Thursday, June 18, 2015

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

DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, JUNE 18, 2015
ALL TIMES ARE IN EASTERN STANDARD TIME

DRY CONDITIONS CONTINUE INTO THURSDAY,
TEMPS CREEP INTO THE 70S

Thin high clouds and dry continues continue from Wednesday
into Thursday as temperatures slowly climbed into the 70s.
By the 1:00 PM EST observation thin high cirrus along with
some altocumulus were slowly increasing. A maximum temperature
of 76F had been reached.

Today’s Observations:

7 A.M.
Weather: Thin broken cirrus, few altocumulus distant in
all directions
Temperature: 59F; Dew Point: 48F; Wind: SW at 7 kts
Sea-level pressure: 30.14 ins. Hg, rising then more quickly
Visibility: 60 miles, light distant haze
6-hr Max temp: 59F
6-hr Min temp: 54F
24-hr precip: none
BHO SA 1155 E250 -BKN 60 206/59/48/2307/014/ FEW AC ALQDS
LGT DSNT HZ ALQDS/ 8/041 53005 10059 20054

10 A.M.
Weather: Thin broken cirrus, few altocumulus distant in
all directions
Temperature: 69F; Dew Point: 48F; Wind: SSW at 7 kts
Sea-level pressure: 30.11 ins. Hg, rising, then falling and lower
Visibility: 60 miles, light distant haze
BHO SA 1455 E250 -BKN 60 198/69/48/2007/011/ FEW AC ALQDS
LGT DSNT HZ ALQDS/ 8/041 58008

1 P.M.
Weather: Thin broken cirrus, few cumulus distant W-NNW,
few altocumulus distant ENE-WNW
Temperature: 76F; Dew Point: 49F; Wind: S at 7G15 kts
Sea-level pressure: 30.06 ins. Hg, falling, then more quickly
Visibility: 60 miles, light distant haze
6-hr Max temp: 76F
6-hr Min temp: 58F
6-hr precip: none
BHO SA 1755 E250 -BKN 60 181/76/49/1907G15/006/ FEW CU DSNT W-NNW
FEW AC DSNT ENE-WNW LGT DSNT HZ ALQDS/ 8/141 58017 10076 20058
SUMMARY FOR WEDNESDAY, JUNE 17, 2015

TEMPERATURE (DEGREES F)
MAX…..70   NORMAL…..76
MIN…..57   NORMAL…..58
MEAN….64   NORMAL…..67

DEPARTURE FROM 30-YEAR NORMAL……………………-3
TOTAL DEPARTURE FOR THE MONTH…………………..-33 [-2.1 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………1  DEPARTURE………..-1
TOTAL HEATING UNITS FOR THE MONTH…………..87  DEPARTURE……….+29
TOTAL HEATING UNITS FOR THE SEASON………..6491  DEPARTURE………+130
TOTAL HEATING UNITS LAST SEASON TO DATE……6421  DIFFERENCE………+70

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………..0   DEPARTURE……….-4
TOTAL COOLING UNITS FOR THE MONTH………….41   DEPARTURE……….-3
TOTAL COOLING UNITS FOR THE SEASON…………90   DEPARTURE………+22
TOTAL COOLING UNITS LAST SEASON TO DATE…….49   DIFFERENCE……..+41

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………28  NE   AT   8:53 A.M.
ASOS…………………..30  NE   AT   8:36 A.M.
DAVIS………………….26  NE   AT   8:08 A.M. RMY 28
FASTEST MILE FOR YESTERDAY………………..19  NE   AT   8:35 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..20  ENE  AT   9:12 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….18  NE   AT   8:33 A.M.
AVERAGE WIND SPEED AND DIRECTION…………..9.5 NW
ASOS…………………..9.7
DAVIS………………….8.0 NNE [016 deg.] *last of several occurrences…

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………..2.18   DEPARTURE….-0.54
ASOS……………2.19
TOTAL PRECIPITATION FOR THE YEAR………. 21.55   DEPARTURE….-3.70
ASOS……………N/A ***
*** ASOS annual totals not available due to erroneous readings

PRELIMINARY CLIMATE SUMMARY FOR JUNE 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

6/1  48/46/47/-15/0.69/000/00              32 NE  RMY 34
6/2  47/44/46/-16/…./000/00              28 NNE RMY 28
6/3  59/44/52/-10/0.00/172/19              16 ESE RMY 16
6/4  63/46/55/-8/0.00/445/49               17 E   RMY 16
6/5  70/49/60/-3/T/500/55                  17 NNE RMY 17
6/6  65/52/59/-4/0.06/382/42               26 ENE RMY 27
6/7  73/49/61/-3/0.00/884/97               28 S   RMY 29
6/8  73/50/62/-2/T/310/34                  41 SSW RMY 48
6/9  76/61/69/+4/0.03/228/25               29 SSW RMY 32
6/10 82/57/70/+5/0.00/840/92               24 WSW RMY N/A
6/11 85/61/73/+8/0.00/…/..               29 SSW RMY 32
6/12 86/65/76/+11/…./…/..              26 S   RMY 29
6/13 83/67/75/+10/T/…/..                 24 N   RMY 27
6/14 75/61/68/+2/0.00/…/..               21 SSE RMY 21
6/15 61/52/57/-9/…./000/00               25 SE  RMY 26
6/16 73/56/65/-1/…./…/..               18 NW  RMY N/A
6/17 70/57/64/-3/0.00/…/..               28 NE  RMY 28

6/18 low since midnight is 54F; normal low is now 58F

DAILY RECORDS FOR JUNE 2015
6/1- NEW RECORD LOW MAXIMUM TEMPERATURE OF 48F
surpasses previous record of 51F in 2004

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

RECORDS FOR JUNE 18
HIGH 93F IN 1929,1994
LOW 39F IN 1920
PRECIP 3.36 INS 1998
PEAK GUST 48e MPH W IN 1943

RECORDS FOR JUNE 19
HIGH 92F IN 1923
LOW 40F IN 1920
PRECIP 3.92 INS 1922
PEAK GUST 66e MPH NW IN 1940

TODAY’S REPORT PREPARED BY: Brian Fitzgerald