Monday, November 2, 2015

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

DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, NOVEMBER 2, 2015
ALL TIMES ARE IN EASTERN STANDARD TIME

FRONTAL PASSAGE THIS MORNING REVEALS BLUE BIRD MONDAY

A cold front moved through during this morning’s 7:00 AM EST
observation, with a distinct line of clearing along the
front. Visibility improved significantly from 60 to 80 miles
in all directions under clear conditions aided by cool, dry
Canadian air.

By the 1:00 PM EST observation only high cirrus were visible
in mostly the southern half of the sky. Prevailing visibility
was 75 miles, with a sector visibility of 60 miles from ESE-WSW.
A maximum temperature of 62F had been recorded by this time.
PRELIMINARY STATS FOR OCTOBER 2015

TEMPERATURE, Deg. F
Avg. Max. 59.9 [-0.4] Avg. Min. 43.1 [+0.2] Mean      51.5 [-0.1] Corrected mean: 51.1
Max. for month: 76 on 12th
Min. for month: 26 on 19th

COOLING DEGREE DAYS
Total cooling units: 0 [-5] Total for the season: 810 [+208] Total for last season: 595

HEATING DEGREE DAYS
Total heating units: 411 [-10] Total for the season: 454 [-109] Total for last season: 422

PRECIPITATION, Inches
Total: 2.69 [-2.00] Greatest in 24 hrs: 1.58 from 28th-29th

WIND, mph
Avg. uncorrected wind speed: 12.6
Avg. corrected wind speed: 12.9
Prevailing wind direction: NNW @ 13%
Peak gust and direction: 53 SSE on the 28th, S on the 29th

SUNSHINE:
Campbell-Stokes card minutes: n/a
Astronomical total minutes:   n/a

Today’s Observations:

7 A.M.
Weather: Scattered altostratus, broken cirrostratus,
few cumulus distant WNW-NE
Temperature: 50F; Dew Point: 40F; Wind: WNW at 16 kts,
Sea-level pressure: 30.01 ins. Hg, rising, then more slowly
Visibility: 80 miles, except 60 miles E-WSW
6-hr Max temp: 51F
6-hr Min temp: 47F
24-hr precip: Trace
BHO SA 1155 200 SCT E250 BKN 80 164/50/40/2916/001/
VSBY E-WSW 60 MI FEW CU DSNT WNW-NE/ 8/128 51015 10051 20047

10 A.M.
Weather: Scattered cirrostratus/cirrus, few altostratus
distant SE-SW, few cumulus distant NNW-NNE
Temperature: 57F; Dew Point 42F; Wind: estimated W at 5 kts
Wind Speed: Light
Sea-level pressure: 30.03 ins. Hg, rising, then falling but higher still
Visibility: 75 miles, except 60 miles ESE-SW
BHO SA 1455 250 SCT 75 171/57/42/E2705/003/ VSBY ESE-SW 60 MI
FEW AS DSNT SE-SW FEW CU DSNT NNW-NNE WND LGT/ 8/118 50007

1 P.M.
Weather: Broken cirrostratus, few cirrocumulus in
all directions
Temperature: 61F; Dew Point 40F; Wind: W at 7 kts
Sea-level pressure: 30.03 ins. Hg, falling then more quickly
Visibility: 75 miles, except 60 miles ESE-WSW
6-hr max. temp. 62F
6-hr min. temp. 49F
BHO SA 1755 E250 BKN 75 168/61/40/2607/003/ VSBY ESE-WSW 60 MI
FEW CC ALQDS/ 8/008 58003 10062 20049
SUMMARY FOR SUNDAY, NOVEMBER 1, 2015

TEMPERATURE (DEGREES F)
MAX…..59   NORMAL…..55
MIN…..45   NORMAL…..38
MEAN….52   NORMAL…..46

DEPARTURE FROM 30-YEAR NORMAL………………….+6
TOTAL DEPARTURE FOR THE MONTH………………….+6  [+5.8 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..13   DEPARTURE……….-6
TOTAL HEATING UNITS FOR THE MONTH…………..13   DEPARTURE……….-6
TOTAL HEATING UNITS FOR THE SEASON…………467   DEPARTURE……..-115
TOTAL HEATING UNITS LAST SEASON TO DATE…….446   DIFFERENCE……..+21

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….30  SSW AT  1:26 P.M.
ASOS……………………32  SSW AT  1:27 P.M.
DAVIS…………………..31  SW  AT  1:39 P.M. RMY 31
FASTEST MILE FOR YESTERDAY…………………24  SW  AT 12:35 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………24  SSW AT 12:25 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..23  SW  AT 12:25 P.M.
AVERAGE WIND SPEED AND DIRECTION……………14.5 SW
ASOS……………………14.4
DAVIS…………………. 13.3 SW [221 Deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….TRACE  DEPARTURE…..-0.16
ASOS……………0.00
TOTAL PRECIPITATION FOR THE MONTH……….TRACE  DEPARTURE…..-0.16
ASOS……………0.00
TOTAL PRECIPITATION FOR THE YEAR………..36.83  DEPARTURE…..-7.10
ASOS…………….N/A ***
*** ASOS annual total not available due to erroneous readings

PRELIMINARY CLIMATE SUMMARY FOR OCTOBER & NOVEMBER 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/-4/0.03/000/00               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/+4/0.00/306/47               28 SW  RMY 28
10/21 59/51/55/+5/0.01/039/06               18 SSE RMY 21
10/22 71/51/61/+12/T/149/23                 31 W   RMY 34
10/23 55/34/45/-4/0.00/541/84               31 NNW RMY 34
10/24 46/33/40/-9/0.00/000/00               15 SSE RMY N/A
10/25 59/44/52/+3/0.04/019/03               29 N   RMY 31
10/26 53/38/46/-2/0.00/636/100              23 NNW RMY 20
10/27 56/35/46/-2/0.00/531/81               15 SE  RMY N/A
10/28 64/44/54/+6/…./019/03               53 SSE RMY N/A
10/29 72/52/62/+15/…./257/41             53 S   RMY N/A
10/30 59/38/49/+2/0.00/…/..               33 WNW RMY 35
10/31 54/32/43/-4/0.00/…/..               18 SSW RMY N/A

11/1  59/45/52/+6/T/…/..                  30 SSW RMY 31

11/2 low since midnight is 47F; normal low is now 37F

DAILY RECORDS FOR OCTOBER AND NOVEMBER 2015

-NONE

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

RECORDS FOR NOVEMBER 2
HIGH 81 IN 1950
LOW 22 IN 1965
PRECIP 1.67 INCHES IN 1970
SNOWFALL 1.8 IN 2014
PEAK GUST 63 WSW IN 1973

RECORDS FOR NOVEMBER 3
HIGH 75 IN 1990
LOW 21 IN 1891
PRECIP 1.92 INCHES IN 1951
SNOWFALL 0.1 IN 1951
PEAK GUST 96e SSE IN 1951

TODAY’S REPORT PREPARED BY: Brian Fitzgerald