Saturday, February 16, 2019

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, FEBRUARY 16, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

EARLY CLOUDS DEPART LEAVING A NEARLY CLEAR AND SUNNY SKY…

The light rain of yesterday left a total of 0.11 inches
of new precipitation. Partial cloudiness this morning
moved out to sea by mid-morning, leaving a bright and
nearly clear sky. The visibility has quickly climbed
to 70-75 miles by mid-day. The wind has remained very
steady from the WNW with occasional gusts to 24 mph.
The high so far today was 44F back at midnight, and
after the morning low of 30F, the temperature has
recovered to 40F by afternoon.

Today’s Observations:

7 A.M.
Weather: Scattered altocumulus, scattered altostratus,
two layers of broken cirrus, few altocumulus lenticularis SW-N
Temperature: 30F; Dew Point: 20F; Wind: WNW at 10 kts
Sea-level pressure: 29.73 ins. Hg, rising then more slowly
Visibility: 45 miles, hazy
6-hr Max temp: 40F
6-hr Min temp: 30F
24-hr Precip: 0.11 ins.
24-hr snowfall: 0.0 ins
Snow depth: 0 ins.
BHO SA 1155 100 SCT 150 SCT 220 -BKN 250 –BKN 45 069/30/20/3010/973/
FEW ACSL SW-N HAZY/ 8/071 51013 70011 10040 20030

10 A.M.
Weather: Clear, few stratocumulus distant W-N, few altocumulus
distant ENE-S
Temperature: 35F; Dew Point: 20F; Wind: WNW at 11G18 kts,
Sea-level pressure: 29.78 ins. Hg, rising then falling, now higher
Visibility: 75 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 CLR 75 083/35/20/3011G18/978/ FEW SC DSNT W-N
FEW AC DSNT ENE-S/ 8/530 50016

1 P.M.
Weather: Clear, few stratocumulus distant NW-N, few altocumulus
distant SSE-SSW
Temperature: 39F; Dew Point: 19F; Wind: WNW at 13 kts,
Sea-level pressure: 29.75 ins. Hg, falling then more quickly
Visibility: 70 miles
6-hr Max temp: 39F
6-hr Min temp: 30F
6-hr Precip:  0.00 ins.
6-hr snowfall: 0.0 ins.
BHO SA 1755 CLR 70 074/39/19/3013/975/ FEW SC DSNT NW-N
FEW AC DSNT SSE-SSW/ 8/530 58009 10039 20030

SUMMARY FOR FRIDAY, FEBRUARY 15, 2019

TEMPERATURE (DEGREES F)
MAX…..49   NORMAL…..37
MIN…..29   NORMAL…..19
MEAN….39   NORMAL…..28

DEPARTURE FROM 30-YEAR NORMAL…………………..+11
TOTAL DEPARTURE FOR THE MONTH…………………..+74 [+4.7 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..26   DEPARTURE……..-11
TOTAL HEATING UNITS FOR THE MONTH………….499   DEPARTURE……..-75
TOTAL HEATING UNITS FOR THE SEASON………..3995   DEPARTURE…….-110
TOTAL HEATING UNITS LAST SEASON TO DATE……3829   DIFFERENCE……+166

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..40 S   AT 2:19 P.M.
AERO…………………….40 S   AT 2:19 P.M.
ASOS…………………….42 S   AT 2:19 P.M.
DAVIS……………………49 S   AT 5:49 P.M. RMY 44
FASTEST MILE FOR YESTERDAY………………….30 S   AT 2:32 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….31 S   AT 2:34 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………32 S   AT 6:28 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..18.7 S
ASOS…………………..18.0
DAVIS………………….18.8 SSE [167 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.11  DEPARTURE…….-0.04
ASOS…………..0.14
TOTAL PRECIPITATION FOR THE MONTH……….2.04  DEPARTURE…….-0.03
ASOS…………..2.03
TOTAL PRECIPITATION FOR THE YEAR………..7.39  DEPARTURE…….+0.97
ASOS…………..7.51

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0  DEPARTURE……..-0.5
TOTAL SNOWFALL FOR THE MONTH…………….2.9  DEPARTURE……..-4.5
TOTAL SNOWFALL FOR THE SEASON…………..15.3  DEPARTURE…….-25.2

PRELIMINARY CLIMATE SUMMARY FOR FEBRUARY 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

02/01 19/5/12/-14/0.00/0.0/552/95          29 W   AERO 28 W   RMY N/A
02/02 30/7/19/-7/0.00/0.0/318/55           32 WSW AERO 32 WSW RMY 31
02/03 38/27/26/+7/0.00/0.0/126/22          26 S   AERO 25 S   RMY N/A
02/04 59/33/46/+20/0.00/0.0/540/93         25 SSW AERO 28 SSW RMY N/A
02/05 62/39/51/+25/0.00/0.0/354/60         30 WNW AERO 29 WNW RMY 32
02/06 39/28/34/+8/…./…/396/67          24 NNW AERO 23 NNW RMY N/A
02/07 37/31/34/+7/…./…/…/..          28 ENE AERO 24 ENE RMY 28
02/08 51/27/39/+12/…./…/…/..         46 W   AERO 46 WNW RMY 51
02/09 32/20/26/-1/0.00/0.0/…/..          50 WNW AERO 52 WNW RMY 52
02/10 33/18/26/-1/0.00/0.0/…/..          24 WNW AERO 23 WNW RMY 25
02/11 34/21/28/+1/0.00/0.0/…/..          24 NNW AERO 23 NNW RMY 25
02/12 33/13/23/-4/…./2.8/…/..          32 E   AERO 30 E   RMY 26
02/13 39/29/34/+6/…./0.1/…/..          36 W   AERO 32 W   RMY 36
02/14 37/26/32/+4/0.00/0.0/…/..          44 WNW AERO 42 WNW RMY 45
02/15 49/29/39/+11/0.11/0.0/…/..         40 S   AERO 40 S   RMY 44

02/16 Low temp since midnight is 30F; normal low is 19F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):

RECORDS FOR FEBRUARY 16
HIGH 62F IN 1954
LOW -16F IN 1943
PRECIP 1.91 INCHES IN 1958
SNOWFALL 18.6 INCHES IN 1958
PEAK GUST 78 MPH W IN 1967

RECORDS FOR FEBRUARY 17
HIGH 61F IN 1981
LOW -16F IN 1896
PRECIP 1.86 INCHES IN 2003
SNOWFALL 20.0 INCHES IN 2003
PEAK GUST 72 MPH NW IN 1968

TODAY’S REPORT PREPARED BY: Mike Iacono