Tuesday, October 23, 2018

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

DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, OCTOBER 23, 2018
ALL TIMES ARE IN EASTERN STANDARD TIME

MOSTLY CLOUDY SKIES WITH RAIN BEGINNING
IN THE AFTERNOON…

Clouds have increased notably throughout the day,
with clouds dropping in height as the pressure
continues to fall significantly.  Readings show
a drop of almost 5 millibars since 7am.  Along with this
change, rain showers began around noontime, with observed
virga throughout the region during the 1 P.M. observation.
Winds have stayed light and southeasterly throughout the day,
hovering in the 10 to 15 mph range, with gusts at or below
20 mph.  So far, the temperature runs at a maximum of 53F,
5 degrees below normal, and a recorded low of 40F, on par
with the normal daily minimum.

Today’s Observations:

7 A.M.
Weather: Broken altocumulus, few distant stratocumulus SW-SE
Temperature: 45F; Dew Point: 41F; Wind: SE at 12G17 kts
Sea-level pressure: 30.14 ins. Hg, falling steadily
Visibility: 55 miles
6-hr Max temp: 45F
6-hr Min temp: 41F
24-hr Precip: 0.00 ins.
BHO SA 1155 E100 BKN 55 206/45/41/1512G17/014/
FEW DSNT SC SW-SE/ 8/830 58006 10045 20041

10 A.M.
Weather: Overcast altocumulus, few stratocumulus in all directions
Temperature: 51F; Dew Point: 45F; Wind: SE at 10G15 kts
Sea-level pressure: 30.16 ins. Hg, falling steadily
Visibility: 50 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 E100 OVC 50 214/51/45/1310G15/016/
FEW SC ALQDS/ 8/83/ 58008

1 P.M.
Weather: Few stratus fractus, overcast altocumulus,
virga in all directions, light rain shower beginning at
1230E and ending at 1235E
Temperature: 53F; Dew Point: 50F; Wind: W at 10G15 kts
Sea-level pressure: 30.02 ins. Hg, falling rapidly
Visibility: 20 miles
6-hr Max temp: 53F
6-hr Min temp: 44F
6-hr Precip: 0.00 ins.
BHO SA 1755 E70 OVC 20 166/53/50/1210G15/002/
FEW STFRA ALQDS VIRGA ALQDS RW-B30E35/ 8/72/
58032 10053 20044

SUMMARY FOR MONDAY, OCTOBER 22, 2018

TEMPERATURE (DEGREES F)
MAX…..50   NORMAL…..58
MIN…..27   NORMAL…..41
MEAN….39   NORMAL…..49

DEPARTURE FROM 30-YEAR NORMAL………………….-10
TOTAL DEPARTURE FOR THE MONTH………………….+15 [+0.5 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..26   DEPARTURE……..-10
TOTAL HEATING UNITS FOR THE MONTH………….255   DEPARTURE……..-12
TOTAL HEATING UNITS FOR THE SEASON…………342   DEPARTURE……..-67
TOTAL HEATING UNITS LAST SEASON TO DATE…….196   DIFFERENCE……+146

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………0  DEPARTURE………..0
TOTAL COOLING UNITS FOR THE MONTH…………..11  DEPARTURE……….+6
TOTAL COOLING UNITS FOR THE SEASON…………874  DEPARTURE……..+272
TOTAL COOLING UNITS LAST SEASON TO DATE…….727  DIFFERENCE…….+147

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..24 W   AT  1:54 P.M.
AERO…………………….22 W   AT  1:57 P.M.
ASOS…………………….24 W   AT  1:57 P.M.
DAVIS……………………25 W   AT 11:47 A.M. RMY 21
FASTEST MILE FOR YESTERDAY………………….17 W   AT 11:45 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….18 W   AT  1:57 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………20 W   AT  1:59 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..9.6  W
ASOS…………………..9.7  W
DAVIS………………….10.0 W [264 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……….2.81  DEPARTURE……-0.64
ASOS…………..2.79
TOTAL PRECIPITATION FOR THE YEAR……….50.01  DEPARTURE……+7.66
ASOS………….51.71

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 65/53/59/+2/…./042/06         21 ENE AERO 18 SSW RMY N/A
10/02 64/53/59/+2/…./000/00         33 S   AERO 32 S   RMY 35 TSTM
10/03 60/52/56/0/…./000/00          18 NNE AERO 14 NNE RMY 14
10/04 69/57/63/+7/…./209/30         29 SSW AERO 29 SSW RMY 32
10/05 64/47/56/0/…./638/92          25 NE  AERO 21 NE  RMY 24
10/06 64/45/55/0/0.00/276/40          23 SSW AERO 23 SSW RMY 25
10/07 75/56/66/+11/…./076/11        28 NE  AERO 24 ENE RMY 27
10/08 56/53/55/+1/…./000/00         22 ENE AERO 20 ENE RMY N/A
10/09 75/56/66/+12/…./211/31        26 WSW AERO 28 SW  RMY 29
10/10 82/65/74/+20/…./496/73        24 WSW AERO 23 WSW RMY 25
10/11 70/56/63/+10/…./…/..        48 NNE AERO 47 NNE RMY 50
10/12 59/44/52/-1/…./…/..         32 NW  AERO 32 NW  RMY 33
10/13 49/40/45/-8/…./…/..         21 WNW AERO 20 WNW RMY 20
10/14 55/37/46/-6/…./…/..         21 W   AERO 18 W   RMY 21
10/15 66/44/55/+3/…./…/..         46 W   AERO 46 W   RMY N/A
10/16 56/41/49/-2/…./…/..         48 W   AERO 48 W   RMY N/A
10/17 60/39/50/-1/…./…/..         48 W   AERO 50 W   RMY 53
10/18 45/33/39/-12/…./…/..        32 WNW AERO 35 WNW RMY 36
10/19 60/31/46/-4/…./…/..         33 SSW AERO 36 SSW RMY 36
10/20 62/46/54/+4/…./…/..         35 SSW AERO 37 SSW RMY 33
10/21 46/31/39/-11/…./…/..        39 NNW AERO 41 NW  RMY 41
10/22 50/27/39/-10/…./…/..        24 W   AERO 22 W   RMY 21

10/23 Low temp since midnight is 40F; normal low is 40F

DAILY RECORDS FOR OCTOBER

10/10/18: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 65F,
BREAKS PREVIOUS RECORD OF 62F SET IN 1949

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

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

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

TODAY’S REPORT PREPARED BY: Nate Iannuccillo & Benjamin Turner