Wednesday, August 22, 2018

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

DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, AUGUST 22, 2018
ALL TIMES ARE IN EASTERN STANDARD TIME

SKY CLEARS AFTER RAINY OVERCAST MORNING…

Temperatures today have been close to normal with a high
so far of 80F, this is 1 degrees above the daily normal
of 79F. The temperature overnight was 62F, this is also 1
degree above the daily normal of 61F. The morning began
with moderate rainfall and so far today we have measured
0.31 ins. of precipitation. The wind was also moderate
today and shifted from the SE to the WNW by 1:00 P.M.
We had low pressure today which continued to fall
throughout the day.
Visibility was greatly obscured this morning being less
than a mile in the morning but cleared to 50 miles by
1:00 P.M. The sky was overcast this morning but also cleared
and we had a broken mixture of low level clouds including a
few towering cumulus at 1:00 P.M.

Today’s Observations:

7 A.M.
Weather: Rain and fog, overcast nimbostratus
Temperature: 65F; Dew Point: 65F; Wind: SE at 8G18 kts
Sea-level pressure: 29.74 ins. Hg, falling steadily
Visibility: 1/2 mile
6-hr Max temp: 65F
6-hr Min temp: 61F
24-hr Precip: 0.30 ins.
BHO SA 1155 E4 OVC 1/2RF 072/65/65/1308G18/974/ 8/02/
57025 MANUAL 70030 ASOS 70021 10065 20062

10 A.M.
Weather: Very light drizzle and fog
Temperature: 71F; Dew Point: 71F; Wind: SW at 7G14 kts
Sea-level pressure: 29.69 ins. Hg, falling, then more slowly
Visibility: 1/4 mile
3-hr Precip: 0.01 ins.
BHO SA 1455 W3 X 1/4L-F 054/71/71/2107G14/969/ PCPN VRY
LGT/ 8//// 56018 MANUAL 6001/ ASOS 60011

1 P.M.
Weather: Scattered cumulus, broken stratocumulus,
few towering cumulus WSW-WNW and ENE, virga S
Temperature: 78F; Dew Point: 71F; Wind: WNW at 8G15 kts
Sea-level pressure: 29.65 ins. Hg, falling unsteadily
Visibility: 50 miles, distant haze in all directions
6-hr Max temp: 80F
6-hr Min temp: 65F
6-hr Precip: 0.00 ins.
BHO SA 1755 27 SCT E38 BKN 50 040/78/71/3008G15/965/ FEW TCU
WSW-WNW AND ENE VIRGA S DSNT HZ ALQDS/ 8/400 56014 MANUAL 6001/
ASOS 60011 10080 20065

SUMMARY FOR TUESDAY, AUGUST 21, 2018

TEMPERATURE (DEGREES F)
MAX…..69   NORMAL…..79
MIN…..61   NORMAL…..61
MEAN….65   NORMAL…..70

DEPARTURE FROM 30-YEAR NORMAL…………………….-5
TOTAL DEPARTURE FOR THE MONTH……………………+75 [+3.4 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………0  DEPARTURE……….-6
TOTAL COOLING UNITS FOR THE MONTH………….208  DEPARTURE………+70
TOTAL COOLING UNITS FOR THE SEASON…………663  DEPARTURE……..+174
TOTAL COOLING UNITS LAST SEASON TO DATE…….577  DEPARTURE………+86

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY…………………20 ESE AT 3:09 P.M.
AERO……………………..17 ESE AT 3:09 P.M.
ASOS……………………..20 ESE AT 3:11 P.M.
DAVIS…………………….18 E   AT 3:10 P.M. RMY N/A
FASTEST MILE FOR YESTERDAY…………………..14 ESE AT 3:08 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………..14 ESE AT 3:46 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………….13 E   AT 3:05 P.M.
AVERAGE WIND SPEED AND DIRECTION…………….7.2 ENE
ASOS…………………….7.7
DAVIS……………………7.6 ENE [77 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.30  DEPARTURE……+0.17
ASOS…………..0.21
TOTAL PRECIPITATION FOR THE MONTH……….3.86  DEPARTURE……+0.98
ASOS…………..3.74
TOTAL PRECIPITATION FOR THE YEAR……….37.87  DEPARTURE……+4.18
ASOS………….39.32

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/199/23           31 S   AERO 30 S   RMY 31
8/2  92/74/83/+11/0.00/761/88       30 SW  AERO 28 SW  RMY 31
8/3  88/74/81/+9/0.19/492/57        35 NW  AERO 32 NW  RMY 35 TSTM
8/4  82/69/76/+4/1.16/301/35        28 SW  AERO 25 SW  RMY 30 TSTM
8/5  89/66/78/+6/0.00/815/95        20 W   AERO 18 W   RMY 19
8/6  92/71/82/+10/0.00/822/96       20 W   AERO 16 WSW RMY N/A
8/7  92/73/83/+11/0.00/682/80       25 S   AERO 23 S   RMY 26
8/8  88/71/80/+8/0.70/460/54        25 SSW AERO 25 SSW RMY N/A TSTM
8/9  86/70/78/+6/0.07/509/60        29 SW  AERO 28 SW  RMY N/A TSTM
8/10 85/66/76/+5/T/651/77           17 NW  AERO 16 NW  RMY N/A
8/11 70/66/68/-3/…./000/00        18 SE  AERO 17 SE  RMY 18
8/12 73/66/70/-1/…./000/00        23 NNE AERO 18 NNE RMY 21
8/13 69/64/67/-4/0.17/000/00        23 ENE AERO 21 ENE RMY 21
8/14 83/69/76/+5/0.00/502/60        25 S   AERO 23 S   RMY 24
8/15 86/68/77/+6/0.00/509/61        20 W   AERO 17 W   RMY 19
8/16 87/70/79/+8/0.00/…/..        20 W   AERO 18 W   RMY 20
8/17 83/67/75/+4/…./…/..        23 SSW AERO 23 SSW RMY N/A
8/18 83/63/73/+2/…./…/..        31 NE  AERO 30 NE  RMY 33 TSTM
8/19 68/62/65/-5/…./…/..        30 NE  AERO 30 NE  RMY 32
8/20 72/61/67/-3/0.00/…/..        28 ENE AERO 25 ENE RMY 27
8/21 69/61/65/-5/T/…/..           20 ESE AERO 17 ESE RMY N/A

8/22 Low temp since midnight is 62F; normal low is now 61F

DAILY RECORDS FOR AUGUST 2018

08/03/18: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 74F,
BREAKS PREVIOUS RECORD OF 71F SET IN 1928, 1969, AND 1979

08/07/18: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 73F,
BREAKS PREVIOUS RECORD OF 72F SET IN 1988

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

RECORDS FOR AUGUST 22
HIGH 90F IN 1939
LOW 42F IN 1894
PRECIP 2.28 INCHES IN 1935
PEAK GUST 44 MPH SSW IN 1987

RECORDS FOR AUGUST 23
HIGH 88F IN 1918, 1947, 1949, 1996
LOW 45F IN 1923
PRECIP 2.09 INCHES IN 2010
PEAK GUST 60e MPH NW IN 1940

TODAY’S REPORT PREPARED BY: Kaitlin Geagan