Friday, November 5, 2021

| November 5, 2021 | Reply

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

FRIDAY, NOVEMBER 5, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0623E
SUNSET:  1632E

A FRIDAY STUNNER ATOP GREAT BLUE HILL….

Plentiful sunshine and gentle winds are dominating the summit today!
The gorgeous weather is accompanied by near perfect visibility
of 85 miles straight through all observation periods. Mt. Monadnock
in southwestern NH is in excellent view.

This morning’s low of 32F marked the 2nd consecutive day at or below
the freezing mark. The last 2-day period of such metric occured
on April 22nd & 23rd this spring. Allowing for good radiational cooling
is the low dew points, which have been oscillating in the mid-20s and
low-30s throughout the past 48 hours.

The high so far today is 49F, 5 degrees below the normal max of
54F. The low since midnight is 32F, 5 degrees below the normal low
of 37F.   


PRELIMINARY STATS FOR OCTOBER 2021

TEMPERATURE, Deg. F
Avg. Max. 64.1 [+3.1]
Avg. Min. 49.4 [+5.4]
Mean      56.9 [+4.3]
24-hour corrected mean: 56.3
Max. for month: 75F on the 13th
Min. for month: 37F on the 24th

HEATING DEGREE DAYS
Total heating units:    253 [-67]
Total for the season:   327 [-185]
Total for last season:  452

COOLING DEGREE DAYS
Total cooling units:      3  [-4]
Total for the season:    717 [-114]
Total for last season:   831

PRECIPITATION, Inches
Total: 7.87 [+2.38]
Greatest in 24 hrs: N/A

WIND, mph
Avg. uncorrected wind speed: 10.9 mph
Avg. corrected wind speed:   11.4 mph
Prevailing wind direction:   WNW [10%]
Peak gust and direction:     66 NNE on the 27th

SUNSHINE:
Campbell-Stokes card minutes: 10494 minutes of a possible 19824 or 53%
Astronomical total minutes: 10865 minutes of a possible 20522 or 53%


Today’s Observations:

7 A.M.
Weather: Clear (few cumulus & few altocumulus/altostratus ENE-SSE,
think smoke layer along horizon, scattered light frost on grassy
surfaces)
Temperature: 34F; Dew Point: 30F; Relative Humidity: 87%
Wind: NNE @ 11G16 kts
Sea-level pressure: 1026.4 mb; 30.31 in. Hg: rising unsteadily
Visibility: 85 miles
6-hr Max temp: 37F
6-hr Min temp: 32F
24-hr Precip: 0.00 ins.
BHO SA 1155 CLR 85 264/34/30/0211G16/031/ FEW CU DSNT ENE-SSE
FEW AC/AS DSNT ENE-SSE THN K LYR ALG HRZN ALQDS SCT LGT FROST
GRASSY SFCS/ 8/150 52014 10037 20032

10 A.M.
Weather: Clear (few cumulus E-SSE)
Temperature: 44F; Dew Point: 28F; Relative Humidity: 52%
Wind: NE @ 6G11 kts (wind light)
Sea-level pressure: 1027.6 mb; 30.34 in Hg; rising, then rising more slowly
Visibility: 85 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 CLR 85 276/44/28/0406G11/034/ FEW CU DSNT E-SSE WND LGT/ 8/100 51012

1 P.M.
Weather: Clear (few cumulus all quads)
Temperature: 48F, Dew point: 26F; Relative Humidity: 42%
Wind: NNW @ 7G14 kts
Sea-level pressure: 1026.3 mb; 30.31 in Hg; falling, then falling more rapidly
Visibility: 85 miles 
6-hr Max temp: 49F
6-hr Min temp: 34F
6-hr Precip: 0.00 ins.
BHO SA 1755 CLR 85 263/48/26/3507G14/031/ FEW CU DSNT ALQDS/ 8/100 58013
10049 20034

SUMMARY FOR THURSDAY, NOVEMBER 4, 2021

TEMPERATURE (DEGREES F)
MAX…….49     NORMAL…..54
MIN…….31     NORMAL…..37
MEAN……40     NORMAL…..46

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………… -6
TOTAL DEPARTURE FOR THE MONTH……………………… -5 [-1.5 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022)
TOTAL HEATING UNITS FOR YESTERDAY……………25  DEPARTURE……..+6
TOTAL HEATING UNITS FOR THE MONTH………….. 79  DEPARTURE……..+4
TOTAL HEATING UNITS FOR THE SEASON………….406  DEPARTURE……-181
TOTAL HEATING UNITS LAST SEASON TO DATE……..555  DEPARTURE……-149

PEAK WIND GUST (MPH):
                     Official (1-SEC AVG)…….17 NNE @  7:11 A.M.
                     AEROVANE……………….17 NNW @ 12:05 A.M.
                     VECTOR #2 (Instantaneous)..18     @ 12:03 A.M.
                     DAVIS #2 ………………15 N   @ 12:04 A.M.
                     RMY #2 (Instantaneous)…..16 NNE @  7:11 A.M.
                     ASOS………..OUT OF SERVICE D/T RENOVATIONS
                     VECTOR #1……OUT OF SERVICE D/T RENOVATIONS
                     DAVIS #1…….OUT OF SERVICE D/T RENOVATIONS
                     RMY #1………OUT OF SERVICE D/T RENOVATIONS  
                     MERLIN………OUT OF SERVICE D/T RENOVATIONS

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………13 NNE @  7:12 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..14     @  7:09 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………13 NNE @  7:09 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..13 NNE @  7:09 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE…….OUT OF SERVICE D/T RENOVATIONS
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE…OUT OF SERVICE D/T RENOVATIONS
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE..OUT OF SERVICE D/T RENOVATIONS
MAXIMUM 2-MINUTE RMY #1 AVERAGE…..OUT OF SERVICE D/T RENOVATIONS

AVERAGE WIND SPEED AND DIRECTION:
                     CONTACTING/OFFICIAL……. 7.2 NNW  [172 total miles]
                     VECTOR #2…………….. 8.0 
                     DAVIS #2……………… 7.7 NE
                     RMY #2……………….. 8.0 NE
                     RMY #1…………..OUT OF SERVICE D/T RENOVATIONS
                     ASOS…………….OUT OF SERVICE D/T RENOVATIONS
                     VECTOR #1………..OUT OF SERVICE D/T RENOVATIONS
                     DAVIS #1…………OUT OF SERVICE D/T RENOVATIONS    

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…….0.00  DEPARTURE….-0.15
TOTAL PRECIPITATION FOR THE MONTH………….0.00  DEPARTURE….-0.60
TOTAL PRECIPITATION FOR THE YEAR………….54.85  DEPARTURE…+10.35

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M………….0.0  DEPARTURE…….0.0
TOTAL SNOWFALL FOR THE MONTH……………….0.0  DEPARTURE……-0.1
TOTAL SNOWFALL FOR THE SEASON (2021-2022)……0.0  DEPARTURE……-0.8

PRELIMINARY CLIMATE SUMMARY FOR OCTOBER CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/PEAK GUST/AERO/RMY GUST
AERO: Aerovane wind recording system 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
M:    Missing data

10/01   64/44/54/-4/0.00/583/83          20 WNW AERO 20 WNW RMY N/A
10/02   73/47/60/+2/0.00/567/81          24 WSW AERO 23 WSW RMY N/A 
10/03   65/55/60/+3/0.09/070/10          19 E   AERO 19 E   RMY N/A
10/04   59/51/55/-2/1.69/000/00          30 E   AERO 30 E   RMY N/A
10/05   58/50/54/-3/0.30/000/00          22 NNE AERO 23 NE  RMY N/A
10/06   69/50/60/+4/0.00/407/59          15 N   AERO 16 N   RMY N/A
10/07   73/55/64/+8/0.00/550/80          15 WSW AERO 15 W   RMY N/A
10/08   69/55/62/+7/T/616/90             24 ENE AERO 23 ENE RMY N/A 
10/09   62/54/58/+3/0.01/273/40          23 E   AERO 23 E   RMY N/A
10/10   62/54/58/+3/T/000/00             22 E   AERO 21 E   RMY N/A
10/11   67/56/62/+8/0.01/371/55          20 NE  AERO 21 NE  RMY N/A
10/12   72/54/63/+9/0.00/612/91          15 SW  AERO 15 SW  RMY N/A
10/13   75/55/65/+11/0.00/630/94         18 SW  AERO 18 SW  RMY N/A 
10/14   73/56/65/+12/0.00/614/92         19 N   AERO 20 N   RMY N/A
10/15   74/55/67/+14/0.00/452/68         24 S   AERO 24 SSW RMY N/A 
10/16   73/59/66/+14/0.06/351/53         43 S   AERO 50 S   RMY 44
10/17   62/47/55/+3/0.25/580/88          32 WNW AERO 31 WNW RMY 31
10/18   60/42/51/-1/0.01/544/83          31 NW  AERO 32 NW  RMY 33
10/19   59/40/50/-1/0.00/653/100         35 WNW AERO 37 W   RMY 38
10/20   70/49/60/+9/0.00/560/86          23 W   AERO 23 W   RMY 23
10/21   74/56/65/+14/0.00/473/73         30 SSW AERO 32 S   RMY 32 
10/22   71/51/61/+11/0.00/535/83         27 S   AERO 30 S   RMY 29
10/23   60/44/52/+2/0.00/475/74          24 NW  AERO 22 NW  RMY 24
10/24   57/37/47/-3/0.01/589/92          25 NNW AERO 25 NNW RMY 25
10/25   56/47/52/+3/0.63/000/00          29 NE  AERO 30 NE  RMY 32
10/26   61/47/54/+5/2.23/000/00          49 NNE AERO 56 N   RMY 54
10/27   48/44/46/-3/0.87/000/00          66 NNE AERO 74 NNE RMY 65
10/28   48/39/44/-4/0.00/000/00          26 NNE AERO 26 NNE RMY 28
10/29   49/37/43/-5/0.00/000/00          25 ENE AERO 24 ENE RMY 24
10/30   59/49/54/+7/1.02/000/00          33 E   AERO 32 E   RMY 33
10/31   64/51/58/+11/0.69/360/58         33 WNW AERO 35 SW  RMY 35

RECORDS FOR THE MONTH:

    Peak Gust of 66 MPH NNE on the 27th, beating the old record of
    54 WNW, NE set in 1968 and 2018.

    Daily Precipitation of 2.23 inches on the 26th, beating the old 
    record of 1.57 inches in 1898. 

PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/PEAK GUST/AERO/RMY GUST
AERO: Aerovane wind recording system 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
M:    Missing data

11/01   59/41/50/+3/0.00/0.0/…/..      38 WNW AERO 39 WNW RMY 39
11/02   56/40/48/+1/0.00/0.0/…/..      25 SW  AERO 25 SW  RMY 26
11/03   51/35/43/-3/0.00/0.0/…/..      28 W   AERO 25 W   RMY 27     
11/04   49/31/40/-6/0.00/0.0/…/..      17 NNE AERO 17 NNW RMY 16

11/05   The low since midnight is 32F, the daily normal low is 37F

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

RECORDS FOR NOVEMBER 5
HIGH 76 IN 1994
LOW 18 IN 1908
PRECIP 4.26 INCHES IN 1955
SNOWFALL 2.0 IN 1894
PEAK GUST 69 W IN 2004

RECORDS FOR NOVEMBER 6
HIGH 72 IN 2020
LOW 22 IN 1951
PRECIP 1.72 INCHES IN 1907
SNOWFALL 6.0 IN 1894
PEAK GUST 63 W IN 1973

TODAY’S REPORT PREPARED BY: Andrew Swanson

Category: Daily Discussions

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