Monday, August 6, 2018

| August 6, 2018 |

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

DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, AUGUST 6, 2018
ALL TIMES ARE IN EASTERN STANDARD TIME

ANOTHER DRY DAY WITH ABOVE NORMAL TEMPERATURES….

So far today has been a dry day with a mostly sunny sky.
Temperatures continue to be above seasonable with a high
of 91F, which is 10 degrees above the daily normal of 81F
and 4 degrees below the daily record high of 95F set in 1931.
The overnight minimum temperature so far is 71F, one degree
below the daily record for high minimum temperature of 72F
set back in 1918 and 1924. Wind today was mostly from the
west, and today has been slightly windier than yesterday.
Visibility was obscured today due to haze in the area and
was down to 25 miles at 1:00 P.M. Although humidity dropped
throughout the day today, the dew point remained close to
a very muggy 70F all day.

PRELIMINARY STATS FOR JULY 2018

TEMPERATURE, Deg. F
Avg. Max. 83.9 [+3.1]
Avg. Min. 63.7 [+0.8]
Mean      73.8 [+1.9]
24-hour corrected mean: 73.6
Max. for month: 94F on  1st and 3rd
Min. for month: 54F on  7th

COOLING DEGREE DAYS
Total cooling units:   296 [+74]
Total for the season:  455 [+104]
Total for last season: 421

PRECIPITATION, Inches
Total: 3.84 [-0.18]
Greatest in 24 hrs: 1.36 in on 17th-18th

WIND, mph
Avg. uncorrected wind speed: 9.8
Avg. corrected wind speed: 10.4
Prevailing wind direction: S at 19%
Peak gust and direction: 41 SSW on 26th

SUNSHINE:
Campbell-Stokes card minutes: 18642 minutes of possible 26682 or 70%
Astronomical total minutes: 19402 minutes of possible 27744 or 70%

BHO Warmest July Mean Temperature (24-hr corrected mean), deg F (1885-2018):

1)  75.1 in 2010
2)  74.9 in 1952
3)  74.1 in 1994
74.1 in 2013
5)  74.0 in 2011
74.0 in 2016
7)  73.8 in 1999
8)  73.6 in 2018
9)  73.5 in 1949
10) 73.2 in 2012

Today’s Observations:

7 A.M.
Weather: Scattered cirrostratus
Temperature: 76F; Dew Point: 68F; Wind: W at 8G12 kts
Sea-level pressure: 30.01 ins. Hg, rising then falling
Visibility: 35 miles, distant haze
6-hr Max temp: 75F
6-hr Min temp: 71F
24-hr Precip: 0.00 ins.
BHO SA 1155 250 SCT 35 192/76/68/2808G12/001/ DSNT HZ/ 8/006
50002 10075 20071

10 A.M.
Weather: Scattered cirrostratus
Temperature: 85F; Dew Point: 70F; Wind: WSW at 5 kts,
Wind: Light
Sea-level pressure: 30.08 ins. Hg, falling, then more slowly
Visibility: 35 miles, distant haze
3-hr Precip: 0.00 ins.
BHO SA 1455 250 SCT 35 187/85/70/2505/008/ DSNT HZ WND LGT/ 8/006
56005

1 P.M.
Weather: Scattered cirrostratus, few cumulus distant WSW and NNE
Temperature: 90F; Dew Point: 69F; Wind: W at 7G12 kts
Sea-level pressure: 30.12 ins. Hg, steady then falling
Visibility: 25 miles, distant haze
6-hr Max temp: 91F
6-hr Min temp: 76F
6-hr precip: 0.00 ins.
BHO SA 1755 250 SCT 25 177/90/69/2707G12/005/ FEW CU DSNT WSW
AND NNE DSNT HZ/ 8/106 58010 10091 20076

SUMMARY FOR SUNDAY, AUGUST 5, 2018

TEMPERATURE (DEGREES F)
MAX…..89   NORMAL…..81
MIN…..66   NORMAL…..63
MEAN….78   NORMAL…..72

DEPARTURE FROM 30-YEAR NORMAL…………………….+6
TOTAL DEPARTURE FOR THE MONTH……………………+32 [+6.2 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………..13   DEPARTURE……….+6
TOTAL COOLING UNITS FOR THE MONTH…………..67   DEPARTURE………+31
TOTAL COOLING UNITS FOR THE SEASON…………522   DEPARTURE……..+135
TOTAL COOLING UNITS LAST SEASON TO DATE…….466   DEPARTURE………+56

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY…………………20 W AT 11:57 P.M.
AERO……………………..18 W AT 11:58 P.M.
ASOS……………………..18 W AT 11:59 P.M.
DAVIS…………………….18 M AT 11:58 P.M. RMY 19
FASTEST MILE FOR YESTERDAY…………………..15 W AT 11:59 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………..14 W AT 11:59 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………….15 M AT 11:58 P.M.
AVERAGE WIND SPEED AND DIRECTION…………….7.0 WNW
ASOS…………………….7.3
DAVIS……………………5.0 *
*Davis direction and average not accurate

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE……-0.15
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….1.35  DEPARTURE……+0.60
ASOS…………..1.39
TOTAL PRECIPITATION FOR THE YEAR……….35.36  DEPARTURE……+3.80
ASOS………….36.97

PRELIMINARY CLIMATE SUMMARY FOR JULY-AUGUST 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

7/01 94/72/83/+13/0.00/667/73       21 ESE AERO 18 ESE RMY 19
7/02 90/68/79/+9/0.00/858/94        21 S   AERO 21 S   RMY 22
7/03 94/69/82/+11/0.00/657/72       20 SSW AERO 18 SW  RMY 19 TSTM
7/04 89/73/81/+10/0.00/884/97       17 NE  AERO 15 NE  RMY 16
7/05 91/73/82/+11/0.00/865/95       29 SSW AERO 28 SSW RMY N/A
7/06 80/59/70/-1/0.56/018/02        37 NNW AERO 38 SW  RMY 40 TSTM
7/07 78/54/66/-5/0.00/900/99        22 N   AERO 18 N   RMY N/A
7/08 83/57/70/-2/0.00/890/98        23 S   AERO 21 S   RMY 22
7/09 88/60/74/+2/0.00/852/94        23 SW  AERO 23 SW  RMY 24
7/10 91/63/77/+5/0.10/751/83        24 W   AERO 22 W   RMY N/A
7/11 73/62/68/-4/0.63/705/78        28 NE  AERO 25 NE  RMY 27 TSTM
7/12 77/56/67/-5/0.00/867/96        16 NW  AERO 15 NW  RMY N/A
7/13 84/61/73/+1/0.00/568/63        23 SSE AERO 23 SSE RMY 24
7/14 80/61/71/-1/0.00/540/60        18 S   AERO 16 S   RMY 19
7/15 84/65/75/+3/T/521/58           16 S   AERO 15 S   RMY 14
7/16 83/67/75/+3/0.00/682/76        23 S   AERO 23 S   RMY 23
7/17 88/67/78/+6/1.34/430/48        31 SW  AERO 30 SW  RMY 32 TSTM
7/18 81/63/72/0/0.02/769/86         21 NW  AERO 22 NW  RMY 23
7/19 80/56/68/-4/0.00/874/98        21 S   AERO 17 SSE RMY 19
7/20 83/62/73/1/0.00/864/97         21 SE  AERO 17 ESE RMY 19
7/21 76/59/68/-4/0.00/738/83        23 ENE AERO 20 ENE RMY N/A
7/22 76/63/69/-3/0.29/009/01        29 ESE AERO 28 ESE RMY N/A
7/23 82/71/77/+5/0.09/327/37        32 S   AERO 30 S   RMY 32
7/24 85/72/79/+7/T/698/79           31 S   AERO 29 S   RMY 29
7/25 82/71/77/+5/0.11/159/18        35 SSE AERO 32 SSE RMY N/A
7/26 83/69/76/+5/0.69/158/18        41 SSW AERO 39 SSW RMY N/A TSTM
7/27 88/69/79/+7/0.00/605/69        25 S   AERO 23 SSW RMY 26
7/28 87/71/79/+7/0.01/569/65        28 S   AERO 26 S   RMY 29
7/29 82/67/75/+3/0.00/768/88        18 W   AERO 16 W   RMY 18
7/30 82/64/73/+1/0.00/470/54        18 W   AERO 16 W   RMY 17
7/31 86/63/75/+3/0.00/739/85        16 SSW AERO 15 W   RMY N/A

DAILY RECORDS FOR JULY 2018

07/01/18: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 72F,
TIES PREVIOUS RECORD OF 72F SET IN 1968

PRELIMINARY CLIMATE SUMMARY FOR AUGUST 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

8/1  82/66/74/+2/T/…/..           31 S   AERO 30 S   RMY 31
8/2  92/74/83/+11/0.00/…/..       30 SW  AERO 28 SW  RMY 31
8/3  88/74/81/+9/0.19/…/..        35 NW  AERO 32 NW  RMY 35 TSTM
8/4  82/69/76/+4/1.16/…/..        28 SW  AERO 25 SW  RMY 30 TSTM
8/5  89/66/78/+6/0.00/…/..        20 W   AERO 18 W   RMY 19

8/6 Low temp since midnight is 71F; normal low is now 63F

DAILY RECORDS FOR AUGUST 2018

08/04/18: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 74F,
BREAK PREVIOUS RECORD OF 71F SET IN 1928, 1969, AND 1979

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

RECORDS FOR AUGUST 6
HIGH 95F IN 1931
LOW 48F IN 1934
PRECIP 1.47 INCHES IN 1995
PEAK GUST 44e MPH SSW IN 1940

RECORDS FOR AUGUST 7
HIGH 95F IN 1924
LOW 51F IN 2004
PRECIP 3.32 INCHES IN 1926
PEAK GUST 51 MPH NE 1975

TODAY’S REPORT PREPARED BY: Kaitlin Geagan

 

Category: Daily Discussions

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