BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, MARCH 5, 2009
ALL TIMES ARE IN EASTERN STANDARD TIME
 
NEW DAILY SNOWFALL RECORD FOR MARCH 2
After processing the precipitation records for the
March 1-3 snowfall, we have determined that the total
snowfall amount of 8.2 inches for March 2 is a new
record for that date, surpassing the previous record
of 7.1 inches which occurred in 1948.
 
Today's observations:
 
7 A.M.
Weather: Clear, few cirrus, temperature inversion present
Temperature: 18F, Dew point: 9F, Wind: W at 10 kts
Sea-level pressure: 30.42 inches Hg, rising
Visibility: 35 miles, light haze
6-hour minimum temperature: 16F
Snow depth on ground: 7 inches 
BHO SA 1155 CLR 35 302/18/9/2610/042/ FEW CI LGT HZ
INVSN PRSNT/ 8/001 4/007 51020 10020 20016
 
10 A.M.
Weather: Clear, few cirrus all quadrants
Temperature: 30F, Dew point: 12F, Wind: W at 8 kts,
Wind: Direction variability SW to WNW
Sea-level pressure: 30.46 inches Hg, rising
Visibility: 30 miles, hazy
BHO SA 1455 CLR 30 315/30/12/2608/046/
FEW CI ALQDS HAZY WND 22V30/ 8/001 51013
 
1 P.M.  
Weather: Clear, few cirrus S-W-N
Temperature: 38F, Dew point: 12F, Wind: WSW at 8 kts,
Wind: direction variability SSW to WNW 
Sea-level pressure: 30.40 inches Hg, falling
Visibility: 40 miles
6-hour maximum temperature: 38F
BHO SA 1755 CLR 40 294/38/12/2508/040/ FEW CI S-W-N
LGT HZ WND 21V29/ 8/001 58021 10038 20017
 
WEATHER SUMMARY FOR WEDNESDAY, MARCH 4, 2009
 
TEMPERATURE (DEGREES F)
MAX.....30    NORMAL.....41
MIN......6    NORMAL.....24
MEAN....18    NORMAL.....33
 
DEPARTURE FROM 30-YEAR NORMAL.................-15
TOTAL DEPARTURE FOR THE MONTH.................-49 [-12.5 per day] 
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY.............47  DEPARTURE........+14
TOTAL HEATING UNITS FOR THE MONTH............180  DEPARTURE........+47
TOTAL HEATING UNITS FOR THE SEASON..........4707  DEPARTURE.........+4
TOTAL HEATING UNITS LAST SEASON TO DATE.....4367  DIFFERENCE......+340
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............31 WNW AT  9:17 A.M.
                   ASOS.................30 NW  AT  4:16 P.M.
                   AEROVANE.............30 WNW AT  4:16 P.M.
                   DAVIS................30 WNW AT  8:47 A.M.
FASTEST MILE FOR YESTERDAY..............25 WNW AT  9:15 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE...........23 NW  AT  9:17 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE..........23 WNW AT  8:41 A.M.
                   AVERAGE............13.9 W
                   ASOS...............13.3 
                   DAVIS..............13.3 W  [279 DEGREES]
  
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.....0.00 DEPARTURE.........-0.15
                         ASOS...............0.00
TOTAL PRECIPITATION FOR THE MONTH...........1.48 DEPARTURE.........+0.88
                         ASOS...............1.34
TOTAL PRECIPITATION FOR THE YEAR............8.01 DEPARTURE.........-1.43
                         ASOS...............8.96 #
# Includes erroneous ASOS precipitation data on 1/1/09, 1/2/09 and 2/27/09.
 
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0   DEPARTURE.........-0.5
TOTAL SNOWFALL FOR THE MONTH...............10.2   DEPARTURE.........+8.2
TOTAL SNOWFALL FOR THE SEASON..............75.5   DEPARTURE........+28.1
 
PRELIMINARY CLIMATE SUMMARY FOR MARCH 2009 CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST
AERO: Aerovane recording wind system gust when significant
TSTM: Thunderstorm day (thunder heard some time during day)
....: Data not yet available, records not finalized
 
3/1/ 28/21/25/-7/0.26/1.9/000/00     38 NNE
3/2  22/15/19/-13/1.16/8.2/000/00    40 NNE
3/3  25/11/18/-14/0.01/0.1/640/94 *  33 NW
3/4  30/6/18/-14/0/0/684/100         31 WNW
* daily snowfall corrected for 3/3
 
3/5  morning low temp. 16F; our normal low now 25F
 
NEW DAILY RECORDS FOR MARCH 2009...
3/2: DAILY SNOWFALL 8.2 INS. SURPASSES PREVIOUS
     RECORD OF 7.1 INS. IN 1948
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR MARCH 5
HIGH 64 IN 1979
LOW -2 IN 1948
PRECIP 1.76 INS. IN 2001
SNOWFALL 13.0 INS. IN 1891
PEAK GUST 76e MPH WNW IN 1971
 
RECORDS FOR MARCH 6
HIGH 66 IN 1894
LOW 3 IN 1948, 2007
PRECIP 1.85 INS. IN 2001
SNOWFALL 15.5 INS. IN 2001
PEAK GUST 82 MPH S IN 1959
 
TODAY'S REPORT PREPARED BY: Stephanie Radner