Sunday, October 25, 2015

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, OCTOBER 25, 2015
ALL TIMES ARE IN EASTERN STANDARD TIME

SHORT PERIOD OF LIGHT RAIN THIS MORNING
VERY COOL DAY YESTERDAY WITH MAXIMUM ONLY 46F

A couple of hours with some light rain this morning left just
0.04 inch during this very dry month to date.

Saturday was a cold day for late October averaging 9
degrees below normal. The maximum of 46F was 12 degrees
below the average to be expected for the date of 58F.
The minimum of 33F was 7 degrees below the average.

Today’s Observations:

7 A.M.
Weather: Overcast nimbostratus, few stratocumulus,
light rain, thin fog, rain began at 6:10 A.M.
Temperature: 50F; Dew Point: 48F; Wind: S at 17 kts,
Sea-level pressure: 30.04 ins. Hg, falling then more rapidly
Visibility: 15 miles, except SW-N 10 miles, E-S 20 miles,
visibility lowering, light rain and thin fog
6-hr Max temp: 50F
6-hr Min temp: 46F
24-hr precip: 0.01 in.
BHO SA 1155 E95 OVC 15R- 174/50/48/1817/004/ FEW LWR SC
VSBY SW-N 10 E-S 20 LWRG ALQDS RB10/ 8/52/ 58024 MANUAL 6001/
ASOS 60001 MANUAL 70001 ASOS 70001 10050 20046

10 A.M.
Weather: Scattered stratus fractus, broken stratocumulus,
overcast nimbostratus
Temperature: 55F; Dew Point 54F; Wind: SSW @ 17 kts
Sea-level pressure: 30.05 ins. Hg, about steady
Visibility: 15 miles, except 10 miles SE-SW, thin fog
3-hr precip: 0.03 inch
BHO SA 1455 7 SCT E25 35 OVC 15 176/55/54/2017/005/
VSBY SE-SW 10 THN FG/ 8/72/ 50002 MANUAL 6003/ ASOS 60003

1 P.M.
Weather: Broken stratus fractus, overcast alt0stratus
Temperature: 56F; Dew Point 54F; Wind: WSW @ 11 kts
Sea-level pressure: 30.00 ins. Hg, falling then more rapidly
Visibility: 25 miles light distant fog
6-hr max temp: 56F
6-hr min temp: 50F
6-hr precip: 0.03 in.
BHO SA 1755 E18 BKN 60 OVC 25 162/56/54/2411/001/ CIG RGD
THN DSNT FG/ 8/62/ 58014 MANUAL 6003/ ASOS 60003
10056 20050

SUMMARY FOR SATURDAY, OCTOBER 24, 2015

TEMPERATURE (DEGREES F)
MAX…..46   NORMAL…..58
MIN…..33   NORMAL…..40
MEAN….40   NORMAL…..49

DEPARTURE FROM 30-YEAR NORMAL…………………..-9
TOTAL DEPARTURE FOR THE MONTH………………….-15  [-0.8 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……….-5
TOTAL COOLING UNITS FOR THE SEASON…………810   DEPARTURE……..+208
TOTAL COOLING UNITS LAST SEASON TO DATE…….595   DIFFERENCE…….+215

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..25   DEPARTURE……….+9
TOTAL HEATING UNITS FOR THE MONTH………….308   DEPARTURE……….+9
TOTAL HEATING UNITS FOR THE SEASON…………351   DEPARTURE………-90
TOTAL HEATING UNITS LAST SEASON TO DATE…….337   DIFFERENCE……..+14

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….15  SSE AT 11:53 P.M.
ASOS……………………15  SSE AT 11:53 P.M. .
DAVIS…………………..14  N   AT 12:57 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY…………………13  SSE AT 11:48 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………13  SSE AT 11:56 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..12  NNE AT  5:56 A.M.
AVERAGE WIND SPEED AND DIRECTION……………6.7 N
ASOS………………….. 7.0
DAVIS…………………. 5.9 NNE [025 Deg.]

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 THE MONTH………..1.08  DEPARTURE…..-2.52
ASOS……………1.06
TOTAL PRECIPITATION FOR THE YEAR………..35.22  DEPARTURE…..-7.46
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/+5/0.27/130/19               45 S   RMY 49
10/10 59/44/53/-2/0.00/673/99               33 NNW RMY N/A
10/11 67/46/57/+4/0.00/582/86               26 SW  RMY 28
10/12 76/50/63/+10/0.00/647/96              22 SSW RMY 24
10/13 70/55/63/+10/0.27/208/31              23 S   RMY 24
10/14 66/46/56/+4/0.00/428/64               26 W   RMY 29
10/15 60/41/51/-1/0.00/659/99               20 SW  RMY 27
10/16 60/44/52/+1/T/471/71                  31 W   RMY 34
10/17 54/35/45/-6/T/482/73                  30 WNW RMY 33
10/18 45/28/37/-14/0.00/480/73              24 NNW RMY 25
10/19 47/26/37/-13/0.00/648/99              25 SSW RMY 30
10/20 65/43/54/+4/0.00/…/..               28 SW  RMY 28
10/21 59/51/55/+5/0.01/…/..               18 SSE RMY 21
10/22 71/51/61/+12/T/…/..                 31 W   RMY 34
10/23 55/34/45/-4/0.00/…/..               31 NNW RMY 34
10/24 46/33/40/-9/0.00/…/..               15 SSE RMY N/A

10/25 low since midnight is 45F; normal low is now 40F

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 25
HIGH 81F IN 1963
LOW 26F IN 1922,1939
PRECIP 2.45 INCHES IN 2005
SNOWFALL 1.2 INCHES IN 1960
PEAK GUST 72 MPH ESE IN 1980

RECORDS FOR OCTOBER 26
HIGH 80F IN 1963
LOW 24F IN 1933
PRECIP 1.72 INCHES IN 1894
SNOW 3.0 INCHES IN 1962
WIND 59 MPH SSE IN 1967

TODAY’S REPORT PREPARED BY: Robert Skilling