Wednesday, July 1, 2015

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

DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, JULY 1, 2015
ALL TIMES ARE IN EASTERN STANDARD TIME

STRONG STORMS MOVE ACROSS SOUTHERN MASSACHUSETTS
THIS MORNING, 0.46 INCHES OF RAIN BY MID MORNING

July began with a bang this morning, with a thunderstorm
beginning on the summit of Great Blue Hill at 6:22 AM EST,
ending finally by 8:40 AM EST. Rain fell heavily for nearly
two hours, dropping 0.46 inches of new rain. Winds were gusty
out of the SE, topping out at 29 MPH officially.

By the 1:00 PM EST observation hazy sunshine was plentiful,
with showers distant to the WSW. These showers, once associated
with a severe thunderstorm, fell apart before reaching the
hill. Brisk southerly winds were blowing at 14 gusting to
19 knots.
PRELIMINARY STATS FOR JUNE 2015

TEMPERATURE, Deg. F
Avg. Max. 72.9 [-2.1] Avg. Min. 55.8 [-1.3] Mean      64.4 [-1.7] Corrected mean: 63.9
Max. for month: 86 on 6/12
Min. for month: 44 on 6/2 and 6/3

HEATING DEGREE DAYS
Total heating units: 101 [+28] Total for the season: 6505 [+129] Total for last season: 6422

COOLING DEGREE DAYS
Total cooling units: 89 [-16] Total for the season: 138 [+9] Total for last season: 109

PRECIPITATION, Inches
Total: 4.90 [+0.59] Greatest in 24 hrs: N/A

WIND, mph
Avg. uncorrected wind speed: 10.4
Avg. corrected wind speed: 10.9
Prevailing wind direction: S @ 12%
Peak gust and direction: 41 SSW on the 8th

SUNSHINE:
Astronomical total minutes:   N/A
Campbell-Stokes card minutes: N/A
Today’s Observations:

7 A.M.
Weather: Thunderstorm, beginning 6:22 AM EST,
heavy rain showers, fog
Temperature: 64F; Dew Point: 64F; Wind: SE at 17G24 kts,
Peak Wind: 25 kts SE @ 6:35 AM EST
Sea-level pressure: 29.88 ins. Hg, rising rapidly
Visibility: 1 mile, obscured by heavy rain and fog
6-hr Max temp: 64F
6-hr Min temp: 63F
24-hr precip: 0.25 inches
BHO SA 1155 W3 X 1TRW+F 118/64/64/1517G24/988/ TB22 PK WND 1325/35/
PRESRR/ 8//// 55004 ASOS 60021 70021 MANUAL 60025 70025 10064 20063

10 A.M.
Weather: Overcast stratus, bright spots overhead,
sun dimly visible
Temperature: 66F; Dew Point: 66F; Wind: SSE at 11G18 kts,
Sea-level pressure: 29.79 ins. Hg, falling, then more slowly
Visibility: 10 miles, thin fog
3-hr precip: 0.21 inches
BHO SA 1455 E3 OVC 10 089/66/66/1411G18/979/ BRGT SPTS OVHD THN FG
ALQDS SUN DMLY VSBL/ 8/6// 56029 ASOS 60028 MANUAL 60021

1 P.M.
Weather: Scattered cumulus, broken cirrocumulus,
few moderate cumulus in all directions, showers distant WSW
Temperature: 79F; Dew Point: 68F; Wind: SSW at 14G19 kts,
Sea-level pressure: 29.75 ins. Hg, falling, then more slowly
Visibility: 20 miles, hazy, showers distant
6-hr Max temp: 79F
6-hr Min temp: 64F
6-hr precip: 0.21 inches
BHO SA 1755 21 SCT E220 BKN 20 075/79/68/2014G19/975/
SHWRS DSNT WSW FEW MDT CU ALQDS HAZY/ 8/209 56014
ASOS 60028 MANUAL 60021 10079 20064
SUMMARY FOR TUESDAY, JUNE 30, 2015

TEMPERATURE (DEGREES F)
MAX…..81   NORMAL…..79
MIN…..60   NORMAL…..61
MEAN….71   NORMAL…..70

DEPARTURE FROM 30-YEAR NORMAL……………………+1
TOTAL DEPARTURE FOR THE MONTH…………………..-46 [-1.7 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………0  DEPARTURE………..-1
TOTAL HEATING UNITS FOR THE MONTH………….101  DEPARTURE……….+28
TOTAL HEATING UNITS FOR THE SEASON………..6505  DEPARTURE………+129
TOTAL HEATING UNITS LAST SEASON TO DATE……6422  DIFFERENCE………+83

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………6   DEPARTURE……….+0
TOTAL COOLING UNITS FOR THE MONTH…………..89   DEPARTURE………-16
TOTAL COOLING UNITS FOR THE SEASON…………138   DEPARTURE……….+9
TOTAL COOLING UNITS LAST SEASON TO DATE…….109   DIFFERENCE……..+29

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….21  S    AT   7:24 P.M.
ASOS……………………23  S    AT   7:27 P.M.
DAVIS…………………..20  S    AT   4:27 P.M. RMY N/A
FASTEST MILE FOR YESTERDAY…………………15  S    AT   7:28 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………16  S    AT   7:27 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..15  S    AT   7:27 P.M.
AVERAGE WIND SPEED AND DIRECTION…………. 8.0 WSW
ASOS…………………..8.9
DAVIS………………….MISSING

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…..0.25  DEPARTURE…..+0.14
ASOS……………0.21
TOTAL PRECIPITATION FOR THE MONTH………..0.25  DEPARTURE…..+0.14
ASOS……………0.21
TOTAL PRECIPITATION FOR THE YEAR………. 24.52   DEPARTURE….-2.43
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/+8/0.00/594/65               29 SSW RMY 32
6/12 86/65/76/+11/…./522/57              26 S   RMY 29
6/13 83/67/75/+10/T/586/64                 24 N   RMY 27
6/14 75/61/68/+2/0.00/641/70               21 SSE RMY 21
6/15 61/52/57/-9/…./000/00               25 SE  RMY 26
6/16 73/56/65/-1/…./009/01               18 NW  RMY N/A
6/17 70/57/64/-3/0.00/605/66               28 NE  RMY 28
6/18 76/54/65/-2/0.00/669/73               22 S   RMY 26
6/19 84/60/72/+5/T/642/70                  24 SSW RMY 22
6/20 75/56/66/-2/…./559/61               23 SSE RMY N/A
6/21 76/60/68/0/…./202/22                26 S   RMY 29
6/22 83/63/73/+5/0.00/770/84               20 WNW RMY 19
6/23 85/67/76/+8/0.01/284/31               36 S   RMY 38
6/24 82/62/72/+3/0.00/899/98               25 WNW RMY 27
6/25 80/60/70/+1/0.00/605/66               21 W   RMY N/A
6/26 72/58/65/-4/0.01/…/..               23 NNE RMY 21
6/27 73/56/65/-4/…./…/..               32 ESE RMY N/A
6/28 59/50/55/-15/…./000/00              39 ENE RMY 38
6/29 71/50/61/-9/…./…/..               17 SSW RMY 18
6/30 81/60/71/+1/T/…/..                  21 S   RMY N/A

7/1 low since midnight is 63F; normal low is now 61F

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 JULY 1
HIGH 98F IN 1964
LOW 44F IN 1988 [RECORD FOR MONTH] PRECIP 4.46 INS IN 1915 [RECORD FOR MONTH] PEAK GUST 52 MPH WNW IN 1974

RECORDS FOR JULY 2
HIGH 95F IN 1963
LOW 47F IN 1988
PRECIP 1.42 INS IN 1986
PEAK GUST 45 MPH SW IN 1999

TODAY’S REPORT PREPARED BY: Brian Fitzgerald