Friday, June 7, 2019

| June 7, 2019 | Reply

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

DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, JUNE 7, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

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

We observed a distant haze that became more
significant since this morning, bringing
visibility to 30 miles following the 1 P.M.
observation. A gradual wind shift from W-E
occurred between midnight and 8 A.M. Wind
was light throughout the day, with a max
gust so far of 15 mph. Conditions were
considerably dry, with humidity decreasing
to 35% after noontime. The high so far today
77F, 4 degrees above the normal of 73F. The
low since midnight is 59F, 4 degrees above the
daily normal minimum of 55F.

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: scattered altocumulus, scattered cirrostratus
Temperature: 66F; Dew Point: 50F; Wind: NNE at 6 kts
Sea-level pressure: 29.93 ins. Hg, rising, then steady
Visibility: 70 miles, distant haze
6-hr Max temp: 75F
6-hr Min temp: 59F
24-hr Precip: 0.06 ins.
24-hr snowfall: 0.0 ins.
Snow depth: 0 ins.
BHO SA 1155 90 SCT 250 SCT 70 138/66/50/0206/993/ DSNT HZ ALQDS
8/035 70006 51013 10075 20059

10 A.M.
Weather: scattered altocumulus, broken cirrostraus
Temperature: 70F; Dew Point: 43F; Wind: E at 7 kts
Sea-level pressure: 29.96 ins. Hg, steady, then rising
Visibility: 40 miles, distant haze
3-hr Precip: 0.00 ins.
BHO SA 1455 50 SCT 250 BKN 40 149/70/43/0907/996/ DNST HZ ALQDS
8/075 53011

1 P.M.
Weather: Scattered altostratus, broken cirrostratus, few cumulus,
Temperature: 77F; Dew Point: 50F; Wind: SE at 5 kts
Wind: light
Sea-level pressure: 29.91 ins. Hg, rising, then falling
Visibility: 35 miles
6-hr Max temp: 77F
6-hr Min temp: 67F
6-hr Precip: 0.00 ins.
BHO SA 1755 75 SCT 250 SCT 35 130/77/50/1305/991/ FEW CU DSNT HZ ALQDS
WND LGT 8/118 58008 10077 20067

SUMMARY FOR THURSDAY, JUNE 6, 2019

TEMPERATURE (DEGREES F)
MAX…..75   NORMAL…..72
MIN…..64   NORMAL…..54
MEAN….70   NORMAL…..63

DEPARTURE FROM 30-YEAR NORMAL………………….+7
TOTAL DEPARTURE FOR THE MONTH………………….+8 [+1.1 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……..-97
TOTAL HEATING UNITS LAST SEASON TO DATE……5892   DIFFERENCE……+340

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………5   DEPARTURE………+3
TOTAL COOLING UNITS FOR THE MONTH……………9   DEPARTURE………-2
TOTAL COOLING UNITS FOR THE SEASON………….17   DEPARTURE……..-18
TOTAL COOLING UNITS LAST SEASON TO DATE……..69   DEPARTURE……..-52

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..28 SSW AT 12:13 A.M.
AERO…………………….28 SSW AT 2:48 A.M.
ASOS…………………….23 SW  AT 9:00 A.M.
DAVIS……………………20 S   AT 7:00 A.M.  RMY N/A
FASTEST MILE FOR YESTERDAY………………….21 SSW AT 12:43 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….21 SSW AT 12:42 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………21 S   AT 12:00 A.M.
AVERAGE WIND SPEED AND DIRECTION……………9.8 SSW
ASOS……………………10.0
DAVIS…………………..10.1 SSE [162 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.06  DEPARTURE…….-0.11
ASOS…………..0.07
TOTAL PRECIPITATION FOR THE MONTH……….0.13  DEPARTURE…….-0.87
ASOS…………..0.13
TOTAL PRECIPITATION FOR THE YEAR……….26.02  DEPARTURE…….+2.36
ASOS………….25.86

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/…/…/..          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 75/64/70/7/…./…/..     28 SSW AERO 28 SSW RYM 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 7
HIGH 93F IN 1999
LOW 40F IN 1932
PRECIP 4.01 INS IN 2006
PEAK GUST 58 MPH NE IN 1982

RECORDS FOR JUNE 8
HIGH 94F IN 1984
LOW 37F IN 1932
PRECIP 1.53 INS IN 1947
PEAK GUST 86e MPH WNW IN 1946 [Record for month]

TODAY’S REPORT PREPARED BY: Nicholas Rousseau

Category: Daily Discussions

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