Sunday, May 8, 2022

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

SUNDAY, MAY 8, 2022
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0430E
SUNSET:  1852E

SUNSHINE THROUGH HIGH CLOUDS, BUT WINDY AND CHILLY FOR MOTHER’S DAY….

Not an ideal day for any outdoor plans with mom today, but at
least the sun is shining! Always have to focus on the positive.

Despite the sun, the air is quite chilly with readings generally
in the upper 40s and lower 50s. To add insult to injury, the
wind is once again blowing pretty good out of mainly an east-
northeasterly direction.

The average speed for the day has been around 18mph with a peak
gust of 43 mph.

The air is also quite dry with the dew point dropping below the
freezing mark early this afternoon. This dry air along with the
gusty wind is enhancing the fire risk once again today and as a
matter of fact, for the second Sunday in a row, we have another
rather large brush fire taking place about 3 miles to our east
within the Blue Hill Reservation. The smoke plume was dense enough
that visibility was restricted to 3 miles for a time in that
direction.

Otherwise visibility has been pretty decent today, increasing
from 40 miles early this morning to 60 miles by late morning.

The high so far today is 51F, which is 14 degrees below the
normal maximum of 65F. The low since midnight is 42F, which
is 4 degrees below the normal minimum of 46F.

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PRELIMINARY STATS FOR APRIL 2022

TEMPERATURE, Deg. F
Avg. Max. 57.5 [+1.2] Avg. Min. 38.7 [+0.8] Mean      48.1 [+1.0] 24-hour corrected mean: 47.3
Max. for month: 71F on the 13th
Min. for month: 32F on the 18th

HEATING DEGREE DAYS
Total heating units:    501 [ -39] Total for the season:  5364 [-523] Total for last season: 5341

PRECIPITATION, Inches
Total: 2.97 [-1.79] Greatest in 24 hrs: 0.96 on the 19th

SNOWFALL, Inches
Total: TRACE [-2.8] Greatest in 24 hrs: TRACE on the 17th

WIND, mph
Avg. uncorrected wind speed: 12.5 mph
Avg. corrected wind speed:   12.9 mph
Prevailing wind direction:   NW [20%] Peak gust and direction:  56 WNW on the 1st

SUNSHINE:
Campbell-Stokes card minutes: 13032 of a possible 23250, or 56%
Astronomical total minutes: 13505 of a possible 24106, or 56%

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Today’s Observations:

7 A.M.
Weather: Scattered stratocumulus, broken altocumulus, thin broken cirrus
Temperature: 45F; Dew Point: 37F; Relative Humidity: 73%
Wind: ENE @ 17G30 kts, peak wind ENE 36 mph at 6:32 A.M.
Sea-level pressure: 1021.5 mb; 30.17 in. Hg: rising, then more slowly
Visibility: 40 miles
6-hr Max temp: 45F
6-hr Min temp: 42F
24-hr Precip:  0.00 ins.
BHO SA 1155 20 SCT E130 BKN 250 -BKN 40 215/45/37/0717G30/017/
PK WND 0731/32/ 8/551 51027 10045 20042

10 A.M.
Weather: Broken altocumulus, thin broken cirrus, few stratocumulus all
quadrants
Temperature: 46F; Dew Point: 34F; Relative Humidity: 62%
Wind: ENE @ 19G35 kts, peak wind ENE 40 mph at 09:54 A.M.
Sea-level pressure: 1022.9 mb; 30.21 in Hg: rising, then more slowly
Visibility: 60 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 E150 BKN 250 -BKN 60 229/46/34/0719G35/021/
FEW SC ALQDS PK WND 0735/54/ 8/551 51014

1 P.M.
Weather: Thin broken cirrus, few cirrocumulus all quadrants,
smoke plume E-S
Temperature: 48F, Dew point: 30F; Relative Humidity: 49%
Wind: ENE @ 20G35 kts, peak wind ENE 42 mph at 12:35 P.M.
Sea-level pressure: 1023.1 mb; 30.21 in Hg, rising, then falling
Visibility: 60 miles, 3 miles E (smoke)
6-hr Max temp: 51F
6-hr Min temp: 45F
6-hr Precip:  0.00 ins.
BHO SA 1755 E250 -BKN 60 231/48/30/0620G35/021/ FEW CC ALQDS
K PLUME E-S VSBY 3 E PK WND 0637/35/ 8/009 50002 10051 20045

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SUMMARY FOR SATURDAY, MAY 7, 2022

TEMPERATURE (DEGREES F)
MAX…….49     NORMAL…..65
MIN…….42     NORMAL…..46
MEAN……46     NORMAL…..55

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…… -9
TOTAL DEPARTURE FOR THE MONTH………………-16 [-2.5 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022)
TOTAL HEATING UNITS FOR YESTERDAY………….19  DEPARTURE……..+9
TOTAL HEATING UNITS FOR THE MONTH………….91  DEPARTURE…….+13
TOTAL HEATING UNITS FOR THE SEASON……….5455  DEPARTURE……-510
TOTAL HEATING UNITS LAST SEASON TO DATE…..5426  DEPARTURE…….+29

COOLING DEGREE DAYS (SEASON: JAN 2022 THRU DEC 2022)
TOTAL COOLING UNITS FOR YESTERDAY…………..0  DEPARTURE……..-1
TOTAL COOLING UNITS FOR THE MONTH…………..0  DEPARTURE……..-3
TOTAL COOLING UNITS FOR THE SEASON………….0  DEPARTURE……..-6
TOTAL COOLING UNITS LAST SEASON TO DATE……..0  DEPARTURE………0

PEAK WIND GUST (MPH):
Official (1-Sec AVG)…….48 ENE @  8:01 A.M.
AEROVANE……………….51 ENE @  8:01 A.M.
VECTOR #2 (Instantaneous)..53     @  8:01 A.M.
DAVIS #2 ………………46 E   @  8:01 A.M.
RMY #2 (Instantaneous)…..50 ENE @  8:01 A.M.
ASOS………..OUT OF SERVICE D/T RENOVATIONS
VECTOR #1……OUT OF SERVICE D/T RENOVATIONS
DAVIS #1…….OUT OF SERVICE D/T RENOVATIONS
RMY #1………OUT OF SERVICE D/T RENOVATIONS
MERLIN………OUT OF SERVICE D/T RENOVATIONS

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………33 ENE @  9:34 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..31     @  9:33 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………31 ENE @  9:33 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..30 ENE @  9:33 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……..OUT OF SERVICE D/T RENOVATIONS
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE….OUT OF SERVICE D/T RENOVATIONS
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…OUT OF SERVICE D/T RENOVATIONS
MAXIMUM 2-MINUTE RMY #1 AVERAGE……OUT OF SERVICE D/T RENOVATIONS

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..17.3 ENE [415 total miles] VECTOR #2………………17.3
DAVIS #2……………….17.5 ENE
RMY #2…………………16.8 ENE
RMY #1……….OUT OF SERVICE D/T RENOVATIONS
ASOS…………OUT OF SERVICE D/T RENOVATIONS
VECTOR #1…….OUT OF SERVICE D/T RENOVATIONS
DAVIS #1……..OUT OF SERVICE D/T RENOVATIONS

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…….0.00  DEPARTURE…..-0.12
TOTAL PRECIPITATION FOR THE MONTH………….0.58  DEPARTURE…..-0.30
TOTAL PRECIPITATION FOR THE YEAR………….16.86  DEPARTURE…..-2.80

PRELIMINARY CLIMATE SUMMARY FOR APRIL 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

4/01  57/35/46/+5/0.41/0.0/183/24         56 WNW AERO 55 WNW RMY 58
4/02  52/34/43/+2/0.00/0.0/697/91         45 WNW AERO 43 WNW RMY 47
4/03  51/36/44/+2/0.03/0.0/215/28         23 NE  AERO 18 NE  RMY 23
4/04  56/35/46/+4/0.02/0.0/610/79         35 NW  AERO 30 NW  RMY 34
4/05  62/37/50/+7/0.00/0.0/698/90         25 SSW AERO 24 S   RMY 25
4/06  44/39/42/-1/0.22/0.0/000/00         33 ENE AERO 32 E   RMY 34
4/07  52/38/45/+1/0.06/0.0/000/00         50 ESE AERO 50 ESE RMY 53
4/08  61/42/52/+8/0.24/0.0/470/60         45 ESE AERO 45 SE  RMY 47 TSTM
4/09  59/39/49/+5/0.10/0.0/291/37         40 S   AERO 40 S   RMY 43
4/10  55/35/45/0/T/0.0/560/71             35 NW  AERO 32 NW  RMY 34
4/11  62/35/49/+4/T/0.0/728/92            31 NNW AERO 30 NNW RMY 31
4/12  68/46/57/+11/0.06/0.0/349/44        32 W   AERO 30 W   RMY 31
4/13  71/47/59/+13/0.00/0.0/670/84        33 S   AERO 31 S   RMY 35
4/14  50/43/47/0/0.16/0.0/000/00          19 N   AERO 18 N   RMY 18
4/15  66/43/55/+8/T/0.0/691/86            37 S   AERO 37 S   RMY 39
4/16  70/40/55/+8/0.40/0.0/314/39         42 S   AERO 53 SSW RMY 45
4/17  48/36/42/-6/0.01/T/461/57           38 N   AERO 36 N   RMY 39
4/18  55/32/44/-4/0.00/0.0/616/76         35 E   AERO 30 E   RMY 34
4/19  55/39/47/-2/0.96/0.0/325/40         55 S   AERO 53 S   RMY 58
4/20  56/37/47/-2/0.00/0.0/808/99         40 WNW AERO 37 WNW RMY 41
4/21  60/40/50/0/T/0.0/541/66             45 SSW AERO 41 SSW RMY 47
4/22  65/46/56/+6/0.00/0.0/699/85         39 WNW AERO 35 WNW RMY 39
4/23  66/40/53/+3/0.00/0.0/577/70         24 NW  AERO 22 W   RMY 25
4/24  50/40/45/-6/T/0.0/165/20            29 ENE AERO 26 ENE RMY 30
4/25  59/41/50/-1/0.00/0.0/464/56         22 S   AERO 21 S   RMY 23
4/26  54/42/48/-4/0.24/0.0/000/00         20 SSW AERO 18 S   RMY 21
4/27  56/39/48/-4/0.06/0.0/350/42         48 NW  AERO 47 NW  RMY 48
4/28  53/35/44/-8/0.00/0.0/669/80         45 NNW AERO 45 NW  RMY 46
4/29  55/35/45/-8/0.00/0.0/664/79         40 NNW AERO 39 NNW RMY 39
4/30  58/34/46/-7/0.00/0.0/690/82         24 NNW AERO 23 NNW RMY 24

PRELIMINARY CLIMATE SUMMARY FOR MAY CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/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

5/01  69/40/55/+2/0.00/…/..             25 SSE AERO 25 SSE RMY 27
5/02  58/42/50/-4/0.21/…/..             21 NE  AERO 19 NE  RMY 20
5/03  57/43/50/-4/0.23/…/..             23 ENE AERO 22 ENE RMY 24
5/04  52/45/49/-5/0.14/…/..             19 NW  AERO 18 SE  RMY 19
5/05  70/46/58/+3/0.00/…/..             23 NNW AERO 21 NNW RMY 23
5/06  63/49/56/+1/0.00/…/..             20 S   AERO 18 S   RMY 21
5/07  49/42/46/-9/0.00/…/..             48 ENE AERO 51 ENE RMY 50

5/08  The low since midnight is 42F, the daily normal low is 46F

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

RECORDS FOR MAY 8
HIGH 89F IN 2000
LOW 29F IN 1956
PRECIP 1.48 INCHES IN 1886
SNOWFALL TRACE IN 1898, 1947
PEAK GUST 68e MPH NNW IN 1943

RECORDS FOR MAY 9
HIGH 93F IN 2000
LOW 31F IN 1947
PRECIP 2.72 INCHES IN 1954
SNOWFALL 5.0 INS IN 1977 (RECORD FOR MAY)
PEAK GUST 70e MPH NE IN 1977

TODAY’S REPORT PREPARED BY: Matt Douglas