Friday, October 31, 2014

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

DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, OCTOBER 31, 2014
ALL TIMES ARE IN EASTERN STANDARD TIME

PARTLY CLOUDY MORNING BECOMING OVERCAST BY AFTERNOON
MUCH COOLER TEMPERATURES.

This last day of October had some sunshine this morning but
the sky had become overcast by early afternoon.
Temperatures are much cooler than yesterday with the high
mostly staying in the low 50’s.

Today’s Observations:

7 A.M.
Weather: Broken stratocumulus, clouds dissipating past hour
Temperature: 44F; Dew Point: 37F; Wind: NE at 8 kts,
Sea-level pressure: 30.03 ins. Hg, rising, then more slowly
Visibility: 35 miles, except WNW 45 miles, NW 20 miles, hazy,
NE 50 miles
6-hr max temp: 44F
6-hr min temp: 42F
24-hr precip: 0.00
BHO SA 1155 E50 BKN 35 170/44/37/0408/003/ SC CLDS DSSPTNG
VSBY NW 20 HAZY WNW 45 DSNT HZ VSBY NE 50/ 8/500 51008
10044 20042

10 A.M.
Weather: Scattered cumulus, few moderate cumulus, broken stratocumulus,
broken dense cirrus, overcast cirrus, thin spots and breaks in overcast
Temperature: 50F; Dew Point: 39F; Wind: ENE at 9 kts,
Sea-level pressure: 30.04 ins. Hg, rising slightly
Visibility: 55 miles, except 60 miles NW
BHO SA 1455 25 SCT E50 BKN 220 BKN 250 OVC 55 172/50/39/0609/004/
FEW MDT CU  DNS CI THN SPTS/BINOVC WND 02V08/ 8/232 51002

1 P.M.
Weather: Scattered cumulus, stratocumulus cumulus generated,
overcast stratocumulus, bright spots in overcast
Temperature: 49F; Dew Point: 38F; Wind: E at 9 kts,
Sea-level pressure: 30.00 ins. Hg, falling, then more slowly
Visibility: 60 miles, except 70 miles NW, MOUNTAIN IN CLOUD,
light distant haze
6-hr max temp: 53F
6-hr min temp: 44F
6-hr precip: 0.00
BHO SA 1755 27 SCT E43 OVC 60 159/49/38/0809/000/ BRGHT SPTS IOVC
CU DRK BASES SE-S VSBY NW 70 MTN INCLD 70 NW LGT DSNT HZ/ 8/8//
56013 10053 20044

WEATHER SUMMARY FOR THURSDAY, OCTOBER 30, 2014

TEMPERATURE (DEGREES F)
MAX…..59   NORMAL…..56
MIN…..41   NORMAL…..38
MEAN….50   NORMAL…..47

DEPARTURE FROM 30-YEAR NORMAL…………………….+3
TOTAL DEPARTURE FOR THE MONTH…………………..+100 [+3.1 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..15  DEPARTURE………..-3
TOTAL HEATING UNITS FOR THE MONTH………….304  DEPARTURE……….-99
TOTAL HEATING UNITS FOR THE SEASON…………405  DEPARTURE………-140
TOTAL HEATING UNITS LAST SEASON TO DATE…….464  DIFFERENCE………-59

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………18 NW  AT    1:26 P.M.
ASOS…………………..21 NW  AT    1:26 P.M.
DAVIS………………….20 NW  AT    1:27 P.M. RMY 20
FASTEST MILE FOR YESTERDAY………………..13 NW  AT    1:38 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..15 NW  AT    1:27 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….13 WSW AT    1:10 P.M.
AVERAGE WIND SPEED AND DIRECTION………… 9.7 WNW
ASOS………………….9.8
DAVIS…………………8.3 WNW (290 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……….9.96  DEPARTURE……..+5.43
ASOS………….10.07
TOTAL PRECIPITATION FOR THE YEAR……….41.55  DEPARTURE……..-2.06
ASOS………….41.87

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  56/55/56/-1/1.63/000/00              33 NE  RMY 36
10/2  55/47/51/-6/0.29/000/00              30 NE  RMY N/A
10/3  54/46/50/-6/0.05/000/00              20 NE  RMY 20
10/4  63/52/58/+2/0.30/000/00              30 SE  RMY 32
10/5  60/45/53/-3/0.00/658/95              26 W   RMY 28
10/6  66/42/54/-1/0.00/669/97              25 SSE RMY N/A
10/7  72/54/63/+8/0.01/281/38              43 S   RMY 49
10/8  72/53/63/+9/0.01/562/82              40 S   RMY N/A
10/9  64/48/56/+2/0.00/648/95              35 W   RMY 39
10/10 63/43/53/-1/0.00/489/72              23 W   RMY N/A
10/11 50/43/47/-6/0.35/000/00              15 N   RMY N/A
10/12 60/40/50/-3/0.00/681/100             20 NW  RMY N/A
10/13 61/45/53/+0/0.00/054/08              23 S   RMY 25
10/14 75/58/67/+15/0.00/448/67             29 S   RMY 31
10/15 79/62/71/+18/0.02/459/69             32 SSW RMY 36
10/16 70/60/65/+14/0.60/000/00             37 S   RMY 41
10/17 71/57/64/+13/0.00/528/80             28 SW  RMY 30
10/18 71/52/62/+11/0.24/210/32             28 WNW RMY 30 TSTM
10/19 55/39/47/-3/0.00/020/03              28 NW  RMY 29
10/20 56/33/45/-5/0.00/515/79              23 SW  RMY 25
10/21 61/49/55/+5/0.16/045/07              17 NNE RMY N/A
10/22 54/48/51/+2/2.38/000/00              58 NE  RMY 58 TSTM
10/23 53/47/50/+1/3.66/000/00              43 N   RMY N/A
10/24 52/43/48/-1/0.16/000/00              25 NNW RMY N/A
10/25 63/41/52/+3/0.00/…/..              21 WSW RMY N/A
10/26 57/43/50/+2/T/…/..                 37 W   RMY 39
10/27 61/42/52/+4/0.00/…/..              26 WNW RMY 31
10/28 70/46/58/+10/0.00/…/..             23 S   RMY 24
10/29 73/47/60/+13/0.10/…/..             25 NNW RMY 27
10/30 59/41/50/+3/0.00/…/..              18 NW  RMY 20

10/31 morning low temp: 42F since midnight; normal low now 38F

DAILY RECORDS FOR OCTOBER 2014:
10/1 – A NEW RECORD DAILY PRECIPITATION OF 1.63 INCHES;
surpasses the previous record of 1.44 ins. in 1984

10/22 – A NEW RECORD DAILY PRECIPITATION OF 2.38 INCHES;
surpasses the previous record of 1.37 ins. in 1898

10/23 – A NEW RECORD DAILY PRECIPITATION OF 3.66 INCHES;
surpasses the previous record of 2.18 ins. in 1956

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

RECORDS FOR OCTOBER 31
HIGH 79F IN 1946
LOW 22F IN 1904
PRECIP 3.74 INCHES IN 1991
SNOWFALL TRACE IN 1906
PEAK GUST 70e S IN 1945

RECORDS FOR NOVEMBER 1
HIGH 75 IN 2003
LOW 22 IN 1913,1923
PRECIP 2.93 INCHES IN 1985
SNOWFALL TRACE IN 1906,1951
PEAK GUST 78 ESE IN 1997

TODAY’S REPORT PREPARED BY: Robert Skilling