Tuesday, June 13, 2023

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

TUESDAY, JUNE 13, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0407E
SUNSET:  1922E

DENSE FOG THIS MORNING GAVE WAY TO PARTIAL SUNSHINE THIS AFTERNOON,
WARM AND RATHER HUMID CONDITIONS AS WELL….

Rainfall overnight amounted to 0.18″ in the gauge, but it moved
out of the area by sunrise this morning. Overcast skies and dense
fog were left in its wake through most of the morning hours. The
fog lifted and clouds broke by the time we reached the noon hour.

Temperatures rapidly responded to the sun with readings reaching
the upper 70s by the 1pm observation. Humidity levels are on the
sticky side as well with the dew point reaching the mid to
upper 60s.

The wind has been rather light today, mainly out of a southerly
direction. The average speed for the day has been around 8mph.
The peak gust so far for the day is around 26mph, occurring
during the wee hours of the morning.

Visibility was quite low this morning, down to as low as 1/16th
of a mile, but has recovered markedly early this afternoon to
around 40 miles.

The high temperature so far today is 78F, this is 3 degrees above
the normal maximum of 75F. The low since midnight is 63F, this is
6 degrees above the normal minimum of 57F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Sky obscured, vertical visibility 100ft
Temperature: 64F; Dew Point: 64F; Relative Humidity: 100%
Wind: SSE @ 6 kts, wind light
Sea-level pressure: 1005.8 mb; 29.70 in. Hg: falling, then rising
Visibility: 1/16 mile, fog
6-hr Max temp: 64F
6-hr Min temp: 63F
24-hr Precip:  0.18 ins.
BHO SA 1155 X W1 1/16F 058/64/64/1606/970/ WND LGT/ 8////
53002 6002/ 70018 10064 20063

10 A.M.
Weather: Partial obscurement, overcast stratus, stratus fractus
occasionally drifting over summit
Temperature: 66F; Dew Point: 66F; Relative Humidity: 100%
Wind: SW @ 5 kts, wind light
Sea-level pressure: 1006.3 mb; 29.72 in. Hg: steady, then rising
Visibility: 3/4 mile, fog
3-hr Precip: 0.00 inches
BHO SA 1455 -X E2 OVC 3/4F 063/66/66/2105/972/ STFRA OCNL DRFTG
OVR SMT WND LGT/ 8/6// 53005

1 P.M.
Weather: Broken cumulus, broken altocumulus, thin broken cirrus,
fog dank distant N-NE
Temperature: 77F; Dew Point: 65F; Relative Humidity: 68%
Wind: S @ 6 kts, wind light and variable
Sea-level pressure: 1005.3 mb; 29.69 in. Hg: falling, then more rapidly
Visibility: 40 miles, 10 miles N-NE, hazy
6-hr Max temp: 77F
6-hr Min temp: 64F
6-hr Precip:  0.00 inches
BHO SA 1755 E25 BKN 40 BKN 250 -BKN 40 053/77/65/1706/969/
F BNK DSNT N-NE VSBY 10 N-NE HAZY WND L/V/ 8/261 58010 10077 20064

————————————————————–

SUMMARY FOR MONDAY, JUNE 12, 2023

TEMPERATURE (DEGREES F)
MAX…….79   NORMAL…..74
MIN…….60   NORMAL…..57
MEAN……70   NORMAL…..65

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL………+5
TOTAL DEPARTURE FOR THE MONTH………………..-38 [-3.4 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2022 THRU JUN 2023)
TOTAL HEATING UNITS FOR YESTERDAY…………….0  DEPARTURE……..-3
TOTAL HEATING UNITS FOR THE MONTH……………78  DEPARTURE…….+34
TOTAL HEATING UNITS FOR THE SEASON…………5274  DEPARTURE……-915
TOTAL HEATING UNITS LAST SEASON TO DATE…….5589  DEPARTURE……-315

COOLING DEGREE DAYS (SEASON: JAN 2023 THRU DEC 2023)
TOTAL COOLING UNITS FOR YESTERDAY…………….5  DEPARTURE……..+2
TOTAL COOLING UNITS FOR THE MONTH……………22  DEPARTURE……..-6
TOTAL COOLING UNITS FOR THE SEASON…………..53  DEPARTURE……..-2
TOTAL COOLING UNITS LAST SEASON TO DATE………84  DEPARTURE…….-31

PEAK WIND GUST (MPH):
Note: Instruments designated #1 = Main Tower, #2 = South Tower,
F420C, Contacting, Merlin, and Richards are all Main Tower.
E=Estimated

F420C (Official)……….E32 SSE   @  07:03 P.M.
VECTOR #1 (1-Sec)……….33 SSE   @  07:03 P.M.
VECTOR #2 (1-Sec)……….31 SSE   @  07:02 P.M.
DAVIS #1……………….30 SE    @  07:03 P.M.
DAVIS #2 ………………31 S     @  11:50 A.M.
RMY #1 (Instantaneous)…..31 SSE   @  07:02 P.M.
RMY #2 (Instantaneous)…..33 SSE   @  07:02 P.M.
MERLIN…………………29 SSE
RICHARDS (C5C) (Inst)……31       @  07:02 P.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………22 SSE @  07:03 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..22     @  07:03 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..22     @  07:03 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………22 SSE @  07:03 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………21 SE  @  07:03 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..21 SSE @  07:03 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..22 SSE @  07:03 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………22     @  07:03 P.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……….11.1 SSW [266 total miles] VECTOR #1………………..11.2
VECTOR #2………………..12.0
DAVIS #1…………………10.7 S
DAVIS #2…………………12.0 S
RMY #1…………………..10.8 S
RMY #2…………………..12.0 S
RICHARDS (C5C)……………11.3

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.18 DEPARTURE…..+0.01
TOTAL PRECIPITATION FOR THE MONTH…………..1.64 DEPARTURE…..-0.30
TOTAL PRECIPITATION FOR THE YEAR…………..22.39 DEPARTURE…..-2.15

————————————————————–

PRELIMINARY CLIMATE SUMMARY FOR JUNE CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN)/SUN(%)/PEAK GUST/VEC1/RMY GUST
PEAK GUST: F420C (Official)
VEC1: Vector #1 1-second gust
RMY:  R.M. Young #1 wind gust recording system (Instantaneous)
TSTM: Thunderstorm day (thunder heard some time during day)
….: Data not yet available, records not finalized
M:    Missing data

6/1   88/56/72/+10/0.00/859/95            21 WSW  VEC1 21 WSW RMY 21
6/2   91/53/72/+10/0.53/634/70            37 ENE  VEC1 39 ENE RMY 37 TSTM
6/3   53/43/48/-14/0.16/000/00            36 NE   VEC1 38 NE  RMY 36
6/4   52/43/48/-15/0.17/009/01            30 N    VEC1 32 N   RMY 29
6/5   58/47/53/-10/0.08/027/03            22 N    VEC1 24 N   RMY 23
6/6   72/50/61/-2/T/…/..                31 NNW  VEC1 31 NNW RMY 26 TSTM
6/7   65/50/58/-6/0.00/…/..             28 NW   VEC1 29 NW  RMY 29
6/8   64/51/58/-6/T/…/..                13 WNW  VEC1 13 WNW RMY 10
6/9   64/49/57/-7/0.47/…/..             20 WNW  VEC1 21 ESE RMY 20 TSTM
6/10  67/51/59/-6/0.05/…/..             26 WNW  VEC1 26 WNW RMY 26 TSTM
6/11  80/55/68/+3/0.00/…/..             23 S    VEC1 24 S   RMY 24
6/12  79/60/70/+5/0.15/…/..             32 SSE  VEC1 33 SSE RMY 31

6/13  The low since midnight is 63F, the daily normal low is 57F

DAILY RECORDS

06/02/2023: TIED RECORD HIGH MAXIMUM TEMPERATURE OF 91F,
ALSO SET IN 1895

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

RECORDS FOR JUNE 13
HIGH 93F IN 1988
LOW 43F IN 1982
PRECIP 6.07 INS 1998 [Record for month] PEAK GUST 69 MPH N IN 1956

RECORDS FOR JUNE 14
HIGH 93F IN 1956
LOW 41F IN 1912
PRECIP 1.49 INS 1896
PEAK GUST 55 MPH WNW IN 1958

TODAY’S REPORT PREPARED BY: Matt Douglas