Sunday, November 3, 2013
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, NOVEMBER 3, 2013
ALL TIMES ARE IN EASTERN STANDARD TIME
FIRST FLAKES OF THE SEASON FALL IN RAIN AND SNOW MIX EARLY
TEMPERATURES PLUMMET OVERNIGHT, PRESSURE STEADILY RISES
Today’s cold front passage brought in a batch of light rain and snow showers, giving
Great Blue Hill its first (few, wet) snowflakes of the season. Overnight temperatures fell
from the low 50s to a low of 36 around 10:00 A.M. The overcast began breaking around noon,
with temperatures not expected to climb much past the low 40s, in sad contrast with
yesterday’s high of 65F. 0.01 inch of precip was collected prior to the 7:00 A.M.
observation and an additional 0.05 inch fell by early afternoon, which still leaves
us well behind the seasonal and annual average. After the cloud cover lifted,
visibility increased in west and north to nearly 90 miles, with the tree line of
Grand Monadnock clearly visible. Mount Washington Observatory is also reporting
near maximum visibility, 120 miles in this cool drying air.
OCTOBER 2013 PRELIMINARY STATISTICS:
(departures relative to 1981-2010 average)
TEMPERATURE:
Average Max Temp: 62.5F [+2.2F]
Average Min Temp: 45.9F [+3.0F]
Mean Temp: 54.2F [+2.6F]
24-hr. Corr. Mean Temp: 53.4F
Max Temp: 78F on 2nd
Min Temp: 30F on 29th (first freeze of the season)
Total heating degree day units (month): 331 [-90] *NCDC method
Total heating degree day units (season): 477 [-86] *start July 1 (NCDC)
Total cooling degree day units (month): 5 [0] *NCDC method
Total cooling degree day units (season): 701 [+99] *start Jan 1 (NCDC)
PRECIPITATION:
Total precipitation: 1.09 inches [-3.60 inch]
Greatest 24-hr precipitation: N/A
WIND:
Avg wind speed: 10.7 MPH
Avg corrected wind speed: 11.2 MPH
Prevailing wind direction: W [17%]
Peak gust: 48 MPH S on 7TH
Peak fastest mile: 40 MPH S on 7TH
SUNSHINE:
Total astronomical minutes: 11,757 (196.0 hrs.) out of possible
20,551 minutes (342.5 hrs.) or 57%
Total Campbell Stokes card minutes; 11,358 (189.3 hrs.) out of possible
19,824 minutes (330.4 hrs.) or 57%
BHO DRIEST OCTOBERS (INCHES, 1886-2013)
1) 0.22 IN 1924
2) 0.39 IN 1994
3) 0.50 IN 1946
4) 0.61 IN 1935
5) 0.63 IN 1897
6) 0.79 IN 2001
7) 1.09 IN 2013
8) 1.15 IN 1918
9) 1.25 IN 1940
10) 1.31 IN 1967
Today’s Observations:
7 A.M.
Weather: Light drizzle, broken and overcast low stratocumulus
Temperature: 39F; Dew Point: 38F; Wind: NNW at 7 kts.
Sea-level pressure: 29.99 ins. Hg, rising then rising more slowly
Visibility: 10 miles, light drizzle
Visibility: 5 miles NW-NNE
6-hr min temp: 39
Manual 24-hr precip: 0.01 inch
ASOS 24-hr precip: 0.01 inch
BHO SA 1155 E15 BKN 25 OVC 10L- 155/39/38/3407/999/ VSBY 20 SW-W 5 NW-NNE/
8/72/ 51037 MANUAL 70001 ASOS 70001 10048 20039
10 A.M.
Weather: Light rain and wet snow, scattered ragged cumulus fractus,
overcast stratocumulus
Temperature: 36F; Dew Point: 36F; Wind: NNW at 8 kts,
Sea-level pressure: 30.09 ins. Hg, rising then rising more slowly
Visibility: 45 miles, light rain and snow
Visibility: 15 miles N-ESE
Manual 3-hr precip: 0.04 inch
ASOS 3-hr precip: 0.03 inch
BHO SA 1455 E15 SCT 30 OVC 45R-S- 189/36/36/3408/009/ SNW WET VSBY 15 N-ESE/
8/72/ 51034 MANUAL 60004 ASOS 60003
1 P.M.
Weather: Sun dimly visible through scattered and broken cumulus fractus and
stratocumulus (2 layers)
Temperature: 40F; Dew Point: 35F; Wind: N at 8 kts,
Sea-level pressure: 30.13 ins. Hg, rising then rising more slowly
Visibility: 75 miles
Visibility: 90 miles WSW-NNE
6-hr max temp: 40F
6-hr min temp: 36F
Manual 6-hr precip: 0.05 inch
ASOS 6-hr precip: 0.04 inch
BHO SA 1755 30 SCT 45 BKN 75 204/40/35/3508/013/ SUN DMLY VSBL THRU BKN SC
VSBY 90 WSW-NNE/ 8/8// 51015 MANUAL 60005 ASOS 60004 10040 20036
WEATHER SUMMARY FOR SATURDAY, NOVEMBER 2, 2013
TEMPERATURE (DEGREES F)
MAX…..65 NORMAL…..55
MIN…..49 NORMAL…..37
MEAN….57 NORMAL…..46
DEPARTURE FROM 30-YEAR NORMAL………………..+11
TOTAL DEPARTURE FOR THE MONTH………………..+27 [+13.5 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………8 DEPARTURE……..-11
TOTAL HEATING UNITS FOR THE MONTH…………..11 DEPARTURE……..-27
TOTAL HEATING UNITS FOR THE SEASON…………488 DEPARTURE…….-113
TOTAL HEATING UNITS LAST SEASON TO DATE…….443 DIFFERENCE…….+45
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………22 WSW AT 8:55 P.M.
AERO…………………..N/A
ASOS…………………..23 NW AT 8:39 P.M.
DAVIS………………….N/A RMY 23
FASTEST MILE FOR YESTERDAY………………..17 SSW AT 8:10 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..17 SSW AT 8:39 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….N/A
AVERAGE WIND SPEED AND DIRECTION…………6.0 SSW
ASOS…………………5.8
DAVIS………………..5.8 WSW [257 degrees]
* last of several occurrences…
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.01 DEPARTURE………….-0.14
ASOS…………..0.01
TOTAL PRECIPITATION FOR OCTOBER…………0.11 DEPARTURE………….-0.20
ASOS…………..0.11
TOTAL PRECIPITATION FOR THE YEAR……….43.12 DEPARTURE………….-0.96
ASOS…………..N/A**
**ASOS malfunctioned during storm on 2/8-9, leading to erroneous totals
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M………0.0 DEPARTURE………….-0.1
TOTAL SNOWFALL FOR THE MONTH……………0.0 DEPARTURE………….-0.1
TOTAL SNOWFALL FOR THE SEASON…………..0.0 DEPARTURE………….-0.4
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 61/46/54/0/0.00/095/14 18 NE AERO 17 MPH NE RMY 18
10/11 67/50/59/+6/0.00/473/70 20 NE AERO 20 MPH NE RMY N/A
10/12 59/50/55/+2/0.02/007/01 30 ENE AER0 31 MPH ENE RMY 32
10/13 59/46/53/0/0.00/482/72 23 ENE AERO 23 MPH ENE RMY 23
10/14 64/42/53/+1/0.00/580/87 15 SSW AERO 15 MPH SSW RMY 15
10/15 66/50/58/+6/0.00/266/40 16 ESE AERO 16 MPH ESE RMY N/A
10/16 60/49/55/+4/0.00/013/02 23 ESE AERO 24 MPH ESE RMY 23
10/17 70/52/61/+10/0.06/277/42 21 S AERO 23 MPH S RMY N/A
10/18 67/50/59/+8/T/630/96 32 WNW AERO 32 MPH W RMY 31
10/19 65/45/55/+5/0.00/379/58 21 W AERO 22 MPH W RMY N/A
10/20 61/44/53/+3/0.00/644/99 33 W AERO 36 MPH W RMY 34
10/21 67/43/55/+5/0.00/648/100 23 SSW AERO 25 MPH SSW RMY 27
10/22 69/44/57/+8/T/419/65 25 SSW AERO 27 MPH SSW RMY 27
10/23 50/40/45/-4/0.00/103/16 18 WNW AERO 18 MPH WNW RMY N/A
10/24 53/36/45/-4/0.00/640/100 31 W AERO 31 MPH W RMY 34
10/25 49/34/42/-7/0.00/401/63 25 WNW AERO 26 MPH WNW RMY 26
10/26 54/34/44/-4/0.00/521/82 35 SW AERO 36 MPH SSW RMY 39
10/27 55/39/47/-1/0.04/480/76 30 W AERO 30 MPH W RMY 29
10/28 58/35/47/-1/0.00/529/84 31 W AERO 33 MPH W RMY 34
10/29 50/30/40/-7/0.00/614/98 15 N AERO 15 MPH N RMY 15
10/30 51/38/45/-2/0.02/094/15 16 W AERO 15 MPH W RMY N/A
10/31 61/43/52/+5/0.05/000/00 37 SSW AERO N/A N/A RMY N/A
11/1 68/56/62/+16/0.10/…/.. 60 SSW AERO N/A N/A RMY 66
11/2 65/49/57/+11/0.01/…/.. 22 WSW AERO N/A N/A RMY 23
11/3 morning low temp: 36F; the normal low is now 37F
DAILY RECORDS FOR NOVEMBER 2013
None so far.
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR NOVEMBER 3
HIGH 75F IN 1990
LOW 21F IN 1891
PRECIP 1.92 INCHES IN 1951
SNOWFALL 0.1 IN 1951
PEAK GUST 96e SSE IN 1951
RECORDS FOR NOVEMBER 4
HIGH 77 IN 1987
LOW 22 IN 1891
PRECIP 3.27 INCHES IN 1910
SNOWFALL 6.4 IN 1945
PEAK GUST 73 WNW IN 1965
TODAY’S REPORT PREPARED BY: Forrest Iwanik
