Monday, January 25, 2016

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

DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, JANUARY 25, 2016
ALL TIMES ARE IN EASTERN STANDARD TIME

CLEAR AND COLD START GIVES WAY TO WARM UP

With 6 inches of snowfall still on the ground, the sun came out
this morning and has slowly been warming things up since the 7
AM observation after an overnight low of 20F.

Few clouds could be seen all day with some cirrostratus moving in
by the 1 o’clock observation.  Temperatures had warmed up into the
mid 30’s and a warm up is expected for the next few days.

Today’s Observations:

7 A.M.
Weather: Clear, Few cumulus distant N-NE
Temperature: 21F; Dew Point: 15F; Wind: NW at 7 kts,
Sea-level pressure: 30.17 ins. Hg, steady, then rising
Visibility: 50 miles
6-hr Max temp: 26F
6-hr Min temp: 20F
24-hr precip: Trace
24-hr snowfall: Trace
Snow depth: 6 ins.
BHO SA 1155 CLR 50 217/21/15/3007/017/ FEW CU DSNT N-NE LGT DSNT HZ/
8/100 4/006 53026 10026 20020

10 A.M.
Weather: Clear, few stratocumulus distant SW few cirrus distant E-SE
Temperature: 29F; Dew Point: 26F; Wind: N at 8 kts,
Sea-level pressure: 30.25 ins. Hg, rising, then more slowly
Visibility: 60 miles
BHO SA 1455 CLR 60 245/29/26/3108/025/ FEW SC DSNT SW LGT DSNT HZ/
8/500 53028

1 P.M.
Weather: Scattered Ccrrostratus
Temperature: 35F; Dew Point: 23F; Wind: Calm
Sea-level pressure: 30.24 ins. Hg, rising then falling
Visibility: 60 miles
6-hr Max temp: 35F
6-hr Min temp: 20F
6-hr precip: 0.00 ins.
6-hr snowfall: 0.0 ins.
BHO SA 1755 250 SCT 60 242/35/23/0000/024/ WND LGT LGT DSNT HZ/
8/005 58003 10035 20021

SUMMARY FOR SUNDAY, JANUARY 24, 2016

TEMPERATURE (DEGREES F)
MAX…..33   NORMAL…..34
MIN…..14   NORMAL…..17
MEAN….24   NORMAL…..25

DEPARTURE FROM 30-YEAR NORMAL……………………-1
TOTAL DEPARTURE FOR THE MONTH…………………..+68 [+2.7 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..41   DEPARTURE……….+1
TOTAL HEATING UNITS FOR THE MONTH………….881   DEPARTURE………-68
TOTAL HEATING UNITS FOR THE SEASON………..2537   DEPARTURE……..-716
TOTAL HEATING UNITS LAST SEASON TO DATE……3026   DIFFERENCE…….-489

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….34  N    AT   12:52 A.M.
ASOS……………………36  N    AT   12:16 A.M.
DAVIS…………………..34  N    AT   12:08 A.M. RMY 29
FASTEST MILE FOR YESTERDAY…………………25  N    AT    1:39 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………25  N    AT   12:05 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..24  N    AT   12:05 A.M.
AVERAGE WIND SPEED AND DIRECTION…………..12.6 N
ASOS…………………..12.3
DAVIS………………….10.9 N [005 Deg.]

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……….3.77  DEPARTURE……+0.37
ASOS…………..3.94
TOTAL PRECIPITATION FOR THE YEAR………..3.77  DEPARTURE……+0.37
ASOS…………..3.94

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0  DEPARTURE…….-0.5
TOTAL SNOWFALL FOR THE MONTH……………14.3  DEPARTURE…….+1.0
TOTAL SNOWFALL FOR THE SEASON…………..15.6  DEPARTURE……-13.7

PRELIMINARY CLIMATE SUMMARY FOR JANUARY CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/ AERO/RMY GUST
AERO: Aerovane wind recording system 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   37/29/33/+6/0.00/0.0/005/01           29 W               RMY 29
1/2   37/27/32/+5/0.00/0.0/461/84           31 W               RMY N/A
1/3   41/27/34/+8/0.00/0.0/501/91           28 W               RMY 29
1/4   30/10/20/-6/T/T/000/00                29 NNW             RMY 29
1/5   23/4/14/-12/0.00/0.0/552/100          28 NNW             RMY N/A
1/6   43/17/30/+4/0.00/0.0/553/100          24 SW              RMY 24
1/7   43/25/34/+8/0.00/0.0/521/94           21 SW              RMY N/A
1/8   40/28/34/+8/T/0.0/000/00              28 E   AERO 25 ENE RMY 25
1/9   39/36/38/+12/T/0.0/000/00             21 ENE AERO 20 ENE RMY N/A
1/10  58/38/48/+23/1.55/0.0/000/00          53 SSE AERO 55 SSE RMY 53
1/11  48/21/35/+10/0.00/0.0/559/100         43 W   AERO 45 WSW RMY N/A
1/12  35/19/27/+2/…./…/359/64           30 SE  AERO N/A    RMY N/A
1/13  30/17/24/-1/…./…/551/98           50 W   AERO 58 W   RMY 54
1/14  28/17/23/-2/T/T/…/..                26 W   AERO N/A    RMY 25
1/15  40/23/32/+7/0.00/0.0/…/..           26 ESE AERO 25 ESE RMY 23
1/16  41/32/37/+12/1.03/T/…/..            32 NNW AERO 32 NNW RMY 28
1/17  33/26/30/+5/…./…/…/..           29 WNW AERO 28 WNW RMY N/A
1/18  26/15/21/-4/…./…/…/..           50 W   AERO 50 W   RMY 47
1/19  22/13/18/-7/0.00/0.0/…/..           55 WNW AERO 59 W   RMY 55
1/20  30/15/23/-2/0.00/0.0/…/..           46 WNW AERO 47 WNW RMY 45
1/21  30/15/23/-2/0.00/0.0/…/..           38 WNW AERO 38 NW  RMY 35
1/22  28/14/21/-4/0.00/0.0/…/..           32 NW  AERO 32 NW  RMY N/A
1/23  30/18/24/-1/0.74/7.1/000/00           54 NE  AERO 56 NE  RMY 50
1/24  33/14/24/-1/T/T/…/..                34 N   AERO 37 N   RMY 29

1/25 low since midnight is 20F; normal low is now 17F

DAILY RECORDS FOR JANUARY 2016

**1/10/16: NEW DAILY RECORD MAXIMUM TEMPERATURE OF 58F, BREAKS
PREVIOUS RECORD OF 54F SET BACK IN 2000**

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

RECORDS FOR JANUARY 25
HIGH 56F IN 2010
LOW -10F IN 1935
PRECIP 2.24 INS. IN 1979
SNOWFALL 12.5 INS. IN 1941
PEAK GUST 81 MPH WNW IN 1972

RECORDS FOR JANUARY 26
HIGH 68F IN 1950 [RECORD FOR MONTH] LOW -5F IN 1920
PRECIP 1.60 INS. IN 1958
SNOW 9.0 INS. IN 1898
WIND 90e MPH SE IN 1978

TODAY’S REPORT PREPARED BY: Robert Millette