Monday, October 26, 2015

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

DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, OCTOBER 26, 2015
ALL TIMES ARE IN EASTERN STANDARD TIME

LIGHT RAIN YESTERDAY DOES LITTLE TO IMPROVE
PRECIPITATION DEFICIT AT BLUE HILL

0.04 inches of new rain yesterday was not enough
to overcome the daily average precipitation of 0.16
inches normal for that date. This daily deficit deepens
the monthly deficit to now 2.64 inches below normal through
yesterday, which is now 7.58 inches below normal for
the year.

Clear skies and rising pressure overnight brought in
cold air, dropping temperatures to 38F this morning.
Excellent visibility has been observed throughout the
morning, with 80 miles visible in all directions. By the
1:00 PM EST observation skies were still mostly clear
with visibility of 75 miles. A maximum temperature of
53F had been reached.
Today’s Observations:

7 A.M.
Weather: Clear, few stratocumulus distant offshore NE-SE,
few cirrus distant E-SW, few cumulus distant WNW
Temperature: 39F; Dew Point: 32F; Wind: NNW at 12 kts,
Sea-level pressure: 30.36 ins. Hg, rising, then more slowly
Visibility: 80 miles
6-hr Max temp: 43F
6-hr Min temp: 38F
24-hr precip: 0.03 in.
BHO SA 1155 CLR 80 282/39/32/3312/036/ FEW SC DSNT OFFSHR NE-SE
FEW CI DSNT E-SW FEW CU DSNT WNW/ 8/501 51021 ASOS 70004 MANUAL
70003 10043 20038

10 A.M.
Weather: Clear, few stratocumulus distant offshore ENE-SE,
few cirrus distant E-SW, few small cumulus WSW-NNE
Temperature: 50F; Dew Point 32F; Wind: NNW at 7 kts
Wind Direction: NW varying N
Sea-level pressure: 30.42 ins. Hg, rising, then steady
Visibility: 75 miles
BHO SA 1455 CLR 75 302/50/32/3407/042/ FEW SC DSNT OFFSHR ENE-SE
FEW CI DSNT E-SW FEW SML CU WSW-NNE WND 31V36/ 8/101 51020

1 P.M.
Weather: Clear, few cumulus distant NNE and E-S,
few cirrus distant NE-SW
Temperature: 52F; Dew Point 30F; Wind: estimated N at 5 kts
Wind Speed and Direction: Light and Variable
Sea-level pressure: 30.41 ins. Hg, steady, then falling
Visibility: 75 miles
6-hr max temp: 53F
6-hr min temp: 39F
BHO SA 1755 CLR 75 297/52/30/E1005/041/ FEW CU DSNT NNE AND E-S
FEW CI DSNT NE-SW WND LGT AND VRB/ 8/101 58005 10053 20039
SUMMARY FOR SUNDAY, OCTOBER 25, 2015

TEMPERATURE (DEGREES F)
MAX…..59   NORMAL…..57
MIN…..44   NORMAL…..40
MEAN….52   NORMAL…..49

DEPARTURE FROM 30-YEAR NORMAL…………………..+3
TOTAL DEPARTURE FOR THE MONTH………………….-12  [-0.7 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………0   DEPARTURE………..0
TOTAL COOLING UNITS FOR THE MONTH……………0   DEPARTURE……….-5
TOTAL COOLING UNITS FOR THE SEASON…………810   DEPARTURE……..+208
TOTAL COOLING UNITS LAST SEASON TO DATE…….595   DIFFERENCE…….+215

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..13   DEPARTURE……….+9
TOTAL HEATING UNITS FOR THE MONTH………….321   DEPARTURE……….+5
TOTAL HEATING UNITS FOR THE SEASON…………364   DEPARTURE………-94
TOTAL HEATING UNITS LAST SEASON TO DATE…….350   DIFFERENCE……..+14

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….29  NW  AT  4:32 P.M.
ASOS……………………32  NNW AT 11:14 P.M.
DAVIS…………………..28  S   AT  6:45 A.M. RMY 31
FASTEST MILE FOR YESTERDAY…………………23  SSW AT  9:13 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………23  SSW AT  9:15 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..22  SSW AT  8:15 A.M.
AVERAGE WIND SPEED AND DIRECTION……………15.2 S
ASOS………………….. 14.8
DAVIS…………………. 13.3 SW [234 Deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…..0.03  DEPARTURE…..-0.12
ASOS……………0.03
TOTAL PRECIPITATION FOR THE MONTH………..1.11  DEPARTURE…..-2.64
ASOS……………1.09
TOTAL PRECIPITATION FOR THE YEAR………..35.25  DEPARTURE…..-7.58
ASOS…………….N/A ***
*** ASOS annual total not available due to erroneous readings

PRELIMINARY CLIMATE SUMMARY FOR OCTOBER 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

10/1  55/51/53/-4/…./000/00               39 NE  RMY N/A
10/2  51/47/49/-8/…./000/00               40 NE  RMY 43
10/3  51/45/48/-8/…./000/00               38 NE  RMY N/A
10/4  55/49/52/-4/0.00/474/68               35 E   RMY 40
10/5  59/46/53/-3/T/125/18                  21 NE  RMY 20
10/6  68/43/56/+1/0.00/663/96               17 NW  RMY 17
10/7  69/46/58/+3/0.00/640/93               20 W   RMY 20
10/8  63/49/56/+2/0.00/678/99               21 S   RMY N/A
10/9  68/50/59/+5/0.27/130/19               45 S   RMY 49
10/10 59/44/53/-2/0.00/673/99               33 NNW RMY N/A
10/11 67/46/57/+4/0.00/582/86               26 SW  RMY 28
10/12 76/50/63/+10/0.00/647/96              22 SSW RMY 24
10/13 70/55/63/+10/0.27/208/31              23 S   RMY 24
10/14 66/46/56/+4/0.00/428/64               26 W   RMY 29
10/15 60/41/51/-1/0.00/659/99               20 SW  RMY 27
10/16 60/44/52/+1/T/471/71                  31 W   RMY 34
10/17 54/35/45/-6/T/482/73                  30 WNW RMY 33
10/18 45/28/37/-14/0.00/480/73              24 NNW RMY 25
10/19 47/26/37/-13/0.00/648/99              25 SSW RMY 30
10/20 65/43/54/+4/0.00/…/..               28 SW  RMY 28
10/21 59/51/55/+5/0.01/…/..               18 SSE RMY 21
10/22 71/51/61/+12/T/…/..                 31 W   RMY 34
10/23 55/34/45/-4/0.00/…/..               31 NNW RMY 34
10/24 46/33/40/-9/0.00/…/..               15 SSE RMY N/A
10/25 59/44/52/+3/0.04/…/..               29 N   RMY 31

10/26 low since midnight is 38F; normal low is now 39F

DAILY RECORDS FOR OCTOBER 2015

-NONE SO FAR.

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

RECORDS FOR OCTOBER 26
HIGH 80F IN 1963
LOW 24F IN 1933
PRECIP 1.72 INCHES IN 1894
SNOW 3.0 INCHES IN 1962
WIND 59 MPH SSE IN 1967

RECORDS FOR OCTOBER 27
HIGH 83F IN 1963
LOW 21F IN 1936
PRE 1.79 INCHES IN 1886
SNOW 2.5 INCHES IN 2011
WIND 54 MPH WNW IN 1968

TODAY’S REPORT PREPARED BY: Brian Fitzgerald