Monday, February 25, 2019

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

DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, FEBRUARY 25, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

STRONG WINDS AND LOWER THAN NORMAL TEMPERATURES
ATOP GREAT BLUE HILL….

Wind has averaged more than 30 miles an hour since
the 7 A.M. observation, with a max gust so far today
of 65 mph. These winds have remained westerly, advecting
cold air into the region. Precipitation overnight amounted
to 0.41 inches. Pressure has been steadily rising since this
morning, having increased by more than 6 millibars by 1 P.M.
The high so far today is 34F, 5 degrees below the normal of
39F. The low since midnight is 30F, 9 degrees above the
daily normal minimum of 39F.

Today’s Observations:

7 A.M.
Weather: Scattered altostratus, virga to the SE
Temperature: 31F; Dew Point: 21F; Wind: W at 22G28 kts
Sea-level pressure: 29.41 ins. Hg, rising steadily
Visibility: 30 miles
6-hr Max temp: 37F
6-hr Min temp: 30F
24-hr Precip: 0.41 ins.
24-hr snowfall: Trace
Snow depth: Trace
BHO SA 1155 70 SCT 30 959/31/21/2722G28/941/ VIRGA SE PK
WND 2736/38/ 8/080 70041 51030 10037 20030

10 A.M.
Weather: Overcast altostratus, virga in all directions
Temperature: 32F; Dew Point: 19F; Wind: W at 30G46 kts
Peak wind: 55 MPH (48 knots) W at 8:06 A.M.
Sea-level pressure: 29.47 ins. Hg, rising steadily
Visibility: 30 miles
3-hr Precip: Trace
BHO SA 1455 E70 OVC 30 979/32/19/2730G46/947/ VIRGA ALQDS
PK WND 2748/1306/ 8/02/ 600// 51020

1 P.M.
Weather: Broken altocumulus
Temperature: 32F; Dew Point: 14F; Wind: W at 30G43 kts
Peak wind: 65 MPH (56 kts) W at 11:10 A.M.
Sea-level pressure: 29.52 ins. Hg, rising steadily
Visibility: 40 miles
6-hr Max temp: 34F
6-hr Min temp: 31F
6-hr Precip:   Trace
6-hr snowfall: Trace
Snow depth: Trace
BHO SA 1755 E70 BKN 40 996/32/14/2730G43/952/ PK WND
2756/1610/ 8/070 600// 53017 10034 20031

SUMMARY FOR SUNDAY, FEBRUARY 24, 2019

TEMPERATURE (DEGREES F)
MAX…..45   NORMAL…..39
MIN…..30   NORMAL…..21
MEAN….38   NORMAL…..30

DEPARTURE FROM 30-YEAR NORMAL……………………+8
TOTAL DEPARTURE FOR THE MONTH…………………..+76 [+3.0 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..27   DEPARTURE………-8
TOTAL HEATING UNITS FOR THE MONTH………….821   DEPARTURE……..-78
TOTAL HEATING UNITS FOR THE SEASON………..4317   DEPARTURE…….-113
TOTAL HEATING UNITS LAST SEASON TO DATE……4028   DIFFERENCE……+289

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..41 W   AT 11:25 P.M.
AERO…………………….37 W   AT 10:12 P.M.
ASOS…………………….43 W   AT 11:25 P.M.
DAVIS……………………42 W   AT 11:00 P.M. RMY 47
FASTEST MILE FOR YESTERDAY………………….33 E   AT 11:51 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….31 ESE AT 11:54 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………33 E   AT 11:56 A.M.
AVERAGE WIND SPEED AND DIRECTION…………..16.6 ESE
ASOS…………………..16.1
DAVIS………………….16.4 SE [137 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.41  DEPARTURE…….+0.25
ASOS…………..0.44
TOTAL PRECIPITATION FOR THE MONTH……….3.34  DEPARTURE…….-0.08
ASOS…………..3.34
TOTAL PRECIPITATION FOR THE YEAR………..8.69  DEPARTURE…….+0.92
ASOS…………..8.82

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………T  DEPARTURE……..-0.5
TOTAL SNOWFALL FOR THE MONTH…………….8.6  DEPARTURE……..-3.4
TOTAL SNOWFALL FOR THE SEASON…………..21.0  DEPARTURE…….-24.1

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 38/27/33/+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/…./…/000/00          28 ENE AERO 24 ENE RMY 28
02/08 51/27/39/+12/…./…/204/34         46 W   AERO 46 WNW RMY 51
02/09 32/20/26/-1/0.00/0.0/594/100         50 WNW AERO 52 WNW RMY 52
02/10 33/18/26/-1/0.00/0.0/510/85          24 WNW AERO 23 WNW RMY 25
02/11 34/21/28/+1/0.00/0.0/318/53          24 NNW AERO 23 NNW RMY 25
02/12 33/13/23/-4/…./2.8/000/00          32 E   AERO 30 E   RMY 26
02/13 39/29/34/+6/…./0.1/018/03          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 44/26/35/+7/0.00/0.0/…/..          25 NW  AERO 25 NW  RMY N/A
02/17 37/19/28/0/…./…/…/..           30 NNW AERO 25 NNW RMY N/A
02/18 30/16/23/-6/…./…/…/..          35 NW  AERO 36 NW  RMY 41
02/19 30/10/20/-9/0.00/0.0/…/..          35 NW  AERO 33 NW  RMY N/A
02/20 26/12/19/-10/…./…/…/..         16 WNW AERO 14 SSW RMY N/A
02/21 43/21/32/+3/…./…/…/..          36 W   AERO 33 W   RMY 38
02/22 43/30/37/+8/…./0.0/…/..          22 NW  AERO 21 NW  RMY 23
02/23 38/24/31/+1/0.00/0.0/…/..          18 NNW AERO 16 NNW RMY N/A
02/24 45/30/38/+8/…./…/…/..          41 W   AERO 37 W   RMY 47

02/25 Low temp since midnight is 30F; normal low is 21F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):

RECORDS FOR FEBRUARY 25
HIGH 68F IN 2017
LOW -10F IN 1894
PRECIP 2.40 INCHES IN 1981
SNOWFALL 13.6 INCHES IN 1966
PEAK GUST 76 MPH S IN 2016

RECORDS FOR FEBRUARY 26
HIGH 67F IN 1957
LOW -7F IN 1928
PRECIP 2.24 INCHES IN 1979
SNOWFALL 11.1 INCHES IN 1933
PEAK GUST 66 MPH W IN 1961

TODAY’S REPORT PREPARED BY: Benjamin Turner