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Saturday, March 27, 2021

March 27, 2021

BLUE HILL METEOROLOGICAL OBSERVATORYMILTON, MASSACHUSETTSELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA SATURDAY, MARCH 27, 2021ALL TIMES ARE IN EASTERN STANDARD…

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

SATURDAY, MARCH 27, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0536E
SUNSET:  1805E

FAIR WEATHER WITH EXCELLENT VISIBILITY ATOP
GREAT BLUE HILL….

Today we observed great weather with a persistent visibility
of 85 miles. Wind is around 10 mph from the west with a max
gust of 20 mph. Pressure has risen significantly overnight,
and humidity is approaching 30% with a dew point below
freezing.  

The drought monitor was updated yesterday. Our spring
precipitation deficit has left us and much of MA in abnormally
dry conditions. While this is not much cause for alarm, it
does mean elevated fire risk on windy, dry days. Computer
models are indicating, however, a chance of a good soaking rain
on Sunday. While not ideal to have this over the weekend of course,
it will make a beneficial impact on vegetation and reservoirs, and
will calm the fire danger.

-Drought monitor section by Andrew Swanson

Much warmer than normal weather continues to exist
throughout much of the region. The high so far today
is 61F, which is 13 degrees above the normal high of
48F. The low since midnight is 42F, which is 12 degrees
above the daily normal low of 30F.

Tours are available from 10 A.M. to 4 P.M. on Friday, Saturday,
Sunday and Monday!

Today’s Observations:

7 A.M.
Weather: Clear, few distant cumulus NW-N
Temperature: 46F; Dew Point: 36F; Relative Humidity: 68%
Wind: WNW @ 8 kts
Sea-level pressure: 30.06 in Hg; rising, then more rapidly
Visibility: 85 miles
6-hr Max temp: 46F
6-hr Min temp: 42F
24-hr Precip: 0.00 ins.
24-hr Snow: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1155 CLR 85 181/46/36/2908/006/ FEW DSNT CU NW-N/ 8/100
53038 10046 20042

10 A.M.
Weather: Clear, few distant cumulus and altostratus NW-NE
Temperature: 52F; Dew Point: 34F; Relative Humidity: 49%
Wind: NW @ 7 kts
Sea-level pressure: 30.01 in Hg; falling then rising
Visibility: 85 miles
3-hr Precip: 0.00 ins
3-hr Snow: 0.0 ins.
BHO SA 1455 CLR 85 165/52/34/3107/001/ FEW DSNT CU/AS NW-NE/ 8/170
50016

1 P.M.
Weather: Few cumulus
Temperature: 59F, Dew point: 30F; Relative Humidity: 32%
Wind: N @ 4 kts, light and variable
Sea-level pressure: 30.09 in Hg; rising then falling
Visibility: 85 miles
6-hr Max temp: 61F
6-hr Min temp: 46F
6-hr Precip: 0.00 ins.
6-hr Snow: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1755 CLR 85 189/59/30/3504/009/ FEW CU/CI ALQDS/ 8/101 55008
10061 20046

SUMMARY FOR FRIDAY, MARCH 26, 2021

TEMPERATURE (DEGREES F)
MAX…….63     NORMAL…..48
MIN…….48     NORMAL…..30
MEAN……56     NORMAL…..39

DEPARTURE FROM 30-YEAR (1981-2010) NORMAL……. +17
TOTAL DEPARTURE FOR THE MONTH………………. +78 [+3.5 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………….9  DEPARTURE……-17
TOTAL HEATING UNITS FOR THE MONTH…………..694  DEPARTURE……-96
TOTAL HEATING UNITS FOR THE SEASON…………4739  DEPARTURE…..-618
TOTAL HEATING UNITS LAST SEASON TO DATE…….4757  DEPARTURE……-18

PEAK WIND GUST (MPH):
                     420C/Official…………..58 W   @  9:49 P.M.
                     AEROVANE (south tower)…..67 W   @  9:49 P.M.
                     ASOS…………………..56 W   @  9:51 P.M.
                     DAVIS #1……………….60 W   @  9:51 P.M.
                     DAVIS #2 (south tower)…..56 WNW @  9:52 P.M.
                     RMY……………………63     @  9:50 P.M.
                     VECTOR…………………65     @  9:51 P.M.
                     MERLIN…………………55

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………40 W   @  9:53 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….39 W   @  9:52 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………44 W   @  9:53 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………41 WNW @  8:59 P.M.
MAXIMUM 2-MINUTE RMY AVERAGE………………..37 WNW @  9:50 P.M.
MAXIMUM 2-MINUTE VECTOR AVERAGE……………..40     @  9:50 P.M.

AVERAGE WIND SPEED AND DIRECTION:
                     CONTACTING/OFFICIAL……20.3 S [488 total miles]                     ASOS…………………19.7  
                     DAVIS #1……………..19.2 SW  
                     DAVIS #2……………..20.8 SW
                     RMY………………….19.5 SSW
                     VECTOR……………….20.2

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…….0.00  DEPARTURE….-0.19
                             ASOS………….0.00
TOTAL PRECIPITATION FOR THE MONTH………….1.06  DEPARTURE….-3.61
                             ASOS………….1.09
TOTAL PRECIPITATION FOR THE YEAR…………..9.06  DEPARTURE….-4.03
                              ASOS…………9.35

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HOURS ENDING 7 A.M………. 0.0  DEPARTURE…. -0.3
TOTAL SNOWFALL FOR THE MONTH……………… 0.2  DEPARTURE….-11.1
TOTAL SNOWFALL FOR THE SEASON……………..72.6  DEPARTURE….+14.8

PRELIMINARY CLIMATE SUMMARY FOR MARCH 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

03/01   42/24/33/+2/0.13/T/020/03        69 WNW  AERO 78 WNW  RMY 78
03/02   27/10/19/-12/T/0.1/679/100       63 WNW  AERO 71 WNW  RMY 69
03/03   45/19/32/0/0.00/0.0/375/55       30 W    AERO 30 W    RMY 34
03/04   38/22/30/-2/0.00/0.0/520/76      46 NW   AERO 51 NW   RMY 53
03/05   31/18/25/-7/0.00/0.0/549/80      39 WNW  AERO 44 NW   RMY 45
03/06   33/15/24/-8/0.00/0.0/675/98      28 WNW  AERO 29 WNW  RMY 30
03/07   35/15/25/-8/0.00/0.0/686/99      21 NW   AERO 22 NW   RMY 23
03/08   38/19/29/-4/T/T/389/56           20 NW   AERO 20 NW   RMY 21
03/09   56/30/43/+10/T/T/…/..          32 WNW  AERO 35 WNW  RMY 37
03/10   54/32/43/+10/0.00/0.0/…/..     29 SSW  AERO 29 SSW  RMY 31
03/11   71/35/53/+19/0.00/0.0/…/..     41 SSW  AERO 43 SSW  RMY 46
03/12   62/42/52/+18/0.00/0.0/…/..     52 WNW  AERO 59 WNW  RMY 57
03/13   46/27/37/+3/0.00/0.0/…/..      53 WNW  AERO 59 WNW  RMY 57
03/14   45/19/32/-3/0.01/0.1/…/..      51 WNW  AERO 58 NW   RMY 58
03/15   27/12/20/-15/0.00/0.0/…/..     48 NW   AERO 47 NW   RMY 54
03/16   37/13/25/-10/0.00/0.0/…/..     22 NNW  AERO 22 NNW  RMY 23
03/17   52/27/40/+4/0.00/0.0/…/..      28 S    AERO 25 S    RMY 29
03/18   46/34/40/+4/0.80/T/…/..        38 NE   AERO 40 NE   RMY 42
03/19   39/26/33/-3/T/T/…/..           37 N    AERO 38 N    RMY 41
03/20   58/24/41/+4/0.00/0.0/…/..      23 W    AERO 23 W    RMY 27
03/21   62/39/51/+14/0.00/0.0/…/..     22 S    AERO 23 S    RMY 25
03/22   62/36/49/+12/0.00/0.0/…/..     21 S    AERO 18 S    RMY 22
03/23   65/38/52/+14/0.00/0.0/…/..     22 ESE  AERO 18 SE   RMY 21
03/24   63/44/54/+16/…./0.0/…/..     22 SSE  AERO 21 SSE  RMY 21
03/25   67/49/58/+20/0.11/0.0/…/..     25 S    AERO 26 S    RMY 26
03/26   63/48/56/+17/0.01/0.0/…/..     58 W    AERO 67 W    RMY 63

03/27 The low since midnight is 42F, the daily normal low is 30F

DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)

RECORDS FOR MARCH 27
HIGH 78 IN 1998
LOW 12 IN 1975
PRECIP 1.05 INS. IN 1913
SNOWFALL 6.6 INS. IN 1959
PEAK GUST 62 MPH NW IN 1965, SE IN 1992

RECORDS FOR MARCH 28
HIGH 86 IN 1998
LOW 7 IN 1923
PRECIP 2.31 INS. IN 1932
SNOWFALL 5.0 INS. IN 2015
PEAK GUST 60e MPH NW IN 1944, 60 WSW IN 1991

TODAY’S REPORT PREPARED BY: Benjamin Turner

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Blue Hill Observatory & Science Center · Legal

Data Use & Privacy Policy

Please read the full Policy before accessing Observatory data · Effective January 1, 2025

Notice: By accessing, downloading, or using any Blue Hill Observatory data or services, you unconditionally accept and agree to be bound by this Policy in its entirety. If you do not agree, you may not access or use Observatory data.
Effective January 1, 2025 · Milton, Massachusetts · bluehill.org
Part I — Data Use Policy
§ 01

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§ 02

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§ 03

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§ 04

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§ 05

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§ 08

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Effective January 1, 2025 · Blue Hill Observatory & Science Center · Milton, Massachusetts
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