Thursday, June 11, 2015
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, JUNE 11, 2015
ALL TIMES ARE IN EASTERN STANDARD TIME
SUMMER WEATHER IS FINALLY HERE AT LAST!
SUNNY TO PARTLY SUNNY, VERY WARM AND INCREASING HUMID
WITH HAZE LIMITING VISIBILITY TO UNDER 10 MILES BY
THE LATE MORNING AND AFTERNOON
CONSIDERABLE HIGH CIRRUS CLOUDS OVERHEAD ALL DAY
The humidity increased dramatically during the early hours
of today with dew points going from the 50’s to the mid-60’s
by early afternoon along with temperatures rising to 84 degrees.
Wind have been prevailing from the WSW with gusts to 20 to 30 mph.
Cirrus clouds, some of them dense, have been observed all day.
Today’s Observations:
7 A.M.
Weather: Scattered dense cirrus, broken dense cirrus, broken cirrus,
two levels partly thin, few altocumulus chaotic
Temperature: 67F; Dew Point: 61F; Wind: SSW at 12 kts
Sea-level pressure: 29.85 ins. Hg, rising then more slowly
Visibility: 12 miles, hazy
6-hr Max temp: 67F
6-hr Min temp: 61F
24-hr precip: 0.00
BHO SA 1155 200 SCT E220 BKN 250 BKN 300 OVC 12 105/67/61/
2112/984/ FEW AC CHAOTIC DNS CI ALQDS BINOVC VC N
250/300 LYRS PTLY THN HAZY/ 8/092 51009 10067 20061
10 A.M.
Weather: Broken dense cirrus, overcasst cirrus, thin spots in
the overcast
Temperature: 78F; Dew Point: 65F; Wind: WNW at 5 kts,
Wind: Gust to 20 kts past hour
Sea-level pressure: 29.85 ins. Hg, rising slightly
Visibility: 9 miles, hazy
BHO SA 1455 E220 BKN 250 OVC 9 105/78/65/2212/984/
DNS CI OVC PTLY THN HAZY GST TO 20 KTS PST HR/ 8/002 53000
1 P.M.
Weather: Scattered cumulus, few moderate, scattered dense cirrus,
overcast cirrus/cirrostratus hence a “7” code.
Temperature: 83F; Dew Point: 66F; Wind: WSW at 12G20 kts,
Sea-level pressure 29.82 ins. Hg, falling then more quickly
Visibility: 8 miles, hazy
6-hr Max temp: 84F
6-hr Min temp: 64F
BHO SA 1755 40 SCT 220 SCT E250 OVC 8 097/83/66/2412G20/982/
FEW MDT CU VC THN SPTS IOVC HAZY/ 8/007 58008 10084 20067
SUMMARY FOR WEDNESDAY, JUNE 10, 2015
TEMPERATURE (DEGREES F)
MAX…..82 NORMAL…..73
MIN…..57 NORMAL…..56
MEAN….70 NORMAL…..65
DEPARTURE FROM 30-YEAR NORMAL……………………+5
TOTAL DEPARTURE FOR THE MONTH…………………..-56 [-5.3 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………0 DEPARTURE………..-3
TOTAL HEATING UNITS FOR THE MONTH…………..78 DEPARTURE……….+38
TOTAL HEATING UNITS FOR THE SEASON………..6482 DEPARTURE………+139
TOTAL HEATING UNITS LAST SEASON TO DATE……6414 DIFFERENCE………+68
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………..5 DEPARTURE……….+2
TOTAL COOLING UNITS FOR THE MONTH…………..9 DEPARTURE………-13
TOTAL COOLING UNITS FOR THE SEASON…………58 DEPARTURE………+13
TOTAL COOLING UNITS LAST SEASON TO DATE…….39 DIFFERENCE……..+19
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………24 WSW AT 12:20 A.M. *
ASOS…………………..27 WSW AT 12:16 A.M.
DAVIS………………….26 WSW AT 12:15 A.M. RMY N/A2
FASTEST MILE FOR YESTERDAY………………..19 W AT 12:18 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..20 W AT 12:20 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….18 WSW AT 12:16 A.M.
AVERAGE WIND SPEED AND DIRECTION…………..11.4 W
ASOS…………………..11.5
DAVIS………………….10.1 WSW [240 deg.]
* Last of several occurrences…
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…..0.00 DEPARTURE….-0.16
ASOS……………0.00
TOTAL PRECIPITATION FOR THE MONTH………..1.58 DEPARTURE….-0.07
ASOS……………1.60
TOTAL PRECIPITATION FOR THE YEAR………. 20.95 DEPARTURE….-3.23 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/-10/0.00/17219 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/…/.. 24 WSW RMY N/A
6/11 low since midnight is 61F; normal low is now 57F
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 12
HIGH 92F IN 1973
LOW 40F IN 1906
PRECIP 1.79 INS 1955
PEAK GUST 58 MPH NW IN 1991
TODAY’S REPORT PREPARED BY: Robert Skilling
