEPARTURE…….+0.66
ASOS…………..0.79

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0  DEPARTURE……..-0.6
TOTAL SNOWFALL FOR THE MONTH…………….0.0  DEPARTURE……..-0.6
TOTAL SNOWFALL FOR THE SEASON……………7.7  DEPARTURE……..-8.9

PRELIMINARY CLIMATE SUMMARY FOR DECEMBER 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

12/01 41/28/35/-2/0.00/0.0/391/70           20 NNW AERO 18 NNW RMY N/A
12/02 52/35/44/+8/1.04/0.0/000/00          28 ESE AERO 25 ESE RMY 27
12/03 54/38/46/+10/0.00/0.0/178/32        35 W   AERO 35 W   RMY 38
12/04 38/23/31/-4/0.00/0.0/516/93           30 WNW AERO 31 WNW RMY 33
12/05 33/18/26/-9/0.00/0.0/432/78           16 NNW AERO 15 NNW RMY N/A
12/06 37/24/31/-4/0.00/0.0/354/64           29 W   AERO 28 W   RMY 30
12/07 37/21/29/-5/0.00/0.0/546/99           29 NW  AERO 29 NW  RMY 32
12/08 27/15/21/-13/0.00/0.0/518/94         28 NW  AERO 27 NW  RMY 29
12/09 34/17/26/-8/0.00/0.0/391/71           23 SSW AERO 21 SSW RMY 22
12/10 36/22/29/-4/0.00/0.0/544/99           24 NNW AERO 23 NNW RMY 22
12/11 36/17/27/-6/0.00/0.0/543/99           16 WSW AERO 14 WSW RMY N/A
12/12 35/18/27/-6/0.00/0.0/471/86           30 NW  AERO 29 NW  RMY M
12/13 31/16/24/-8/0.00/0.0/088/16           16 NNE AERO 12 SE  RMY N/A
12/14 46/28/37/+5/0.00/0.0/399/73           28 SSW AERO 28 SSW RMY 29
12/15 49/33/43/+11/0.04/0.0/000/00         28 NE  AERO 27 NE  RMY 30
12/16 40/37/39/+8/…./0.0/…/..                   38 NE  AERO 38 NE  RMY 40
12/17 37/32/35/+4/…./0.0/…/..                   39 NNE AERO 37 NNE RMY N/A
12/18 34/20/27/-4/0.02/0.1/…/..                 48 NW  AERO 55 NW  RMY 48
12/19 38/17/28/-2/0.00/0.0/…/..                 23 WNW AERO 23 WNW RMY N/A
12/20 47/30/39/+9/0.00/0.0/…/..                23 SW  AERO 22 SW  RMY N/A
12/21 62/43/53/+23/…./0.0/…/..                 60 SSE AERO 62 SSE RMY 63
12/22 54/31/43/+14/…./0.0/…/..                 41 W   AERO 45 W   RMY 43
12/23 38/27/33/+4/0.00/0.0/…/..                30 WNW AERO 32 WNW RMY N/A
12/24 34/27/31/+2/0.01/T/…/..                   21 W   AERO 21 W   RMY N/A
12/25 35/23/29/+1/0.00/0.0/…/..                28 NW  AERO 28 NW  RMY 29
12/26 36/20/28/0/0.00/0.0/…/..                  24 NW  AERO 24 NW  RMY 25
12/27 35/26/31/+3/0.00/0.0/…/..                23 NW  AERO 22 NW  RMY N/A
12/28 54/30/42/+14/…./0.0/…/..                 44 SSW AERO M  M   RMY 47
12/29 54/30/42/+15/…./…/…/..                   38 WNW AERO 38 WNW RMY 38
12/30 33/23/28/+1/0.00/0.0/…/..                24 NNW AERO 21 NNW RMY 17
12/31 41/28/35/+8/…./T/…/..                      33 SSE AERO 32 SSE RMY N/A

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 54/29/42/+15/…./0.0/…/..                 53 W   AERO 53 W   RMY 54

01/02 Low temp since midnight is 24F; normal low is 19F

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

RECORDS FOR JANUARY 2
HIGH 62F IN 1890
LOW -7F IN 1899,1918
PRECIP 2.10 INS. IN 1987
SNOWFALL 9.0 INS. IN 1904
PEAK GUST 85e MPH S IN 1942

RECORDS FOR JANUARY 3
HIGH 64F IN 2000
LOW -4F IN 1904
PRECIP 1.93 INS. IN 1999
SNOW 11.3 INS. 1996
PEAK GUST 92 MPH S IN 1960

TODAY’S REPORT PREPARED BY: Nate Iannuccillo

Category: Daily Discussions

Leave a Reply