Friday, January 23, 2015

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

DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, JANUARY 23, 2015
ALL TIMES ARE IN EASTERN STANDARD TIME

FULL SUNSHINE TODAY PRETTY MUCH FROM SUNRISE
TEMPERATURES RISE FROM 18F TO MID-30’S
SNOWFALL LAST YEAR THROUGH THIS DATE 48 INCHES!

Just a few distant clouds have been observed today
but visibility is restricted by some distant haze
to 35 to 45 miles.  Temperatures rose steadily from
the upper teens to the mid-30’s.
A check of our records shows a seasonal snowfall total
of 48 inches through this date last year as compared to
only 16 inches this year.  Normal through this date
in the season is about 28 inches.

Today’s Observations:

7 A.M.
Weather: Clear, bank of stratocumulus clouds along and offshore
NNE-ESE, few stratocumulus distant ESE
Temperature: 18F; Dew Point: 10F; Wind: WNW at 8 kts
Sea-level pressure: 30.26 ins. Hg, rising then more slowly
Visibility: 20 miles, hazy, lower at 15 miles NE-SE,
6-hr max temp: 25F
6-hr min temp: 18F
24-hr precip: none
BHO SA 1155 CLR 30 248/18/10/2908/026/ SC CLD BNK ALG/OFFSHR
DSNT NNE-ESE FEW SC DSNT ESE FEW CI N-ENE HAZY/ 8/501 51010
10025 20018

10 A.M.
Weather: Clear, few altocumulus/altocumulus lenticularis
distant NNW-NNE, dark smoke layer WSW-WNW
Temperature: 26F; Dew Point: 10F; Wind: WSW at 6 kts
Sea-level pressure: 30.26 ins. Hg, falling slightly
Visibility: 40 miles, except 35 miles W dark smoke layer
WSW-WNW, visibility NE 45 miles
BHO SA 1455 CLR 40 246/26/10/2406/026/ FEW AC/ACSL DSNT NNW-NNE
DRK K LYR ALG/ABV HRZN WSW-WNW VSBY W 35 NE 45 DSNT HZ/
8/040 58002

1 P.M.
Weather:  Clear, few small cumulus fractus/cumulus distant WNW
Temperature: 33F; Dew Point: 14F; Wind: WSW at 8 kts,
Wind: Direction variable SSW-WNW
Sea-level pressure: 30.15 ins. Hg, falling, then more rapidly
Visibility: 40 miles, thin smoke layer along and above horizon
WNW-N-NE, W-NW 35 miles, NE 45 miles, light distant haze
6-hr max temp: 34F
6-hr min temp: 18F
BHO SA 1755 CLR 40 211/33/14/2408/015/ FEW SML CUFRA/CU DSNT WNW
THN K LYR ALG/ABV HRZN WNW-N-NE VSBY W-NW 35 HAZY WND 21V29/
8/100 58035 10034 20018

SUMMARY FOR THURSDAY, JANUARY 22, 2015

TEMPERATURE (DEGREES F)
MAX…..36   NORMAL…..34
MIN…..25   NORMAL…..17
MEAN….31   NORMAL…..25

DEPARTURE FROM 30-YEAR NORMAL……………………..+6
TOTAL DEPARTURE FOR THE MONTH…………………….-24 [-1.3 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..34  DEPARTURE………..-6
TOTAL HEATING UNITS FOR THE MONTH………….893  DEPARTURE……….+24
TOTAL HEATING UNITS FOR THE SEASON………..2953  DEPARTURE………-220
TOTAL HEATING UNITS LAST SEASON TO DATE……3104  DIFFERENCE……..-151

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………20 WNW   AT 10:12 P.M.
ASOS…………………..21 WNW   AT 10:12 P.M.
DAVIS………………….19 W     AT  9:56 P.M. RMY 20
FASTEST MILE FOR YESTERDAY………………..13 NW    AT 11:03 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..14 NW    AT 10:55 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….13 WNW   AT  9:11 P.M.
AVERAGE WIND SPEED AND DIRECTION………… 8.2 NNW
ASOS………………….8.4
DAVIS…………………7.0 NNW [330 degrees] * last of several occurrences…

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE…..-0.14
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….1.74  DEPARTURE…..-1.38
ASOS…………..1.82
TOTAL PRECIPITATION FOR THE YEAR………..1.74  DEPARTURE…..-1.38
ASOS…………..1.82

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M………,0.0  DEPARTURE……-0.6
TOTAL SNOWFALL FOR THE MONTH…………….4.9  DEPARTURE……-7.4
TOTAL SNOWFALL FOR THE SEASON…………..15.9  DEPARTURE…..-12.4

PRELIMINARY CLIMATE SUMMARY FOR JANUARY CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOWFALL/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

1/1  31/18/25/-2/0.00/0.0/544/99              29 SSW RMY 30
1/2  37/26/32/+5/0.00/0.0/314/57              35 WSW RMY 38
1/3  34/21/28/+2/0.67/2.5/017/03              25 SE  RMY 26
1/4  51/33/42/+16/0.48/0.0/000/00             30 SSW RMY N/A
1/5  46/13/30/+4/0.00/0.0/542/98              48 W   RMY 54
1/6  15/10/13/-13/0.02/0.4/000/00             29 W   RMY N/A
1/7  22/01/12/-14/0.01/0.3/383/69             43 WNW RMY 47
1/8  16/-5/6/-20/0.00/0.0/539/97              39 WNW RMY N/A
1/9  27/16/22/-4/0.08/0.9/201/36              35 WSW RMY 38
1/10 22/11/17/-8/0.00/0.0/541/97              26 WNW RMY 27
1/11 31/9/20/-5/45/0.00/0.0/123/22            26 SSW RMY N/A
1/12 36/31/34/+9/0.23/T/000/00                29 NNW RMY N/A
1/13 33/11/22/-3/0.00/0.0/524/93              30 NNW RMY 29
1/14 22/11/17/-8/T/T/000/00                   18 NNW RMY 16
1/15 27/20/24/-1/0.09/0.8/000/00              20 WSW RMY 22
1/16 35/12/24/-1/T/T/341/60                   46 WSW RMY 50
1/17 21/5/13/-12/0.00/0.0/558/98              30 WNW RMY N/A
1/18 50/19/35/+10/0.16/0.0/000/00             47 SE  RMY 52
1/19 44/28/36/+11/T/0.0/304/53                33 W   RMY 36
1/20 36/23/30/+5/0.00/0.0/495/86              28 W   RMY 28
1/21 30/17/24/-1/0.00/0.0/358/62              21 WNW RMY N/A
1/22 36/25/31/+6/T/T/…/..     20 WNW RMY 20

1/23 morning low temp: 18F since midnight; normal low is now 17F

DAILY RECORDS FOR JANUARY 2015
None so far.

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

RECORDS FOR JANUARY 23
HIGH 62F IN 1906
LOW -10F IN 1976
PRECIP 2.40 INS. IN 1935
SNOWFALL 14.6 INS. IN 1966
PEAK GUST 85 MPH S IN 1992

RECORDS FOR JANUARY 24
HIGH 60F IN 1967
LOW -12F IN 1907
PRECIP 2.04 INS. IN 1998
SNOWFALL 11.3 INS. IN 1935
PEAK GUST 82 MPH S IN 1996

TODAY’S REPORT PREPARED BY: Robert Skilling