Tuesday, October 22, 2019

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

DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, OCTOBER 22, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

OVERCAST AND CHILLY MOST OF THE DAY WITH AN ONSHORE WIND…

Clouds have been the theme for the day despite a few breaks and
a brief glimpse of sun this morning, a lower cloud deck has since
overspread the region from off the ocean. Temperatures as a result
have remained on the cooler side with the high so far today only
58 degrees which occurred before noon. This reading is exactly
normal for the date. The low this morning was 47 degrees, which
is 6 degrees above the normal low of 41.

Visibility has been somewhat limited today with a maximum occuring
late this morning of around 50 miles, it has since slipped back
down to around 40 miles this afternoon

Today’s Observations:

7 A.M.
Weather: Scattered stratocumulus, Overcast cirrostratus
Temperature: 49F; Dew Point: 49F; Wind: NE at 10 kts, gusting to 15 kts
Sea-level pressure: 30.15 ins. Hg, rising, then rising more rapidly
Visibility: 30 miles, 15 miles south-southeast thru north-northwest
6-hr Max temp: 49F
6-hr Min temp: 47F
24-hour Precip.: 0.00 in.
BHO SA 1155 10 SCT E190 OVC 30 209/49/49/0510G15/015/ FEW BINOVC DSNT E-SE
AND DSNT W THN F SSW-W-NNW VSBY 15 SSW-W-NNW/ 8/506/ 53004 10049 20047

10 A.M.
Weather: Broken stratocumulus, Broken cirrostratus
Temperature: 57F; Dew Point: 49F; Wind: ENE at 12 kts, gusting to 18 kts
Sea-level pressure: 30.13 ins. Hg, falling then more rapidly
Visibility: 50 miles
3-hour Precip.: 0.00 in.
BHO SA 1455 E20 BKN 180 BKN 50 202/57/49/0712G18/013/ 8/506 58007

1 P.M.
Weather: Overcast stratus
Temperature: 55F; Dew Point: 49F; Wind: NE at 7 kts
Sea-level pressure: 30.10 ins. Hg, falling, then more rapidly
Visibility: 40 miles
6-hr Max temp: 58F
6-hr Min temp: 49F
BHO SA 1755 E20 OVC 40 193/55/49/0507/010/ 8/6// 58009 10058 20049

SUMMARY FOR MONDAY, OCTOBER 21, 2019

TEMPERATURE (DEGREES F)
MAX…..59   NORMAL…..59
MIN…..49   NORMAL…..41
MEAN….54   NORMAL…..50

DEPARTURE FROM 30-YEAR NORMAL…………………+4
TOTAL DEPARTURE FOR THE MONTH…………………+6 [ +0.1 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………11  DEPARTURE………-4
TOTAL HEATING UNITS FOR THE MONTH…………..241  DEPARTURE……..-10
TOTAL HEATING UNITS FOR THE SEASON………….334  DEPARTURE……..-59
TOTAL HEATING UNITS LAST SEASON TO DATE……..316  DEPARTURE……..+16

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………………..25 E   AT 12:04 P.M.
AERO…………………….21 NE  AT  9:42 A.M.
ASOS…………………….25 E   AT 12:06 P.M.
DAVIS……………………26 E   AT 12:01 P.M. RMY 23
FASTEST MILE FOR YESTERDAY………………….19 ENE AT 12:41 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….18 ENE AT 12:20 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………18 E   AT 12:18 P.M.
AVERAGE WIND SPEED AND DIRECTION……………10.0 ENE
ASOS……………………10.4
DAVIS…………………..10.6 ENE [064 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE……-0.16
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….4.63  DEPARTURE……+1.49
ASOS…………..4.89
TOTAL PRECIPITATION FOR THE YEAR……….43.05  DEPARTURE……+0.82
ASOS………….43.12

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 The low since midnight is 47F, normal daily minimum is 41F

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

RECORDS FOR OCTOBER 22
HIGH 85F IN 1979
LOW 22F IN 1940
PRECIP 2.38 INCHES IN 2014
SNOWFALL TRACE IN 1969, 2010
PEAK GUST 67 MPH ESE IN 1988

RECORDS FOR OCTOBER 23
HIGH 82F IN 1947
LOW 24F IN 1969
PRECIP 3.66 INCHES IN 2014
SNOWFALL 3.0 INCHES IN 1891
PEAK GUST 78e MPH NW IN 1941

TODAY’S REPORT PREPARED BY: Matt Douglas