Tuesday, January 28, 2014

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

DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, JANUARY 28, 2014
ALL TIMES ARE IN EASTERN STANDARD TIME

ANOTHER BLAST OF ARCTIC AIR DROPS TEMPERATURE SHARPLY
A FALL OF 36 DEGREES FROM 45F YESTERDAY MORNING TO 9F
DEGREES EARLY THIS MORNING…
SHOWERS LEAVE ONLY 0.02 INCH YESTERDAY…
NEW RECORD DAILY SNOWFALL RECORD HAS NOW BEEN CONFIRMED
TO HAVE BEEN SET AT 9.0 INS ON 21 JANUARY;
THE OLD RECORD WAS 7.6 INS. 2011

The arrival of a new Arctic air mass late yesterday and
last night resulted in a 36-degree temperature drop in
less than 24 hours.  A maximum of 45F was recorded around
10 A.M. Monday with the temperature dropping to 23 degrees
early last evening then on down to 17 degrees by midnight
finally bottoming out at 9 degrees this morning.

A new daily snowfall record has been confirmed for 21 January
at 9.0 inches.

Today’s Observations:

7 A.M.
Weather: Scattered altocumulus/altocumulus lenticularis, and
scattered cirrus, cumulus/stratocumulus layer along and offshore
NE-ESE, distant layer of altostratus, cirrostratus extending from
E-SSW
Temperature: 9F; Dew Point: -8F; Wind: WNW at 13G22 kts,
Wind: Peak wind from W at 28 kts @ 6:10 A.M.,
Wind: Direction variable WSW-NW
Sea-level pressure: 30.20 ins. Hg, increasing then more rapidly
Visibility: 60 miles, light distant haze
6-hr. min temp: 9F
24-hr. precip; 0.02 in.
24-hr. snowfall: none
Total snow depth on ground: 2 inches
BHO SA 1155 180 SCT 220 SCT 250 SCT 60 226/9/-8/2913G22/020/
CU/SC ALG/OFFSHR NE-ESE AS/AC LYR XTDNG E-SSW PTCHS ACSL ALQDS
PK WND 2828/10/ WND 25V31/ 8/871 4/002 53036 ASOS 70003
MANUAL 70002 10016 20009

10 A.M.
Weather: Scattered cirrus (2 levels), cumulus offshore distant
ENE-ESE, few cirrocumulus
Temperature: 13F Dew Point: -9F; Wind: WNW at 14G23 kts,
Wind: Peak wind from W at 27 kts at 9:03 A.M.
Wind: Direction variable W-NNW
Sea-level pressure: 30.27 ins. Hg, increasing then more slowly
Visibility: 75 miles, light distant haze
BHO SA 1455 220 SCT 250 SCT 75 252/13/-9/2914G23/027/ CU OFFSHR
DSNT ENE-ESE FEW CC LGT DSNT HZ WND 26V32 PK WND 2727/03/
8/801 51026

1 P.M.
Weather: Scattered cirrocumulus lenticularis, scattered cirrus
radiatus and fibratus
Temperature: 17F; Dew Point: -8F; Wind: NW at 11 kts,
Wind: Direction variable W-NW
Sea-level pressure: 30.23 ins. Hg, decreasing
Visibility: 70 miles, light distant haze
6-hr max. temp: 17F
6-hr min. temp: 9F
BHO SA 1755 220 SCT 250 –SCT 70 238/17/-8/3111/023/ CI RADIATUS
ALQDS LWR CCSL SE-SW LGT DSNT HZ WND 26V32/ 8/009 58014 10017
20009

WEATHER SUMMARY FOR MONDAY, JANUARY 27, 2014

TEMPERATURE (DEGREES F)
MAX…..45    NORMAL…..34
MIN…..17    NORMAL…..17
MEAN….31    NORMAL…..25

DEPARTURE FROM 30-YEAR NORMAL……………………+6
TOTAL DEPARTURE FOR THE MONTH……………………+8 [+0.1 DEGREE/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..34  DEPARTURE……….-6
TOTAL HEATING UNITS FOR THE MONTH…………1061  DEPARTURE……….-7
TOTAL HEATING UNITS FOR THE SEASON………..3338  DEPARTURE………-35
TOTAL HEATING UNITS LAST SEASON TO DATE……3008  DIFFERENCE…….+330

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………46 S   AT  9:25 A.M. *
AERO…………………..46 S   AT  9:13 A.M.
ASOS…………………..48 S   AT  8:53 A.M.
DAVIS………………….46 S   AT  8:18 A.M. RMY 49
FASTEST MILE FOR YESTERDAY………………..34 S   AT  9:15 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..35 S   AT  9:15 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….33 S   AT  9:27 A.M.
AVERAGE WIND SPEED AND DIRECTION…………20.2 S
ASOS…………………19.7
DAVIS………………..18.1 SW [225 deg.] * last of several occurrences…

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.02  DEPARTURE………….-0.11
ASOS…………..0.03
TOTAL PRECIPITATION FOR THE MONTH……….4.61  DEPARTURE………….+0.80
ASOS…………..4.92
TOTAL PRECIPITATION FOR THE YEAR………..4.61  DEPARTURE………….+0.80
ASOS…………..4.92

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……..0.0    DEPARTURE…………..-0.6
TOTAL SNOWFALL FOR THE MONTH………….32.9    DEPARTURE………….+17.9
TOTAL SNOWFALL FOR THE SEASON…………48.6    DEPARTURE………….+17.6

PRELIMINARY CLIMATE SUMMARY FOR JANUARY 2014 CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST
AERO: Aerovane wind recording system gust
RMY:  RMY = R.M. Young wind gust recording system added 8/9/2011
TSTM: Thunderstorm day (thunder heard some time during day)
….: Data not yet available, records not finalized

1/1  26/16/21/-6/0.00/0.0/505/92          25 W   AERO 25 MPH W   RMY 27
1/2  24/00/12/-15/0.97/10.9/000/00        39 NNE AERO 39 MPH NNE RMY 39
1/3  12/-3/05/-21/0.38/4.7/270/49         36 N   AERO 39 MPH N   RMY 34
1/4  25/-4/11/-15/0.00/0.0/545/99         35 SSW AERO 37 MPH SSW RMY 38
1/5  42/23/33/+07/0.08/0.0/259 47         30 SE  AERO 32 MPH SE  RMY 42
1/6  57/25/41/+15/0.29/0.0/006/01         41 S   AERO 46 MPH S   RMY 48
1/7  25/06/16/-10/0.00/0.0/555/100        44 WNW AERO 46 MPH WNW RMY 42
1/8  21/3/12/-14/0.00/0.0/550/99          28 WSW AERO 29 MPH WSW RMY N/A
1/9  28/13/21/-5/0.00/0.0/540/97          23 WNW AERO 24 MPH WNW RMY 27
1/10 37/17/27/+2/0.05/0.3/000/00          17 SSW AERO 18 MPH SW  RMY N/A
1/11 57/37/47/+22/0.67/0.0/000/00         50 S   AERO 59 MPH S   RMY 59
1/12 51/32/42/+17/0.04/0.0/292/52         41 W   AERO 44 MPH W   RMY 42
1/13 50/30/40/+15/0.00/0.0/473/84         33 S   AERO 36 MPH S   RMY 37
1/14 49/41/45/+20/0.83/0.0/000/00         35 S   AERO 37 MPH S   RMY 32
1/15 46/33/40/+15/0.00/0.0/374/66         24 W   AERO 23 MPH W   RMY N/A
1/16 40/34/37/+12/0.00/0.0/000/00         14 ENE AERO 13 MPH ENE RMY 14
1/17 44/33/39/+14/0.00/0.0/541/95         21 SW  AERO 21 MPH SW  RMY 22
1/18 37/30/34/+9/0.82/4.2/000/00          18 E   AERO 17 MPH E   RMY 18
1/19 32/27/30/+5/0.03/0.5/…/..          28 SW  AERO 35 MPH SW  RMY 34
1/20 39/23/31/+6/0.00/0.0/023/04          38 W   AERO 41 MPH W   RMY 42
1/21 23/8/16/-9/0.30/9.0/006/01           29 WNW AERO 30 MPH WNW RMY 32
1/22 15/3/9/-16/0.12/3.1/237/41           36 N   AERO 35 MPH N   RMY 34
1/23 20/-1/10/-15/0.00/0.0/…/..         30 W   AERO 29 MPH W   RMY 30
1/24 16/2/9/-16/0.00/0.0/…/..           28 WNW AERO 25 MPH WNW RMY N/A
1/25 36/12/24/-1/0.01/0.2/…/..          60 SSW AERO 66 MPH SSW RMY 64
1/26 22/12/17/-8/0.00/0.0/…/..          45 W   AERO 43 MPH W   RMY 41
1/27 45/17/31/+6/0.02/0.0/…/..          46 S   AERO 46 MPH S   RMY 49

1/28 morning low temp: 9F; the normal low is now 17F

DAILY RECORDS FOR JANUARY 2014
1/21 – New record daily snowfall of 9.0 ins.; this surpasses
7.6 ins. in 2011.

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

ECORDS FOR JANUARY 28
HIGH 59F IN 1916
LOW -9F IN 1888, 1924
PRECIP 2.18 INS. IN 1897
SNOWFALL 15.0 INS. IN 1897
PEAK GUST 78e MPH SSE IN 1977

RECORDS FOR JANUARY 29
HIGH 66F IN 2002
LOW -11F IN 1888
PRECIP 1.48 INS. IN 1973
SNOWFALL 8.0 INS. IN 1943
PEAK GUST 72 MPH NW IN 1973

TODAY’S REPORT PREPARED BY: Robert Skilling