Wednesday, January 23, 2019

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

DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, JANUARY 23, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

OVERCAST AND WARMER WITH WIND BECOMING MORE
SIGNIFICANT IN THE AFTERNOON….

We observed overcast conditions for most of the day,
with a pressure drop of almost 6 millibars during the
observation period. Wind from the southwest increased
significantly throughout the day, with a max gust so
far of 35 MPH slightly before 1 P.M. In contrast to
the colder conditions over the weekend, temperatures
today were much closer to seasonal averages. The high so
far today is 36F, 3 degrees above the daily normal
of 33F. The low since midnight is 15F, 2 degrees under
the normal minimum of 17F.
Today’s Observations:

7 A.M.
Weather: Overcast cirrostratus
Temperature: 21F; Dew Point: 14F; Wind: SSW at 19G22 kts
Sea-level pressure: 30.37 ins. Hg, falling, then more rapidly
Visibility: 40 miles, thin smoke layer in all directions
6-hr Max temp: 21F
6-hr Min temp: 15F
24-hr Precip: 0.00 in.
24-hr snowfall: 0.0
Snow depth: 3 ins.
BHO SA 1155 E250 OVC 40 283/21/14/2019G22/037/ THN K
LYR ALQDS/ 8/006 4/003 56023 10021 20015

10 A.M.
Weather: Overcast stratocumulus
Temperature: 29F; Dew Point: 23F; Wind: SSW at 11G24 kts,
Peak wind: 32 MPH (28 kts) SSW at 9:40 A.M.
Sea-level pressure: 30.32 ins. Hg, falling, then more rapidly
Visibility: 70 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 E55 OVC 70 268/29/23/2018G24/032/ PK WND
2028/40/ 8/6// 58015

1 P.M.
Weather: Overcast stratocumulus
Temperature: 36F; Dew Point: 26F; Wind: SSW at 21G30 kts,
Peak wind: 35 MPH (30 kts) SSW at 12:55 P.M.
Sea-level pressure: 30.19 ins. Hg, falling rapidly
Visibility: 40 miles
6-hr Max temp: 36F
6-hr Min temp: 21F
6-hr Precip: 0.00 ins.
6-hr snowfall: 0.00 ins.
Snow depth: 3 ins.
BHO SA 1755 E55 OVC 40 225/36/26/2021G30/019/ PK WND
2030/55/ 8/6// 58043 10036 20021

SUMMARY FOR TUESDAY, JANUARY 22, 2019

TEMPERATURE (DEGREES F)
MAX…..24   NORMAL…..33
MIN…..0    NORMAL…..17
MEAN….12   NORMAL…..25

DEPARTURE FROM 30-YEAR NORMAL…………………..-13
TOTAL DEPARTURE FOR THE MONTH…………………..+10 [+0.3 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..53   DEPARTURE……..+13
TOTAL HEATING UNITS FOR THE MONTH………….859   DEPARTURE……..-10
TOTAL HEATING UNITS FOR THE SEASON………..3155   DEPARTURE……..-18
TOTAL HEATING UNITS LAST SEASON TO DATE……3015   DIFFERENCE……+140

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..28 NW  AT 10:23 A.M.
AERO…………………….30 NW  AT 10:21 A.M.
ASOS…………………….35 NW  AT  1:31 A.M.
DAVIS……………………22 NW  AT  2:13 P.M.
FASTEST MILE FOR YESTERDAY………………….24 WNW AT  7:20 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….23 WNW AT  6:45 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………17 NW  AT  3:09 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..12.3 WNW
ASOS…………………..14.1
DAVIS………………….6.1 WNW [298 deg.]*
*Davis reading low

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……….3.66  DEPARTURE…….+0.54
ASOS…………..3.67
TOTAL PRECIPITATION FOR THE YEAR………..3.66  DEPARTURE…….+0.54
ASOS…………..3.67

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0  DEPARTURE……..-0.6
TOTAL SNOWFALL FOR THE MONTH…………….4.2  DEPARTURE……..-8.1
TOTAL SNOWFALL FOR THE SEASON…………..11.9  DEPARTURE…….-16.4

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 54/29/42/+15/…./0.0/386/72         53 W   AERO 53 W   RMY 54
01/02 34/24/29/+2/…./…/432/81          22 NW  AERO 22 NW  RMY N/A
01/03 42/28/35/+9/0.01/T/228/43            28 WNW AERO 30 WNW RMY 30
01/04 43/30/37/+11/…./…/354/66         29 SW  AERO 29 SW  RMY 29
01/05 41/32/37/+11/1.19/000/000/00         26 NE  AERO 25 NNW RMY 27
01/06 42/21/32/+6/0.00/0.0/300/56          42 NW  AERO 46 NW  RMY 50
01/07 26/14/20/-6/…/…/474/88 37 NW  AERO 41 NW  RMY N/A
01/08 40/24/32/+6/…/…/000/00           24 SSE AERO 23 SSE RMY N/A
01/09 42/31/37/+11/…/…/…/..          44 W   AERO 46 WNW RMY 45
01/10 32/20/26/+1/T/T/…/..               37 NW  AERO 41 NW  RMY 43
01/11 26/12/19/-6/0.00/0.0/…/..          36 WNW AERO 37 WNW RMY 38
01/12 26/9/18/-7/0.00/0.0/…/..           32 NW  AERO 32 NW  RMY 29
01/13 25/11/18/-7/0.00/0.0/…/..          18 NNW AERO 16 NW  RMY N/A
01/14 27/20/24/-1/0.00/0.0/…/..          20 NNE AERO 17 N   RMY N/A
01/15 34/18/26/1/0.00/0.0/…/.. 22 NW  AERO 21 NNW RMY N/A
01/16 34/23/29/+4/0.00/0.0/…/..          33 W   AERO 32 W   RMY 35
01/17 27/13/20/-5/0.00/0.0/…/..          30 NNW AERO 28 NW  RMY N/A
01/18 40/21/31/+6/0.00/0.0/…/..          18 WNW AERO 18 WNW RMY N/A
01/19 31/24/28/+3/…/1.6/…/..           30 E   AERO 30 E   RMY N/A
01/20 33/3/18/-7/…/…/…/..            39 ENE AERO 43 ENE RMY 39
01/21 3/-2/1/-24/0.00/0.0/…/..           32*WNW AERO 41 WNW RMY M
01/22 24/0/12/-13/0.00/0.0/…/..          28 NW  AERO 30 NW  RMY 29

01/23 Low temp since midnight is 15F; normal low is 17F

*Official gust chart reading low

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

RECORDS FOR JANUARY 23
HIGH 62F IN 1906
LOW -10F IN 1976
PRECIP 2.40 INS. IN 1935
SNOWFALL 14.6 INS. IN 1966
PEAK GUST 85 MPH S IN 1992

RECORDS FOR JANUARY 24
HIGH 60F IN 1967
LOW -12F IN 1907
PRECIP 2.04 INS. IN 1998
SNOWFALL 11.3 INS. IN 1935
PEAK GUST 82 MPH S IN 1996

TODAY’S REPORT PREPARED BY: Benjamin Turner