Saturday, January 11, 2020

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, JANUARY 11, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

RECORD BREAKING WARMTH ATOP GREAT BLUE HILL…

The main story here today is the wind and temperatures.
A busy southwest wind is advecting unseasonably mild air
into the region. The high so far today is 64F which easily
breaks the old record of 59 degrees set back in 1975!
It appears the warmth may not be short lived and we
could be looking at another record high tomorrow which
currently stands at 60F from 2018! The max gust so far
is 47 MPH out of the SSW.

Visibility has been limited due to distant fog. Several splashes
of sun have been found though throughout the day amidst a chaotic sky.

The high temperature so far today is 64F, which is 30 degrees above
the daily normal maximum of 34F. The low since midnight
is 46F, which is 29 degrees above the normal low of 17F.

PRELIMINARY STATS FOR NOVEMBER 2019

TEMPERATURE, Deg. F
Avg. Max. 39.1 [0.0] Avg. Min. 25.0 [+1.4] Mean      32.1 [+0.8] 24-hour corrected mean: 32.3
Max. for month: 58F on the 10th
Min. for month: 9F on the 19th

HEATING DEGREE DAYS
Total heating units:   1014 [-29] Total for the season:  2251 [-54] Total for last season: 2295

PRECIPITATION, Inches
Total: 7.81 [+2.92] Greatest in 24 hrs: N/A

SNOWFALL, Inches
Total: 19.9 [+6.5] Greatest in 24 hrs: 5.8 ins. on the 1st-2nd

WIND, mph
Avg. uncorrected wind speed: 13.2 mph
Avg. corrected wind speed:   13.6 mph
Prevailing wind direction:   W [20%] Peak gust and direction:     53 S,W on the 9th, 15th

SUNSHINE:
Campbell-Stokes card minutes: 6168 minutes of possible 16470 or 37%
Astronomical total minutes: 6368 minutes of possible 17000 or 37%

Today’s Observations:

7 A.M.
Weather: Overcast Altocumulus & Altostratus; breaks in overcast
SW through W
Temperature: 52F; Dew Point: 48F; Wind: SSW at 17G25 kts.
Sea-level pressure: 30.29 ins. Hg, falling then falling more rapidly
Visibility: 35 miles, distant fog
6-hr Max temp: 52F
6-hr Min temp: 46F
24-hr Precip:  Trace
24-hr Snowfall: 0.0 ins.
BHO SA 1155 E65 OVC 35 259/52/48/2017G25/029/
FEW BINOVC SE-W DSNT FG ALQDS/ 8/09/ 58013 10052 20046

10 A.M.
Weather: Scattered Stratus; Broken Altocumulus & Altostratus; Thin Broken
Cirrus
Temperature: 56F; Dew Point: 51F; Wind: SSW at 18G25 kts,
Peak wind: 32 MPH (28 kts) SSW at 8:19 A.M.
Sea-level pressure: 30.25 ins. Hg, falling then falling more slowly
Visibility: 45 miles, distant fog
3-hr Precip:  0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 25 SCT E70 BKN E250 -BKN 45 244/56/51/2018G25/025/
DSNT FG ALQDS PK WND 2028/1319/ 8/694 56015

1 P.M.
Weather: Scattered Cumulus; few altocumulus
Temperature: 64F; Dew Point: 51F; Wind: SSW at 24G41 kts,
Peak wind: 47 MPH (41 kts) SSW at 12:37 P.M.
Sea-level pressure: 30.11 ins. Hg, falling then falling more slowly
Visibility: 45 miles, distant fog
6-hr Max temp: 64F
6-hr Min temp: 52F
6-hr Precip:  0.00 ins.
6-hr Snowfall: 0.0 ins.
BHO SA 1755 27 SCT 45 197/64/51/2024G41/011/ FEW AC ALQDS
DSNT FG ALQDS PK WND 2141/37/ 8/160 56047 10064 20052

SUMMARY FOR FRIDAY, JANUARY 10, 2020

TEMPERATURE (DEGREES F)
MAX…..48   NORMAL…..34
MIN…..23   NORMAL…..17
MEAN….36   NORMAL…..25

DEPARTURE FROM 30-YEAR NORMAL…………………+11
TOTAL DEPARTURE FOR THE MONTH…………………+76 [+7.4 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………29  DEPARTURE……. +11
TOTAL HEATING UNITS FOR THE MONTH…………..313  DEPARTURE…….-76
TOTAL HEATING UNITS FOR THE SEASON…………2564  DEPARTURE……-129
TOTAL HEATING UNITS LAST SEASON TO DATE…….2618  DEPARTURE…….-54

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..37 SW AT 1:30 P.M.
                   AERO…………………….37 SW AT 1:29 P.M.
                   ASOS…………………….39 SW AT 1:30 P.M.
                   DAVIS……………………39 SW AT 1:28 P.M. RMY 39
FASTEST MILE FOR YESTERDAY………………….29 SW AT 10:23 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….29 SW AT 10:22 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………28 SW AT 10:21 A.M.
AVERAGE WIND SPEED AND DIRECTION…………..18.9 SW
                   ASOS…………………..18.5
                   DAVIS………………….18.0 SW [215 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE……-0.14
                         ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….0.35  DEPARTURE……-1.07
                         ASOS…………..0.86
TOTAL PRECIPITATION FOR THE YEAR………..0.35  DEPARTURE……-1.07
                         ASOS…………..0.86

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0  DEPARTURE…….-0.5
TOTAL SNOWFALL FOR THE MONTH…………….1.2  DEPARTURE…….-4.4
TOTAL SNOWFALL FOR THE SEASON…………..21.2  DEPARTURE…….-0.4

PRELIMINARY CLIMATE SUMMARY FOR DECEMBER 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

12/01  32/16/24/-13/…./5.8/011/02           33 ENE AERO 32 ENE RMY N/A
12/02  37/25/31/-5/…./2.7/000/00            52 NE  AERO 47 NE  RMY 53
12/03  30/23/27/-9/…./4.6/000/00            32 N   AERO 35 N   RMY 36
12/04  34/22/28/-7/…./0.0/000/00            23 WNW AERO 23 NNW RMY N/A
12/05  41/26/34/-1/…./0.0/343/62            33 NW  AERO 35 NW  RMY 37
12/06  33/23/28/-7/0.02/0.1/000/00            25 NW  AERO 23 NW  RMY 29
12/07  31/18/25/-9/0.00/0.0/519/94            25 NW  AERO 23 NW  RMY N/A
12/08  36/15/26/-8/0.00/0.0/402/73            31 SSW AERO 32 SSW RMY N/A
12/09  57/36/47/+13/…./0.0/000/00           53 S   AERO 52 S   RMY 54
12/10  58/37/48/+15/…./0.0/044/08           35 SW  AERO 39 SW  RMY N/A
12/11  36/23/30/-3/…./3.0/236/43            25 NW  AERO 25 NW  RMY N/A
12/12  29/17/23/-10/…./1.8/488/89           29 W   AERO 30 W   RMY 25
12/13  46/22/34/+2/…./0.0/000/00            25 SSE AERO 25 SSE RMY N/A
12/14  58/46/52/+20/…./0.0/000/00           45 S   AERO 41 S   RMY N/A
12/15  48/28/38/+6/0.00/0.0/284/52            53 W   AERO 53 W   RMY 50
12/16  30/25/28/-3/0.00/0.0/000/00            36 W   AERO 36 W   RMY N/A
12/17  35/23/29/-2/…./1.0/000/00            22 NNW AERO 21 NE  RMY 23
12/18  33/18/26/-5/…/0.0/229/42             44 WNW AERO 45 WNW RMY N/A
12/19  20/9/15/-15/…/0.0/534/98             51 W   AERO 47 W   RMY N/A
12/20  29/11/20/-10/0.00/0.0/540/99           32 W   AERO 30 W   RMY 29
12/21  31/16/24/-6/0.00/0.0/163/30            16 SSE AERO 15 SSE RMY N/A
12/22  40/26/33/+4/0.00/0.0/212/39            23 SW  AERO 21 SW  RMY 23
12/23  54/33/44/+15/0.00/0.0/540/99           30 WSW AERO 30 SW  RMY 30
12/24  42/29/36/+7/0.00/0.0/507/93            30 NW  AERO 27 NW  RMY 30
12/25  42/25/34/+6/0.00/0.0/289/53            16 NNE AERO 16 N   RMY N/A
12/26  39/29/34/+6/0.00/0.0/174/32            22 ENE AERO 20 ENE RMY 22
12/27  47/31/39/+11/0.00/0.0/000/00           32 SSW AERO 30 SSW RMY 34
12/28  47/30/39/+11/0.00/0.0/470/86           23 W   AERO 22 W   RMY N/A
12/29  42/28/35/+8/…./0.0/383/70            22 WNW AERO 21 WNW RMY 23
12/30  36/32/34/+7/…./0.8/000/00            40 E   AERO 37 E   RMY 37
12/31  40/32/36/+9/…./0.0/000/00            35 E   AERO 32 E   RMY N/A    

DAILY RECORDS FOR DECEMBER

12/01/19: DAILY RECORD SNOWFALL OF 5.8 INS.,
          BREAKS PREVIOUS RECORD OF 2.0 INS. SET IN 1902.

PRELIMINARY CLIMATE SUMMARY FOR JANUARY 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

01/01  38/30/34/+7/…./0.0/…./..           39 W   AERO 38 W   RMY 41
01/02  46/29/38/+11/0.00/0.0/…./..          28 SW  AERO 28 SW  RMY 30
01/03  46/40/43/+17/0.00/0.0/…./..          21 SW  AERO 18 SW  RMY N/A
01/04  46/36/41/+15/…./0.0/…./..          16 NNW AERO 16 NNW RMY N/A
01/05  36/24/30/+4/…./0.5/…./..           43 NW  AERO 46 NW  RMY 43
01/06  33/23/28/+2/T/T/…./..                26 W   AERO 21 W   RMY N/A
01/07  38/29/34/+8/…./0.4/…/..            30 WSW AERO 28 WSW RMY N/A
01/08  39/22/31/+5/…./0.4/…/..            50 W   AERO 46 WNW RMY 47
01/09  28/16/22/-4/…./0.0/…/..            43 WNW AERO 40 WNW RMY N/A
01/10  48/23/36/11/T/0.0/…/..               37 SW  AERO 37 SW  RMY 39

10/11 The low since midnight is 46F, daily normal minimum is 17F

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

RECORDS FOR JANUARY 11
HIGH 59F IN 1975
LOW -7F IN 1968
PRECIP 1.58 INS. IN 2008
SNOW 10.2 INS. 1927
PEAK GUST 95e MPH S IN 1980

RECORDS FOR JANUARY 12
HIGH 60F IN 2018
LOW -15F IN 1886
PRECIP 2.04 INS. IN 2011
SNOW 18.2 INS. IN 2011
WIND 84e MPH S IN 1980

TODAY’S REPORT PREPARED BY: Andrew Swanson