Friday, June 26, 2015

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

DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, JUNE 26, 2015
ALL TIMES ARE IN EASTERN STANDARD TIME

Sky clears after period of light rain and showers
this morning left just 0.01 inch. Sunshine and temps.
up to 70F by early afternoon after low of 58F just
after 0830E this morning during the rain.

Today’s Observations:

7 A.M.
Weather: Overcast nimbostratus, light rain (very light)
Temperature: 61F; Dew Point: 50F; Wind: N at 10 kts
Sea-level pressure: 30.02 ins. Hg, increasing then more quickly
Visibility: 25 miles, light rain, WNW-NNE 15, SE-S 30
6-hr Max temp: 66F
6-hr Min temp: 61F
24-hr precip: trace
BHO SA 1155 E60 OVC 25R- 166/61/50/3510/002/ VSBY W-NNE 15
SE-S 30 RB10 PCPN VRY LGT/ 8/02/ 53019 MANUAL 6000/ 70000
10066 20061

10 A.M.
Weather: Broken altocumulus, cumulus forming distant W-NW,
sky clearing from SW-NW
Temperature: 62F; Dew Point: 55F; Wind: NNE at 6 kts
Sea-level pressure: 30.02 ins. Hg, same as 3 hours ago
Visibility: 35 miles, distant haze, WNW 45; E-SE 25 SHRA DSNT
3-hr precip: 0.01 in.
BHO SA 1455 E90 BKN 35 166/62/55/0306/002/ CU FRMG DSNT W-NW
SKY CLRG SW-NW VSBY WNW 50 E-SE 25 PCPN DSNT E-SE/
8/570 55000 MANUAL 6001/ ASOS 60001

1 P.M.
Weather: Scattered cumulus and stratocumulus generated by cumulus
SW-N, few altocumulus distant NE-E, 2 cirrostratus layers one is
scattered at 25000 and the other very thin at 30000 ft both invading
the sky.
Temperature: 69F; Dew Point: 55F; Wind: ENE at 10 kts
Sea-level pressure: 30.01 ins. Hg, falling slightly
Visibility: 55 miles, light distant haze
6-hr Max temp: 70F
6-hr Min temp: 58F
6-hr precip: 0.01 in.
BHO SA 1755 40 SCT 80 SCT 250 SCT 300 –BKN 55 164/69/55/0610/001/
CU/SCCG SW-N FEW AC DSNT NE-ESE LYRS 250/300 INVADING LGT DSNT HZ/
8/446 58002 MANUAL 6001/ ASOS 60001 10070 20058

SUMMARY FOR THURSDAY, JUNE 25, 2015

TEMPERATURE (DEGREES F)
MAX…..80   NORMAL…..78
MIN…..60   NORMAL…..60
MEAN….70   NORMAL…..69

DEPARTURE FROM 30-YEAR NORMAL……………………+1
TOTAL DEPARTURE FOR THE MONTH…………………..-15 [-0.8 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………0  DEPARTURE………..-1
TOTAL HEATING UNITS FOR THE MONTH…………..87  DEPARTURE……….+17
TOTAL HEATING UNITS FOR THE SEASON………..6491  DEPARTURE………+119
TOTAL HEATING UNITS LAST SEASON TO DATE……6422  DIFFERENCE………+69

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………5   DEPARTURE………..0
TOTAL COOLING UNITS FOR THE MONTH…………..83   DEPARTURE……….+6
TOTAL COOLING UNITS FOR THE SEASON…………132   DEPARTURE………+31
TOTAL COOLING UNITS LAST SEASON TO DATE……..81   DIFFERENCE……..+51

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….22 W    AT   2:33 P.M.
ASOS……………………22 W    AT   2:33 P.M.
DAVIS…………………..19 WNW  AT   1:41 P.M. RMY N/A
FASTEST MILE FOR YESTERDAY…………………14 W    AT   2:54 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………15 W    AT   2:55 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..13 W    AT   1:55 P.M.
AVERAGE WIND SPEED AND DIRECTION…………. 8.1 NW
ASOS…………………..8.5
DAVIS………………….6.9 W [280 deg.] * Last of several occurrences…

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…..trace  DEPARTURE….-0.12
ASOS……………0.00
TOTAL PRECIPITATION FOR THE MONTH………..3.38   DEPARTURE….-0.36
ASOS……………3.39
TOTAL PRECIPITATION FOR THE YEAR………. 22.75   DEPARTURE….-3.52
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/…/..               28 NE  RMY 28
6/18 76/54/65/-2/0.00/…/..               22 S   RMY 26
6/19 84/60/72/+5/T/…/..                  24 SSW RMY 22
6/20 75/56/66/-2/…./…/..               23 SSE RMY N/A
6/21 76/60/68/0/…./…/..                26 S   RMY 29
6/22 83/63/73/+5/0.00/…/..               20 WNW RMY 19
6/23 85/67/76/+8/0.01/…/..               36 S   RMY 38
6/24 82/62/72/+3/0.00/…/..               25 WNW RMY 27
6/25 80/60/70/+1/0.00/…/..               21 W   RMY N/A

6/26 low since midnight is 58F after 7 A.M.; normal low is now 60F

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 26
HIGH 96F IN 1952
LOW 45F IN 1986
PRECIP 1.52 INS IN 1945
PEAK GUST 48 MPH N IN 1998

RECORDS FOR JUNE 27
HIGH 93F IN 1999, 2007
LOW 46F IN 1897
PRECIP 1.72 INS IN 1938
PEAK GUST 55e N IN 1945

TODAY’S REPORT PREPARED BY: Robert Skilling