Wednesday, November 18, 2015

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

DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, NOVEMBER 18, 2015
ALL TIMES ARE IN EASTERN STANDARD TIME

DRY, COOL CONDITIONS PREVAIL ONCE AGAIN AS CLOUDS SLOWLY
BUILD INTO THE REGION

Temperatures could only muster a maximum reading of 45F
yesterday, with a morning low of 28F. Overnight, temperatures
dipped to 35F, while nearby at Norwood Memorial Airport (KOWD)
temperatures dipped to 17F. Frost was reported on the ground
this morning, giving further evidence to an inversion near the
surface of the ground.

Skies have been mostly clear today, and by the 1:00 PM EST
observation only a thin sliver of cumulus distant to the SSE
through NW gave an indication of tonight’s increasing clouds.
Visibility was uniform in all directions at 65 miles with
light distant haze. A maximum temperature of 49F had been
recorded so far today.
Today’s Observations:

7 A.M.
Weather: Clear, few stratocumulus distant offshore NE-ESE,
few thin cirrus distant NE-SSE, inversion present in all directions
Temperature: 36F; Dew Point: 29F; Wind: SSW at 7 kts
Sea-level pressure: 30.60 ins. Hg, rising, then more quickly
Visibility: 70 miles, light distant haze
6-hr Max temp: 36F
6-hr Min temp: 35F
24-hr precip: none
BHO SA 1155 CLR 70 364/36/29/2107/060/ FEW SC DSNT OFFSHR NE-ESE
FEW THN CI DSNT NE-SSE INVSN PRSNT ALQDS THN FG BLO INVSN ALQDS
LGT DSNT HZ ALQDS/ 8/501 53013 10036 20035

10 A.M.
Weather: Clear, few stratocumulus distant offshore NE-S,
few cumulus distant SW-NW, few thin cirrus in all directions
Temperature: 45F; Dew Point 31F; Wind: estimated SSE at 6 kts,
Wind Speed: Light
Sea-level pressure: 30.60 ins. Hg, rising, then falling and lower
Visibility: 70 miles, except 40 miles SW-NW, hazy SW-NW
BHO SA 1455 CLR 70 363/45/31/E1606/060/ VSBY SW-NW 40 MI FEW SC
DSNT OFFSHR NE-S FEW CU DSNT SW-NW FEW THN CI ALQDS HAZY SW-NW
WND LGT/ 8/801 58001

1 P.M.
Weather: Clear, few stratocumulus distant offshore NE-ESE,
few cumulus distant SSE-NW, few thin cirrus in all directions
Temperature: 49F; Dew Point 26F; Wind: estimated S at 6 kts
Wind Speed: Light
Sea-level pressure: 30.56 ins. Hg, falling, then more quickly
Visibility: 65 miles, light distant haze
6-hr max. temp. 49F
6-hr min. temp. 36F
BHO SA 1755 CLR 65 350/49/26/E1906/056/ FEW SC DSNT OFFSHR NE-ESE
FEW CU DSNT SSE-NW FEW THN CI ALQDS LGT DSNT HZ ALQDS WND LGT/
8/801 58013 10049 20036
SUMMARY FOR TUESDAY, NOVEMBER 17, 2015

TEMPERATURE (DEGREES F)
MAX…..45   NORMAL…..50
MIN…..28   NORMAL…..33
MEAN….37   NORMAL…..41

DEPARTURE FROM 30-YEAR NORMAL………………….-4
TOTAL DEPARTURE FOR THE MONTH………………..+113  [+6.6 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..28   DEPARTURE……….+4
TOTAL HEATING UNITS FOR THE MONTH………….247   DEPARTURE……..-112
TOTAL HEATING UNITS FOR THE SEASON…………701   DEPARTURE……..-221
TOTAL HEATING UNITS LAST SEASON TO DATE…….792   DIFFERENCE……..-91

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….18 NNE AT  12:23 A.M.*
ASOS……………………23 N   AT  12:01 A.M.
DAVIS…………………..20 NNE AT  12:22 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY…………………14 NNE AT  12:20 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………14 NNE AT  12:32 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..13 NNE AT  12:22 A.M.
AVERAGE WIND SPEED AND DIRECTION……………7.5 NNE
ASOS……………………7.6
DAVIS…………………..6.7 NE [41 Deg.] * Last of several occurrences

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…..0.00  DEPARTURE…..-0.16
ASOS……………0.00
TOTAL PRECIPITATION FOR THE MONTH………..0.80  DEPARTURE…..-1.87
ASOS……………0.80
TOTAL PRECIPITATION FOR THE YEAR………..37.63  DEPARTURE…..-8.81
ASOS…………….N/A ***
*** ASOS annual total not available due to erroneous readings

PRELIMINARY CLIMATE SUMMARY FOR 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

11/1  59/45/52/+6/T/…/..                  30 SSW RMY 31
11/2  62/47/55/+9/0.00/…/..               24 W   RMY N/A
11/3  71/44/58/+12/0.00/…/..              25 W   RMY 25
11/4  66/49/58/+13/0.00/…/..              22 SSW RMY N/A
11/5  72/51/62/+17/0.00/…/..              31 SW  RMY 36
11/6  71/60/66/+21/0.00/…/..              35 SSW RMY 38
11/7  64/46/55/+10/0.00/…/..              33 WNW RMY 35
11/8  54/39/47/+3/0.00/…/..               26 NW  RMY 30
11/9  59/38/49/+5/0.00/…/..               20 W   RMY 21
11/10 53/45/49/+5/…./000/00               28 NE  RMY N/A
11/11 48/43/46/+3/…./000/00               41 NE  RMY N/A
11/12 55/42/49/+6/…./000/00               28 S   RMY 30
11/13 57/41/49/+6/…./…/..               40 WSW RMY 47
11/14 45/31/38/-4/0.00/…/..               40 NW  RMY 47
11/15 51/31/41/-1/0.00/…/..               25 W   RMY 27
11/16 59/36/48/+6/0.00/…/..               25 NNW RMY 29
11/17 45/28/37/-4/0.00/…/..               18 NNE RMY N/A

11/18 low since midnight is 35F; normal low is now 33F

DAILY RECORDS FOR NOVEMBER 2015

**11/6 DAILY RECORD MAXIMUM TEMPERATURE OF 71F
TIES PREVIOUS RECORD OF 71F SET IN 1959

**11/6 DAILY RECORD HIGH MINIMUM TEMPERATURE OF 60F
BREAKS PREVIOUS RECORD OF 58F SET IN 1938

**11/6 DAILY RECORD HIGH MINIMUM TEMPERATURE OF 60F
TIES PREVIOUS MONTHLY RECORD OF 60F SET ON
11/8/1996

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

RECORDS FOR NOVEMBER 18
HIGH 72 IN 1963
LOW 10 IN 1936
PRECIP 1.80 INS IN 1929
SNOWFALL 6.3 INS IN 1980
PEAK GUST 60 SW IN 1987

RECORDS FOR NOVEMBER 19
HIGH 72 IN 1941
LOW 10 IN 1936
PRECIP 1.92 INCHES IN 1926
SNOWFALL 11.0 INS IN 1986
PEAK GUST 59e E IN 1945

TODAY’S REPORT PREPARED BY: Brian Fitzgerald