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BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, OCTOBER 14, 2013 COLUMBUS DAY
ALL TIMES ARE IN EASTERN STANDARD TIME
HIGH PRESSURE STILL PRESENT
GROUND FOG AND NEAR AND BELOW FREEZING BELOW SUMMIT EARLY MORNING
MILD OCTOBER CONTINUES
Under a clear sky and with calm winds under high pressure the
temperatures fell rapidly overnight last night with strong
radiational cooling. Our Hingham coop station’s average date
for first freeze is October 13 and we got our first frost
this morning just a day later. Taunton and Norwood Airports
both had frosty 29-degree lows while 1000-ft. high Worcester
Airport and 600-ft. high Blue Hill were well above freezing
with lows of 39 and 42 degrees respectively. Widespread frost
was reported along the MA-NH border this morning where a low
of 29F was recorded at Pepperill, MA.
Our mild and dry October continues with temperatures now
averaging more than 4 degrees warmer than normal and our
total precipitation more than one inch drier than normal.
Today’s Observations:
7 A.M.
Weather: Clear, few stratocumulus along shore ENE-E, few cirrus radiatus,
numerous patches of dense ground fog ESE-S-W-NNW, few patches of thin
ground fog N-E
Temperature: 49F; Dew Point: 43F; Wind: SSE at 3 knts,
Wind: Light
Sea-level pressure: 30.38 ins. Hg, rising slightly
Visibility: 20 miles, except 45 miles WNW above fog/inversion
6-hr min temp: 42F
BHO SA 1155 CLR 20 287/49/43/1603/038/ FEW SC ALG SHR ENE-E FEW CI RADIATUS
NMRS PTCHS DNS SHLW GF ESE-S-W-NNW FEW PTCHS THN GF VC N-E
HVY DEW ALL SFCS VSBY WNW 45 ABV INVSN/FG WND LGT/
8/001 51003 10049 20042
10 A.M.
Weather: Thin scattered cirrus, small cumulus forming E-S,
lower cirrus distant WSW-N
Temperature: 54F; Dew Point: 42F; Wind: WSW at 5 knts,
Wind: Light
Sea-level pressure: 30.37 ins. Hg, falling slightly
Visibility: 55 miles
BHO SA 1455 300 –SCT 55 285/54/42/2405/037/ SML CU DSNT E-S LWR
CI DSNT WSW-N THN K LYR ALG/ABV HRZN NW-E DSNT HZ WND LGT/
8/101 58002
1 P.M.
Weather: Thin scattered cirrus, thin broken cirrus, few altocumulus
lenticularis distant NW-NNW, lower cirrus SW-N
Temperature: 63F; Dew Point: 40F; Wind: SSW at 6 knts,
Wind: Light
Sea-level pressure: 30.30 ins. Hg, falling then more rapidly
Visibility: 60 miles, except 70 miles NW, distant haze
6-hr max temp: 63F
BHO SA 1755 250 –SCT 300 –BKN 60 262/63/40/2006/030/ FEW ACSL
DSNT NW-NNW LWR CI SW-N VSBY NW 70 DSNT HZ WND LGT/
8/041 10063 20049
WEATHER SUMMARY FOR SUNDAY, OCTOBER 13, 2013
TEMPERATURE (DEGREES F)
MAX…..59 NORMAL…..61
MIN…..46 NORMAL…..44
MEAN….53 NORMAL…..53
DEPARTURE FROM 30-YEAR NORMAL…………………..0
TOTAL DEPARTURE FOR THE MONTH…………………+63 [+4.6 DEGREES/DAY]
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………..0 DEPARTURE……….0
TOTAL COOLING UNITS FOR THE MONTH…………..5 DEPARTURE………+1
TOTAL COOLING UNITS FOR THE SEASON………..701 DEPARTURE…….+100
TOTAL COOLING UNITS LAST SEASON TO DATE……766 DIFFERENCE…….-65
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY………….12 DEPARTURE………-1
TOTAL HEATING UNITS FOR THE MONTH………….74 DEPARTURE……..-64
TOTAL HEATING UNITS FOR THE SEASON………..220 DEPARTURE……..-60
TOTAL HEATING UNITS LAST SEASON TO DATE……238 DIFFERENCE…….-18
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………23 ENE AT 8:33 A.M.
AERO…………………..23 ENE AT 11:08 A.M.
ASOS…………………..24 ENE AT 11:08 A.M.
DAVIS………………….21 NE AT 6:39 A.M. RMY 23
FASTEST MILE FOR YESTERDAY………………..16 ENE AT 11:09 A.M. *
MAXIMUM 2-MINUTE ASOS AVERAGE……………..18 ENE AT 11:09 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….16 ENE AT 11:10 A.M.
AVERAGE WIND SPEED AND DIRECTION………… 9.2 ENE
ASOS………………….8.5
DAVIS…………………8.4 ENE [060 degrees]
* last of several occurrences…
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……….0.92 DEPARTURE………….-1.01
ASOS…………..0.91
TOTAL PRECIPITATION FOR THE YEAR……….42.84 DEPARTURE………….+1.83
ASOS…………..N/A*
*ASOS malfunctioned during storm on 2/8-9, leading to erroneous totals
PRELIMINARY CLIMATE SUMMARY FOR OCTOBER 2013 CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST
AERO: Aerovane wind recording system gust
RMY: RMY = R.M. Young wind gust recording system added 8/9/2011
TSTM: Thunderstorm day (thunder heard some time during day)
….: Data not yet available, records not finalized
10/1 75/50/63/+6/0.00/676/96 16 WNW AERO 16 MPH WNW RMY 18
10/2 78/56/67/+10/0.00/666/95 29 W AERO 30 MPH W RMY 29
10/3 77/56/67/+11/0.00/628/90 20 WNW AERO 20 MPH WNW RMY N/A
10/4 67/56/62/+6/0.26/028/04 18 NW AERO 20 MPH NW RMY N/A
10/5 67/56/62/+6/0.01/125/18 14 ENE AERO 12 MPH ENE RMY N/A
10/6 58/53/56/+1/0.56/000/00 20 NE AERO 20 MPH NE RMY N/A
10/7 75/57/66/+11/0.07/213/31 48 S AERO 55 MPH S RMY 55
10/8 65/50/58/+4/0.00/581/85 25 NW AERO 27 MPH NW RMY 28
10/9 59/49/54/0/0.00/545/80 25 ENE AERO 24 MPH ENE RMY 25
10/10 61/46/54/0/0.00/…/.. 18 NE AERO 17 MPH NE RMY 18
10/11 67/50/59/+6/0.00/…/.. 20 NE AERO 20 MPH NE RMY N/A
10/12 59/50/55/+2/0.02/…/.. 30 ENE AER0 31 MPH ENE RMY 32
10/13 59/46/53/0/0.00/…/.. 23 ENE AERO 23 MPH ENE RMY 23
10/14 the morning low temp: 42F; the normal low is now 43F
DAILY RECORDS FOR OCTOBER 2013
None so far.
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR OCTOBER 14
HIGH 79F IN 2000
LOW 28F IN 1958
PRECIP 2.69 INCHES IN 1990
SNOWFALL 2.0 INCHES IN 1913
PEAK GUST 63e W IN 1976
RECORDS FOR OCTOBER 15
HIGH 83F IN 1897
LOW 29F IN 1887,1937
PRECIP 4.58 INCHES IN 2005
SNOWFALL TRACE IN 1961,1972
PEAK GUST 69 MPH W IN 2003
TODAY’S REPORT PREPARED BY: Robert Skilling
