Saturday, July 27, 2019

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, JULY 27, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

FAIR WEATHER DAY WITH WIND FROM THE SOUTH
BEGINNING TO BRING IN WARM AIR….

Today’s weather has been fair, with partly cloudy
skies and moderate wind speeds through the duration
of the day. As time moves on, pressure is beginning
to drop, and cloud cover has begun to increase after
the 1 o’clock observation. Wind from the south is
bringing warm air to the region, with a high so far of
83f and rising. Our low since midnight was 64F, or one
degree above our normal daily minimum of 63F.

Today’s Observations:

7 A.M.
Weather: Scattered cumulus, scattered cirrus
Temperature: 68F; Dew Point: 60F; Wind: S at 6 kts
Sea-level pressure: 30.31 ins. Hg, increasing, then more slowly
Visibility: 35 miles, distant fog SW-NW
6-hr Max temp: 67F
6-hr Min temp: 64F
24-hr Precip: 0.00 ins.
BHO SA 1155 40 SCT 250 SCT 35 265/68/60/1806/031/
DSNT FOG SW-NW/ 8/101 51010 10067 20064

10 A.M.
Weather: Scattered cumulus
Temperature: 77F; Dew Point: 64F; Wind: S at 6 kts
Sea-level pressure: 30.29 ins. Hg, decreasing steadily
Visibility: 40 miles, distant haze
3-hr Precip: 0.00 ins.
BHO SA 1455 40 SCT 40 258/77/64/1806/029/ DSNT HZ ALQDS/
8/100 57006

1 P.M.
Weather: Scattered cumulus, scattered cirrus
Temperature: 82F; Dew Point: 65F; Wind: S at 7 kts
Sea-level pressure: 30.24 ins. Hg, falling, then more quickly
Visibility: 40 miles, distant haze
6-hr Max temp: 83F
6-hr Min temp: 68F
6-hr Precip: 0.00 ins.
BHO SA 1755 40 SCT 210 SCT 40 024/82/65/1707/024/ DSNT HZ ALQDS/
8/104 58018 10083 20068

SUMMARY FOR FRIDAY, JULY 26, 2019

TEMPERATURE (DEGREES F)
MAX…..84   NORMAL…..81
MIN…..62   NORMAL…..63
MEAN….73   NORMAL…..72

DEPARTURE FROM 30-YEAR NORMAL………………….+1
TOTAL DEPARTURE FOR THE MONTH…………………+79 [+2.8 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………8   DEPARTURE………+1
TOTAL COOLING UNITS FOR THE MONTH………….255   DEPARTURE……..+70
TOTAL COOLING UNITS FOR THE SEASON…………344   DEPARTURE……..+30
TOTAL COOLING UNITS LAST SEASON TO DATE…….399   DEPARTURE……..-55

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..22 SSE AT 9:16 P.M.
AERO…………………….23 SSE AT 8:18 P.M.
ASOS…………………….20 S   AT 9:18 P.M.
DAVIS……………………20 SE  AT 3:55 P.M.  RMY 20
FASTEST MILE FOR YESTERDAY………………….14 SSE AT 9:09 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….15 S   AT 8:39 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………14 S   AT 8:56 P.M.
AVERAGE WIND SPEED AND DIRECTION……………6.6 NE
ASOS……………………7.4
DAVIS…………………..7.0 S [171 deg.]

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……….4.90  DEPARTURE……+1.62
ASOS…………..4.94
TOTAL PRECIPITATION FOR THE YEAR……….34.77  DEPARTURE……+4.52
ASOS………….34.71

PRELIMINARY CLIMATE SUMMARY FOR JULY 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

07/01 83/58/71/+1/0.00/896/98               21 NNW AERO 21 NNW RMY N/A
07/02 82/65/74/+4/0.00/329/36               23 W   AERO 23 W   RMY 23
07/03 89/67/78/+7/0.00/866/95               18 S   AERO 18 S   RMY 18
07/04 88/68/78/+7/0.00/748/82               17 SSW AERO M  M   RMY 17
07/05 87/69/78/+7/0.00/829/91               21 SW  AERO M  M   RMY 21
07/06 90/71/81/+10/0.83/646/71              26 WNW AERO M  M   RMY N/A
07/07 78/64/71/0/0.00/827/91                30 NE  AERO M  M   RMY N/A
07/08 79/59/69/-3/0.00/763/84               16 N   AERO 18 SSW RMY N/A
07/09 85/61/73/+1/0.00/871/96               18 NW  AERO 16 NW  RMY 18
07/10 88/69/79/+7/0.00/607/67               20 ESE AERO 16 ESE RMY 17
07/11 81/67/74/+2/0.62/000/00               35 S   AERO 33 S   RMY 36
07/12 84/68/76/+4/0.00/316/35               31 WNW AERO 30 WNW RMY 32
07/13 85/65/75/+3/0.00/812/90               21 W   AERO 20 WSW RMY 20
07/14 87/68/78/+6/0.00/702/78               25 W   AERO 21 W   RMY 23
07/15 82/63/73/+1/0.00/791/88               24 WNW AERO 23 WNW RMY 22
07/16 86/65/76/+4/0.00/682/76               23 W   AERO 21 W   RMY 21
07/17 90/70/80/+8/1.32/…/..               44 W   AERO M  M   RMY 47
07/18 72/61/67/-5/0.04/…/..               33 NE  AERO 36 NE  RMY 33
07/19 89/61/75/+3/0.00/…/..               24 WSW AERO 26 SW  RMY 25
07/20 93/75/84/+12/0.00/…/..              21 WSW AERO 22 WSW RMY N/A
07/21 92/76/84/+12/0.00/…/..              31 W   AERO 35 W   RMY 31
07/22 81/64/73/+1/…./…/..               35 ENE AERO 37 ENE RMY 34
07/23 66/58/62/-10/…./…/..              30 NNE AERO 33 NNE RMY 30
07/24 77/60/69/-3/…./…/..               14 NE  AERO 15 NE  RMY N/A
07/25 80/61/71/-1/…./…/..            17 SSE AERO 23 N   RMY 17
07/26 84/62/73/+1/0.00/…/..               22 SSE AERO 23 SSE RMY 20

07/27 Low temp since midnight is 64F; normal low is 63F

DAILY RECORDS FOR JULY 2019

7/20/19: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 75F,
BREAKS PREVIOUS RECORD OF 73F SET IN 1977, 2015

7/21/19: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 76F,
BREAKS PREVIOUS RECORD OF 75F SET IN 1991

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

RECORDS FOR JULY 27
HIGH 95F IN 1949, 1963
LOW 50F IN 1920, 2001
PRE 4.01 INS IN 1979
WIND 47 MPH ENE IN 1984

RECORDS FOR JULY 28
HIGH 97F IN 1931
LOW 49F IN 1903
PRECIP 3.32 INS IN 1911
PEAK GUST 62 MPH SW IN 2006

TODAY’S REPORT PREPARED BY: Samantha Richard