Saturday, April 30, 2022

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

SATURDAY, APRIL 30, 2022
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0441E
SUNSET:  1843E

COOLER THAN AVERAGE, BUT BEAUTIFUL WEATHER….

Today’s weather conditions were fair, consisting of partly
cloudy skies and an excellent visibility of 85 miles. Wind
is easterly so far with 10 mph on average with an occasional
gust to 20 mph. It is much easier to be outdoors today
compared to yesterday.

The high so far today is 56F, which is 7 degrees below the
normal maximum of 63F. The low since midnight is 34F, which
is 9 degrees lower than the normal minimum of 43F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Broken cirrostratus, few distant cumulus offshore
NE-E
Temperature: 41F; Dew Point: 26F; Relative Humidity: 43%
Wind: N @ 8 kts
Sea-level pressure: 1018.5 mb; 30.08 in. Hg: Rising, then
more slowly
Visibility: 85 miles
6-hr Max temp: 41F
6-hr Min temp: 34F
24-hr Precip:  0.00 ins.
24-hr Snowfall: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1155 250 BKN 85 185/41/26/3608/008/ FEW CU DSNT OFFSHR NE-E/
8/106 51012 10041 20034

10 A.M.
Weather: Scattered cumulus
Temperature: 50F; Dew Point: 29F; Relative Humidity: 43%
Wind: N @ 9G15
Sea-level pressure: 1018.0 mb; 30.06 in Hg: falling unsteadily
Visibility: 85 miles
3-hr Precip: 0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 60 SCT 85 180/50/29/3609G15/006/ 8/100 57005

1 P.M.
Weather: Scattered cumulus
Temperature: 54F, Dew point: 30F; Relative Humidity: 39%
Wind: E @ 8 kts
Sea-level pressure: 1017.3 mb; 30.04 in Hg: falling steadily
Visibility: 85 miles
6-hr Max temp: 56F
6-hr Min temp: 41F
6-hr Precip:  0.00 ins.
6-hr Snowfall: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1755 60 SCT 85 173/54/30/0908/004/ 8/100 57007
10056 20041

————————————————————–

SUMMARY FOR FRIDAY, APRIL 29, 2022

TEMPERATURE (DEGREES F)
MAX…….55     NORMAL…..62
MIN…….35     NORMAL…..43
MEAN……45     NORMAL…..53

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…….-8
TOTAL DEPARTURE FOR THE MONTH………………+41 [+1.2 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022)
TOTAL HEATING UNITS FOR YESTERDAY………….20  DEPARTURE……..+7
TOTAL HEATING UNITS FOR THE MONTH…………482  DEPARTURE…….-46
TOTAL HEATING UNITS FOR THE SEASON……….5345  DEPARTURE……-530
TOTAL HEATING UNITS LAST SEASON TO DATE…..5328  DEPARTURE…….+17

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

PEAK WIND GUST (MPH):
Official (1-Sec AVG)…….40 NNW @  1:26 P.M.
AEROVANE……………….39 NNW @  1:26 P.M.
VECTOR #2 (Instantaneous)..42     @  4:39 P.M.
DAVIS #2 ………………37 NNW @  1:27 P.M.
RMY #2 (Instantaneous)…..39 NNW @  1:26 P.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………………25 NNW @  2:06 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..26     @  2:05 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………25 NNW @  2:05 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..26 NNW @  2:05 P.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…….. 14.5 NNW [348 total miles] VECTOR #2……………… 14.5
DAVIS #2………………. 14.4 NNW
RMY #2………………… 14.2 NNW
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…..-0.14
TOTAL PRECIPITATION FOR THE MONTH………….2.97  DEPARTURE…..-1.65
TOTAL PRECIPITATION FOR THE YEAR………….16.28  DEPARTURE…..-2.36

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M………….0.0  DEPARTURE…….0.0
TOTAL SNOWFALL FOR THE MONTH……………..TRACE  DEPARTURE……-2.8
TOTAL SNOWFALL FOR THE SEASON (2021-2022)…..70.7  DEPARTURE……+1.0

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/…./0.0/…/..         20 SSW AERO 18 S   RMY 21
4/27  56/39/48/-4/…./0.0/…/..         48 NW  AERO 47 NW  RMY 48
4/28  53/35/44/-8/…./0.0/…/..         45 NNW AERO 45 NW  RMY 46
4/29  55/35/45/-8/0.00/0.0/…/..         40 NNW AERO 39 NNW RMY 39

4/30  The low since midnight is 34F, the daily normal low is 43F

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

RECORDS FOR APRIL 30
HIGH 86 IN 1942
LOW 30 IN 1931
PRECIP 1.41 IN 1991
SNOWFALL 0.3 IN. IN 1909
PEAK GUST 64e MPH NW IN 1978

RECORDS FOR MAY 1
HIGH 87F IN 1899
LOW 29F IN 1978
PRECIP 2.53 INCHES IN 1921
SNOWFALL TRACE IN 1905,1917,1921,1995,2016
PEAK GUST 57 MPH NW IN 1974

TODAY’S REPORT PREPARED BY: Benjamin Turner