Sunday, February 19, 2017

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, FEBRUARY 19, 2017
ALL TIMES ARE IN EASTERN STANDARD TIME

ABOVE AVERAGE TEMPERATURES CONTINUE UNDER CLOUDY SKIES

This morning, the temperature was 44F at the 7:00 A.M. EST observation
under cloudy skies with light winds.  The air was more humid than
yesterday with the relative humidity at 7:00 A.M. being 65%. There was
broken altocumulus in the sky early on along with broken cirrus and
distant haze along the horizon. In the early afternoon, there was
scattered altocumulus and a few cumulus on the horizon to the north.
Temperatures had climbed into the mid 50’s but remained well short of
today’s record, which is 66 set back in 1981.

Today’s Observations:

7 A.M.
Weather: Broken altocumulus, broken cirrus
Temperature: 44F; Dew Point: 33F; Wind: WSW at 11 kts
Sea-level pressure: 29.67 ins. Hg, rising, then slower
Visibility: 55 miles, distant haze in all directions
6-hr Max temp: 48F
6-hr Min temp: 44F
24-hr precip: 0.00 ins.
24-hr snowfall: 0.00 ins.
BHO SA 1155 E15 BKN 25 BKN 55 048/44/33/2411/967/ LGT DSNT HZ
ALQDS/ 8/071 51023 10048 20044

10 A.M.
Weather: Scattered altocumulus, few altostratus in all directions
Temperature: 38F; Dew Point: 17F; Wind: SSW at 12G18 kts
Sea-level pressure: 29.79 ins. Hg, steady then increasing
Visibility: 70 miles
BHO SA 1455 E15 BKN 25 BKN 55 061/51/33/2509G18/971/ LGT DSNT HZ ALQDS
8/071/ 53013

1 P.M.
Weather: Scattered Altocumulus, few cumulus north
Temperature: 54F; Dew Point: 32F; Wind: WSW at 15 kts,
Sea-level pressure: 29.68 ins. Hg, falling, then more quickly
Visibility: 75 miles, distant haze
BHO SA 1755 16 SCT 75 051/54/32/2515/968/ FEW CU N/ 8/07/ 58010 10054
20044

SUMMARY FOR SATURDAY, FEBRUARY 18, 2017

TEMPERATURE (DEGREES F)
MAX…..50   NORMAL…..37
MIN…..24   NORMAL…..20
MEAN….37   NORMAL…..29

DEPARTURE FROM 30-YEAR NORMAL…………………….+8
TOTAL DEPARTURE FOR THE MONTH……………………+26 [+1.2 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..28   DEPARTURE……….-9
TOTAL HEATING UNITS FOR THE MONTH………….657   DEPARTURE………-27
TOTAL HEATING UNITS FOR THE SEASON………..3684   DEPARTURE……..-531
TOTAL HEATING UNITS LAST SEASON TO DATE……3406   DIFFERENCE…….+278

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….31 SSW AT  1:43 P.M.*
AERO……………………29 SSW AT  1:42 P.M.
ASOS……………………33 SSW AT  1:41 P.M.
DAVIS…………………..35 SW  AT  9:30 A.M. RMY 35
FASTEST MILE FOR YESTERDAY…………………26 SSW AT  1:07 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………26 SSW AT  1:07 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..27 WSW AT  1:07 P.M.
AVERAGE WIND SPEED AND DIRECTION………….16.6 SSW
ASOS………………….16.4
DAVIS…………………15.5 WSW [248 deg.] *LAST OF SEVERAL OCCURRENCES

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE……-0.15
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….3.63  DEPARTURE……+1.12
ASOS…………….NA
TOTAL PRECIPITATION FOR THE YEAR………..9.13  DEPARTURE……+2.27
ASOS…………….NA

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0  DEPARTURE…….-0.5
TOTAL SNOWFALL FOR THE MONTH……………31.5  DEPARTURE……+22.6
TOTAL SNOWFALL FOR THE SEASON…………..52.3  DEPARTURE……+10.3

PRELIMINARY CLIMATE SUMMARY FOR FEBRUARY 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

2/1   40/25/33/+7/0.03/0.4/…/..           43 W   AERO 44 W   RMY 47
2/2   38/25/32/+6/T/T/…/..                36 WNW AERO 37 WNW RMY 36
2/3   30/19/25/-1/0.00/0.0/…/..           28 WNW AERO 29 WNW RMY 31
2/4   31/15/23/-3/0.00/0.0/…/..           31 WNW AERO 30 WNW RMY N/A
2/5   43/22/33/+7/0.00/0.0/…/..           38 SSW AERO 41 SSW RMY N/A
2/6   37/28/33/+7/0.00/0.0/…/..           41 WNW AERO 41 WNW RMY 43
2/7   37/30/34/+7/0.54/0.7/…/..           32 ENE AERO 31 ENE RMY 32
2/8   49/25/37/+10/T/0.0/…/..             25 W   AERO 25 W   RMY 31
2/9   35/8/22/-5/1.60/16.9/…/..           54 NNE AERO 53 NNE RMY 54
2/10  24/7/16/-11/T/T/…/..                43 WNW AERO 50 WNW RMY 48
2/11  27/15/21/-6/0.14/2.9/…/..           21 SE  AERO 20 SE  RMY 19
2/12  32/17/25/-2/0.71/5.6/…/..           22 ENE AERO 28 ENE RMY N/A
2/13  32/20/26/-2/0.27/2.2/…/..           48 NW  AERO 60 NW  RMY 61
2/14  35/16/26/-2/0.00/0.0/…/..           23 NW  AERO 24 NW  RMY 24
2/15  40/25/33/+5/…./…/…/..           31 SE  AERO 33 NW  RMY N/A
2/16  33/23/28/0/…./…/…/..            38 WNW AERO 38 WNW RMY 40
2/17  38/19/29/+1/…./…/…/..           36 WNW AER0 35 WNW RMY 35
2/18  50/24/37/+8/0.00/0.0/…/..           31 SSW AERO 29 SSW RMY 34

2/19  Low temp since midnight is 44F; normal low is now 20F

DAILY RECORDS FOR FEBRUARY 2017

2/09/17: NEW DAILY RECORD MAXIMUM SNOWFALL OF 16.9 INS.
PREVIOUS RECORD WAS 14.0 INS. SET IN 2015

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

RECORDS FOR FEBRUARY 19
HIGH 66F IN 1981
LOW -5F IN 1923
PRECIP 2.73 INCHES IN 1972
SNOWFALL 12.0 INCHES IN 1893
PEAK GUST 76 MPH ENE IN 1972

RECORDS FOR FEBRUARY 20
HIGH 66F IN 1930
LOW -4F IN 1966
PRECIP 1.90 INCHES IN 1934
SNOWFALL 15.0 INCHES IN 1921,1934
PEAK GUST 78 MPH NW IN 1972

TODAY’S REPORT PREPARED BY: Robert Millette