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

DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, AUGUST 1, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

FAIR AND DRY WITH A LIGHT NORTHWESTERLY WIND....
JULY FINISHES AS THE THIRD WARMEST ON RECORD...

We observed increasing visibility throughout the day,
with 60 miles this morning and 70 miles this afternoon.
A wind from the northwest has been coming in around 
10 mph, with a max gust so far of 18 mph. Dew points
have retreated into the mid 50s as the day went on,
signifying drier air moving into the region. The 
high so far today is 83F, 2 degrees above the daily
normal maximum of 81F. the low since midnight is 66F,
3 degrees higher than the normal low of 63F.  

BHO Warmest July 24-Hour Mean Temperature, deg F (1885-2019):
 
1) 75.1 in 2010
2) 74.9 in 1952
3) 74.5 in 2019
4) 74.1 in 1994
   74.1 in 2013
6) 74.0 in 2011
   74.0 in 2016


Today's Observations:

7 A.M.
Weather: Broken cirrostratus
Temperature: 70F; Dew Point: 66F; Wind: NW at 10 kts
Sea-level pressure: 30.06 ins. Hg, rising steadily
Visibility: 60 miles, Haze
6-hr Max temp: 70F
6-hr Min temp: 66F
24-hr Precip: 0.00 ins.
BHO SA 1155 E250 BKN 60 178/70/66/3310/006/ DSNT HZ ALQDS/ 
8/008 53012 10070 20066

10 A.M.
Weather: Broken cirrostratus
Temperature: 78F; Dew Point: 63F; Wind: WNW at 7 kts
Sea-level pressure: 30.08 ins. Hg, rising, then steady
Visibility: 60 miles, Haze
3-hr Precip: 0.00 ins.
BHO SA 1455 E250 BKN 60 185/78/63/3407/008/ DSNT HZ ALQDS/ 
8/008 51007

1 P.M.
Weather: Scattered cumulus, broken cirrostratus
Temperature: 83F; Dew Point: 64F; Wind: WNW at 7 kts
Sea-level pressure: 30.08 ins. Hg, steady
Visibility: 70 miles
6-hr Max temp: 83F
6-hr Min temp: 70F
6-hr Precip: 0.00 ins. 
BHO SA 1755 50 SCT E250 BKN 70 185/83/64/2907/008/ 8/108 
50000 10083 20070

SUMMARY FOR WEDNESDAY, JULY 31, 2019 

TEMPERATURE (DEGREES F)
MAX.....90   NORMAL.....81
MIN.....68   NORMAL.....63
MEAN....79   NORMAL.....72

DEPARTURE FROM 30-YEAR NORMAL.....................+7
TOTAL DEPARTURE FOR THE MONTH.....................+111 [+3.4 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY..............14   DEPARTURE.........+7
TOTAL COOLING UNITS FOR THE MONTH.............322   DEPARTURE.......+100
TOTAL COOLING UNITS FOR THE SEASON............411   DEPARTURE........+60
TOTAL COOLING UNITS LAST SEASON TO DATE.......455   DEPARTURE........-44

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY....................37 SW  AT 3:05 P.M.
                   AERO.........................35 SW  AT 3:06 P.M.
                   ASOS.........................39 WNW AT 3:05 P.M.
                   DAVIS........................38 WNW AT 3:05 P.M. RMY 38
FASTEST MILE FOR YESTERDAY......................30 SW  AT 3:10 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE...................28 W   AT 3:05 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE..................30 W   AT 3:10 P.M.
AVERAGE WIND SPEED AND DIRECTION...............9.0 SSW
                   ASOS........................9.3
                   DAVIS.......................8.9 SW [230 deg.]


PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.55  DEPARTURE......+0.40
                         ASOS..............0.56
TOTAL PRECIPITATION FOR THE MONTH..........5.46  DEPARTURE......+1.44
                         ASOS..............5.51
TOTAL PRECIPITATION FOR THE YEAR..........35.33  DEPARTURE......+4.34
                         ASOS.............35.28

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 83/64/74/+2/..../.../..               21 S   AERO 23 S   RMY 21
07/28 89/64/77/+5/..../.../..               25 WSW AERO 36 WSW RMY 26
07/29 89/71/80/+8/..../.../..               23 W   AERO 25 W   RMY 21
07/30 93/71/82/+10/0.00/.../..              24 S   AERO 24 S   RMY 23
07/31 90/68/79/+7/0.55/.../..               37 SW  AERO 35 SW  RMY 38

8/1 Low temp since midnight is 66F; 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 AUGUST 1
HIGH 97F IN 1917
LOW 49F IN 1891
PRECIP 3.61 INCHES IN 1927
PEAK GUST 41 MPH NNW IN 1985

RECORDS FOR AUGUST 2
HIGH 101F IN 1975 [STATION RECORD MAXIMUM - Tied with 8/10/1949]
LOW 50F IN 1929, 1947
PRECIP 1.59 INCHES IN 1946
PEAK GUST 50 MPH SW IN 2006

TODAY'S REPORT PREPARED BY: Benjamin Turner