Sunday, January 27, 2019

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, JANUARY 27, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

PARTLY CLOUDY DAY WITH DROPPING PRESSURE AND ABOVE NORMAL
TEMPERATURES….

Warm air is moving into the area due to wind
prevailing from the southeast throughout the day. Pressure
has been decreasing since the 7 o’clock observation, however,
cloud cover continues to remain at about 1/2 of the sky
being obscured at all observations. Although a haze remains
in the area, visibility has increased from 20 miles to 40 miles
between the 7 A.M. observation to the 1 P.M. observation.
Our high so far today is 43F, which is 9 degrees above our
normal high of 34F.

Today’s Observations:

7 A.M.
Weather: Scattered stratus, scattered cirrus, distant
haze in all directions
Temperature: 24F; Dew Point: 16F; Wind: SE at 13 kts,
Sea-level pressure: 30.17 ins. Hg, decreasing steadily
Visibility: 20 miles
6-hr Max temp: 25F
6-hr Min temp: 24F
24-hr Precip: 0.00 ins.
24-hr snowfall: 0.0 ins.
Snow depth: 0 ins.
BHO SA 1155 40 SCT 250 SCT 20 218/24/16/1413/017/ DSNT
HZ ALQDS/ 8/601 56015 10025 20024

10 A.M.
Weather: Scattered cirrus
Temperature: 35F; Dew Point: 26F; Wind: SSE at 9G21 kts
Sea-level pressure: 30.23 ins. Hg, decreasing, then more
quickly
Visibility: 20 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 210 SCT 20 201/35/26/1609G21/012/ DSNT
HZ ALQDS/ 8/001 58017

1 P.M.
Weather: Scattered cumulus, scattered cirrus, distant
haze in all directions
Temperature: 42F; Dew Point: 31F; Wind: S at 18G23 kts,
Sea-level pressure: 30.01 ins. Hg, decreasing, then more
slowly
Visibility: 40 miles
6-hr Max temp: 43F
6-hr Min temp: 24F
6-hr Precip: 0.00 ins.
6-hr snowfall: 0.0 ins.
Snow depth: 0 ins.
BHO SA 1755 40 SCT 210 SCT 40 162/42/31/1918G23/001/
DSNT HZ ALQDS/ 8/102 56039 10043 20024

SUMMARY FOR SATURDAY, JANUARY 26, 2019

TEMPERATURE (DEGREES F)
MAX…..33   NORMAL…..34
MIN…..17   NORMAL…..17
MEAN….25   NORMAL…..25

DEPARTURE FROM 30-YEAR NORMAL…………………….0
TOTAL DEPARTURE FOR THE MONTH…………………..+40 [+1.3 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..40   DEPARTURE……….0
TOTAL HEATING UNITS FOR THE MONTH………….989   DEPARTURE……..-39
TOTAL HEATING UNITS FOR THE SEASON………..3285   DEPARTURE……..-48
TOTAL HEATING UNITS LAST SEASON TO DATE……3154   DIFFERENCE……+131

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..25 W   AT 3:20 P.M.
AERO…………………….25 W   AT 3:18 P.M.
ASOS…………………….26 WSW AT 3:21 P.M.
DAVIS……………………27 W   AT 3:20 P.M. RMY 27
FASTEST MILE FOR YESTERDAY………………….19 W   AT 3:18 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….20 WSW AT 3:22 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………21 WSW AT 3:22 P.M.
AVERAGE WIND SPEED AND DIRECTION……………7.8 WSW
ASOS……………………7.8
DAVIS…………………..8.2 W [269 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…….+1.42
ASOS…………..5.25
TOTAL PRECIPITATION FOR THE YEAR………..5.10  DEPARTURE…….+1.42
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…….-10.2
TOTAL SNOWFALL FOR THE SEASON…………..11.9  DEPARTURE…….-18.5

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

01/26 Low temp since midnight is 17F; 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 27
HIGH 63F IN 1974
LOW -12F IN 1924
PRECIP 1.59 INS. IN 1996
SNOWFALL 25.2 INS. IN 2015 [RECORD FOR MONTH] PEAK GUST 91 MPH SSE IN 1996

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

TODAY’S REPORT PREPARED BY: Samantha Richard