Friday, June 20, 2014

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

DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, JUNE 20, 2014
ALL TIMES ARE IN EASTERN STANDARD TIME

WARM BUT TURNING DRAMATICALLY DRIER YESTERDAY
DEW POINT DROPS TO UPPER 30’S DURING YESTERDAY EVENING!
SUNNY AND COOLER, CONTINUED DRY TODAY

Yesterday we recorded a sharp fall in the dew points
from the 60’s in the morning to the 40’s and even the
upper 30’s by late afternoon and last evening. The
lowest dew point temperature on the hour as recorded
by the ASOS system was 37F at 10 P.M. EDT.
Early this morning our dew point temperatures
began climbing back into the 40’s.

Today is sunny and cooler than the high of 81F which
was recorded yesterday afternoon. A high of 74F was
recorded as of 2 P.M. EDT

Tomorrow the summer solstice occurs at 6:51 A.M. EDT.

Today’s Observations:

7 A.M.
Weather: Clear, few cumulus fractus, cumulus forming distant
NNE-ESE, few patches altocumulus, lenticularis, floccus to
the distant ENE-ESE, patch thin cirrus radiatus distant N-NE,
cirrus layer extending distant S-W
Temperature: 63F; Dew Point: 48F; Wind: NW at 8 kts
Sea-level pressure: 29.95 ins. Hg, about steady
Visibility: 75 miles, light distant haze
6-hr max temp: 63F
6-hr min temp: 55F
24-hr precip: None
BHO SA 1155 CLR 75 143/63/48/3208/995/ FEW CUFRA/CU FRMG DSNT NNE-ESE
FEW PTCHS AC/ACSL/ACC DSNT ENE-ESE CI LYR XTDNG DSNT S-W PTCH CI
DSNT N-NE LGT DST HZ/ 8/181 56001 10063 20055

10 A.M.
Weather: Clear, cumulus fractus, cumulus forming all quadrants,
cirrus/cirrostratus layer extending S-W
Temperature: 70F; Dew Point: 44F; Wind: NW at 8 kts,
Wind: Gust to 20 kts past hour
Sea-level pressure: 29.93 ins. Hg, falling then more rapidly
Visibility: 75 miles, light distant haze
BHO SA 1455 CLR 75 135/70/44/3208/993/ CUFRA/CU FRMG ALQDS CI/CS LYR
XTDNG DSNT S-W/ 8/108 58008

1 P.M.
Weather: Clear, cumulus fractus, cumulus all quadrants,
layer of cirrus/cirrostratus S-W
Temperature: 73F; Dew Point: 42F; Wind: NW at 10 kts,
Wind: Direction variability WSW-N
Sea-level pressure: 29.90 ins. Hg, falling then more rapidly
Visibility: 75 miles, light distant haze
BHO SA 1755 CLR 75 126/73/42/3110/990/ CUFRA/CU ALQDS CI/CS LYR S-W
WND 25V36/ 8/108 58009 10074 20063

WEATHER SUMMARY FOR THURSDAY, JUNE 19, 2014

TEMPERATURE (DEGREES F)
MAX…..81    NORMAL…..76
MIN…..61    NORMAL…..58
MEAN….71    NORMAL…..67

DEPARTURE FROM 30-YEAR NORMAL…………………….+4
TOTAL DEPARTURE FOR THE MONTH……………………+34 [+1.6 DEGREE/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………0  DEPARTURE……….-2
TOTAL HEATING UNITS FOR THE MONTH…………..27  DEPARTURE………-35
TOTAL HEATING UNITS FOR THE SEASON………..6421  DEPARTURE………+56
TOTAL HEATING UNITS LAST SEASON TO DATE……5781  DIFFERENCE…. ..+640

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………..6  DEPARTURE………..+2
TOTAL COOLING UNITS FOR THE MONTH………….51   DEPARTURE………..0
TOTAL COOLING UNITS FOR THE SEASON…………64   DEPARTURE………-11
TOTAL COOLING UNITS LAST SEASON TO DATE…….70   DIFFERENCE………-6

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………24  NW   AT   6:23 P.M.
ASOS…………………..26  NW   AT   6:22 P.M.
DAVIS………………….23  WNW  AT   6-7  P.M. RMY 25
FASTEST MILE FOR YESTERDAY………………..18  NW   AT   6:07 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..18  NW   AT   6:28 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….16  NW   AT   6:06 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..10.1 NW
ASOS……………………9.5
DAVIS…………………..8.6 NW [310 deg]

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……….1.92  DEPARTURE……….-1.09
ASOS…………..1.87
TOTAL PRECIPITATION FOR THE YEAR……….24.26  DEPARTURE……….-1.41
ASOS………….24.39

PRELIMINARY CLIMATE SUMMARY FOR JUNE 2014 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  72/47/60/-2/0.00/887/98              21 NNW RMY 21
6/2  81/52/67/+5//0.00/879/97             22 SSW RMY 23
6/3  81/57/69/+7/0.00/889/98              25 SSE RMY 28
6/4  64/52/58/-5/0.11/000/00              16 SE  RMY N/A
6/5  60/55/58/-5/0.91/000/00              21 NNW RMY 24
6/6  73/54/64/+1/0.00/655/72              22 WNW RMY 23
6/7  82/56/69/+5/0.00/893/98              21 W   RMY 22
6/8  84/63/74/+10/0.00/702/77             18 SW  RMY N/A
6/9  77/61/69/+5/0.13/046/05              21 WSW RMY 22
6/10 80/56/68/+3/0.10/183/20              29 ENE RMY 33
6/11 69/55/62/-3/T/439/48                 21 ENE RMY 20
6/12 70/56/63/-2/0.00/101/11              21 ESE RMY N/A
6/13 67/58/63/-2/…./000/00              25 E   RMY N/A
6/14 73/58/66/0/…./…/..               23 WNW RMY 24
6/15 78/53/66/0/0.00/…/..               25 NNW RMY 27
6/16 79/56/68/+2/0.00/…/..              23 S   RMY N/A
6/17 81/58/70/+3/T/…/..                 25 S   RMY 24
6/18 83/65/74/+7/T/…/..                 35 W   RMY 38
6/19 81/61/71/+4/0.00/…/..              24 NW  RMY 25

6/20 morning low temp: 55F; the normal low is now 59F

DAILY RECORDS FOR JUNE 2014
None so far.

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

RECORDS FOR JUNE 20
HIGH 94F IN 1953
LOW 41F IN 1918
PRECIP 2.62 INS 1945
PEAK GUST 63 MPH NE IN 1967, SSW IN 2010

RECORDS FOR JUNE 21
HIGH 94F IN 2012
LOW 42F IN 1940
PRECIP 1.40 INS 1903
PEAK GUST 51 MPH SSW IN 2000

TODAY’S REPORT PREPARED BY: Robert Skilling