Tuesday, November 18, 2014

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

DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, NOVEMBER 18, 2014
ALL TIMES ARE IN EASTERN STANDARD TIME

RAIN COMES TO AN END BEFORE MIDNIGHT, STORM TOTAL
OF 1.67 INCHES

Thick fog and two rounds of heavy rain came to an end
late last evening, bringing 1.67 inches of rain to Great
Blue Hill with locally higher amounts in the region.
Heavy rain fell between 9:00-10:00 AM EST and 4:00-5:00 PM
EST, with thunderstorms forming to our south during the
4:00-5:00 PM EST time frame.

Winds peaked out at just 29 MPH officially, along with
thick fog finally lifting from the summit during the
early morning hours. Yesterday’s daily record precipitation
of 1.92, set in 1920, was not broken.

Today’s Observations:

7 A.M.
Weather: Broken stratocumulus, few cumulus fractus
in all directions
Temperature: 35F; Dew Point: 32F; Wind: W at 9 kts
Sea-level pressure: 29.57 ins. Hg, rising, then more quickly
Visibility: 70 miles, except 40 miles WSW-W
6-hr max temp: 42F
6-hr min temp: 35F
24-hr precip: 1.31 inches
BHO SA 1155 E49 BKN 70 013/35/32/2709/957/ VSBY WSW-W 40 MI
FEW CUFRA ALQDS/ 8/500 53013 ASOS 70137 MANUAL 70131 10042 20035

10 A.M.
Weather: Scattered stratocumulus, few cumulus in all directions,
few stratocumulus lenticularis in all directions
Temperature: 35F; Dew Point: 23F; Wind: W at 17G24 kts
Sea-level pressure: 29.64 ins. Hg, rising, then more slowly
Visibility: 50 miles
BHO SA 1455 55 SCT 50 037/35/23/2717G24/964/ FEW CU ALQDS FEW
SCSL ALQDS/ 8/800 51024

1 P.M.
Weather: Scattered stratocumulus, scattered cirrus fibratus
Temperature: 35F; Dew Point: 17F; Wind: W at 17G26 kts
Peak Wind: 26 kts W at 12:55 PM EST
Sea-level pressure: 29.65 ins. Hg, rising, then more slowly
Visibility: 60 miles
6-hr max temp: 38F
6-hr min temp: 34F
6-hr precip: 0.00 inches
BHO SA 1755 50 SCT 280 SCT 60 040/35/17/2817G26/965/
PK WND 2826/55/ 8/401 51003 10038 20034

SUMMARY FOR MONDAY, NOVEMBER 17, 2014

TEMPERATURE (DEGREES F)
MAX…..52   NORMAL…..50
MIN…..34   NORMAL…..33
MEAN….43   NORMAL…..41

DEPARTURE FROM 30-YEAR NORMAL…………………….+2
TOTAL DEPARTURE FOR THE MONTH……………………-11 [-0.8 DEGREE/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..22  DEPARTURE………..-2
TOTAL HEATING UNITS FOR THE MONTH………….370  DEPARTURE……….+11
TOTAL HEATING UNITS FOR THE SEASON…………792  DEPARTURE………-130
TOTAL HEATING UNITS LAST SEASON TO DATE…….828  DIFFERENCE………-36

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………29 ENE AT 11:47 A.M.
ASOS…………………..33 E   AT 11:49 A.M.
DAVIS………………….30 ENE AT 11:46 A.M. RMY 31
FASTEST MILE FOR YESTERDAY………………..26 ENE AT 11:49 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..28 E   AT 11:47 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….25 ENE AT 11:47 A.M.
AVERAGE WIND SPEED AND DIRECTION…………10.6 ENE
ASOS…………………10.8
DAVIS…………………9.4 S (174 degrees)
* Last of several occurrences

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….1.31  DEPARTURE…..+1.15
ASOS…………..1.37
TOTAL PRECIPITATION FOR THE MONTH……….3.70  DEPARTURE…..+1.03
ASOS…………..3.73
TOTAL PRECIPITATION FOR THE YEAR……….45.25  DEPARTURE…..-1.19
ASOS………….45.60

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0  DEPARTURE……-0.1
TOTAL SNOWFALL FOR THE MONTH…………….5.3  DEPARTURE……+4.6
TOTAL SNOWFALL FOR THE SEASON……………5.3  DEPARTURE……+4.3

PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOWFALL/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  45/36/41/-5/0.79/0.0/000/00              35 NNE RMY N/A
11/2  37/32/35/-11/0.29/1.8/000/00             46 NW  RMY 49
11/3  50/30/45/-6/0.00/0.0/584/95              39 WNW RMY 43
11/4  61/44/53/+8/0.00/0.0/208/34              28 SSW RMY 32
11/5  66/50/58/+13/0.00/0.0/006/01             29 SSW RMY N/A
11/6  52/45/49/+4/0.58/0.0/000/00              23 NE  RMY 24
11/7  46/34/40/-5/0.00/0.0/079/13              39 NW  RMY 42
11/8  47/30/39/-5/0.00/0.0/555/92              24 W   RMY 25
11/9  56/38/47/+3/0.00/0.0/…/..              23 SSW RMY N/A
11/10 58/40/49/+5/0.00/0.0/…/..              17 S   RMY 20
11/11 61/43/52/+9/0.00/0.0/…/..              22 S   RMY 25
11/12 59/40/50/+7/0.00/0.0/…/..              22 W   RMY 25
11/13 49/32/41/-2/0.08/T/…/..                21 NW  RMY N/A
11/14 41/27/34/-8/0.00/0.0/…/..              23 NW  RMY 27
11/15 37/24/31/-11/0.00/0.0/…/..             23 NW  RMY 23
11/16 39/26/33/-9/0.00/0.0/…/..              17 S   RMY 19
11/17 52/34/43/+2/1.67/0.0/000/00              29 ENE RMY 31

11/18 morning low temp: 35F since midnight; normal low now 33F

DAILY RECORDS FOR NOVEMBER 2014:
11/2  – A NEW RECORD DAILY SNOWFALL: 1.8 INCHES;
surpasses the previous record of 0.2 ins. in 1906, 1951
11/14 – DAILY SNOWFALL RECORD EQUALED: 3.5 INCHES;
ties previous record on this date in 1997

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