Saturday, January 26, 2019

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, JANUARY 26, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

FAIR WEATHER WITH LIGHT WINDS AND TEMPERATURES NEAR
NORMAL FOR THE SEASON….

We observed little change in sky conditions today, with
westerly winds occasionally exceeding 10 mph. The max
gust so far today is 18 mph. A distant haze kept the
visibility at 40 miles this morning, but increased to
70 miles by the 1 P.M. observation. Relative humidity
decreased from 70% to 37% this afternoon. The max
temperature so far today is 32F, 2 degrees below the
daily normal high of 34F. The low temperature since
midnight is 17F, which is the same as the normal minimum.

Today’s Observations:

7 A.M.
Weather: Scattered cirrus, few altocumulus
Temperature: 18F; Dew Point: 9F; Wind: W at 7G14 kts,
Sea-level pressure: 30.22 ins. Hg, rising steadily
Visibility: 40 miles
6-hr Max temp: 22F
6-hr Min temp: 17F
24-hr Precip: 0.00 ins.
24-hr snowfall: 0.0 ins.
Snow depth: 0 ins.
BHO SA 1155 250 SCT 40 232/18/9/2607G14/022/ FEW AC
ALQDS/ 8/072 53012 10022 20017

10 A.M.
Weather: Scattered cirrus
Temperature: 25F; Dew Point: 10F; Wind: SW at 5 kts,
Wind: Light
Sea-level pressure: 30.23 ins. Hg, falling then rising
Visibility: 40 miles, distant haze
3-hr Precip: 0.00 ins.
BHO SA 1455 250 SCT 40 237/25/10/2205/023/ DSNT HZ ALQDS
WND LGT/ 8/002 50005

1 P.M.
Weather: Scattered cirrostratus
Temperature: 32F; Dew Point: 8F; Wind: W at 8G14 kts,
Sea-level pressure: 30.20 ins. Hg, decreasing steadily
Visibility: 70 miles
6-hr Max temp: 32F
6-hr Min temp: 17F
6-hr Precip: 0.00 ins.
6-hr snowfall: 0.0 ins.
Snow depth: 0 ins.
BHO SA 1755 250 SCT 70 227/32/8/2608G14/020/ 8/008 58010
10032 20017

SUMMARY FOR FRIDAY, JANUARY 25, 2019

TEMPERATURE (DEGREES F)
MAX…..37   NORMAL…..34
MIN…..23   NORMAL…..17
MEAN….30   NORMAL…..25

DEPARTURE FROM 30-YEAR NORMAL……………………+5
TOTAL DEPARTURE FOR THE MONTH…………………..+40 [+1.4 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..35   DEPARTURE………-5
TOTAL HEATING UNITS FOR THE MONTH………….949   DEPARTURE……..-40
TOTAL HEATING UNITS FOR THE SEASON………..3245   DEPARTURE……..-48
TOTAL HEATING UNITS LAST SEASON TO DATE……3113   DIFFERENCE……+132

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..41 WNW AT 12:10 A.M.
AERO…………………….46 WNW AT 12:13 A.M.
ASOS…………………….42 WNW AT 12:11 A.M.
DAVIS……………………45 WNW AT 12:10 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY………………….32 WNW AT 12:03 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….31 W   AT 12:12 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………33 WNW AT 12:12 A.M.
AVERAGE WIND SPEED AND DIRECTION…………..14.3 W
ASOS…………………..13.9
DAVIS………………….14.9 WNW [285 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……….5.10  DEPARTURE…….+1.56
ASOS…………..5.25
TOTAL PRECIPITATION FOR THE YEAR………..5.10  DEPARTURE…….+1.56
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……..-9.7
TOTAL SNOWFALL FOR THE SEASON…………..11.9  DEPARTURE…….-18.0

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 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 26
HIGH 68F IN 1950 [RECORD FOR MONTH] LOW -5F IN 1920
PRECIP 1.60 INS. IN 1958
SNOW 9.0 INS. IN 1898
WIND 90e MPH SE IN 1978

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

TODAY’S REPORT PREPARED BY: Benjamin Turner