Thursday, June 6, 2019

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

DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, JUNE 6, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

LIGHT RAIN THIS MORNING LEADS TO A DRIER
AFTERNOON WITH PARTLY CLOUDY SKIES….

Overnight rainfall amounted to 0.03 inches, with
an additional 0.06 inches falling this morning
between 8 and 9 A.M. Fog this morning limited
visibility to 10 miles, clearing up to 65 miles
by the 1 P.M. observation. Wind has decreased
since this morning, with an average speed of
10 mph following noontime. The high so far today
is 73F, a degree above the normal of 72F. The low
since midnight is 64F, 10 degrees above the
daily normal minimum of 54F.

PRELIMINARY STATS FOR MAY 2019

TEMPERATURE, Deg. F
Avg. Max. 63.5 [-2.8] Avg. Min. 46.0 [-1.8] Mean      54.8 [-2.2] 24-hour corrected mean: 54.4
Max. for month: 85F on the 26th
Min. for month: 36F on the 12th

HEATING DEGREE DAYS
Total heating units:    318 [+50] Total for the season:  6219 [-84] Total for last season: 5847

COOLING DEGREE DAYS
Total cooling units:   8 [-14] Total for the season:  8 [-16] Total for last season: 62

PRECIPITATION, Inches
Total: 4.71 [+0.08] Greatest in 24 hrs: N/A

SNOWFALL, Inches
Total: Trace [+/-0.0] Greatest in 24 hrs: Trace [12th]

WIND, mph
Avg. uncorrected wind speed: 10.5
Avg. corrected wind speed: 11.1
Prevailing wind direction: S at 13%
Peak gust and direction: 47 NW on 24th

SUNSHINE:
Campbell-Stokes card minutes: N/A
Astronomical total minutes:   N/A

Today’s Observations:

7 A.M.
Weather: Broken stratocumulus
Temperature: 67F; Dew Point: 67F; Wind: SW at 10G15 kts
Sea-level pressure: 29.66 ins. Hg, rising steadily
Visibility: 10 miles, distant fog
6-hr Max temp: 67F
6-hr Min temp: 64F
24-hr Precip: 0.03 ins.
24-hr snowfall: 0.0 ins.
Snow depth: 0 ins.
BHO SA 1155 E30 BKN 10 044/67/67/2010G15/966/
DSNT FG ALQDS/ 8/800 70003 51006 10067 20064

10 A.M.
Weather: Distant virga, scattered cumulus, broken
altocumulus
Temperature: 71F; Dew Point: 67F; Wind: E at 6G14 kts
Sea-level pressure: 29.70 ins. Hg, rising steadily
Visibility: 40 miles, except 10 miles NNW-SE due to fog
3-hr Precip: 0.06 ins.
BHO SA 1455 E15 SCT E65 BKN 40 056/71/67/1006G14/970/
DSNT FG VIRGA ALQDS VSBY 10 NNW-SE/ 8/220 6006/ 53012

1 P.M.
Weather: Scattered altostratus, few cumulus,
distant fog offshore
Temperature: 72F; Dew Point: 61F; Wind: NE at 7 kts
Sea-level pressure: 29.75 ins. Hg, rising steadily
Visibility: 65 miles
6-hr Max temp: 73F
6-hr Min temp: 64F
6-hr Precip: 0.06 ins.
BHO SA 1755 E110 SCT 65 075/72/61/0507/975/ FEW CU ALQDS
DSNT FG OFFSHR/ 8/160 6/006 51019 10073 20064

SUMMARY FOR WEDNESDAY, JUNE 5, 2019

TEMPERATURE (DEGREES F)
MAX…..81   NORMAL…..72
MIN…..57   NORMAL…..54
MEAN….69   NORMAL…..63

DEPARTURE FROM 30-YEAR NORMAL………………….+6
TOTAL DEPARTURE FOR THE MONTH………………….+1 [+0.0 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………0   DEPARTURE………-4
TOTAL HEATING UNITS FOR THE MONTH…………..13   DEPARTURE………-9
TOTAL HEATING UNITS FOR THE SEASON………..6232   DEPARTURE……..-93
TOTAL HEATING UNITS LAST SEASON TO DATE……5885   DIFFERENCE……+347

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………4   DEPARTURE………+2
TOTAL COOLING UNITS FOR THE MONTH……………4   DEPARTURE………-5
TOTAL COOLING UNITS FOR THE SEASON………….12   DEPARTURE……..-21
TOTAL COOLING UNITS LAST SEASON TO DATE……..69   DEPARTURE……..-57

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..33 SSW AT 5:04 A.M.
AERO…………………….33 SSW AT 5:12 A.M.
ASOS…………………….36 SW  AT 5:05 A.M.
DAVIS……………………37 S   AT 4:21 A.M.  RMY N/A
FASTEST MILE FOR YESTERDAY………………….26 SSW AT 4:22 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….24 SSW AT 5:05 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………24 S   AT 4:21 A.M.
AVERAGE WIND SPEED AND DIRECTION……………14.2 S
ASOS……………………14.4
DAVIS…………………..13.9 SSW [192 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.03  DEPARTURE…….-0.14
ASOS…………..0.03
TOTAL PRECIPITATION FOR THE MONTH……….0.07  DEPARTURE…….-0.76
ASOS…………..0.06
TOTAL PRECIPITATION FOR THE YEAR……….25.96  DEPARTURE…….+2.47
ASOS………….25.79

PRELIMINARY CLIMATE SUMMARY FOR MAY 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

05/01 57/40/49/-4/0.00/0.0/…/..           21 S   AERO 21 SSE  RMY 21
05/02 45/41/43/-10/0.02/0.0/…/..          21 NE  AERO 21 SSW  RMY 20
05/03 60/43/52/-1/…./0.0/…/..           23 S   AERO 23 S    RMY 22
05/04 54/46/50/-4/…./0.0/…/..           14 ENE AERO 14 ENE  RMY 17
05/05 52/44/48/-6/0.00/0.0/…/..           18 NE  AERO 20 NE   RMY N/A
05/06 58/44/51/-3/…./0.0/…/..           25 NE  AERO 26 ENE  RMY 24
05/07 72/41/57/+2/0.12/0.0/…/..           30 S   AERO 29 S    RMY 30
05/08 67/48/58/+3/0.00/0.0/…/..           20 NE  AERO 20 NE   RMY 19
05/09 60/43/52/-3/0.00/0.0/…/..           21 SE  AERO 21 E    RMY 22
05/10 61/46/54/-1/0.16/0.0/…/..           35 S   AERO 37 S    RMY 37
05/11 68/50/59/+3/…./…/…/..           26 NW  AERO M  M    RMY N/A
05/12 50/36/43/-13/0.68/T/…/..          30 ENE AERO M  M    RMY N/A
05/13 52/38/45/-11/…./…/…/..          35 E   AERO M  M    RMY 34
05/14 44/38/41/-16/…./…/…/..          26 NNE AERO M  M    RMY 25
05/15 58/40/49/-8/…./…/…/..           28 NW  AERO M  M    RMY 28
05/16 68/46/57/0/…./…/…/..            17 NW  AERO M  M    RMY 19
05/17 64/49/57/0/…./…/…/..    22 WNW AERO 21 WNW  RMY 25
05/18 72/49/61/+3/…./…/…/..           26 SSE AERO 25 SSE  RMY 29
05/19 69/50/60/+2/…./…/…/..           39 S   AERO 43 SSE  RMY 42
05/20 85/52/69/11/…./…/…/..    35 SW  AERO 40 SW   RMY 39
05/21 69/52/61/+2/0.00/…/…/..           40 NW  AERO 46 NW   RMY 45
05/22 68/49/59/0/0.00/…/…/..            32 NNW AERO 29 NW   RMY N/A
05/23 68/48/58/-1/…./…/…/..    36 SSW AERO 37 SSW  RMY 40
05/24 68/47/58/-1/…./…/…/..    47 NW  AERO 47 NW   RMY 51
05/25 75/47/61/+1/…./…/…/..    M  M   AERO 35 SSW  RMY 39
05/26 85/49/67/+7/…./0.0/…/..           40 W   AERO 38 W    RMY 39
05/27 76/57/67/+7/…./0.0/…/..           30 NE  AERO 22 NE   RMY 27
05/28 57/48/53/-8/…./0.0/…/..           26 E   AERO 22 ESE  RMY 25
05/29 51/45/48/-13/…./0.0/…/..          21 NNW AERO 21 NNW  RMY N/A
05/30 63/46/55/-6/…./0.0/…/..    23 S   AERO 23 S    RMY 25
05/31 72/54/63/2/…./0.0/…/..    28 N   AERO 23 N    RMY 26

PRELIMINARY CLIMATE SUMMARY FOR JUNE 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

06/01 71/54/63/+1/0.00/…/..               21 E   AERO 20 E   RMY 18
06/02 75/51/63/+1/…./…/..               23 S   AERO 21 S   RMY N/A
06/03 69/50/60/-2/…./…/..               41 W   AERO 39 W   RMY 43
06/04 70/45/58/-5/0.00/…/..               29 W   AERO 23 W   RMY N/A
06/05 81/57/69/+6/…./…/..               33 SSW AERO 33 SSW RMY N/A

06/06 Low temp since midnight is 64F; normal low is 54F

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

RECORDS FOR JUNE 6
HIGH 95F IN 1925
LOW 42F IN 1885, 1894, 1920, 1945
PRECIP 3.61 INS IN 2000
PEAK GUST 58 MPH NE IN 2000

RECORDS FOR JUNE 7
HIGH 93F IN 1999
LOW 40F IN 1932
PRECIP 4.01 INS IN 2006
PEAK GUST 58 MPH NE IN 1982

TODAY’S REPORT PREPARED BY: Benjamin Turner