BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
  
DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, JANUARY 16, 2008
ALL TIMES ARE IN EASTERN STANDARD TIME
 
JANUARY TEMPERATURES RETURN TO NEAR NORMAL
 
Today will become the first day since January
4th to average colder than normal and only by 
a degree or so.  The month is still averaging
8 degrees on the warm side through the first
half of the month.   
 
Today's observations:
 
7 A.M.   
Weather: Clear, stratocumulus clouds along northeast to
southeast horizon, few altocumulus
Temperature: 17F, Dew point: 14F, Wind: W @ 13 kts 
Sea-level pressure: 30.01 inches Hg, rising
Visibility: 45 miles 
6-hour min temp: 16F 
24-hourly precip: trace
24-hourly snowfall: trace.  
24-hourly asos precip: 0.00 in. 
Snow depth on ground: 9 inches
BHO SA 1155 CLR 45 162/17/14/2913/001/SC LYR ALG HRZN NE-SE 
FEW ACSL/ 8/540 4/009 51021 10020 20016
 
10 A.M.
Weather: Clear, stratocumulus distant offshore NE-ESE    
Temperature: 23F, Dew point: 17F, Wind: WNW at 14G22 kts
Sea-level pressure: 30.11 inches Hg, rising
Visibility: 60 miles 
BHO SA 1455 CLR 60 196/23/17/2914G22/011/ SC LYR DSNT OFFSHR 
ALG HRZN NE-ESE FEW CI SE OCNL ACSL/ 8/501 51034 
  
1 P.M.
Weather: Clear, stratocumulus layer distant NE-ESE offshore
Temperature: 29F, Dew point: 18F, Wind: WNW at 09G20 kts
Sea-level pressure: 30.10 inches Hg, steady
Visibility: 70 miles 
6-hourly max. temp. 29F
BHO SA 1755 CLR 70 194/29/18/3009G20/010/ 
SC LYR DSNT OFFSHR ALG HRZN NE-ESE LONE SC DSNT NNW 
WND 25V32/ 8/500 55002 10029 20017 
  
WEATHER SUMMARY FOR TUESDAY, JANUARY 15
 
TEMPERATURE (DEGREES F)
MAX.....30    NORMAL.....34 
MIN.....21    NORMAL.....18
MEAN....26    NORMAL.....26
DEPARTURE FROM 30-YEAR NORMAL..........  0 
TOTAL DEPARTURE FOR THE MONTH.........+122 [+7.9 DEGREES/DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY............39  DEPARTURE......  0 
TOTAL HEATING UNITS FOR THE MONTH...........458  DEPARTURE.....-121 
TOTAL HEATING UNITS FOR THE SEASON.........2625  DEPARTURE.....-283 * 
TOTAL HEATING UNITS LAST SEASON TO DATE....2242  DIFFERENCE....+383 
* corrected seasonal departure
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............25 NW  AT 10:50 P.M.   
                   AEROVANE.............24 NW  AT 10:23 P.M.   
                   ASOS.................23 NW  AT 11:23 P.M. 
                   DAVIS................21 WNW AT 11:16 P.M.   
FASTEST MILE FOR YESTERDAY..............16 NW  AT 11:17 P.M.  
MAXIMUM 2-MINUTE ASOS AVERAGE...........16 NW  AT 11:59 P.M.  
MAXIMUM 2-MINUTE DAVIS AVERAGE..........15 NW  AT 10:41 P.M.   
AVERAGE WIND SPEED AND DIRECTION.........8.5 W
                   ASOS..................8.8 
                   DAVIS.................8.1 W [270 deg]
  
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....trace DEPARTURE.....-0.16    
                         ASOS..............0.00 
TOTAL PRECIPITATION FOR THE MONTH..........3.28  DEPARTURE.....+0.96    
                         ASOS..............3.37  
TOTAL PRECIPITATION FOR THE YEAR...........3.28  DEPARTURE.....+0.96
                         ASOS..............3.37
  
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M.........trace DEPARTURE.....-0.5
TOTAL SNOWFALL FOR THE MONTH...............12.1  DEPARTURE.....+4.6
TOTAL SNOWFALL FOR THE SEASON..............42.6  DEPARTURE....+22.0
 
PRELIMINARY CLIMATE SUMMARY FOR JANUARY 2008 CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST
 
AERO: Aerovane recording wind system when significant
TSTM: Thunderstorm day
....: Data not yet available
 
1/1   38/28/33/+6/0.24/1.8/055/10   30 E   
1/2   29/7/18/-9/T/T/006/01         43 NW   Aero 43 MPH NW
1/3   11/2/7/-20/0/0/539/98         35 NW
1/4   30/2/16/-11/0/0/253/46        31 SSW
1/5   38/24/31/+4/0/0/292/53        28 SSW
1/6   47/34/41/+15/0/0/133/24       27 SSW 
1/7   54/39/47/+21/0/0/183/33       29 S 
1/8   65/45/55/+29/0/0/278/50       37 S 
1/9   59/42/51/+25/0.01/0/167/30    48 S
1/10  47/35/41/+15/0/0/335/60       35 W
1/11  55/35/45/+19/1.58/T/0/0       46 S    Aero 48 MPH S
1/12  47/32/40/+14/0/0/376/67       28 W
1/13  42/30/36/+10/0/0/455/81       33 ENE 
1/14  36/24/30/+4/1.45/10.3/000/00  37 NE   Aero 36 MPH NE
1/15  30/21/26/0/T/T/000/00         25 NW
 
1/16  morning low temp. 16F; normal low now 18F
      total snow depth on ground at 7 a.m. 9 inches 
       
NEW DAILY RECORDS FOR JANUARY 2008:
 
1/8 - New record high temperature of 65 deg; 
the previous record, 59 deg. in 1930
New record high minimum temperature of 45 deg; 
the previous record, 41 deg. in 1930, 1935, 1967
 
1/9 - New record high minimum temperature of 42 deg;
the previous record, 39 deg. in 1937, 1956.
 
1/11 - New record rainfall of 1.58 inches; surpasses
previous record of 1.14 inches in 1956
 
1/14 - New record daily snowfall of 10.3 inches; surpasses 
previous record of 9.0 inches in 1999. 
New record maximum daily precipitation of 1.45 inches; 
surpasses 1.35 inches in 2006
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR JANUARY 16
HIGH 63F IN 1995
LOW -12F IN 2004
PRECIP 1.32 INS. IN 1936
SNOWFALL 14.0 INS. IN 1965
PEAK GUST 79 MPH WNW IN 1960
 
RECORDS FOR JANUARY 17
HIGH 55F IN 1973,1995
LOW -8F IN 1907,1982
PRECIP 1.43 INS. IN 1956
SNOWFALL 13.4 INS. IN 1956
PEAK GUST 62 MPH S IN 1994
 
TODAY'S REPORT PREPARED By: Robert Skilling