Monday, May 9, 2022

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

MONDAY, MAY 9, 2022
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0429E
SUNSET:  1853E

SUNSHINE THROUGH HIGH CLOUDS ONCE AGAIN, STILL COOL AND WINDY….

The weather has been like a broken record it seems for the
last few days. Today is once again featuring filtered sunshine
through high thin cirrus clouds along with a busy wind off the
chilly ocean.

The average speed for the day has been around 17mph with a peak
gust of 43 mph.

Despite the sun, the air remains chilly with readings generally
in the low to mid 50s.

The air is also quite dry with the dew point dropping below the
freezing mark late this morning. This dry air along with the
gusty wind is enhancing the fire risk once again today, but so
far we have not observed any smoke anywhere.

Visibility has been pretty decent today, holding at around 60
miles all day.

The high so far today is 54F, which is 11 degrees below the
normal maximum of 65F. The low since midnight is 39F, which
is 7 degrees below the normal minimum of 46F.

————————————————————–

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%

————————————————————–

Today’s Observations:

7 A.M.
Weather: Thin broken cirrus
Temperature: 46F; Dew Point: 34F; Relative Humidity: 62%
Wind: NE @ 15G24 kts, peak wind NE 32 mph at 6:15 A.M.
Sea-level pressure: 1025.6 mb; 30.29 in. Hg: rising, then more slowly
Visibility: 60 miles
6-hr Max temp: 46F
6-hr Min temp: 39F
24-hr Precip:  0.00 ins.
BHO SA 1155 E250 -BKN 60 256/46/34/0515G24/029/ PK WND 0428/15/
8/001 51021 10046 20039

10 A.M.
Weather: Thin broken cirrus
Temperature: 50F; Dew Point: 26F; Relative Humidity: 38%
Wind: NE @ 20G34 kts, peak wind NE 43 mph at 09:17 A.M.
Sea-level pressure: 1027.1 mb; 30.33 in Hg: rising, then more slowly
Visibility: 60 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 E250 -BKN 60 271/50/26/0520G34/033/ PK WND 0537/17/
8/001 51015

1 P.M.
Weather: Scattered cirrostratus, thin broken cirrus, few stratocumulus
distant ESE-S few altocumulus distant E-S
Temperature: 52F, Dew point: 31F; Relative Humidity: 44%
Wind: NE @ 18G32 kts, peak wind NE 40 mph at 12:02 P.M.
Sea-level pressure: 1027.7 mb; 30.35 in Hg, rising, then more slowly
Visibility: 60 miles
6-hr Max temp: 54F
6-hr Min temp: 46F
6-hr Precip:  0.00 ins.
BHO SA 1755 200 SCT E250 -BKN 60 277/52/31/0418G32/035/ FEW SC DSNT ESE-S
FEW AC DSNT E-S PK WND 0535/02/ 8/575 51006 10054 20046

————————————————————–

SUMMARY FOR SUNDAY, MAY 8, 2022

TEMPERATURE (DEGREES F)
MAX…….51     NORMAL…..65
MIN…….40     NORMAL…..46
MEAN……46     NORMAL…..55

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…… -9
TOTAL DEPARTURE FOR THE MONTH………………-25 [-3.3 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…………110  DEPARTURE…….+22
TOTAL HEATING UNITS FOR THE SEASON……….5474  DEPARTURE……-501
TOTAL HEATING UNITS LAST SEASON TO DATE…..5444  DEPARTURE…….+30

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)…….43 ENE @ 10:19 A.M.
AEROVANE……………….N/A
VECTOR #2 (Instantaneous)..49     @ 12:35 P.M.
DAVIS #2 ………………41 E   @ 12:36 P.M.
RMY #2 (Instantaneous)…..47 ENE @ 12:35 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………………30 ENE @ 12:54 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..28     @ 12:54 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………29 ENE @ 12:54 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..28 NE  @ 12:54 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……..15.9 ENE [381 total miles] VECTOR #2………………15.9
DAVIS #2……………….16.1 ENE
RMY #2…………………15.4 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…..-0.42
TOTAL PRECIPITATION FOR THE YEAR………….16.86  DEPARTURE…..-2.92

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/+2/0.00/786/93             25 SSE AERO 25 SSE RMY 27
5/02  58/42/50/-4/0.21/059/07             21 NE  AERO 19 NE  RMY 20
5/03  57/43/50/-4/0.23/229/27             23 ENE AERO 22 ENE RMY 24
5/04  52/45/49/-5/0.14/000/00             19 NW  AERO 18 SE  RMY 19
5/05  70/46/58/+3/0.00/666/78             23 NNW AERO 21 NNW RMY 23
5/06  63/49/56/+1/0.00/051/06             20 S   AERO 18 S   RMY 21
5/07  49/42/46/-9/0.00/112/13             48 ENE AERO 51 ENE RMY 50
5/08  51/40/46/-9/0.00/…/..             43 ENE AERO N/A    RMY 47

5/09  The low since midnight is 39F, 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 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

RECORDS FOR MAY 10
HIGH 93F IN 1896
LOW 29F  IN 1900
PRECIP 1.85 INS IN 1998
SNOW 2.8 INS 1977 (7.8 INS TOTAL 5/9-5/10 1977)
PEAK GUST 64 MPH S IN 1990

TODAY’S REPORT PREPARED BY: Matt Douglas