Thursday, October 24, 2019

| October 24, 2019 | Reply

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

DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, OCTOBER 24, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

A MILD, DRY, AND FAIR FALL DAY ATOP GREAT BLUE HILL….

We observed 75 miles of visibility throughout the day,
along with dew points in the low 30’s. Skies have been
almost clear, save a few distant cirrostratus. Wind is
steady southwesterly, blowing at around 10 mph. The
max gust so far today is 21 mph.

With both the abundant sunshine and some warm air
advection from the southwest, temperatures are
warmer than seasonal averages. The high so far today
is 66F, 8 degrees above the daily normal maximum of
58F. The low since midnight is 45F, 5 degrees above
the normal low of 40F.

Today’s Observations:

7 A.M.
Weather: Clear, few distant cirrostratus
Temperature: 45F; Dew Point: 33F; Wind: SW at 8 kts
Sea-level pressure: 30.29 ins. Hg, rising steadily
Visibility: 75 miles
6-hr Max temp: 47F
6-hr Min temp: 43F
24-hour Precip.: 0.02 in.
BHO SA 1155 CLR 75 256/45/33/2408/029/ FEW DSNT CS ALQDS/ 8/005 70002
53020 10047 20043

10 A.M.
Weather: Clear, few distant cirrostratus
Temperature: 58F; Dew Point: 34F; Wind: SW at 8 kts
Sea-level pressure: 30.32 ins. Hg, falling then rising
Visibility: 75 miles
3-hour Precip.: 0.00 in.
BHO SA 1455 CLR 75 264/58/34/2408/032/ FEW DSNT CS ALQDS/ 8/005 51008

1 P.M.
Weather: Clear, few distant cirrostratus
Temperature: 66F; Dew Point: 34F; Wind: SSW at 10 kts
Sea-level pressure: 30.25 ins. Hg, falling, then more quickly
Visibility: 75 miles
6-hr Max temp: 66F
6-hr Min temp: 45F
BHO SA 1755 CLR 75 243/66/34/2110/025/ FEW DSNT CS ALQDS/ 8/005 58021
10066 20045

SUMMARY FOR WEDNESDAY, OCTOBER 23, 2019

TEMPERATURE (DEGREES F)
MAX…..65   NORMAL…..58
MIN…..48   NORMAL…..40
MEAN….57   NORMAL…..49

DEPARTURE FROM 30-YEAR NORMAL…………………+8
TOTAL DEPARTURE FOR THE MONTH………………..+18 [+0.6 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………….8  DEPARTURE………-8
TOTAL HEATING UNITS FOR THE MONTH…………..261  DEPARTURE……..-22
TOTAL HEATING UNITS FOR THE SEASON………….354  DEPARTURE……..-71
TOTAL HEATING UNITS LAST SEASON TO DATE……..360  DEPARTURE………-6

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………….0  DEPARTURE……….0
TOTAL COOLING UNITS FOR THE MONTH…………….2  DEPARTURE………-3
TOTAL COOLING UNITS FOR THE SEASON………….682  DEPARTURE……..+80
TOTAL COOLING UNITS LAST SEASON TO DATE……..874  DEPARTURE…….-192

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..35 W   AT  3:13 P.M.
AERO…………………….35 W   AT  3:08 P.M.
ASOS…………………….35 W   AT  2:12 P.M.
DAVIS……………………36 W   AT  2:10 P.M. RMY 36
FASTEST MILE FOR YESTERDAY………………….31 W   AT  2:12 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….26 W   AT  2:13 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………29 W   AT  2:11 P.M.
AVERAGE WIND SPEED AND DIRECTION……………13.1 W
ASOS……………………12.8
DAVIS…………………..13.5 W [278 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.02  DEPARTURE……-0.14
ASOS…………..0.06
TOTAL PRECIPITATION FOR THE MONTH……….5.04  DEPARTURE……+1.59
ASOS…………..5.30
TOTAL PRECIPITATION FOR THE YEAR……….43.46  DEPARTURE……+0.92
ASOS………….43.53

PRELIMINARY CLIMATE SUMMARY FOR OCTOBER 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

10/01  67/52/60/+3/0.06/…/..               28 SW  AERO 25 SSW RMY 29
10/02  74/49/62/+5/0.42/…/..               30 ENE AERO 25 ENE RMY 28
10/03  51/46/49/-7/…./…/..               28 ENE AERO 26 ENE RMY N/A
10/04  59/40/50/-6/…./…/..               38 NNW AERO 38 NNW RMY 38
10/05  58/35/47/-9/0.00/…/..               21 N   AERO 18 SSW RMY N/A
10/06  65/44/55/0/0.00/…/..                36 SSW AERO 35 SSW RMY N/A
10/07  77/57/67/+12/0.12/…/..              47 SSW AERO 46 SSW RMY 49
10/08  60/52/56/+2/T/…/..                  22 NE  AERO 18 NW  RMY N/A
10/09  55/49/52/-2/…./…/..               43 NE  AERO 37 NE  RMY 44
10/10  54/47/51/-3/…./…/..               41 NE  AERO 37 NE  RMY 42
10/11  52/48/50/-3/…./000/00               41 NE  AERO 39 NE  RMY 41
10/12  52/49/51/-2/…./…/..               39 NE  AERO 37 NE  RMY N/A
10/13  66/48/57/+4/…./…/..               18 WNW AERO 17 WNW RMY 18
10/14  67/51/59/+7/…./…/..               18 WSW AERO 17 WSW RMY N/A
10/15  61/43/52/0/…./…/..                18 NNW AERO 17 NNW RMY N/A
10/16  61/45/53/+2/…./…/..               58 ESE AERO 58 ESE RMY N/A
10/17  60/46/53/+2/…./…/..               61 E   AERO 63 E   RMY N/A
10/18  57/41/49/-2/…./…/..               29 WNW AERO 32 W   RMY 32
10/19  58/36/47/-3/…./…/..               18 NW  AERO 18 NW  RMY 19
10/20  60/43/52/+2/T/…/..                  14 NE  AERO 16 NE  RMY N/A
10/21  59/49/54/+4/0.01/…/..               25 E   AERO 21 NE  RMY 23
10/22  58/47/53/+4/…./…/..               29 E   AERO 28 E   RMY 23
10/23  65/48/57/+8/…./…/..               35 W   AERO 35 W   RMY 36

10/24 The low since midnight is 43F, normal daily minimum is 40F

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

RECORDS FOR OCTOBER 24
HIGH 79F IN 1963
LOW 22F IN 1969
PRECIP 2.96 INCHES IN 1890
SNOWFALL 1.8 INCHES IN 1960
PEAK GUST 70 MPH SE IN 1959

RECORDS FOR OCTOBER 25
HIGH 81F IN 1963
LOW 26F IN 1922,1939
PRECIP 2.45 INCHES IN 2005
SNOWFALL 1.2 INCHES IN 1960
PEAK GUST 72 MPH ESE IN 1980

TODAY’S REPORT PREPARED BY: Benjamin Turner

Category: Daily Discussions

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