Sunday, September 7, 2014

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, SEPTEMBER 7, 2014
ALL TIMES ARE IN EASTERN STANDARD TIME

STRONG STORMS MOVE OUT IN FRONT OF LAST
EVENING’S COLD FRONT- NUMEROUS REPORTS
OF DAMAGING WIND AND FREQUENT LIGHTNING

Once again most of yesterday’s severe weather
and precipitation managed to stay well away from
Blue Hill, only bringing a trace before midnight
yesterday, and 0.03 inches early this morning.
Our annual deficit for precipitation has now
surpassed -4.5 inches.

Yesterday’s peak gust of 33 MPH from the SW
appeared unremarkable when compared with near 60 MPH
gusts being produced from several storm cells to our
north.

This morning’s low of 62F, coupled with rising
pressure and dry conditions have produced significant
relief from yesterday’s heat and humidity. Yesterday’s
maximum of 90F represents only the 3 day of 90 or
above this summer, now with 2 days occurring in September.

Today’s Observations:

7 A.M.
Weather: Scattered opaque altocumulus, scattered altocumulus,
few cumulus distant W-SE
Temperature: 65F; Dew Point: 62F; Wind: NW at 7 kts,
Sea-level pressure: 30.03 ins. Hg, rising, then more quickly
Visibility: 65 miles, 50 mile NE-SE
6-hr max temp: 65F
6-hr min temp: 62F
24-hr precip: 0.03
BHO SA 1155 100 SCT 140 SCT 65 168/65/62/3207/003/
FEW CU DSNT W-SE VSBY NE-SE 50 MI/
8/170 53022 ASOS 60002 70002 MANUAL 70003 10065 20062

10 A.M.
Weather: Clear, few cumulus in all directions,
few cirrostratus distant E-SSW
Temperature: 72F; Dew Point: 51F; Wind: estimated NW at 11G18 kts,
Sea-level pressure: 30.08 ins. Hg, rising, then more slowly
Visibility: 80 miles
BHO SA 1455 CLR 80 186/72/51/E3211G18/008/
FEW CU ALQDS FEW CS DSNT E-SSW WND 30V35/ 8/105 51018

1 P.M.
Weather: Clear, few cumulus in all directions, few moderate
cumulus distant E-ESE, few cirrostratus distant E-S
Temperature: 76F; Dew Point: 46F; Wind: N at 7 kts,
Sea-level pressure: 30.09 ins. Hg, rising, then steady
Visibility: 80 miles, light distant haze ENE-ESE
6-hr max. temp: 77F
6-hr min. temp: 64F
BHO SA 1755 CLR 80 191/76/46/3607/009/
FEW CU ALQDS FEW MDT CU DSNT E-ESE FEW CS DSNT E-S
LGT DSNT HZ ENE-ESE/ 8/105 51005 10077 20064

WEATHER SUMMARY FOR SATURDAY, SEPTEMBER 6, 2014

TEMPERATURE (DEGREES F)
MAX…..90    NORMAL…..75
MIN…..67    NORMAL…..58
MEAN….79    NORMAL…..67

DEPARTURE FROM 30-YEAR NORMAL……………………+12
TOTAL DEPARTURE FOR THE MONTH……………………+62 [+10.1 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY………….14   DEPARTURE……….+11
TOTAL COOLING UNITS FOR THE MONTH………….76   DEPARTURE……….+55
TOTAL COOLING UNITS FOR THE SEASON………..555   DEPARTURE………..-3
TOTAL COOLING UNITS LAST SEASON TO DATE……663   DIFFERENCE……..-108

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………33 SSW AT  1:03 P.M.
ASOS…………………..36 SW  AT 12:49 P.M.
DAVIS………………….36 SSW AT  1:03 P.M. RMY 36
FASTEST MILE FOR YESTERDAY………………..29 SSW AT  1:59 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..29 SSW AT  2:00 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….28 SSW AT  2:00 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..15.0 SSW
ASOS…………………..14.7
DAVIS………………….13.9 SW [225 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.03  DEPARTURE……….-0.10
ASOS…………..0.02
TOTAL PRECIPITATION FOR SEPTEMBER……….0.03  DEPARTURE……….-0.68
ASOS…………..0.02
TOTAL PRECIPITATION FOR THE YEAR……….31.21  DEPARTURE……….-4.52
ASOS………….31.45

PRELIMINARY CLIMATE SUMMARY FOR AUGUST & 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

8/1  86/63/75/+3/0.00/598/69              25 S   RMY 29
8/2  68/59/64/-8/0.11/009/01              21 ESE RMY 22
8/3  71/60/66/-6/0.01/104/12              12 SE  RMY 12
8/4  83/64/74/+2/0.00/550/64              20 S   RMY 21
8/5  87/66/77/+5/0.00/798/93              17 S   RMY 19
8/6  79/64/72/0/0.07/462/54               23 WNW RMY 25
8/7  79/58/69/-3/T/589/69                 22 NW  RMY 24 TSTM
8/8  82/55/69/-3/0.00/817/96              20 WNW RMY 20
8/9  82/60/71/-1/0.00/730/86              16 WNW RMY 17
8/10 84/63/74/+3/0.00/770/91              15 W   RMY N/A
8/11 85/63/74/+3/0.00/667/79              25 S   RMY 29
8/12 81/64/73/+2/0.00/387/46              25 SSE RMY N/A
8/13 69/61/65/-6/1.09/000/00              35 ESE RMY 37
8/14 73/57/65/-6/0.00/828/99              27 W   RMY 29
8/15 74/56/65/-6/0.09/459/55              23 W   RMY 23 TSTM
8/16 76/56/66/-5/0.00/640/77              24 SW  RMY 27
8/17 78/60/69/-2/0.01/555/67              21 WNW RMY 23
8/18 77/56/67/-4/0.00/776/94              23 WNW RMY 25
8/19 78/54/66/-4/0.00/816/99              17 WNW RMY 17
8/20 78/58/68/-2/0.00/813/99              15 NE  RMY 15
8/21 76/58/67/-3/T/434/53                 16 ENE RMY 17
8/22 71/60/66/-4/0.07/057/07              17 NE  RMY 19
8/23 71/58/65/-5/0.00/618/76              22 ENE RMY 25
8/24 78/58/68/-2/0.00/811/100             16 ENE RMY N/A
8/25 85/63/74/+5/0.00/808/100             16 NW  RMY 17
8/26 89/62/70/+7/0.00/781/97              20 SSW RMY 23
8/27 89/64/77/+8/0.03/731/91              23 SW  RMY 25
8/28 80/59/70/+1/0.00/640/80              25 NW  RMY 28
8/29 73/54/64/-5/0.00/787/99              18 E   RMY 21
8/30 77/55/66/-2/0.00/723/91              23 S   RMY 28
8/31 83/63/73/+5/0.07/150/19              26 SSW RMY 31

9/1  88/69/79/+11/0.00/…/..             16 W   RMY 19
9/2  91/70/81/+13/0.00/…/..             24 S   RMY 27 TSTM
9/3  83/67/75/+8/0.00/…/..              24 NW  RMY 27
9/4  86/61/74/+7/0.00/…/,.              20 SW  RMY 22
9/5  89/66/78/+11/0.00/…/..             25 SSW RMY 29
9/6  90/67/79/+12/…./…/..             33 SSW RMY 36

9/7  morning low temp: 62F since midnight; normal low now 58F

DAILY RECORDS FOR SEPTEMBER 2014:
None so far.

DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):

RECORDS FOR SEPTEMBER 7
HIGH 90F IN 1971
LOW 45F IN 1906
PRECIP 1.37 INCHES IN 1907
PEAK GUST 46 MPH NW IN 1994

RECORDS FOR SEPTEMBER 8
HIGH 93F IN 2007
LOW 42F IN 1978
PRECIP 1.51 INCHES IN 2011
PEAK GUST 45 MPH S IN 2012

TODAY’S REPORT PREPARED BY: Brian Fitzgerald