Monday, January 28, 2019

| January 28, 2019 | Reply

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

DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, JANUARY 28, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

FAIR WEATHER WITH NORTHWESTERLY WINDS AND
GOOD VISIBILITY ATOP GREAT BLUE HILL….

Wind has remained at or below 10 mph from the
northwest for the majority of the day. Cool,
dry air has entered the region, with a relative
humidity under 40% observed in the afternoon.
A high layer of cirrus clouds have increased
slightly throughout the day, almost seen
covering the whole sky at the 1 P.M. observation.
We observed a visibility of 70 miles or higher
this morning, becoming 75 miles in the afternoon.
The high temperature so far today is 37F, 3 degrees
above the daily normal of 34F. The low since midnight
is 22F, which is 5 degrees above the daily normal
minimum of 17F.

Today’s Observations:

7 A.M.
Weather: Broken cirrus
Temperature: 23F; Dew Point: 9F; Wind: NW at 10G13 kts
Sea-level pressure: 30.03 ins. Hg, falling steadily
Visibility: 70 miles
6-hr Max temp: 36F
6-hr Min temp: 23F
24-hr Precip: 0.00 ins.
24-hr snowfall: 0.0 ins.
Snow depth: 0 ins.
BHO SA 1155 E250 BKN 70 169/23/9/3210G13/003/ 8/002
51010 10036 20023

10 A.M.
Weather: Broken cirrus
Temperature: 25F; Dew Point: 6F; Wind: NW at 8G14 kts
Sea-level pressure: 30.09 ins. Hg, falling then rising
Visibility: 70 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 E250 BKN 70 191/25/6/3208G14/009/ 8/002
53022

1 P.M.
Weather: Broken cirrus
Temperature: 28F; Dew Point: 6F; Wind: NW at 7G13 kts
Sea-level pressure: 30.08 ins. Hg, falling steadily
Visibility: 75 miles
6-hr Max temp: 29F
6-hr Min temp: 22F
6-hr Precip: 0.00 ins.
6-hr snowfall: 0.0 ins.
Snow depth: 0 ins.
BHO SA 1755 E250 BKN 75 185/28/6/3207G13/008/ 8/002
58006 10029 20022

SUMMARY FOR SUNDAY, JANUARY 27, 2019

TEMPERATURE (DEGREES F)
MAX…..44   NORMAL…..34
MIN…..24   NORMAL…..17
MEAN….34   NORMAL…..25

DEPARTURE FROM 30-YEAR NORMAL……………………+9
TOTAL DEPARTURE FOR THE MONTH…………………..+49 [+1.6 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..31   DEPARTURE………-9
TOTAL HEATING UNITS FOR THE MONTH…………1020   DEPARTURE……..-48
TOTAL HEATING UNITS FOR THE SEASON………..3316   DEPARTURE……..-57
TOTAL HEATING UNITS LAST SEASON TO DATE……3181   DIFFERENCE……+135

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..39 S   AT 3:37 P.M.
AERO…………………….39 S   AT 3:34 P.M.
ASOS…………………….42 S   AT 3:38 P.M.
DAVIS……………………39 S   AT 3:07 P.M. RMY 41
FASTEST MILE FOR YESTERDAY………………….30 S   AT 3:09 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….30 S   AT 3:39 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………29 S   AT 3:39 P.M.
AVERAGE WIND SPEED AND DIRECTION……………16.0 SSE
ASOS……………………15.4
DAVIS…………………..15.3 S [183 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……….5.10  DEPARTURE…….+1.29
ASOS…………..5.25
TOTAL PRECIPITATION FOR THE YEAR………..5.10  DEPARTURE…….+1.29
ASOS…………..5.25

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…….-10.8
TOTAL SNOWFALL FOR THE SEASON…………..11.9  DEPARTURE…….-19.1

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/…/…/084/16          44 W   AERO 46 WNW RMY 45
01/10 32/20/26/+1/T/T/090/17               37 NW  AERO 41 NW  RMY 43
01/11 26/12/19/-6/0.00/0.0/366/68          36 WNW AERO 37 WNW RMY 38
01/12 26/9/18/-7/0.00/0.0/486/89           32 NW  AERO 32 NW  RMY 29
01/13 25/11/18/-7/0.00/0.0/456/84          18 NNW AERO 16 NW  RMY N/A
01/14 27/20/24/-1/0.00/0.0/120/22          20 NNE AERO 17 N   RMY N/A
01/15 34/18/26/1/0.00/0.0/402/73 22 NW  AERO 21 NNW RMY N/A
01/16 34/23/29/+4/0.00/0.0/270/47          33 W   AERO 32 W   RMY 35
01/17 27/13/20/-5/0.00/0.0/480/87          30 NNW AERO 28 NW  RMY N/A
01/18 40/21/31/+6/0.00/0.0/156/28          18 WNW AERO 18 WNW RMY N/A
01/19 31/24/28/+3/…/1.6/198/36           30 E   AERO 30 E   RMY N/A
01/20 33/3/18/-7/…/…/000/00            39 ENE AERO 43 ENE RMY 39
01/21 3/-2/1/-24/0.00/0.0/348/62           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 46/15/31/+6/0.00/0.0/…/..          37 SSW AERO 39 SSW RMY N/A
01/24 57/31/44/+19/1.44/0.0/…/..         77 S   AERO 79 S   RMY N/A
01/25 37/23/30/+5/0.00/0.0/…/..          41 WNW AERO 46 WNW RMY N/A
01/26 33/17/25/0/0.00/0.0/…/..           25 W   AERO 25 W   RMY 27
01/27 44/24/34/+9/0.00/0.0/…/..          39 S   AERO 39 S   RMY 41

01/28 Low temp since midnight is 22F; 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 28
HIGH 59F IN 1916
LOW -9F IN 1888, 1924
PRECIP 2.18 INS. IN 1897
SNOWFALL 15.0 INS. IN 1897
PEAK GUST 78e MPH SSE IN 1977

RECORDS FOR JANUARY 29
HIGH 66F IN 2002
LOW -11F IN 1888
PRECIP 1.48 INS. IN 1973
SNOWFALL 8.0 INS. IN 1943
PEAK GUST 72 MPH NW IN 1973

TODAY’S REPORT PREPARED BY: Benjamin Turner

Category: Daily Discussions

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