Thursday, November 28, 2019

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

DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, NOVEMBER 28, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

HAPPY THANKSGIVING FROM THE BLUE HILL OBSERVATORY…

A cold front passed through the region last night bringing
with it showers and even a rumble of thunder. This is the
second time this week that thunder has been recorded here at
Blue Hill, the first occurring on Sunday afternoon. Rainfall
totaled 0.30″ for the 24 hours ending at 7 A.M.

Today we find that the mild temperatures of the last few days
have now departed. Ushering in this cooler air, we have gusty
northwest winds. Gusts of 35-40mph have been common late this
morning into early this afternoon.

Occasional rain showers have also been occurring, mixing with
snow at times. Additional precipitation for the 6 hours ending
at 1 P.M. is 0.01″ with a trace of snow.

The high for today occurred back at midnight when it was 48F,
which is 3 degrees above the daily normal maximum of 45F. The
low so far today 38F, which is 8 degrees above the normal
minimum of 30F.

Today’s Observations:

7 A.M.
Weather: Overcast stratus, light rain
Temperature: 38F; Dew Point: 37F; Wind: WNW at 18, gusting to 27 kts
Peak Wind: 30 kts at 6:23 A.M.
Sea-level pressure: 29.52 ins. Hg, rising, then more rapidly
Visibility: 15 miles
6-hr Max temp: 45F
6-hr Min temp: 38F
24-hr Precip:  0.30 ins.
24-hr Snowfall: 0.0 ins.
BHO SA 1155 E25 OVC 15R- 995/38/37/3018G27/952/
PK WND 2930/23/ 8/7// 53015 6/// 70030 10045 20038

10 A.M.
Weather: Overcast stratocumulus
Temperature: 42F; Dew Point: 37F; Wind: NW at 17, gusting to 24 kts
Peak Wind: 26 kts at 9:29 A.M.
Sea-level pressure: 29.59ins. Hg, rising, then more rapidly
Visibility: 60 miles
3-hr Precip: 0.01 ins.
BHO SA 1455 E30 OVC 60 019/42/37/3217G24/959/ BINOVC DSNT SE-SW
PK WND 3126/29/ 8/5// 53024 6001

1 P.M.
Weather: Overcast stratocumulus, light rain shower
Temperature: 38F; Dew Point: 35F; Wind: NW at 16, gusting to 22 kts
Peak Wind: 34 kts at 12:02 P.M.
Sea-level pressure: 29.68 ins. Hg, rising, then more rapidly
Visibility: 70 miles, 20 miles N, 15 miles ESE-SSE
6-hr Max temp: 42F
6-hr Min temp: 38F
6-hr Precip: 0.01 ins.
BHO SA 1755 E30 OVC 70RW- 051/38/35/3316G22/968/ BINOVC DSNT SSW-W-NW
VSBY 20 N 15 ESE-SSE PK WND 3234/02/ PCPN VRY LGT SB11E16/ 8/5//
53032 6001 10042 20038

SUMMARY FOR WEDNESDAY, NOVEMBER 27, 2019

TEMPERATURE (DEGREES F)
MAX…..50   NORMAL…..46
MIN…..42   NORMAL…..30
MEAN….46   NORMAL…..38

DEPARTURE FROM 30-YEAR NORMAL……………….. +8
TOTAL DEPARTURE FOR THE MONTH………………..-89 [-3.5 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………19  DEPARTURE……..-8
TOTAL HEATING UNITS FOR THE MONTH…………..703  DEPARTURE…….+88
TOTAL HEATING UNITS FOR THE SEASON…………1143  DEPARTURE…….-35
TOTAL HEATING UNITS LAST SEASON TO DATE…….1229  DEPARTURE…….-86

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..30   W AT 11:44 P.M.
AERO…………………….32   W AT 11:44 P.M
ASOS…………………….30   W AT 11:45 P.M.
DAVIS……………………31   W AT 11:43 P.M. RMY N/A
FASTEST MILE FOR YESTERDAY………………….24   W AT 11:42 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….22   W AT 11:57 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………24   W AT 11:43 P.M.
AVERAGE WIND SPEED AND DIRECTION……………9.6   E
ASOS…………………..10.3
DAVIS………………….10.2  SE [140 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.30  DEPARTURE……+0.13
ASOS…………..0.31
TOTAL PRECIPITATION FOR THE MONTH……….3.73  DEPARTURE……-0.55
ASOS…………..3.90
TOTAL PRECIPITATION FOR THE YEAR……….49.07  DEPARTURE……+1.01
ASOS………….49.37

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0  DEPARTURE…….-0.2
TOTAL SNOWFALL FOR THE MONTH…………….0.1  DEPARTURE…….-1.7
TOTAL SNOWFALL FOR THE SEASON……………0.1  DEPARTURE…….-2.0

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  67/35/51/+5/…./0.0/534/86            67 S   AERO M  M   RMY N/A
11/02  50/31/41/-5/0.00/0.0/612/99            17 WNW AERO 14 W   RMY N/A
11/03  53/35/44/-2/0.00/0.0/567/92            25 WSW AERO 23 W   RMY 26
11/04  53/33/43/-2/0.00/0.0/546/89            24 S   AERO 20 S   RMY 24
11/05  54/44/49/+4/0.33/0.0/000/00            22 S   AERO 18 WNW RMY 28
11/06  51/36/44/-1/0.00/0.0/596/98            28 WSW AERO 23 W   RMY 27
11/07  55/38/47/+2/0.27/0.0/000/00            30 S   AERO 26 SSW RMY 32
11/08  38/23/31/-13/0.00/0.0/555/92           38 NW  AERO 37 WNW RMY 44
11/09  39/20/30/-14/0.00/0.0/583/97           22 S   AERO 18 S   RMY N/A
11/10  51/30/41/-3/0.00/0.0/174/29            30 SW  AERO 30 SW  RMY 31
11/11  52/39/46/+3/T/0.0/000/00               23 NE  AERO 22 NE  RMY 23
11/12  42/20/31/-12/0.08/0.1/000/00           37 WNW AERO 37 WNW RMY 41
11/13  28/15/22/-21/0.00/0.0/592/100          32 WNW AERO 32 WNW RMY 35
11/14  36/17/28/-14/0.00/0.0/136/23           18 SW  AERO 17 SW  RMY 20
11/15  51/32/42/0/0.00/0.0/553/94             25 WNW AERO 25 WNW RMY N/A
11/16  35/22/29/-13/0.00/0.0/580/99           35 NNW AERO 35 NNW RMY N/A
11/17  40/21/31/-10/T/T/…/..                28 ENE AERO 27 ENE RMY 29
11/18  36/32/34/-7/…./0.0/…/..            28 NNE AERO 29 N   RMY 31
11/19  42/36/39/-2/…./0.0/…/..            12 SSW AERO  9 NNW RMY N/A
11/20  38/33/36/-4/…./T/…/..              20 NW  AERO 18 NW  RMY 21
11/21  46/30/38/-2/0.00/0.0/…/..            21 NW  AERO 21 NW  RMY N/A
11/22  52/32/42/+2/0.12/0.0/…/..            46 W   AERO 47 W   RMY 47
11/23  44/27/36/-3/0.00/0.0/…/..            29 WNW AERO 29 WNW RMY N/A
11/24  44/35/40/+1/1.49/0.0/…/..            45 N   AERO 44 NE  RMY 46 TSTM
11/25  50/34/42/+3/0.00/0.0/…/..            32 WNW AERO 35 WNW RMY 23
11/26  59/39/49/+11/0.00/0.0/…/..           28 SSW AERO 27 SSW RMY 29
11/27  50/42/46/+8/…./0.0/…/..            30 W   AERO 32 W   RMY N/A TSTM

11/28 The low since midnight is 38F, daily normal minimum is 30F

DAILY RECORDS FOR NOVEMBER

11/13/19: DAILY RECORD LOW MAXIMUM TEMPERATURE OF 28F,
BREAKS PREVIOUS RECORD OF 30F SET IN 1920.
It was also the third earliest maximum temperature
colder than 30F on record, behind only 28F on 11/8/1894
and 29F on 11/12/1894.

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

RECORDS FOR NOVEMBER 28
HIGH 70 IN 1990
LOW 10 IN 1901,1930,1936
PRECIP 1.84 INCHES IN 1889
SNOWFALL 3.0 INS IN 1917
PEAK GUST 90 SSW IN 1958

RECORDS FOR NOVEMBER 29
HIGH 66 IN 2011
LOW 6 IN 1901
PRECIP 2.69 INCHES IN 1963
SNOWFALL 6.0 INS IN 2012
PEAK GUST 86 SSE IN 1963

TODAY’S REPORT PREPARED BY: Matt Douglas