Friday, September 25, 2015
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, SEPTEMBER 25, 2015
ALL TIMES ARE IN EASTERN STANDARD TIME
HIGH CLOUDS INCREASE AND TEMPERATURES CONTINUE COOL
Considerable high cloudiness and cool with northeast
winds today and temperatures rise from 53E to the
middle 60’s by afternoon.
Today’s Observations:
7 A.M.
Weather: Thin scattered cirrus, overcast thin cirrus, lower cirrus
NW-NE, and distant S
Temperature: 57F; Dew Point: 52F; Wind: NNE at 8 kts,
Sea-level pressure: 30.41 ins. Hg, rising slightly
Visibility: 30 miles, light distant haze, except WNW 45, NE 40
6-hr Max temp: 57F
6-hr Min temp: 53F
24-hr precip: none
BHO SA 1155 250 –SCT 300 –OVC 30 298/57/52/0308/041/
PTCH CU/MDT CU NE-ENE ALGSHR LWR CI NW-NE AND DSNT S
HAZY VSBY NE 40 WNW 45/ 8/201 53005 10057 20053
10 A.M.
Weather: Scattered cumulus, moderate cumulus and stratocumulus,
scattered altocumulus lenticularis, overcast dense cirrus
Temperature: 62F; Dew Point 53F; Wind: ENE at 8 kts,
Wind: Direction variable NNE-E
Sea-level pressure: 30.44 ins. Hg, rising, then falling but higher
than 3 hours ago
Visibility: 50 miles, light distant haze
BHO SA 1455 25 SCT 150 SCT E220 OVC 50 309/62/53/0608/044/
CU/SC FEW MDT CU FEW ACSL NW-NE WND 03V10/ 8/242 50011
1 P.M.
Weather: Scattered cirrus, thin overcast cirrus, few cirrocumulus,
cumulus all quadrants
Temperature: 64F; Dew Point: 50F; Wind: NE at 8 kts
Sea-level pressure: 30.43 ins. Hg, falling slightly
Visibility: 50 miles, light distant haze
6-hr Max: 66F
6-hr Min: 57F
BHO SA 220 SCT 250 -OVC 50 305/64/50/0508/043/ FEW CU ALQDS
FEW CC LGT DSNT HZ/ 8/101 58004 10066 20057
SUMMARY FOR THURSDAY, SEPTEMBER 24, 2015
TEMPERATURE (DEGREES F)
MAX…..72 NORMAL…..69
MIN…..56 NORMAL…..52
MEAN….64 NORMAL…..60
DEPARTURE FROM 30-YEAR NORMAL……………………+4
TOTAL DEPARTURE FOR THE MONTH………………….+127 [+5.1 DEGREES/DAY]
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………0 DEPARTURE……….-1
TOTAL COOLING UNITS FOR THE MONTH………….131 DEPARTURE………+76
TOTAL COOLING UNITS FOR THE SEASON…………797 DEPARTURE……..+205
TOTAL COOLING UNITS LAST SEASON TO DATE…….571 DIFFERENCE…….+226
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………1 DEPARTURE……….-5
TOTAL HEATING UNITS FOR THE MONTH…………..21 DEPARTURE………-53
TOTAL HEATING UNITS FOR THE SEASON………….22 DEPARTURE………-77
TOTAL HEATING UNITS LAST SEASON TO DATE……..80 DIFFERENCE……..-58
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….22 E AT 1:53 P.M.
ASOS……………………23 E AT 1:53 P.M.
DAVIS…………………..20 E AT 12:05 P.M. RMY 21
FASTEST MILE FOR YESTERDAY……………….. 16 E
MAXIMUM 2-MINUTE ASOS AVERAGE………………16 ENE AT 1:55 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..16 E AT 1:54 P.M.
AVERAGE WIND SPEED AND DIRECTION………….10.2 E
ASOS………………….10.4
DAVIS………………….9.4 ENE [060 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………..1.35 DEPARTURE…..-1.82
ASOS……………1.33
TOTAL PRECIPITATION FOR THE YEAR………..31.60 DEPARTURE…..-6.58
ASOS…………….N/A ***
*** ASOS annual total not available due to erroneous readings
PRELIMINARY CLIMATE SUMMARY FOR SEPTEMBER 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
9/1 81/65/73/+5/0.00/766/97 20 SSW RMY 20
9/2 89/64/77/+9/0.00/732/93 20 SW RMY 21
9/3 85/66/76/+9/T/612/78 17 E RMY N/A TSTM
9/4 72/58/65/0/0.00/297/38 31 ENE RMY N/A
9/5 77/55/66/-1/0.00/748/96 14 SW RMY 18
9/6 87/57/72/+5/0.00/753/97 21 SSW RMY 22
9/7 92/63/78/+12/0.00/727/94 23 WSW RMY 24
9/8 97/70/84/+18/0.00/693/90 22 WSW RMY 24
9/9 92/70/81/+15/0.00/683/89 30 SSW RMY 33
9/10 73/62/68/+3/…./000/00 29 NE RMY N/A
9/11 70/59/65/0/…./084/11 33 NE RMY N/A
9/12 75/58/67/2/…./380/50 18 SSE RMY 25
9/13 66/60/63/-1/…./000/00 25 E RMY N/A
9/14 70/53/62/-2/0.00/550/73 33 W RMY 35
9/15 82/56/69/+5/0.00/736/98 23 W RMY N/A
9/16 84/62/73/+10/0.00/711/95 17 NW RMY N/A
9/17 87/64/76/+13/0.00/723/97 17 SW RMY 16
9/18 86/64/75/+13/0.00/712/96 21 SSW RMY 21
9/19 80/62/71/+9/0.00/…/.. 22 S RMY N/A
9/20 74/55/65/+3/T/…./… 24 S RMY N/A
9/21 65/50/58/-3/0.00/…/.. 29 ENE RMY 30
9/22 67/55/61/+0/0.00/…/.. 21 E RMY 21
9/23 72/50/61/+1/0.00/…/.. 15 E RMY N/A
9/24 72/56/64/+4/0.00/…/.. 22 E RMY 21
9/25 low since midnight is 53F; normal low is now 52F
DAILY RECORDS FOR SEPTEMBER 2015
**9/7 DAILY RECORD MAXIMUM TEMPERATURE OF 92F
TIES PREVIOUS RECORD SET IN 2007**
**9/8 DAILY RECORD MAXIMUM TEMPERATURE OF 97F
BREAKS PREVIOUS RECORD OF 93F SET IN 2007**
**9/8 DAILY RECORD HIGH MINIMUM TEMPERATURE OF 70F
BREAKS PREVIOUS RECORD OF 69F SET IN 1999**
**9/9 DAILY RECORD MAXIMUM TEMPERATURE OF 92F
BREAKS PREVIOUS RECORD OF 91F SET IN 2002**
**9/9 DAILY RECORD HIGH MINIMUM TEMPERATURE OF 70F
BREAKS PREVIOUS RECORD OF 69F SET IN 1999**
**9/17 DAILY RECORD MAXIMUM TEMPERATURE OF 87F
BREAKS PREVIOUS RECORD OF 86F SET IN 1915, 1941, AND 1991**
**9/18 DAILY RECORD HIGH MINIMUM TEMPERATURE OF 64F
TIES PREVIOUS RECORD SET IN 1992**
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR SEPTEMBER 25
HIGH 87F IN 1970
LOW 31F IN 1950
PRECIP 2.68 INCHES IN 1961
PEAK GUST 63 MPH SSW IN 1991
RECORDS FOR SEPTEMBER 26
HIGH 91F IN 2007
LOW 36F IN 1905,1922,1978
PRECIP 3.84 INCHES IN 1888
PEAK GUST 54e MPH S IN 1977
TODAY’S REPORT PREPARED BY: Robert Skilling
