Sunday, June 7, 2015

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, JUNE 7, 2015
ALL TIMES ARE IN EASTERN STANDARD TIME

PARTLY CLOUDY SKIES AND WARMER TEMPERATURES BEGIN THE DAY

After another cool morning with a low of 49F, temperatures have rebounded
into the 70’s as dry air moves into the region.  Some high clouds have been
moving through the region with multiple types of cirrus clouds seen today.
The air at the surface has been very dry leading to good visibilities for
the day with an average visibility of 70 miles but a thin haze has begun
to move into the region reducing visibilities as we head into the afternoon.
Winds so far have been very light and variable throughout the day with a
maximum gust at only 14 mph by the 1 o’clock observation.  The dry weather
helped to create a small brush fire Northeast of the Observatory with smoke
noted for the 1 o’clock observation.

Today’s Observations:

7 A.M.
Weather: Scattered Cirrostratus, Few Cirrocumulus
Temperature: 57F; Dew Point: 39F; Wind: N at 7 kts
Sea-level pressure: 30.19 ins. Hg, rising
Visibility: 70 miles
6-hr Max temp: 57F
6-hr Min temp: 49F
24-hr precip: 0.00 ins.
BHO SA 1155 250 SCT 70 226/57/39/0607/019 FEW CC ALQDS
8/009 51012 10057 20049

10 A.M.
Weather: Few Cirrus, Few Cirrostratus distant ENE-SSE
Temperature: 66F; Dew Point: 41F; Wind: N at 3 kts
Wing: Light and variable
Sea-level pressure: 30.22 ins. Hg, rising
Visibility: 70 miles
BHO SA 1455 CLR 70 237/66/41/0003/022 FEW CI FEW CS DSNT ENE-SSE 8/004 51011

1 P.M.
Weather: Scattered Cirrostratus, Few Cirrus, Very Light Distant Haze, Smoke
4 mi NE of observatory from a brush fire drifting west
Temperature: 71F; Dew Point: 39F;  Wind: VRB at 3 kts
Wind: Light and variable
Sea-level pressure 30.18 ins. Hg, rising then falling
Visibility: 70 miles
6-hr Max temp: 71F
6-hr Min temp: 57F
BHO SA 1755 250 SCT 70 222/71/39/VRB05/018   FEW CI ALQDS VRY LGT DSNT HZ
SMK NE DRFTNG W FRM BRUSH FIRE 8/005 58016 10071 20057

SUMMARY FOR SATURDAY, JUNE 6, 2015

TEMPERATURE (DEGREES F)
MAX…..65   NORMAL…..72
MIN…..52   NORMAL…..54
MEAN….59   NORMAL…..63

DEPARTURE FROM 30-YEAR NORMAL……………………-4
TOTAL DEPARTURE FOR THE MONTH…………………..-56 [-9.5 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………6  DEPARTURE………..+2
TOTAL HEATING UNITS FOR THE MONTH…………..71  DEPARTURE……….+45
TOTAL HEATING UNITS FOR THE SEASON………..6475  DEPARTURE………+146
TOTAL HEATING UNITS LAST SEASON TO DATE……6414  DIFFERENCE………+61

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………..0   DEPARTURE……….-2
TOTAL COOLING UNITS FOR THE MONTH…………..0   DEPARTURE………-11
TOTAL COOLING UNITS FOR THE SEASON…………49   DEPARTURE………+14
TOTAL COOLING UNITS LAST SEASON TO DATE…….19   DIFFERENCE……..+30

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………26  ENE  AT  12:21 P.M.*
ASOS…………………..29  NE   AT  12:13 P.M.
DAVIS………………….26  NE   AT  12:13 P.M. RMY 27
FASTEST MILE FOR YESTERDAY………………..20  ENE  AT  2:01 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..21  E    AT  2:01 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….19  ENE  AT  12:14 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..8.5 ENE
ASOS…………………..9.1
DAVIS………………….5.9 SE [138 deg.] * Last of several occurrences…

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…..0.00   DEPARTURE….-0.17
ASOS……………0.00
TOTAL PRECIPITATION FOR THE MONTH………..1.55   DEPARTURE….+0.55
ASOS……………1.57
TOTAL PRECIPITATION FOR THE YEAR………. 20.86   DEPARTURE….-2.61
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/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

6/1  48/46/47/-15/0.69/0.0/000/00              32 NE  RMY 34
6/2  47/44/46/-16/…./0.0/000/00              28 NNE RMY 28
6/3  59/44/52/-10/0.00/0.0/…/..              16 ESE RMY 16
6/4  63/46/55/-8/0.00/0.0/…/..               17 E   RMY 16
6/5  70/49/60/-3/T/0.0/…/..                  17 NNE RMY 17
6/6  65/52/59/-4/0.00/0.0/…/..               26 ENE RMY 27

6/7 low since midnight is 49F; normal low is now 54F

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 7
HIGH 93F IN 1999
LOW 40F IN 1932
PRECIP 4.01 INS IN 2006
PEAK GUST 58 MPH NE IN 1982

RECORDS FOR JUNE 8
HIGH 94F IN 1984
LOW 37F IN 1932
PRECIP 1.53 INS IN 1947
PEAK GUST 86e MPH WNW IN 1946 [Record for month]

TODAY’S REPORT PREPARED BY: Robert Millette