Monday, February 22, 2021

| February 22, 2021 | Reply

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

MONDAY, FEBRUARY 22, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0630E
SUNSET:  1726E

OVERCAST, BREEZY, AND “MILDER” TODAY….

A gusty south wind is helping to advect a milder air-
mass into the region today. Temperatures have reached
the upper 30s (above 36F) for the first time since last
Tuesday. This is only the second time since way back on
the 6th!

The wind has been gradually increasing through the day out
of the south, gusting recently up to 40 mph. The average
speed since 7 A.M. is around 16 mph.

A brief snow shower was observed between 8-9am this
morning, but so far that’s been it precipitation-wise.

The high so far today is 37F, 1 degree below the daily
average max of 38F. The low since midnight is 21F, 1 degree
above the daily average low of 20F.

Today’s Observations:

7 A.M.
Weather: Broken altostratus, overcast cirrostratus,
virga all quadrants
Temperature: 24F; Dew Point: 14F; Relative Humidity: 65%
Wind: S @ 14 kts
Sea-level pressure: 30.30 in Hg; falling, then more rapidly
Visibility: 30 miles
6-hr Max temp: 24F
6-hr Min temp: 21F
24-hr Precip: 0.00 ins.
24-hr Snow: 0.0 ins.
Snow Depth: 16 ins.
BHO SA 1155 E100 BKN 180 OVC 30 260/24/14/1714/030/
VIRGA ALQDS THN K LYR ALNG HRZN ALQDS/ 8/027 4/016
58030 10024 20021

10 A.M.
Weather: Scattered stratocumulus, broken altostratus,
overcast cirrostratus, sun dimly visible
Temperature: 31F; Dew Point: 23F; Relative Humidity: 72%
Wind: S @ 15G21 kts
Sea-level pressure: 30.21 in Hg; falling, then more rapidly
Visibility: 25 miles, hazy
3-hr Precip: Trace
3-hr Snow: Trace
BHO SA 1455 40 SCT E85 BKN 180 OVC 25 231/31/23/1715G21/021/
VIRGA ALQDS SUN DMLY VSBL HAZY TOTAL NEW SNW PST 3 HRS
TRACE/ 8/527 58029 6000/

1 P.M.
Weather: Broken stratocumulus, overcast altostratus
Temperature: 36F, Dew point: 29F; Relative Humidity: 75%
Wind: S @ 18G26 kts, peak wind S 40 mph at 12:08 P.M.
Sea-level pressure: 30.03 in Hg, falling, then more rapidly
Visibility: 30 miles
6-hr Max temp: 37F
6-hr Min temp: 24F
6-hr Precip: Trace.
6-hr Snow: Trace.
Snow Depth: 16 ins.
BHO SA 1755 E27 BKN 60 OVC 30 171/36/29/1818G26/003/
TOTAL NEW SNW PST 6 HRS TRACE PK WND 1836/08/ 8/52/
4/016 58060 6000/ 10037 20024

SUMMARY FOR SUNDAY, FEBRUARY 21, 2021

TEMPERATURE (DEGREES F)
MAX…….33   NORMAL…..38
MIN…….15   NORMAL…..20
MEAN……24   NORMAL…..29

DEPARTURE FROM 30-YEAR (1981-2010) NORMAL…… -5
TOTAL DEPARTURE FOR THE MONTH……………….-7 [-0.5 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………41  DEPARTURE…….+5
TOTAL HEATING UNITS FOR THE MONTH…………..798  DEPARTURE…….+5
TOTAL HEATING UNITS FOR THE SEASON…………3842  DEPARTURE…..-481
TOTAL HEATING UNITS LAST SEASON TO DATE…….3927  DEPARTURE……-85

PEAK WIND GUST (MPH):
420C/Official…………..27 NW  @  9:01 A.M.
AEROVANE (south tower)…..28 NW  @  9:01 A.M.
ASOS…………………..28 NW  @  9:02 A.M.
DAVIS #1……………….28 NW  @  9:01 A.M.
DAVIS #2 (south tower)…..25 NNW @  9:01 A.M.
RMY……………………29     @  9:00 A.M.
VECTOR…………………31     @  9:00 A.M.
MERLIN…………………29

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………18 NNW @ 10:06 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….17 NNW @ 10:07 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………18 NNW @  9:53 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………20 NNW @  9:03 A.M.
MAXIMUM 2-MINUTE RMY AVERAGE………………..17 NNW @  9:51 A.M.
MAXIMUM 2-MINUTE VECTOR AVERAGE……………..18     @ 10:03 A.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…… 9.9 NW  [237 total miles]
ASOS………………… 9.8
DAVIS #1……………..10.5 NW
DAVIS #2……………..10.5 NW
RMY…………………. 9.6 NW
VECTOR……………….10.2

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…….0.00  DEPARTURE….-0.14
ASOS………….0.00
TOTAL PRECIPITATION FOR THE MONTH………….5.24  DEPARTURE….+2.29
ASOS………….5.42
TOTAL PRECIPITATION FOR THE YEAR…………..7.56  DEPARTURE….+0.26
ASOS…………7.77

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HOURS ENDING 7 A.M………..0.0  DEPARTURE…. -0.6
TOTAL SNOWFALL FOR THE MONTH………………38.9  DEPARTURE….+28.4
TOTAL SNOWFALL FOR THE SEASON……………..72.3  DEPARTURE….+28.7

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 The low since midnight is 21F, the daily normal low is 20F

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 22
HIGH 63F IN 1997
LOW -1F IN 1918
PRECIP 1.38 INCHES IN 1900
SNOWFALL 8.0 INCHES IN 1893
PEAK GUST 74 MPH S IN 1974

RECORDS FOR FEBRUARY 23
HIGH 67F IN 2017
LOW -8F IN 1907
PRECIP 1.48 INCHES IN 1967
SNOWFALL 10.6 INCHES IN 1967
PEAK GUST 73 MPH WNW IN 1974

TODAY’S REPORT PREPARED BY: Matt Douglas

Category: Daily Discussions

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