Saturday, September 26, 2015
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, SEPTEMBER 26, 2015
ALL TIMES ARE IN EASTERN STANDARD TIME
TODAY IS 6TH CONSECUTIVE DAY WITH WINDS FROM THE EAST
VARIABLE HIGH CLOUDINESS AS COOLING TREND CONTINUES
Starting September 21 and continuing each day into today
our winds have had an easterly component as large high
continues to build down from the north. Barometer readings
have risen to 30.50 inches and slightly higher
Variable high cloudiness but a mostly sunny sky.
Today’s Observations:
7 A.M.
Weather: Thin scattered cirrus, overcast thin cirrus, line of
cumulus/stratocumulus distant NNE, few stratocumulus NE-E along
and offshore, break in overcast with clear sky band distant
NW-NE, patch altocumulus lenticularis distant WSW, layer of lower
cirrus, cirrostratus SE-SW
Temperature: 52F; Dew Point: 45F; Wind: NNE at 9 kts,
Sea-level pressure: 30.49 ins. Hg, rising then more slowly
Visibility: 30 miles, light distant haze, except WNW 45, NE 40
6-hr Max temp: 54F
6-hr Min temp: 49F
24-hr precip: none
BHO SA 1155 250 -SCT 300 -OVC 50 324/52/45/0209/049/
SHRT LINE SC DSNT NNE FEW SC ALG OFFSHR NE-E PTCH ACSL DSNT WSW
BINOVC/CLR SKY BND DSNT NW-NE LWR CI/CS LYR SE-SW VSBY NW 60 LGT
DSNT HZ/ 8/547 51017 10054 20049
10 A.M.
Weather: Broken stratocumulus, broken cirrus
Temperature: 60F; Dew Point 48F; Wind: ENE at 16G21 kts,
Sea-level pressure: 30.53 ins. Hg, rising, then falling more slowly
Visibility: 50 miles, light distant haze
BHO SA 1455 E23 BKN 250 BKN 50 339/60/48/0616G21/053/ LGT DSNT HZ/
8/501 51015
1 P.M.
Weather: Thin broken cirrus (2 levels), few small cumulus
distant ESE-S-W
Temperature: 61F; Dew Point: 44F; Wind: ENE 13 kts
Sea-level pressure: 30.53 ins. Hg, falling slightly
Visibility: 600 miles, NW 70 miles, light distant haze
6-hr Max: 63F
6-hr Min: 52F
BHO SA 1755 250 -BKN 300 -BKN 60 337/61/44/0613/053/ FEW SML CU
DSNT ESE-S-W CLR SKY BND DSNT NW-NE LWR CI SE-SW VSBY NW 70
LGT DSNT HZ/ 8/101 58002 10063 20052
SUMMARY FOR FRIDAY, SEPTEMBER 25, 2015
TEMPERATURE (DEGREES F)
MAX…..66 NORMAL…..68
MIN…..53 NORMAL…..51
MEAN….60 NORMAL…..60
DEPARTURE FROM 30-YEAR NORMAL…………………… 0
TOTAL DEPARTURE FOR THE MONTH………………….+127 [+4.9 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………+75
TOTAL COOLING UNITS FOR THE SEASON…………797 DEPARTURE……..+204
TOTAL COOLING UNITS LAST SEASON TO DATE…….571 DIFFERENCE…….+226
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………5 DEPARTURE……….-1
TOTAL HEATING UNITS FOR THE MONTH…………..26 DEPARTURE………-54
TOTAL HEATING UNITS FOR THE SEASON………….27 DEPARTURE………-78
TOTAL HEATING UNITS LAST SEASON TO DATE……..89 DIFFERENCE……..-62
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….21 E AT 11:20 A.M.
ASOS……………………21 E AT 11:45 A.M.
DAVIS…………………..19 E AT 11:44 A.M. RMY 20
FASTEST MILE FOR YESTERDAY……………….. 14 ENE AT 10:47 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………16 ENE AT 10:47 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..14 E AT 10:47 A.M.
AVERAGE WIND SPEED AND DIRECTION…………. 9.3 E
ASOS…………………..9.4
DAVIS………………….8.3 ENE [070 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…..-1.97
ASOS……………1.33
TOTAL PRECIPITATION FOR THE YEAR………..31.60 DEPARTURE…..-6.73
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 66/53/60/0/0.00/…/.. 21 E RMY 20
9/26 low since midnight is 49F; normal low is now 51F
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 26
HIGH 91F IN 2007
LOW 36F IN 1905,1922,1978
PRECIP 3.84 INCHES IN 1888
PEAK GUST 54e MPH S IN 1977
RECORDS FOR SEPTEMBER 27
HIGH 84F IN 1998,2014
LOW 32F IN 1947
PRECIP 2.26 INCHES IN 1962
PEAK GUST 100 MPH SSE IN 1985 (HURRICANE GLORIA)
TODAY’S REPORT PREPARED BY: Robert Skilling
