Wednesday, January 16, 2019
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, JANUARY 16, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME
CLOUDS MOVE IN WITH A DECREASING PRESSURE IN THE
AFTERNOON….
Sky cover increased considerably since this morning, where almost
clear conditions were observed at 7 A.M. and 10 A.M. Wind from
the SW has become more westerly as the day went on, in conjunction
with a pressure drop of almost 5 millibars since this morning.
A thin smoke layer became more significant at the 10 A.M. observation,
where visibility was reduced to 30 miles. The high temperature so far
today is 34F, a degree above the daily normal of 33F. The low since
midnight of 23F is slightly above the normal minimum of 17F, by
6 degrees.
Today’s Observations:
7 A.M.
Weather: Scattered cirrus
Temperature: 24F; Dew Point: 19F; Wind: SW at 14G17 kts
Station pressure: 29.28 ins. Hg, decreasing, then increasing
Visibility: 40 miles, thin smoke layer
6-hr Max temp: 26F
6-hr Min temp: 23F
24-hr Precip: 0.00
24-hr snowfall: 0.0
Snow depth: 0 ins.
BHO SA 1155 250 SCT 40 914/24/19/2314G17/928/ THN K LYR ALQDS/
8/002 55003 10026 20023
10 A.M.
Weather: Clear, few cirrus
Temperature: 31F; Dew Point: 22F; Wind: WSW at 15G22 kts
Station pressure: 29.26 ins. Hg, decreasing steadily
Visibility: 30 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 CLR 30 907/31/22/2415G22/926/ FEW CI ALQDS K LYR
ALG HRZN/ 8/001 56007
1 P.M.
Weather: Overcast stratocumulus
Temperature: 33F; Dew Point: 22F; Wind: W at 15G24 kts
Station pressure: 29.20 ins. Hg, falling then more rapidly
Visibility: 40 miles
6-hr Max temp: 33F
6-hr Min temp: 23F
6-hr Precip: 0.00 ins.
6-hr snowfall: 0.0 ins.
Snow depth: 0 ins.
BHO SA 1755 E34 OVC 40 887/33/22/2815G24/920/ THN K LYR ALQDS/
8/4// 58020 10033 20023
SUMMARY FOR TUESDAY, JANUARY 15, 2019
TEMPERATURE (DEGREES F)
MAX…..34 NORMAL…..33
MIN…..18 NORMAL…..17
MEAN….26 NORMAL…..25
DEPARTURE FROM 30-YEAR NORMAL……………………+1
TOTAL DEPARTURE FOR THE MONTH…………………..+46 [+2.9 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..39 DEPARTURE………-1
TOTAL HEATING UNITS FOR THE MONTH………….543 DEPARTURE……..-44
TOTAL HEATING UNITS FOR THE SEASON………..2839 DEPARTURE……..-53
TOTAL HEATING UNITS LAST SEASON TO DATE……2778 DIFFERENCE…….+61
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..22 NW AT 05:46 A.M.
AERO…………………….21 NNW AT 5:43 A.M.
ASOS…………………….23 NW AT 5:45 A.M.
DAVIS……………………22 NW AT 5:45 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY………………….15 NNW AT 05:42 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….16 NW AT 05:45 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………16 NNW AT 05:45 A.M.
AVERAGE WIND SPEED AND DIRECTION……………8.7 NW
ASOS……………………9.1
DAVIS…………………..9.1 NW [326 deg.]
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00 DEPARTURE…….-0.15
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….2.14 DEPARTURE…….+0.00
ASOS…………..2.15
TOTAL PRECIPITATION FOR THE YEAR………..2.14 DEPARTURE…….+0.00
ASOS…………..2.15
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0 DEPARTURE……..-0.6
TOTAL SNOWFALL FOR THE MONTH…………..Trace DEPARTURE……..-8.5
TOTAL SNOWFALL FOR THE SEASON……………7.7 DEPARTURE…….-16.8
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 34/24/29/+2/…./…/…/.. 22 NW AERO 22 NW RMY N/A
01/03 42/28/35/+9/0.01/T/…/.. 28 WNW AERO 30 WNW RMY 30
01/04 43/30/37/+11/…./…/…/.. 29 SW AERO 29 SW RMY 29
01/05 41/32/37/+11/1.19/…/…/.. 26 NE AERO 25 NNW RMY 27
01/06 42/21/32/+6/0.00/0.0/…/.. 42 NW AERO 46 NW RMY 50
01/07 26/14/20/-6/…/…/…/.. 37 NW AERO 41 NW RMY N/A
01/08 40/24/32/+6/…/…/…/.. 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 Low temp since midnight is 23F; normal low is 17F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR JANUARY 16
HIGH 63F IN 1995
LOW -12F IN 2004
PRECIP 1.32 INS. IN 1936
SNOWFALL 14.0 INS. IN 1965
PEAK GUST 79 MPH WNW IN 1960
RECORDS FOR JANUARY 17
HIGH 55F IN 1973,1995
LOW -8F IN 1907,1982
PRECIP 1.43 INS. IN 1956
SNOWFALL 13.4 INS. IN 1956
PEAK GUST 62 MPH S IN 1994
TODAY’S REPORT PREPARED BY: Ben Turner and Nicholas Rousseau
