Thursday, June 13, 2019

| June 14, 2019 | Reply

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

DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, JUNE 13, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

AN OVERCAST DAY WITH SHOWERS AND INCREASING WIND DURING THE
EARLY AFTERNOON…

Overcast throughout the day with passing showers during the morning,
turning to steady rain during the early afternoon. 0.56 Inches has
rain has fallen in the past 6 hours since the 1 P.M observation with
pressure fall rapidly in the past 3 hour with a pressure trend of
-5.1 millibars. Winds have increased since this morning with a peak
wind of 32 MPH observed at 12:51 P.M. The high so far today is 54F,
20 degrees below the daily normal maximum of 74F. The low since
midnight is 50F, 6 degrees below the daily normal minimum of 56F.

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: 4.61 [+0.50]
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: Light rain, overcast nimbostratus
Temperature: 54F; Dew Point: 50F; Wind: ESE at 11 kts
Sea-level pressure: 30.04 ins. Hg, rising, then steady
Visibility: 45 miles
6-hr Max temp: 55F
6-hr Min temp: 35F
24-hr Precip: 0.01 ins.
24-hr snowfall: 0.0 ins.
Snow depth: 0 ins.
BHO SA 1155 E120 BKN 45R- 175/54/50/1114/004/ 8/02/ R-CTD/
70001 56015 10055 20035

10 A.M.
Weather: light drizzle, scattered stratus fractus,
overcast nimbostratus
Temperature: 51F; Dew Point: 51F; Wind: E at 14 kts,
Sea-level pressure: 29.99 ins. Hg, rising, then more quickly
Visibility: 35 miles, 10 miles N-NNE
3-hr Precip: 0.00 ins.
BHO SA 1145 E10 SCT E55 OVC 35L- 156/51/51/1014/999/
DSNT FG ALQDS VSBY 10 N-NNE/ 8/72/ 6008/ 58019

1 P.M.
Weather: Rain and Fog
Temperature: 50F; Dew Point: 50F; Wind: S at 17G30 kts,
Peak wind: 32 MPH (28kts) NE @ 1251E
Sea-level pressure: 29.84 ins. Hg, falling, then more quickly
Visibility: 1 miles
6-hr Max temp: 54F
6-hr Min temp: 50F
6-hr Precip: 0.56 ins.
BHO SA 1755 W3 X 1RF 105/50/50/0517G30/984/ VSBY 1 S-SSW WND/0532/51/
RCTD PK/ 8//// 6056/ 58051 10054 20050

SUMMARY FOR WEDNESDAY, JUNE 12, 2019

TEMPERATURE (DEGREES F)
MAX…..75   NORMAL…..74
MIN…..52   NORMAL…..56
MEAN….64   NORMAL…..65

DEPARTURE FROM 30-YEAR NORMAL………………….-1
TOTAL DEPARTURE FOR THE MONTH…………………+22 [+1.8 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………1   DEPARTURE………+1
TOTAL HEATING UNITS FOR THE MONTH…………..14   DEPARTURE……..-32
TOTAL HEATING UNITS FOR THE SEASON………..6232   DEPARTURE…….-116
TOTAL HEATING UNITS LAST SEASON TO DATE……5905   DIFFERENCE……+328

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………0   DEPARTURE………-1
TOTAL COOLING UNITS FOR THE MONTH…………..21   DEPARTURE………-6
TOTAL COOLING UNITS FOR THE SEASON………….29   DEPARTURE……..-22
TOTAL COOLING UNITS LAST SEASON TO DATE……..74   DEPARTURE……..-45

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..25  SSW  AT  6:59 P.M.
AERO…………………….25  S    AT  7:04 P.M.
ASOS…………………….26  S    AT  7:01 P.M.
DAVIS……………………27  S    AT  7:01 P.M.  RMY 28
FASTEST MILE FOR YESTERDAY………………….20  SSW  AT  7:04 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….18  S    AT  7:03 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………20  S    AT  7:02 P.M.
AVERAGE WIND SPEED AND DIRECTION……………..9.7 NW
ASOS……………………..10.2
DAVIS…………………….10.1 SW [228 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.01  DEPARTURE…….-0.15
ASOS…………..0.01
TOTAL PRECIPITATION FOR THE MONTH……….1.44  DEPARTURE…….-0.53
ASOS…………..1.44
TOTAL PRECIPITATION FOR THE YEAR……….27.23  DEPARTURE…….+2.60
ASOS………….27.17

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/…./0.0/…/..           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/…./0.0/…/..          35 E   AERO M  M    RMY 34
05/14 44/38/41/-16/…./0.0/…/..          26 NNE AERO M  M    RMY 25
05/15 58/40/49/-8/…./0.0/…/..           28 NW  AERO M  M    RMY 28
05/16 68/46/57/0/…./0.0/…/..            17 NW  AERO M  M    RMY 19
05/17 64/49/57/0/…./0.0/…/..     22 WNW AERO 21 WNW  RMY 25
05/18 72/49/61/+3/…./0.0/…/..           26 SSE AERO 25 SSE  RMY 29
05/19 69/50/60/+2/…./0.0/…/..           39 S   AERO 43 SSE  RMY 42
05/20 85/52/69/11/…./0.0/…/..    35 SW  AERO 40 SW   RMY 39
05/21 69/52/61/+2/0.00/0.0/…/..           40 NW  AERO 46 NW   RMY 45
05/22 68/49/59/0/0.00/0.0/…/..            32 NNW AERO 29 NW   RMY N/A
05/23 68/48/58/-1/…./0.0/…/..    36 SSW AERO 37 SSW  RMY 40
05/24 68/47/58/-1/…./0.0/…/..    47 NW  AERO 47 NW   RMY 51
05/25 75/47/61/+1/…./0.0/…/..    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/+6/…./…/..    28 SSW AERO 28 SSW RMY N/A
06/07 80/59/70/+6/0.00/…/..               23 S   AERO 23 S   RMY 22
06/08 78/57/68/+4/0.00/…/..               23 ENE AERO 21 SW  RMY 21
06/09 78/55/67/+3/0.00/…/..               22 S   AERO 21 S   RMY 21
06/10 79/54/67/+2/…./…/..     26 SSE AERO 25 SSE RMY 33
06/11 73/58/66/+1/…./…/..               32 NW  AERO 30 NW  RMY 35
06/12 75/52/64/-1/…./…/..               25 SSW AERO 25 S   RMY 28

06/13 Low temp since midnight is 53F; normal low is 56F

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

TODAY’S REPORT PREPARED BY: Nicholas Rousseau

Category: Daily Discussions

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