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BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, OCTOBER 16, 2015
ALL TIMES ARE IN EASTERN STANDARD TIME
SHOWERS, VIRGA MOVE THROUGH THIS MORNING,
COLD AIR TO ENTER THE REGION OVERNIGHT
Yesterday’s midnight to midnight temperatures of
a maximum of 60F and minimum of 41F provided an almost
perfectly ‘normal’ temperature day, with plentiful
sunshine and excellent visibility.
This morning, temperatures dipped to a low of 47F,
with showers and virga visible at the 7:00 AM EST
observation. A couple brief showers, not totaling
more than a trace, were sparked around 8:00 AM EST
this morning. A large rainbow in vicinity of the station
was visible just before showers moved overhead.
By the 10:00 AM EST observation virga and showers had
moved to our east and winds shifted to the W, gusting
to a peak of 32 MPH so far. Visibility had improved
significantly to the west to 70 plus miles.
Today’s Observations:
7 A.M.
Weather: Broken stratocumulus, broken altocumulus, broken
cirrus, few cumulus distant ESE-WNW, showers distant SW-NNE,
virga overhead
Temperature: 51F; Dew Point: 45F; Wind: SW at 13 kts,
Sea-level pressure: 29.88 ins. Hg, rising, then more quickly
Visibility: 35 miles, except 20 miles SW-NNW, 15 miles N-NNE,
obscured by showers, virga and thin fog
6-hr Max temp: 51F
6-hr Min temp: 47F
24-hr precip: 0.00 ins.
BHO SA 1155 E80 BKN 150 BKN 250 BKN 35 119/51/45/2213/988/
VSBY SW-NNW 20 MI N-NNE 15 MI SHWRS DSNT SW-NNE VIRGA OVHD
FEW CU DSNT ESE-WNW THN FG ALQDS/ 8/551 53005 10051 20047
10 A.M.
Weather: Virga NW-E, scattered altocumulus, few stratocumulus
E-N, few stratocumulus lenticularis distant N, light rain
shower ending 9:10 AM EST.
Temperature: 53F; Dew Point 42F; Wind: W at 18G24 kts,
Sea-level pressure: 29.89 ins. Hg, falling, then rising and higher
Visibility: 70 miles, except 40 miles N-ESE, obscured by virga
3-hr precip: Trace
BHO SA 1455 100 SCT 70 123/53/42/2718G24/989/ RW-E10 VSBY N-ESE 40 MI
VIRGA DSNT NW-E FEW SC E-N FEW SCSL DSNT N/ 8/530 53004 MANUAL 6000/
SUMMARY FOR THURSDAY, OCTOBER 15, 2015
TEMPERATURE (DEGREES F)
MAX…..60 NORMAL…..61
MIN…..41 NORMAL…..43
MEAN….51 NORMAL…..52
DEPARTURE FROM 30-YEAR NORMAL……………………-1
TOTAL DEPARTURE FOR THE MONTH……………………+9 [+0.4 DEGREES/DAY]
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………0 DEPARTURE………..0
TOTAL COOLING UNITS FOR THE MONTH……………0 DEPARTURE……….-4
TOTAL COOLING UNITS FOR THE SEASON…………810 DEPARTURE……..+209
TOTAL COOLING UNITS LAST SEASON TO DATE…….587 DIFFERENCE…….+223
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..14 DEPARTURE……….+1
TOTAL HEATING UNITS FOR THE MONTH………….148 DEPARTURE………-16
TOTAL HEATING UNITS FOR THE SEASON…………191 DEPARTURE……..-115
TOTAL HEATING UNITS LAST SEASON TO DATE…….239 DIFFERENCE……..-48
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….20 SW AT 11:44 P.M.*
ASOS……………………23 SW AT 11:45 P.M.
DAVIS…………………..20 SW AT 10:46 P.M. RMY N/A
FASTEST MILE FOR YESTERDAY……………….. 17 SW AT 10:56 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………17 SW AT 11:53 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..16 SW AT 10:57 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..9.1 WNW
ASOS…………………..9.5
DAVIS………………….7.8 W [273 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………..1.06 DEPARTURE…..-1.16
ASOS……………1.04
TOTAL PRECIPITATION FOR THE YEAR………..34.46 DEPARTURE…..-6.10
ASOS…………….N/A ***
*** ASOS annual total not available due to erroneous readings
PRELIMINARY CLIMATE SUMMARY FOR OCTOBER CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/RMY 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
10/1 55/51/53/-4/…./000/00 39 NE RMY N/A
10/2 51/47/49/-8/…./000/00 40 NE RMY 43
10/3 51/45/48/-8/…./000/00 38 NE RMY N/A
10/4 55/49/52/-4/0.00/474/68 35 E RMY 40
10/5 59/46/53/-3/T/125/18 21 NE RMY 20
10/6 68/43/56/+1/0.00/663/96 17 NW RMY 17
10/7 69/46/58/+3/0.00/640/93 20 W RMY 20
10/8 63/49/56/+2/0.00/678/99 21 S RMY N/A
10/9 68/50/59/+5/0.27/…/.. 45 S RMY 49
10/10 59/44/53/-2/0.00/…/.. 33 NNW RMY N/A
10/11 67/46/57/+4/0.00/…/.. 26 SW RMY 28
10/12 76/50/63/+10/0.00/…/.. 22 SSW RMY 24
10/13 70/55/63/+10/0.27/…/.. 23 S RMY 24
10/14 66/46/56/+4/0.00/…/.. 26 W RMY 29
10/15 60/41/51/-1/0.00/…/.. 20 SW RMY 27
10/16 low since midnight is 47F; normal low is now 43F
DAILY RECORDS FOR OCTOBER 2015
-NONE SO FAR.
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR OCTOBER 16
HIGH 86F IN 1897
LOW 28F IN 1886
PRECIP 2.82 INCHES IN 1974
SNOWFALL TRACE IN 2009
PEAK GUST 68e MPH SSE IN 1954 (HURRICANE HAZEL)
RECORDS FOR OCTOBER 17
HIGH 86F IN 1947
LOW 25F IN 1886
PRECIP 1.87 INCHES IN 1989
SNOWFALL TRACE IN 1970
PEAK GUST 55 MPH NE IN 1964
TODAY’S REPORT PREPARED BY: Brian Fitzgerald
