Friday, September 5, 2014

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

DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, SEPTEMBER 5, 2014
ALL TIMES ARE IN EASTERN STANDARD TIME

EARLY SEPTEMBER HEAT CONTINUES
ALONG WITH VERY DRY CONDITIONS

The temperature was approaching the 90-degree
mark early this afternoon along with full
bright sunshine.  The humidity is back with the
dew point in the middle 60’s.

AUGUST 2014 PRELIMINARY STATS

TEMPERATURE [deg. F]

Av. Max. 78.8
Av. Min. 59.7
Mean     69.3 [-1.2] 24-hour corr. mean: 68.6
Max. temp. for month: 89 on 26th and 27th
Min. temp. for month: 54 on 19th and 29th
Total heating degree day units: 2    [-14] Total cooling degree day units: 142  [-44] Total seasonal cooling   units: 479  [-58] Season [1/1 thru 8/31]

PRECIPITATION [ins.]

Total: 1.55 [-2.48] Greatest one calendar day: 1.09 [13th] Greatest in 24 hours 1.09 [13th]

WIND
Av. wind speed:       9.4  MPH
Av. corr. wind speed: 10.1 MPH
Prevailing direction: S @ 14% *
* ERROR CORRECTED: was SSW is corrected to S

SUNSHINE
Total astronomical minutes: 17,910 of a possible 25,751, of 70%
Total Campbell Stokes card minutes: 17,238 of a possible 24,780 or 70%

Today’s Observations:

7 A.M.
Weather: Clear, few cirrus distant NW-NNW, fog layer distant SSE-SSW
Temperature: 70F; Dew Point: 64F; Wind: SSW at 9 kts,
Sea-level pressure: 30.16 ins. Hg, increasing, then more slowly
Visibility: 15 miles, except 20 miles WNW, thin fog/hazy
6-hr max temp: 70F
6-hr min temp: 66F
24-hr precip: 0.00
BHO SA 1155 CLR 15 214/70/64/2009/016/ FEW CI DSNT NW-NNW
FG LYR DSNT SSE-SSW THN F/HAZY ALQDS/ 8/001 51003 10070 20066

10 A.M.
Weather: Clear and hazy, few cirrus distant N
Temperature: 82F; Dew Point: 66F; Wind: S at 8 kts,
Sea-level pressure: 30.16 ins. Hg, steady
Visibility: 25 miles, hazy
BHO SA 1455 CLR 25 215/82/66/1908/016/ FEW CI N HAZY/
8/001 50001

1 P.M.
Weather: Scattered cumulus, few moderate cumulus, hazy
Temperature: 88F; Dew Point: 66F; Wind: SW at 13 kts,
Wind: Gust to 20 kts past hour
Sea-level pressure: 30.09 ins. Hg, falling, then more quickly
Visibility: 30 miles, hazy
6-hr max. temp: 89F
6-hr min. temp: 70F
BHO SA 1755 45 SCT 30 190/88/66/2213/009/ FEW MDT CU HAZY GST 20 KTS
PST HR/ 8/200 56025 10089 20070

WEATHER SUMMARY FOR THURSDAY, SEPTEMBER 4, 2014

TEMPERATURE (DEGREES F)
MAX…..86    NORMAL…..76
MIN…..61    NORMAL…..59
MEAN….74    NORMAL…..67

DEPARTURE FROM 30-YEAR NORMAL…………………….+7
TOTAL DEPARTURE FOR THE MONTH……………………+39 [+9.6 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………..9   DEPARTURE………..+5
TOTAL COOLING UNITS FOR THE MONTH………….49   DEPARTURE……….+34
TOTAL COOLING UNITS FOR THE SEASON………..528   DEPARTURE……….-24
TOTAL COOLING UNITS LAST SEASON TO DATE……663   DIFFERENCE……..-135

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………20 SW  AT  6:27 P.M.
ASOS…………………..21 SW  AT  6:27 P.M.
DAVIS………………….21 SW  AT  6:27 P.M. RMY 22
FASTEST MILE FOR YESTERDAY………………..14 SSW AT  8:40 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..15 SSW AT  8:42 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….14 SSW AT  8:37 P.M.
AVERAGE WIND SPEED AND DIRECTION……………8.8 WNW
ASOS……………………9.4
DAVIS…………………..7.8 W [260 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE……….-0.12
ASOS…………..0.00
TOTAL PRECIPITATION FOR SEPTEMBER……….0.00  DEPARTURE……….-0.46
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE YEAR……….31.18  DEPARTURE……….-4.30
ASOS………….31.43

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  morning low temp: 66F; normal low now 58F

DAILY RECORDS FOR AUGUST 2014:
None so far.

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 5
HIGH 90F IN 1971
LOW 45F IN 1906
PRECIP 1.37 INCHES IN 1907
PEAK GUST 46 MPH NW IN 1994

TODAY’S REPORT PREPARED BY: Robert Skilling/Brian Fitzgerald