Friday, February 26, 2021

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

FRIDAY, FEBRUARY 26, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0624E
SUNSET:  1731E

LIGHT WINDS ALONGSIDE SUNNY SKIES ATOP GREAT BLUE HILL….

After yesterday’s busy west-northwest wind peaking at 50 MPH,
things have settled down quite a bit. We are averaging about
8 MPH, down from nearly 20 MPH experienced as a whole yesterday.
The lighter winds are making the seasonable temperatures feel
much warmer.

Visibility has been excellent thus far averaging 80 miles.
Our main mountain markers (Mount Wachusett and Mount Monadnock),
are in clear sight!

Despite the above average temperatures this week, our snow depth
stands at 8 inches this afternoon – a testament to its high water
content. A gaze to our east and southeast indicates both Houghton’s
Pond and Ponkapoag remain 100% ice covered, though ice depth has
likely shrunk with the mild weather of this week.

The high so far today is 38F, 1 degree below the daily
average max of 39F. The low since midnight is 22F, 1
degree above the daily average low of 21F.

Today’s Observations:

7 A.M.
Weather: Clear
Temperature: 25F; Dew Point: 14F; Relative Humidity: 62%
Wind: WNW @ 8 kts
Sea-level pressure: 30.37 in Hg; rising, then rising more rapidly
Visibility: 80 miles
6-hr Max temp: 27F
6-hr Min temp: 22F
24-hr Precip: 0.00 ins.
24-hr Snow: 0.0 ins.
Snow Depth: 8 ins.
BHO SA 1155 CLR 80 283/25/14/3008/037/ 8/000 4/008 53032 10027 20022

10 A.M.
Weather: Clear (few cumulus distant WSW-WNW)
Temperature: 32F; Dew Point: 14F; Relative Humidity: 47%
Wind: NW @ 12G16 kts
Sea-level pressure: 30.45in Hg; rising, then rising more slowly
Visibility: 80 miles
3-hr Precip: 0.00 ins.
3-hr Snow: 0.0 ins.
BHO SA 1455 CLR 80 311/32/14/3212G16/045/ FEW CU DSNT WSW-WNW/
8/100 51028

1 P.M.
Weather: Clear (few cumulus distant SE-SW, few cirrus distant SE-W)
Temperature: 37F, Dew point: 15F; Relative Humidity: 40%
Wind: W @ 11 kts
Sea-level pressure: 30.43 in Hg; rising, then falling
Visibility: 85 miles
6-hr Max temp: 38F
6-hr Min temp: 25F
6-hr Precip: 0.00 ins.
6-hr Snow: 0.0 ins.
Snow Depth: 8 ins.
BHO SA 1755 CLR 85 304/37/15/28011/043/ FEW CU DSNT SE-SW
FEW CI DSNT SE-W/ 8/101 4/008 58007 10038 20025

SUMMARY FOR THURSDAY, FEBRUARY 25, 2021

TEMPERATURE (DEGREES F)
MAX…….43   NORMAL…..39
MIN…….28   NORMAL…..21
MEAN……36   NORMAL…..30

DEPARTURE FROM 30-YEAR (1981-2010) NORMAL……. +6
TOTAL DEPARTURE FOR THE MONTH……………….+20 [+0.6 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………29  DEPARTURE…… -6
TOTAL HEATING UNITS FOR THE MONTH…………..912  DEPARTURE……-22
TOTAL HEATING UNITS FOR THE SEASON…………3956  DEPARTURE…..-508
TOTAL HEATING UNITS LAST SEASON TO DATE…….4018  DEPARTURE……-62

PEAK WIND GUST (MPH):
420C/Official…………..50 WNW @ 5:07 A.M.
AEROVANE (south tower)…..55 WNW @ 5:01 A.M.
ASOS…………………..50 WNW @ 5:07 A.M.
DAVIS #1……………….51 WNW @ 4:53 A.M.
DAVIS #2 (south tower)…..50  NW @ 5:02 A.M.
RMY……………………57     @ 4:52 A.M.
VECTOR…………………58     @ 4:53 A.M.
MERLIN…………………53

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………36 WNW @ 4:41 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….31 W   @ 5:27 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………35 WNW @ 4:42 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………36 WNW @ 5:06 A.M.
MAXIMUM 2-MINUTE RMY AVERAGE………………..31  NW @ 5:05 A.M.
MAXIMUM 2-MINUTE VECTOR AVERAGE……………..33     @ 4:39 A.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……19.6 WNW  [471 total miles] ASOS…………………18.3
DAVIS #1……………..19.7 WNW
DAVIS #2……………..20.3 WNW
RMY………………….17.7 WNW
VECTOR……………….18.9

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….+1.88
ASOS………….5.65
TOTAL PRECIPITATION FOR THE YEAR…………..7.78  DEPARTURE….+0.15
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….+26.4
TOTAL SNOWFALL FOR THE SEASON……………..72.3  DEPARTURE….+26.7

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   43/28/30/+6/0.00/0.0/…/..       50 WNW  AERO 55 WNW  RMY 57

02/26 The low since midnight is 22F, 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 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

RECORDS FOR FEBRUARY 27
HIGH 61F IN 1976
LOW -8F IN 1900
PRECIP 1.43 INCHES IN 2013
SNOWFALL 6.0 INCHES IN 1922
PEAK GUST 67 MPH W IN 1985

TODAY’S REPORT PREPARED BY: Andrew Swanson