Thursday, February 25, 2021

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

THURSDAY, FEBRUARY 25, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0625E
SUNSET:  1729E

A BREEZY EARLY SPRING DAY ATOP GREAT BLUE HILL….

Today we’re seeing a great visibility of 80 miles with
a thin layer of cirrus clouds this afternoon. Wind is
much stronger in comparison to yesterday, with a max gust
of 51 mph this morning. Wind is still on the stronger side
with an average speed of 20 mph from the west with frequent
gusts of more than 30 mph. This is with a significant pressure
rise of more than 4 millibars per 3 hours.

The high so far today is 41F, 2 degrees above the daily
average max of 39F. The low since midnight is 37F, 16
degrees above the daily average low of 21F.

We are ranked as the 7th snowiest February on record.
Per our Chief Scientist, Mike Iacono:

BHO Snowiest Februarys, inches (1886-2021):

1) 83.6 in 2015
2) 65.4 in 1969
3) 51.3 in 2003
4) 45.2 in 1967
5) 40.4 in 1920
6) 39.7 in 2013
7) 38.9 in 2021 (through 7 AM on the 25th)
8) 37.0 in 1893
9) 36.0 in 1899

Today’s Observations:

7 A.M.
Weather: Scattered altostratus, few cumulus
Temperature: 37F; Dew Point: 25F; Relative Humidity: 61%
Wind: WNW @ 19G32 kts, peak of 45 mph W at 6:17 A.M.
Sea-level pressure: 29.81 in Hg; rising, then more rapidly
Visibility: 80 miles
6-hr Max temp: 43F
6-hr Min temp: 37F
24-hr Precip: 0.00 ins.
24-hr Snow: 0.0 ins.
Snow Depth: 8 ins.
BHO SA 1155 180 SCT 80 096/37/25/2919G32/981/ FEW CU ALQDS
PK WND 2840/17/ 8/180 4/008 51047 10043 20037

10 A.M.
Weather: Scattered cirrostratus, few cumulus
Temperature: 39F; Dew Point: 22F; Relative Humidity: 49%
Wind: WNW @ 18G32 kts, peak of 38 mph WNW at 9:22 A.M.
Sea-level pressure: 29.95 in Hg; rising, then more rapidly
Visibility: 80 miles
3-hr Precip: 0.00 ins.
3-hr Snow: 0.0 ins.
BHO SA 1455 200 SCT 80 143/39/22/3018G32/995/ FEW CU ALQDS
PK WND 2933/22/ 8/108 51047

1 P.M.
Weather: Scattered cumulus and cirrostratus
Temperature: 40F, Dew point: 18F; Relative Humidity: 40%
Wind: WNW @ 19G27 kts, peak of 38 mph W at 12:25 P.M.
Sea-level pressure: 29.97 in Hg, falling, then rising
Visibility: 85 miles
6-hr Max temp: 41F
6-hr Min temp: 37F
6-hr Precip: 0.00 ins.
6-hr Snow: 0.0 ins.
Snow Depth: 8 ins.
BHO SA 1755 50 SCT 220 SCT 85 150/40/18/2919G27/997/ PK WND
2833/25/ 8/105 4/008 50007 10041 20037

SUMMARY FOR WEDNESDAY, FEBRUARY 24, 2021

TEMPERATURE (DEGREES F)
MAX…….49   NORMAL…..39
MIN…….34   NORMAL…..21
MEAN……42   NORMAL…..30

DEPARTURE FROM 30-YEAR (1981-2010) NORMAL…… +12
TOTAL DEPARTURE FOR THE MONTH……………….+14 [+0.4 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………23  DEPARTURE……-12
TOTAL HEATING UNITS FOR THE MONTH…………..883  DEPARTURE……-16
TOTAL HEATING UNITS FOR THE SEASON…………3927  DEPARTURE…..-503
TOTAL HEATING UNITS LAST SEASON TO DATE…….4000  DEPARTURE……-73

PEAK WIND GUST (MPH):
420C/Official…………..39 SSW @  7:34 P.M.
AEROVANE (south tower)…..39 SSW @  9:02 P.M.
ASOS…………………..38 SSW @  7:35 P.M.
DAVIS #1……………….41 N   @  7:02 P.M.
DAVIS #2 (south tower)…..38 SSE @ 10:54 P.M.
RMY……………………42     @  7:34 P.M.
VECTOR…………………44     @  7:35 P.M.
MERLIN…………………N/A

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………28 SSW @  7:05 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….28 SSW @  7:07 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………29 NNW @  7:02 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………29 SSW @  9:04 P.M.
MAXIMUM 2-MINUTE RMY AVERAGE………………..27 SSW @  7:04 P.M.
MAXIMUM 2-MINUTE VECTOR AVERAGE……………..28     @  7:02 P.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……15.9 W  [382 total miles] ASOS…………………16.0
DAVIS #1……………..16.2 WNW
DAVIS #2……………..16.4 WSW
RMY………………….15.4 WSW
VECTOR……………….15.8

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…….0.00  DEPARTURE….-0.16
ASOS………….0.00
TOTAL PRECIPITATION FOR THE MONTH………….5.46  DEPARTURE….+2.04
ASOS………….5.65
TOTAL PRECIPITATION FOR THE YEAR…………..7.78  DEPARTURE….+0.01
ASOS…………8.00

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HOURS ENDING 7 A.M………..0.0  DEPARTURE…. -0.5
TOTAL SNOWFALL FOR THE MONTH………………38.9  DEPARTURE….+26.9
TOTAL SNOWFALL FOR THE SEASON……………..72.3  DEPARTURE….+27.2

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   32/21/27/+1/1.86/12.7/000/00      53 NE   AERO 65 NE   RMY 62
02/02   34/29/32/+6/0.91/1.6/000/00       52 NNE  AERO 55 NE   RMY 58
02/03   34/26/30/+4/0.01/0.2/036/06       20 NW   AERO 20 NW   RMY 22
02/04   37/26/32/+6/0.02/0.7/158/26       23 NW   AERO 22 NW   RMY M
02/05   39/26/33/+7/0.01/T/000/00         33 S    AERO 32 S    RMY 30
02/06   40/28/34/+8/0.00/0.0/595/97       42 WSW  AERO 41 WSW  RMY 47
02/07   35/25/30/+3/0.71/11.6/000/00      27 WNW  AERO 28 WNW  RMY 30
02/08   27/13/20/-7/0.00/0.0/619/100      29 NW   AERO 31 WNW  RMY 32
02/09   27/18/23/-4/0.17/2.2/000/00       16 N    AERO 16 N    RMY 17
02/10   31/15/23/-4/0.00/0.0/…/..       26 WNW  AERO 25 WNW  RMY 28
02/11   31/15/23/-4/0.00/0.0/…/..       28 NW   AERO 26 NW   RMY 31
02/12   25/8/17/-10/0.00/0.0/…/..       32 NW   AERO 35 NW   RMY 36
02/13   27/15/21/-7/0.00/0.0/…/..       20 NNW  AERO 20 NNW  RMY 23
02/14   34/24/29/+1/0.00/0.0/…/..       19 ENE  AERO 16 ENE  RMY 19
02/15   31/27/29/+1/0.11/0.0/…/..       21 NNE  AERO 21 NNE  RMY 22
02/16   44/29/37/+9/0.63/0.0/…/..       39 W    AERO 41 W    RMY 43
02/17   30/19/25/-3/0.00/0.0/…/..       40 W    AERO 41 WNW  RMY 40
02/18   29/21/25/-4/0.13/1.7/…/..       24 ENE  AERO 24 ENE  RMY 25
02/19   30/24/27/-2/0.66/7.7/…/..       24 NE   AERO 23 NE   RMY 24
02/20   32/19/26/-3/0.02/0.5/…/..       32 NW   AERO 35 NW   RMY 38
02/21   33/15/24/-5/0.00/0.0/…/..       27 NW   AERO 28 NW   RMY 29
02/22   40/21/31/+2/0.22/T/…/..         41 S    AERO 41 SSE  RMY 44
02/23   43/31/37/+7/0.00/0.0/…/..       31 WNW  AERO 31 WNW  RMY 32
02/24   49/34/42/+12/0.00/0.0/…/..      39 SSW  AERO 39 SSW  RMY 42

02/25 The low since midnight is 34F, the daily normal low is 21F

DAILY RECORDS

02/01 -RECORD SNOWFALL OF 12.7 INS, BREAKING PREVIOUS RECORD
OF 11.0 INS SET IN 1898
02/01 -RECORD PRECIPITATION OF 1.86 INS, BREAKING PREVIOUS
RECORD OF 1.30 INS SET IN 1898

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