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

DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, JANUARY 22, 2016 
ALL TIMES ARE IN EASTERN STANDARD TIME

ONE LAST DAY OF SEASONALLY COLD TEMPS AND SUNSHINE
AHEAD OF APPROACHING STORM

Clear skies overnight and a steady northwesterly breeze allowed 
temperatures to drop to a chilly 14F this morning. Clear skies and
cold conditions have continued through this morning as well, with
thin cirrostratus overspreading the skies by this afternoon's 1:00 PM
EST observation. Temperatures had climbed through the 20s and had
reached a maximum reading of 28F.


Today's Observations:

7 A.M.
Weather: Clear, few stratocumulus distant NE-SE and S
Temperature: 15F; Dew Point: 5F; Wind: NW at 10 kts
Sea-level pressure: 30.16 ins. Hg, rising, then more quickly
Visibility: 75 miles
6-hr Max temp: 16F 
6-hr Min temp: 14F
24-hr precip: 0.00 ins.
24-hr snowfall: 0.0 ins.
Snow depth: 3 ins.
BHO SA 1155 CLR 75 214/15/5/3210/016/ FEW SC DSNT OFFSHR NE-SE AND S/ 
8/500 4/003 53003 10016 20014

10 A.M.
Weather: Clear, few stratocumulus distant offshore ENE-SE,
few cirrus distant N and SE-WSW
Temperature: 23F; Dew Point: 8F; Wind: NNW at 13G22 kts,
Sea-level pressure: 30.22 ins. Hg, rising, then falling but higher still
Visibility: 80 miles
BHO SA 1455 CLR 80 233/23/8/3313G22/022/ FEW SC DSNT OFFSHR ENE-SE 
FEW CI DSNT N AND SE-WSW/ 8/501 50019

1 P.M.
Weather: Broken cirrostratus, few stratocumulus distant 
offshore ESE-SE
Temperature: 28F; Dew Point: 9F; Wind: NW at 9 kts,
Sea-level pressure: 30.20 ins. Hg, falling, then rising, but lower still
Visibility: 80 miles
6-hr Max temp: 28F
6-hr Min temp: 14F
BHO SA 1755 E300 BKN 80 226/28/9/3109/020/ FEW SC DSNT OFFSHR ESE-SE/ 
8/506 55007 10028 20014


SUMMARY FOR THURSDAY, JANUARY 21, 2016 
  
TEMPERATURE (DEGREES F)
MAX.....30   NORMAL.....33
MIN.....15   NORMAL.....17 
MEAN....23   NORMAL.....25

DEPARTURE FROM 30-YEAR NORMAL........................-2
TOTAL DEPARTURE FOR THE MONTH.......................+74 [+3.3 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY..............42   DEPARTURE..........+2
TOTAL HEATING UNITS FOR THE MONTH.............755   DEPARTURE.........-73
TOTAL HEATING UNITS FOR THE SEASON...........2411   DEPARTURE........-722
TOTAL HEATING UNITS LAST SEASON TO DATE......2919   DIFFERENCE.......-508

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY...................38  WNW  AT  12:00 P.M.                   
                   ASOS........................35  WNW  AT  12:00 P.M. 
                   DAVIS.......................35  N    AT  12:00 P.M.* RMY 35
FASTEST MILE FOR YESTERDAY.....................26  WNW  AT  12:01 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE..................25  NW   AT  11:22 A.M.  
MAXIMUM 2-MINUTE DAVIS AVERAGE.................24  NNW  AT  11:22 A.M.  
AVERAGE WIND SPEED AND DIRECTION..............15.0 NNW
                   ASOS.......................14.5
                   DAVIS......................12.8 NNW [332 Deg.]
* MULTIPLE 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..........3.03  DEPARTURE......+0.05
                         ASOS..............3.15
TOTAL PRECIPITATION FOR THE YEAR...........3.03  DEPARTURE......+0.05  
                         ASOS..............3.15

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE.......-0.5
TOTAL SNOWFALL FOR THE MONTH................7.2  DEPARTURE.......-4.5
TOTAL SNOWFALL FOR THE SEASON...............7.5  DEPARTURE......-19.2

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 low since midnight is 14F; 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 22
HIGH 59F IN 1916
LOW -8F IN 1888,1976
PRECIP 1.24 INS. IN 1891,1987
SNOWFALL 10.0 INS. IN 2005
PEAK GUST 67 MPH W IN 1976

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

TODAY'S REPORT PREPARED BY: Brian Fitzgerald